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87 Commits
cli ... master

Author SHA1 Message Date
Avril 3267151615
Removed un-checked #[cold] from match arm branches.
3 years ago
Avril bfaff6067a
added connection acceptance filters
4 years ago
Avril 5c784482f6
ref lt
4 years ago
Avril bdf61340db
Packaging version 0.9.0
4 years ago
Avril 7635ff9d52
update Makefile
4 years ago
Avril acf2ac605e
Merge branch 'feed' into master
4 years ago
Avril d1251a592c
Merge branch 'master' of git.flanchan.moe:flanchan/genmarkov into master
4 years ago
Avril 75730cbe0f
working implementation of handler
4 years ago
Avril 5dc10547d5
handle okay
4 years ago
Avril 6453392758
remove direct dependancy on libc
4 years ago
Avril a6fc26a053
update ebuild
4 years ago
Avril 3b4dc663fa
Packaging version 0.8.1
4 years ago
Avril d8404f65ed
Packaging version 0.8.1
4 years ago
Avril 5280c622c9
todo
4 years ago
Avril 1c509031d6
range is configurable
4 years ago
Avril 107b34bcbd
document feed() pipeline
4 years ago
Avril 684a6f6aa0
repurpose split-sentance to make sense
4 years ago
Avril 8996b0bb7b
repurpose split-sentance to make sense; add feed-sentance for old functionality
4 years ago
Avril 633b4351c2
initialiser docs
4 years ago
Avril bcaac2b2e3
remove sender clone
4 years ago
Avril 59dcecded3
added instant-init; signal handler also waits for server
4 years ago
Avril 4e1e38a0fd
fix init bug
4 years ago
Avril 5ba673e64f
safe main-thread panics; save cannot happen until server initialised
4 years ago
Avril cb163a14e9
Packaging version 0.7.1
4 years ago
Avril 34a62da8ba
empty build.rs
4 years ago
Avril 460d2b0081
gentoo ebuild
4 years ago
Avril 5f2e3a5b5b
ld
4 years ago
Avril 7c67a4decc
remove unused dep
4 years ago
Avril 4227a12521
remove unused dep
4 years ago
Avril 9e25c7cfa3
Um
4 years ago
Avril b488194fd3
lock
4 years ago
Avril a6b6ee9a42
umm
4 years ago
Avril 13dbe37d2b
update makefile
4 years ago
Avril 0cf9a4ea20
merge stable HTTP server
4 years ago
Avril 053f41ee50
update readme
4 years ago
Avril ef5dc3cbf1
accepts AF_UNIX
4 years ago
Avril ca16c97629
change how no-num /sentance works
4 years ago
Avril 1d482029f3
sentance delimit
4 years ago
Avril c1e60503a6
remove const generics dependancy
4 years ago
Avril 988829c9b9
added outbound filter
4 years ago
Avril 2f9f4dbb3a
added /sentance/ chunking
4 years ago
Avril 633466b901
added /sentance/ chunking
4 years ago
Avril 31ee30db9e
update todo
4 years ago
Avril 77d4c2da73
removed redundant filter
4 years ago
Avril 032e5d74dc
fix punctuation eating bug. requiring nightly for now...
4 years ago
Avril 5b56fcffd5
fix punctuation eating bug. requiring nightly for now...
4 years ago
Avril 51d72ec7bd
bump ver
4 years ago
Avril ecf7ff6f07
sentances
4 years ago
Avril 51a5d0aeba
start sentance, sanitise
4 years ago
Avril a4fd1ddfbb
fix fuse error
4 years ago
Avril f2565088b4
fix fuse error
4 years ago
Avril 206d38300a
chunking feed lines feature
4 years ago
Avril df7c8df1b7
added streamreader
4 years ago
Avril ff42a0830c
update makefile
4 years ago
Avril 9dac784dbe
bump
4 years ago
Avril bd7e36b4f8
split-newlines
4 years ago
Avril daca2fb6ea
todo
4 years ago
Avril 6e48953fa7
um what
4 years ago
Avril cfbe9f385d
update makefile
4 years ago
Avril abd9d2c941
added api
4 years ago
Avril d44fa5c40b
wtf is wrong with the space eating
4 years ago
Avril 93e1d335dc
fix dumb shit
4 years ago
Avril 32a4964232
eh
4 years ago
Avril d2bb1cac00
temporarily disable compression
4 years ago
Avril 7bc8f9837a
temporarily disable compression
4 years ago
Avril c5993b54e9
FUCK FUCK YOU FUCK
4 years ago
Avril 8b5b753e9b
profile
4 years ago
Avril 77001e9c78
flush
4 years ago
Avril bccef1bba8
Merge branch 'serve' of git.flanchan.moe:flanchan/genmarkov into serve
4 years ago
Avril e5f1595b98
flush
4 years ago
Avril d97e23c94f
update makefile
4 years ago
Avril 45a93939de
signal handling
4 years ago
Avril 66470d6be5
update makefile
4 years ago
Avril 57c74bd411
reorganise
4 years ago
Avril ecc8854e44
config! saveload!
4 years ago
Avril 35f1de6c5e
fix makefile
4 years ago
Avril 4ead6b5a92
increase mpsc cap
4 years ago
Avril 87c8c525cd
installing makefile
4 years ago
Avril f1a1a5079f
makefile
4 years ago
Avril d61ece534f
Merge branch 'serve' of git.flanchan.moe:flanchan/genmarkov into serve
4 years ago
Avril 4afdba44c5
makefile
4 years ago
Avril 16db9ca7f1
update max size
4 years ago
Avril 7fe14a8e18
empty body
4 years ago
Avril 20656ce80e
201
4 years ago
Avril f25677f243
change default port
4 years ago
Avril ff80dc4730
web server working
4 years ago
Avril 19a3943012
working example
4 years ago

2
.gitignore vendored

@ -1,3 +1,5 @@
/target
chain.dat
*~
chain.dat
flamegraph.svg

1521
Cargo.lock generated

File diff suppressed because it is too large Load Diff

@ -1,16 +1,75 @@
[package]
name = "markov"
version = "0.1.2"
version = "0.9.1"
description = "Generate string of text from Markov chain fed by stdin"
authors = ["Avril <flanchan@cumallover.me>"]
edition = "2018"
license = "gpl-3.0-or-later"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[features]
default = ["compress-chain", "split-newlines", "api"]
# Compress the chain data file when saved to disk
compress-chain = ["async-compression", "bzip2-sys"]
# Treat each new line as a new set to feed instead of feeding the whole data at once
split-newlines = []
# Feed each sentance seperately with default /get api, instead of just each line / whole body
#
# Note that this happens after `split-newlines`.
feed-sentance = ["split-sentance"]
# Split input buffer's to feed by sentance as well as word boundaries.
#
# Note that this happens after `split-newlines`.
# This feature does nothing if `feed-sentance` is enabled.
split-sentance = []
# Always aggregate incoming buffer instead of streaming them
# This will make feeds faster but allocate full buffers for the aggregated body
#
# Large write: ~95ms
#
# NOTE: This does nothing if `split-newlines` is not enabled
always-aggregate = []
# Does nothing on versions 9.0+
hog-buffer = []
# Enable the /api/ route
api = []
# Do not wait 2 seconds before starting worker tasks after server
instant-init = []
[profile.release]
opt-level = 3
lto = "fat"
codegen-units = 1
strip=true
[dependencies]
chain = {package = "markov", version = "1.1.0"}
tokio = {version = "0.2", features=["full"]}
warp = "0.2"
pretty_env_logger = "0.4.0"
hyper = "0.13.8"
log = "0.4.11"
cfg-if = "1.0.0"
futures = "0.3.6"
serde_cbor = "0.11.1"
serde = {version ="1.0", features=["derive"]}
toml = "0.5.6"
async-compression = {version = "0.3.5", features=["tokio-02", "bzip2"], optional=true}
pin-project = "0.4"
smallmap = "1.1.5"
lazy_static = "1.4.0"
once_cell = "1.4.1"
bzip2-sys = {version = "0.1.9", optional = true}
cidr = {version = "0.1.1", features = ["serde"]}
[build-dependencies]
rustc_version = "0.2"

@ -0,0 +1,674 @@
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any implied license or other defenses to infringement that may
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If conditions are imposed on you (whether by court order, agreement or
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If the disclaimer of warranty and limitation of liability provided
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END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

@ -0,0 +1,29 @@
FEATURES:="api,split-sentance"
VERSION:=`cargo read-manifest | rematch - 'version":"([0-9\.]+)"' 1`
markov:
cargo build --release --features $(FEATURES)
strip target/release/markov
install:
-rc-service markov shutdown && sleep 0.6
-rc-service markov stop
cp -f target/release/markov /usr/local/bin/markov
rc-service markov start
reinstall: uninstall
cp -f target/release/markov /usr/local/bin/markov
rm -f /var/nginx/markov.dat
rc-service markov start
sleep 0.2
curl -X PUT --data-binary @default http://127.0.0.1:8001/put
uninstall:
-rc-service markov stop
rm -f /usr/local/bin/markov
package:
git add .
-git commit -S -m "Packaging version $(VERSION)"
cargo package
mv ./target/package/markov-$(VERSION).crate{,.gz}

@ -1,6 +0,0 @@
Generate strings from markov chain of stdin
Usage:
$ cat corpus | markov
$ cat corpus | markov <n of outputs to generate>

@ -0,0 +1,75 @@
# genmarkov
HTTP server connecting to a Markov chain
# Build requirements
Unix & Rust nightly are currently requirements to build, for now.
# Configuration
When ran with no arguments, `markov` will attempt to load the config file at `markov.toml`. If it does not exist, it will use the default configuration. (On debug builds, it will also create the default `markov.toml`.)
An example default configuration file is provided at [./markov.toml](markov.toml).
When ran with an argument specifying the config file however, it will attempt to load that. If it fails to load the file, the default will be used.
## Config file entries
| Name | Description | Default | Optional |
|-------------------------|---------------------------------------------------------|------------------|----------|
| `bindpoint` | Address or Unix domain socket for the server to bind to | `127.0.0.1:8001` | No |
| `file` | File to save and load the chain from | `chain.dat` | No |
| `max_content_length` | Max request body length to allow | `4194304` (4MB) | No |
| `max_gen_size` | Max number of strings for a request to generate at once | `256` | No |
| `save_interval_secs` | Number of seconds to ensure waiting before saving chain | `2` | Yes |
| `trust_x_forwarded_for` | Trust the `X-Forwarded-For` HTTP header | `false` | No |
| `filter` | Remove characters from incoming and/or outgoing text | None | Yes |
### AF_UNIX note
When binding to a Unix domain socket, prefix the path with `unix:/` (e.g. `unix://var/markov.socket`)
The server will not attempt to remove already existing sockets at the path, so ensure there isn't one before launching.
## Logging
Set the `RUST_LOG` environment variable to one of the following to switch runtime logging levels.
* `trace` - Most verbose
* `debug` - Verbose
* `info` - Show input and output to/from the chain and requests
* `warn` - Only show warnings (default)
* `error` - Only show errors
## Signals
On Unix systems at runtime, some signals are trapped:
| Signal | Description |
|-----------|------------------------------------------------------------------------|
| `SIGUSR1` | Immediately save the chain |
| `SIGUSR2` | Immediately load the chain |
| `SIGQUIT` | Ensure the chain is properly saved and then immediately call `abort()` |
| `SIGINT` | Perform a full graceful shutdown |
# Usage
The server exposes several paths for access of the chain
## Feeding
### `PUT /put`
Request body is fed to the chain
#### NOTE
Strings fed to the chain must be valid UTF-8 and a size below the value specified in the config file.
## Generating
### `GET /get`
Generate a string from the chain
### `GET /get/<number>`
Generate `<number>` strings from the chain
### `GET /get/sentance`
Generate a single sentance from the chain
### `GET /get/sentance/<number>`
Generate `<number>` sentances from the chain
#### NOTE
Number of strings/sentances must be lower than the value specified in the config file.
# License
GPL'd with <3

@ -0,0 +1 @@
Disallow exact same map input buffers by keeping hashes of input buffers.

@ -0,0 +1,26 @@
extern crate rustc_version;
use rustc_version::{version, version_meta, Channel};
fn main() {
// Assert we haven't travelled back in time
assert!(version().unwrap().major >= 1);
// Set cfg flags depending on release channel
match version_meta().unwrap().channel {
Channel::Stable => {
println!("cargo:rustc-cfg=stable");
}
Channel::Beta => {
println!("cargo:rustc-cfg=beta");
}
Channel::Nightly => {
println!("cargo:rustc-cfg=nightly");
}
Channel::Dev => {
println!("cargo:rustc-cfg=dev");
}
}
//println!("cargo:rustc-link-lib=static=bz2"); // TODO: Make this conditional for `compress-chain`
}

@ -0,0 +1,217 @@
# Copyright 2017-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Auto-Generated by cargo-ebuild 0.3.1
EAPI=7
CRATES="
aho-corasick-0.7.13
arc-swap-0.4.7
async-compression-0.3.5
atty-0.2.14
autocfg-0.1.7
autocfg-1.0.1
base64-0.12.3
bitflags-1.2.1
block-buffer-0.7.3
block-buffer-0.9.0
block-padding-0.1.5
buf_redux-0.8.4
byte-tools-0.3.1
byteorder-1.3.4
bytes-0.5.6
bzip2-0.3.3
bzip2-sys-0.1.9+1.0.8
cc-1.0.60
cfg-if-0.1.10
cfg-if-1.0.0
cloudabi-0.0.3
cpuid-bool-0.1.2
digest-0.8.1
digest-0.9.0
dtoa-0.4.6
either-1.6.1
env_logger-0.7.1
fake-simd-0.1.2
fixedbitset-0.2.0
fnv-1.0.7
fuchsia-cprng-0.1.1
fuchsia-zircon-0.3.3
fuchsia-zircon-sys-0.3.3
futures-0.3.6
futures-channel-0.3.6
futures-core-0.3.6
futures-executor-0.3.6
futures-io-0.3.6
futures-macro-0.3.6
futures-sink-0.3.6
futures-task-0.3.6
futures-util-0.3.6
generic-array-0.12.3
generic-array-0.14.4
getopts-0.2.21
getrandom-0.1.15
h2-0.2.6
half-1.6.0
hashbrown-0.9.1
headers-0.3.2
headers-core-0.2.0
hermit-abi-0.1.17
http-0.2.1
http-body-0.3.1
httparse-1.3.4
httpdate-0.3.2
humantime-1.3.0
hyper-0.13.8
idna-0.2.0
indexmap-1.6.0
input_buffer-0.3.1
iovec-0.1.4
itertools-0.9.0
itoa-0.4.6
kernel32-sys-0.2.2
lazy_static-1.4.0
libc-0.2.79
linked-hash-map-0.5.3
log-0.4.11
markov-1.1.0
matches-0.1.8
memchr-2.3.3
mime-0.3.16
mime_guess-2.0.3
mio-0.6.22
mio-named-pipes-0.1.7
mio-uds-0.6.8
miow-0.2.1
miow-0.3.5
multipart-0.17.0
net2-0.2.35
num_cpus-1.13.0
once_cell-1.4.1
opaque-debug-0.2.3
opaque-debug-0.3.0
percent-encoding-2.1.0
petgraph-0.5.1
pin-project-0.4.26
pin-project-internal-0.4.26
pin-project-lite-0.1.10
pin-utils-0.1.0
pkg-config-0.3.18
ppv-lite86-0.2.9
pretty_env_logger-0.4.0
proc-macro-hack-0.5.18
proc-macro-nested-0.1.6
proc-macro2-1.0.24
quick-error-1.2.3
quote-1.0.7
rand-0.6.5
rand-0.7.3
rand_chacha-0.1.1
rand_chacha-0.2.2
rand_core-0.3.1
rand_core-0.4.2
rand_core-0.5.1
rand_hc-0.1.0
rand_hc-0.2.0
rand_isaac-0.1.1
rand_jitter-0.1.4
rand_os-0.1.3
rand_pcg-0.1.2
rand_xorshift-0.1.1
rdrand-0.4.0
redox_syscall-0.1.57
regex-1.3.9
regex-syntax-0.6.18
remove_dir_all-0.5.3
rustc_version-0.2.3
ryu-1.0.5
safemem-0.3.3
scoped-tls-1.0.0
semver-0.9.0
semver-parser-0.7.0
serde-1.0.116
serde_cbor-0.11.1
serde_derive-1.0.116
serde_json-1.0.58
serde_urlencoded-0.6.1
serde_yaml-0.8.13
sha-1-0.8.2
sha-1-0.9.1
signal-hook-registry-1.2.1
slab-0.4.2
smallmap-1.1.5
socket2-0.3.15
syn-1.0.42
tempfile-3.1.0
termcolor-1.1.0
thread_local-1.0.1
time-0.1.44
tinyvec-0.3.4
tokio-0.2.22
tokio-macros-0.2.5
tokio-tungstenite-0.11.0
tokio-util-0.3.1
toml-0.5.6
tower-service-0.3.0
tracing-0.1.21
tracing-core-0.1.17
tracing-futures-0.2.4
try-lock-0.2.3
tungstenite-0.11.1
twoway-0.1.8
typenum-1.12.0
unicase-2.6.0
unicode-bidi-0.3.4
unicode-normalization-0.1.13
unicode-width-0.1.8
unicode-xid-0.2.1
url-2.1.1
urlencoding-1.1.1
utf-8-0.7.5
version_check-0.9.2
want-0.3.0
warp-0.2.5
wasi-0.10.0+wasi-snapshot-preview1
wasi-0.9.0+wasi-snapshot-preview1
winapi-0.2.8
winapi-0.3.9
winapi-build-0.1.1
winapi-i686-pc-windows-gnu-0.4.0
winapi-util-0.1.5
winapi-x86_64-pc-windows-gnu-0.4.0
ws2_32-sys-0.2.1
yaml-rust-0.4.4
"
inherit cargo
DESCRIPTION="Generate string of text from Markov chain fed by stdin"
# Double check the homepage as the cargo_metadata crate
# does not provide this value so instead repository is used
HOMEPAGE="https://flanchan.moe/markov/"
SRC_URI="$(cargo_crate_uris ${CRATES}) https://git.flanchan.moe/attachments/cf0b9095-2403-465b-b3aa-61b121134c84 -> markov-0.7.1.crate"
RESTRICT="mirror"
# License set may be more restrictive as OR is not respected
# use cargo-license for a more accurate license picture
LICENSE="GPL-3+"
SLOT="0"
KEYWORDS="~amd64"
IUSE="+compress-chain +split-newlines +api split-sentance always-aggregate hog-buffer"
DEPEND="compress-chain? ( app-arch/bzip2 )"
RDEPEND=""
src_configure() {
local myfeatures=(
$(usev compress-chain)
$(usev split-newlines)
$(usev api)
$(usev split-sentance)
$(usev always-aggregate)
$(usev hog-buffer)
)
#TODO: This hack slows compilation down I think, but without it ld fails so... We should add cargo buildscript to do this instead
use compress-chain && export RUSTFLAGS="${RUSTFLAGS} -ldylib=bz2"
cargo_src_configure --no-default-features
}

@ -0,0 +1,217 @@
# Copyright 2017-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Auto-Generated by cargo-ebuild 0.3.1
EAPI=7
CRATES="
aho-corasick-0.7.13
arc-swap-0.4.7
async-compression-0.3.5
atty-0.2.14
autocfg-0.1.7
autocfg-1.0.1
base64-0.12.3
bitflags-1.2.1
block-buffer-0.7.3
block-buffer-0.9.0
block-padding-0.1.5
buf_redux-0.8.4
byte-tools-0.3.1
byteorder-1.3.4
bytes-0.5.6
bzip2-0.3.3
bzip2-sys-0.1.9+1.0.8
cc-1.0.60
cfg-if-0.1.10
cfg-if-1.0.0
cloudabi-0.0.3
cpuid-bool-0.1.2
digest-0.8.1
digest-0.9.0
dtoa-0.4.6
either-1.6.1
env_logger-0.7.1
fake-simd-0.1.2
fixedbitset-0.2.0
fnv-1.0.7
fuchsia-cprng-0.1.1
fuchsia-zircon-0.3.3
fuchsia-zircon-sys-0.3.3
futures-0.3.6
futures-channel-0.3.6
futures-core-0.3.6
futures-executor-0.3.6
futures-io-0.3.6
futures-macro-0.3.6
futures-sink-0.3.6
futures-task-0.3.6
futures-util-0.3.6
generic-array-0.12.3
generic-array-0.14.4
getopts-0.2.21
getrandom-0.1.15
h2-0.2.6
half-1.6.0
hashbrown-0.9.1
headers-0.3.2
headers-core-0.2.0
hermit-abi-0.1.17
http-0.2.1
http-body-0.3.1
httparse-1.3.4
httpdate-0.3.2
humantime-1.3.0
hyper-0.13.8
idna-0.2.0
indexmap-1.6.0
input_buffer-0.3.1
iovec-0.1.4
itertools-0.9.0
itoa-0.4.6
kernel32-sys-0.2.2
lazy_static-1.4.0
libc-0.2.79
linked-hash-map-0.5.3
log-0.4.11
markov-1.1.0
matches-0.1.8
memchr-2.3.3
mime-0.3.16
mime_guess-2.0.3
mio-0.6.22
mio-named-pipes-0.1.7
mio-uds-0.6.8
miow-0.2.1
miow-0.3.5
multipart-0.17.0
net2-0.2.35
num_cpus-1.13.0
once_cell-1.4.1
opaque-debug-0.2.3
opaque-debug-0.3.0
percent-encoding-2.1.0
petgraph-0.5.1
pin-project-0.4.26
pin-project-internal-0.4.26
pin-project-lite-0.1.10
pin-utils-0.1.0
pkg-config-0.3.18
ppv-lite86-0.2.9
pretty_env_logger-0.4.0
proc-macro-hack-0.5.18
proc-macro-nested-0.1.6
proc-macro2-1.0.24
quick-error-1.2.3
quote-1.0.7
rand-0.6.5
rand-0.7.3
rand_chacha-0.1.1
rand_chacha-0.2.2
rand_core-0.3.1
rand_core-0.4.2
rand_core-0.5.1
rand_hc-0.1.0
rand_hc-0.2.0
rand_isaac-0.1.1
rand_jitter-0.1.4
rand_os-0.1.3
rand_pcg-0.1.2
rand_xorshift-0.1.1
rdrand-0.4.0
redox_syscall-0.1.57
regex-1.3.9
regex-syntax-0.6.18
remove_dir_all-0.5.3
rustc_version-0.2.3
ryu-1.0.5
safemem-0.3.3
scoped-tls-1.0.0
semver-0.9.0
semver-parser-0.7.0
serde-1.0.116
serde_cbor-0.11.1
serde_derive-1.0.116
serde_json-1.0.58
serde_urlencoded-0.6.1
serde_yaml-0.8.13
sha-1-0.8.2
sha-1-0.9.1
signal-hook-registry-1.2.1
slab-0.4.2
smallmap-1.1.5
socket2-0.3.15
syn-1.0.42
tempfile-3.1.0
termcolor-1.1.0
thread_local-1.0.1
time-0.1.44
tinyvec-0.3.4
tokio-0.2.22
tokio-macros-0.2.5
tokio-tungstenite-0.11.0
tokio-util-0.3.1
toml-0.5.6
tower-service-0.3.0
tracing-0.1.21
tracing-core-0.1.17
tracing-futures-0.2.4
try-lock-0.2.3
tungstenite-0.11.1
twoway-0.1.8
typenum-1.12.0
unicase-2.6.0
unicode-bidi-0.3.4
unicode-normalization-0.1.13
unicode-width-0.1.8
unicode-xid-0.2.1
url-2.1.1
urlencoding-1.1.1
utf-8-0.7.5
version_check-0.9.2
want-0.3.0
warp-0.2.5
wasi-0.10.0+wasi-snapshot-preview1
wasi-0.9.0+wasi-snapshot-preview1
winapi-0.2.8
winapi-0.3.9
winapi-build-0.1.1
winapi-i686-pc-windows-gnu-0.4.0
winapi-util-0.1.5
winapi-x86_64-pc-windows-gnu-0.4.0
ws2_32-sys-0.2.1
yaml-rust-0.4.4
"
inherit cargo
DESCRIPTION="Generate string of text from Markov chain fed by stdin"
# Double check the homepage as the cargo_metadata crate
# does not provide this value so instead repository is used
HOMEPAGE="https://flanchan.moe/markov/"
SRC_URI="$(cargo_crate_uris ${CRATES}) https://git.flanchan.moe/attachments/c6f37bfc-afd8-462f-807f-ab9f95197680 -> markov-0.8.1.crate"
RESTRICT="mirror"
# License set may be more restrictive as OR is not respected
# use cargo-license for a more accurate license picture
LICENSE="GPL-3+"
SLOT="0"
KEYWORDS="~amd64"
IUSE="+compress-chain +split-newlines +api split-sentance feed-sentance always-aggregate hog-buffer"
DEPEND="compress-chain? ( app-arch/bzip2 )"
RDEPEND=""
src_configure() {
local myfeatures=(
$(usev compress-chain)
$(usev split-newlines)
$(usev api)
$(usev split-sentance)
$(usev feed-sentance)
$(usev always-aggregate)
$(usev hog-buffer)
)
#TODO: This hack slows compilation down I think, but without it ld fails so... We should add cargo buildscript to do this instead
use compress-chain && export RUSTFLAGS="${RUSTFLAGS} -ldylib=bz2"
cargo_src_configure --no-default-features
}

@ -0,0 +1,15 @@
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
<maintainer type="person">
<email>flanchan@cumallover.me</email>
</maintainer>
<use>
<flag name="compress-chain">Compress chain when saving/loading</flag>
<flag name="split-newlines">Treat each new line as a new set to feed</flag>
<flag name="api">Enable /api route</flag>
<flag name="feed-sentance">Further split buffers by sentance, feeding a new one for each.</flag>
<flag name="split-sentance">Split by sentance as well as word boundaries</flag>
<flag name="always-aggregate">Always operate on aggregated request body (can speed up writes at the cost of memory)</flag>
<flag name="hog-buffer">Acquire chain mutex write lock while streaming body (can speed up writes, but can also allow for DoS)</flag></use>
</pkgmetadata>

@ -0,0 +1 @@
LICENSE

@ -0,0 +1,203 @@
# Copyright 2017-2020 Gentoo Authors
# Distributed under the terms of the GNU General Public License v2
# Auto-Generated by cargo-ebuild 0.3.1
EAPI=7
CRATES="
aho-corasick-0.7.13
arc-swap-0.4.7
async-compression-0.3.5
atty-0.2.14
autocfg-0.1.7
autocfg-1.0.1
base64-0.12.3
bitflags-1.2.1
block-buffer-0.7.3
block-buffer-0.9.0
block-padding-0.1.5
buf_redux-0.8.4
byte-tools-0.3.1
byteorder-1.3.4
bytes-0.5.6
bzip2-0.3.3
bzip2-sys-0.1.9+1.0.8
cc-1.0.60
cfg-if-0.1.10
cfg-if-1.0.0
cloudabi-0.0.3
cpuid-bool-0.1.2
digest-0.8.1
digest-0.9.0
dtoa-0.4.6
either-1.6.1
env_logger-0.7.1
fake-simd-0.1.2
fixedbitset-0.2.0
fnv-1.0.7
fuchsia-cprng-0.1.1
fuchsia-zircon-0.3.3
fuchsia-zircon-sys-0.3.3
futures-0.3.6
futures-channel-0.3.6
futures-core-0.3.6
futures-executor-0.3.6
futures-io-0.3.6
futures-macro-0.3.6
futures-sink-0.3.6
futures-task-0.3.6
futures-util-0.3.6
generic-array-0.12.3
generic-array-0.14.4
getopts-0.2.21
getrandom-0.1.15
h2-0.2.6
half-1.6.0
hashbrown-0.9.1
headers-0.3.2
headers-core-0.2.0
hermit-abi-0.1.17
http-0.2.1
http-body-0.3.1
httparse-1.3.4
httpdate-0.3.2
humantime-1.3.0
hyper-0.13.8
idna-0.2.0
indexmap-1.6.0
input_buffer-0.3.1
iovec-0.1.4
itertools-0.9.0
itoa-0.4.6
kernel32-sys-0.2.2
lazy_static-1.4.0
libc-0.2.79
linked-hash-map-0.5.3
log-0.4.11
markov-1.1.0
matches-0.1.8
memchr-2.3.3
mime-0.3.16
mime_guess-2.0.3
mio-0.6.22
mio-named-pipes-0.1.7
mio-uds-0.6.8
miow-0.2.1
miow-0.3.5
multipart-0.17.0
net2-0.2.35
num_cpus-1.13.0
once_cell-1.4.1
opaque-debug-0.2.3
opaque-debug-0.3.0
percent-encoding-2.1.0
petgraph-0.5.1
pin-project-0.4.26
pin-project-internal-0.4.26
pin-project-lite-0.1.10
pin-utils-0.1.0
pkg-config-0.3.18
ppv-lite86-0.2.9
pretty_env_logger-0.4.0
proc-macro-hack-0.5.18
proc-macro-nested-0.1.6
proc-macro2-1.0.24
quick-error-1.2.3
quote-1.0.7
rand-0.6.5
rand-0.7.3
rand_chacha-0.1.1
rand_chacha-0.2.2
rand_core-0.3.1
rand_core-0.4.2
rand_core-0.5.1
rand_hc-0.1.0
rand_hc-0.2.0
rand_isaac-0.1.1
rand_jitter-0.1.4
rand_os-0.1.3
rand_pcg-0.1.2
rand_xorshift-0.1.1
rdrand-0.4.0
redox_syscall-0.1.57
regex-1.3.9
regex-syntax-0.6.18
remove_dir_all-0.5.3
rustc_version-0.2.3
ryu-1.0.5
safemem-0.3.3
scoped-tls-1.0.0
semver-0.9.0
semver-parser-0.7.0
serde-1.0.116
serde_cbor-0.11.1
serde_derive-1.0.116
serde_json-1.0.58
serde_urlencoded-0.6.1
serde_yaml-0.8.13
sha-1-0.8.2
sha-1-0.9.1
signal-hook-registry-1.2.1
slab-0.4.2
smallmap-1.1.5
socket2-0.3.15
syn-1.0.42
tempfile-3.1.0
termcolor-1.1.0
thread_local-1.0.1
time-0.1.44
tinyvec-0.3.4
tokio-0.2.22
tokio-macros-0.2.5
tokio-tungstenite-0.11.0
tokio-util-0.3.1
toml-0.5.6
tower-service-0.3.0
tracing-0.1.21
tracing-core-0.1.17
tracing-futures-0.2.4
try-lock-0.2.3
tungstenite-0.11.1
twoway-0.1.8
typenum-1.12.0
unicase-2.6.0
unicode-bidi-0.3.4
unicode-normalization-0.1.13
unicode-width-0.1.8
unicode-xid-0.2.1
url-2.1.1
urlencoding-1.1.1
utf-8-0.7.5
version_check-0.9.2
want-0.3.0
warp-0.2.5
wasi-0.10.0+wasi-snapshot-preview1
wasi-0.9.0+wasi-snapshot-preview1
winapi-0.2.8
winapi-0.3.9
winapi-build-0.1.1
winapi-i686-pc-windows-gnu-0.4.0
winapi-util-0.1.5
winapi-x86_64-pc-windows-gnu-0.4.0
ws2_32-sys-0.2.1
yaml-rust-0.4.4
"
inherit cargo
DESCRIPTION="Generate string of text from Markov chain fed by stdin"
# Double check the homepage as the cargo_metadata crate
# does not provide this value so instead repository is used
HOMEPAGE="homepage field in Cargo.toml inaccessible to cargo metadata"
SRC_URI="$(cargo_crate_uris ${CRATES})"
RESTRICT="mirror"
# License set may be more restrictive as OR is not respected
# use cargo-license for a more accurate license picture
LICENSE="Apache-2.0 Apache-2.0 WITH LLVM-exception BSD-2-Clause BSD-3-Clause BSL-1.0 CC0-1.0 ISC MIT Unlicense Zlib gpl-3.0-or-later"
SLOT="0"
KEYWORDS="~amd64"
IUSE=""
DEPEND=""
RDEPEND=""

@ -0,0 +1,19 @@
bindpoint = '127.0.0.1:8001'
file = 'chain.dat'
max_content_length = 4194304
max_gen_size = 256
save_interval_secs = 2
trust_x_forwarded_for = false
feed_bounds = '2..'
[filter]
inbound = ''
outbound = ''
[writer]
backlog = 32
internal_backlog = 8
capacity = 4
[mask]
default = 'Accept'

@ -0,0 +1,55 @@
//! API errors
//use super::*;
use std::{
error,
fmt,
};
use warp::{
Rejection,
Reply,
};
#[derive(Debug)]
pub enum ApiError {
Body,
}
impl ApiError
{
#[inline] fn error_code(&self) -> warp::http::StatusCode
{
status!(match self {
Self::Body => 422,
})
}
}
impl warp::reject::Reject for ApiError{}
impl error::Error for ApiError{}
impl std::fmt::Display for ApiError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
match self {
Self::Body => write!(f, "invalid data in request body"),
}
}
}
impl From<std::str::Utf8Error> for ApiError
{
fn from(_: std::str::Utf8Error) -> Self
{
Self::Body
}
}
// Handles API rejections
pub async fn rejection(err: Rejection) -> Result<impl Reply, Rejection>
{
if let Some(api) = err.find::<ApiError>() {
Ok(warp::reply::with_status(format!("ApiError: {}\n", api), api.error_code()))
} else {
Err(err)
}
}

@ -0,0 +1,32 @@
//! For API calls if enabled
use super::*;
use std::{
iter,
convert::Infallible,
};
use futures::{
stream::{
self,
BoxStream,
StreamExt,
},
};
pub mod error;
use error::ApiError;
mod single;
#[inline] fn aggregate(mut body: impl Buf) -> Result<String, std::str::Utf8Error>
{
std::str::from_utf8(&body.to_bytes()).map(ToOwned::to_owned)
}
pub async fn single(host: IpAddr, num: Option<usize>, body: impl Buf) -> Result<impl warp::Reply, warp::reject::Rejection>
{
single::single_stream(host, num, body).await
.map(|rx| Response::new(Body::wrap_stream(rx.map(move |x| {
info!("{} <- {:?}", host, x);
x
}))))
.map_err(warp::reject::custom)
}

@ -0,0 +1,47 @@
//! Handler for /single/
use super::*;
//TODO: Change to stream impl like normal `feed` has, instead of taking aggregate?
pub async fn single_stream(host: IpAddr, num: Option<usize>, body: impl Buf) -> Result<BoxStream<'static, Result<String, Infallible>>, ApiError>
{
let body = aggregate(body)?;
info!("{} <- {:?}", host, &body[..]);
let mut chain = Chain::new();
if_debug! {
let timer = std::time::Instant::now();
}
cfg_if! {
if #[cfg(feature="split-newlines")] {
for body in body.split('\n').filter(|line| !line.trim().is_empty()) {
feed::feed(&mut chain, body, 1..);
}
}else {
feed::feed(&mut chain, body, 1..);
}
}
if_debug!{
trace!("Write took {}ms", timer.elapsed().as_millis());
}
if chain.is_empty() {
Ok(stream::empty().boxed())
} else {
match num {
None => Ok(stream::iter(iter::once(Ok(chain.generate_str()))).boxed()),
Some(num) => {
let (mut tx, rx) = mpsc::channel(num);
tokio::spawn(async move {
for string in chain.str_iter_for(num) {
if let Err(e) = tx.send(string).await {
error!("Failed to send string to body, aborting: {:?}", e.0);
break;
}
}
});
Ok(StreamExt::map(rx, |x| Ok::<_, Infallible>(x)).boxed())
}
}
}
}

@ -0,0 +1,171 @@
//! For binding to sockets
use super::*;
use futures::{
prelude::*,
};
use std::{
marker::{
Send,
Unpin,
},
fmt,
error,
path::{
Path,
PathBuf,
},
};
use tokio::{
io::{
self,
AsyncRead,
AsyncWrite,
},
};
#[derive(Debug)]
pub enum BindError<E>
{
IO(io::Error),
Warp(warp::Error),
Other(E),
}
impl<E: error::Error + 'static> error::Error for BindError<E>
{
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
Some(match &self {
Self::IO(io) => io,
Self::Other(o) => o,
Self::Warp(w) => w,
})
}
}
impl<E: fmt::Display> fmt::Display for BindError<E>
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
match self {
Self::IO(io) => write!(f, "io error: {}", io),
Self::Other(other) => write!(f, "{}", other),
Self::Warp(warp) => write!(f, "server error: {}", warp),
}
}
}
#[derive(Debug)]
pub struct BindpointParseError;
impl error::Error for BindpointParseError{}
impl fmt::Display for BindpointParseError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "Failed to parse bindpoint as IP or unix domain socket")
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, PartialOrd)]
pub enum Bindpoint
{
Unix(PathBuf),
TCP(SocketAddr),
}
impl fmt::Display for Bindpoint
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
match self {
Self::Unix(unix) => write!(f, "unix:/{}", unix.to_string_lossy()),
Self::TCP(tcp) => write!(f, "{}", tcp),
}
}
}
impl std::str::FromStr for Bindpoint
{
type Err = BindpointParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(if let Ok(ip) = s.parse::<SocketAddr>() {
Self::TCP(ip)
} else if s.starts_with("unix:/") {
Self::Unix(PathBuf::from(&s[6..].to_owned()))
} else {
return Err(BindpointParseError);
})
}
}
fn bind_unix(to: impl AsRef<Path>) -> io::Result<impl TryStream<Ok= impl AsyncRead + AsyncWrite + Send + Unpin + 'static + Send, Error = impl Into<Box<dyn std::error::Error + Send + Sync>>>>
{
debug!("Binding to AF_UNIX: {:?}", to.as_ref());
let listener = tokio::net::UnixListener::bind(to)?;
Ok(listener)
}
pub fn serve<F>(server: warp::Server<F>, bind: Bindpoint, signal: impl Future<Output=()> + Send + 'static) -> Result<(Bindpoint, BoxFuture<'static, ()>), BindError<std::convert::Infallible>>
where F: Filter + Clone + Send + Sync + 'static,
<F::Future as TryFuture>::Ok: warp::Reply,
{
Ok(match bind {
Bindpoint::TCP(sock) => server.try_bind_with_graceful_shutdown(sock, signal).map(|(sock, fut)| (Bindpoint::TCP(sock), fut.boxed())).map_err(BindError::Warp)?,
Bindpoint::Unix(unix) => {
(Bindpoint::Unix(unix.clone()),
server.serve_incoming_with_graceful_shutdown(bind_unix(unix).map_err(BindError::IO)?, signal).boxed())
},
})
}
impl From<SocketAddr> for Bindpoint
{
fn from(from: SocketAddr) -> Self
{
Self::TCP(from)
}
}
pub fn try_serve<F>(server: warp::Server<F>, bind: impl TryBindpoint, signal: impl Future<Output=()> + Send + 'static) -> Result<(Bindpoint, BoxFuture<'static, ()>), BindError<impl error::Error + 'static>>
where F: Filter + Clone + Send + Sync + 'static,
<F::Future as TryFuture>::Ok: warp::Reply,
{
serve(server, bind.try_parse().map_err(BindError::Other)?, signal).map_err(BindError::coerce)
}
pub trait TryBindpoint: Sized
{
type Err: error::Error + 'static;
fn try_parse(self) -> Result<Bindpoint, Self::Err>;
}
impl TryBindpoint for Bindpoint
{
type Err = std::convert::Infallible;
fn try_parse(self) -> Result<Bindpoint, Self::Err>
{
Ok(self)
}
}
impl<T: AsRef<str>> TryBindpoint for T
{
type Err = BindpointParseError;
fn try_parse(self) -> Result<Bindpoint, Self::Err>
{
self.as_ref().parse()
}
}
impl BindError<std::convert::Infallible>
{
pub fn coerce<T>(self) -> BindError<T>
{
match self {
Self::Warp(w) => BindError::Warp(w),
Self::IO(w) => BindError::IO(w),
/*#[cold]*/ _ => unreachable!(),
}
}
}

@ -0,0 +1,29 @@
use std::ptr;
/// Copy slice of bytes only
///
/// # Notes
/// `dst` and `src` must not overlap. See [move_slice].
pub fn copy_slice(dst: &mut [u8], src: &[u8]) -> usize
{
let sz = std::cmp::min(dst.len(),src.len());
unsafe {
//libc::memcpy(&mut dst[0] as *mut u8 as *mut c_void, &src[0] as *const u8 as *const c_void, sz);
ptr::copy_nonoverlapping(&src[0] as *const u8, &mut dst[0] as *mut u8, sz);
}
sz
}
/// Move slice of bytes only
///
/// # Notes
/// `dst` and `src` can overlap.
pub fn move_slice(dst: &mut [u8], src: &[u8]) -> usize
{
let sz = std::cmp::min(dst.len(),src.len());
unsafe {
//libc::memmove(&mut dst[0] as *mut u8 as *mut c_void, &src[0] as *const u8 as *const c_void, sz);
ptr::copy(&src[0] as *const u8, &mut dst[0] as *mut u8, sz);
}
sz
}

@ -0,0 +1,282 @@
//! Stream related things
use super::*;
use std::{
task::{
Poll,
Context,
},
pin::Pin,
marker::PhantomData,
};
use tokio::{
io::{
AsyncBufRead,
AsyncRead,
},
prelude::*,
};
use futures::{
stream::{
Stream,
StreamExt,
Fuse,
},
};
use pin_project::pin_project;
/// Converts a stream of byte-containing objects into an `AsyncRead` and `AsyncBufRead`er.
#[pin_project]
pub struct StreamReader<I, T>
where I: Stream<Item=T>
{
#[pin]
source: Fuse<I>,
buffer: Vec<u8>,
}
impl<T, I> StreamReader<I, T>
where I: Stream<Item=T>,
T: AsRef<[u8]>
{
/// The current buffer
pub fn buffer(&self) -> &[u8]
{
&self.buffer[..]
}
/// Consume into the original stream
pub fn into_inner(self) -> I
{
self.source.into_inner()
}
/// Create a new instance with a buffer capacity
pub fn with_capacity(source: I, cap: usize) -> Self
{
Self {
source: source.fuse(),
buffer: Vec::with_capacity(cap)
}
}
/// Create a new instance from this stream
pub fn new(source: I) -> Self
{
Self {
source: source.fuse(),
buffer: Vec::new(),
}
}
/// Attempt to add to this buffer
#[cold] fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<usize>
{
let this = self.project();
match this.source.poll_next(cx) {
Poll::Ready(None) => Poll::Ready(0),
Poll::Ready(Some(buf)) if buf.as_ref().len() > 0 => {
let buf = buf.as_ref();
this.buffer.extend_from_slice(buf);
Poll::Ready(buf.len())
},
_ => Poll::Pending,
}
}
}
impl<T: AsRef<[u8]>, I: Stream<Item=T>> AsyncRead for StreamReader<I,T>
{
fn poll_read(self: Pin<&mut Self>, cx: &mut Context<'_>, buf: &mut [u8]) -> Poll<io::Result<usize>> {
let this = self.project();
if this.buffer.len() != 0 {
// We can fill the whole buffer, do it.
Poll::Ready(Ok(bytes::copy_slice(buf, this.buffer.drain(..buf.len()).as_slice())))
} else {
// Buffer is empty, try to fill it
match match this.source.poll_next(cx) {
Poll::Ready(None) => Poll::Ready(0),
Poll::Ready(Some(buf)) if buf.as_ref().len() > 0 => {
let buf = buf.as_ref();
this.buffer.extend_from_slice(buf);
Poll::Ready(buf.len())
},
_ => Poll::Pending,
} {
Poll::Ready(0) => Poll::Ready(Ok(0)),
Poll::Ready(x) => {
// x has been written
Poll::Ready(Ok(bytes::copy_slice(buf, this.buffer.drain(..x).as_slice())))
},
_ => Poll::Pending,
}
}
}
}
impl<T: AsRef<[u8]>, I: Stream<Item=T>> AsyncBufRead for StreamReader<I,T>
{
fn poll_fill_buf(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<io::Result<&[u8]>> {
let this = self.project();
if this.buffer.len() < 1 {
// Fetch more into buffer
match match this.source.poll_next(cx) {
Poll::Ready(None) => Poll::Ready(0),
Poll::Ready(Some(buf)) if buf.as_ref().len() > 0 => {
let buf = buf.as_ref();
this.buffer.extend_from_slice(buf);
Poll::Ready(buf.len())
},
_ => Poll::Pending,
} {
Poll::Ready(0) => Poll::Ready(Ok(&[])), // should we return EOF error here?
Poll::Ready(x) => Poll::Ready(Ok(&this.buffer[..x])),
_ => Poll::Pending
}
} else {
Poll::Ready(Ok(&this.buffer[..]))
}
}
fn consume(self: Pin<&mut Self>, amt: usize) {
self.project().buffer.drain(..amt);
}
}
#[cfg(test)]
mod tests
{
use super::*;
use tokio::{
sync::{
mpsc,
},
};
#[tokio::test]
async fn stream_of_vec()
{
let (mut tx, rx) = mpsc::channel(16);
let sender = tokio::spawn(async move {
tx.send("Hello ").await.unwrap();
tx.send("world").await.unwrap();
tx.send("\n").await.unwrap();
tx.send("How ").await.unwrap();
tx.send("are ").await.unwrap();
tx.send("you").await.unwrap();
});
let mut reader = StreamReader::new(rx);
let mut output = String::new();
let mut read;
while {read = reader.read_line(&mut output).await.expect("Failed to read"); read!=0} {
println!("Read: {}", read);
}
println!("Done: {:?}", output);
sender.await.expect("Child panic");
assert_eq!(&output[..], "Hello world\nHow are you");
}
}
/// A stream that chunks its input.
#[pin_project]
pub struct ChunkingStream<S, T, Into=Vec<T>>
{
#[pin] stream: Fuse<S>,
buf: Vec<T>,
cap: usize,
_output: PhantomData<Into>,
push_now: bool,
}
impl<S, T, Into> ChunkingStream<S,T, Into>
where S: Stream<Item=T>,
Into: From<Vec<T>>
{
pub fn new(stream: S, sz: usize) -> Self
{
Self {
stream: stream.fuse(),
buf: Vec::with_capacity(sz),
cap: sz,
_output: PhantomData,
push_now: false,
}
}
pub fn into_inner(self) -> S
{
self.stream.into_inner()
}
pub fn cap(&self) -> usize
{
self.cap
}
pub fn buffer(&self) -> &[T]
{
&self.buf[..]
}
pub fn get_ref(&self) -> &S
{
self.stream.get_ref()
}
pub fn get_mut(&mut self)-> &mut S
{
self.stream.get_mut()
}
/// Force the next read to send the buffer even if it's not full.
///
/// # Note
/// The buffer still won't send if it's empty.
pub fn push_now(&mut self)
{
self.push_now= true;
}
/// Consume into the current held buffer
pub fn into_buffer(self) -> Vec<T>
{
self.buf
}
/// Take the buffer now
pub fn take_now(&mut self) -> Into
{
std::mem::replace(&mut self.buf, Vec::with_capacity(self.cap)).into()
}
}
impl<S, T, Into> Stream for ChunkingStream<S,T, Into>
where S: Stream<Item=T>,
Into: From<Vec<T>>
{
type Item = Into;
fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
while !(self.push_now && !self.buf.is_empty()) && self.buf.len() < self.cap {
// Buffer isn't full, keep filling
let this = self.as_mut().project();
match this.stream.poll_next(cx) {
Poll::Ready(None) => {
// Stream is over
break;
},
Poll::Ready(Some(item)) => {
this.buf.push(item);
},
_ => return Poll::Pending,
}
}
debug!("Sending buffer of {} (cap {})", self.buf.len(), self.cap);
// Buffer is full or we reach end of stream
Poll::Ready(if self.buf.len() == 0 {
None
} else {
let this = self.project();
*this.push_now = false;
let output = std::mem::replace(this.buf, Vec::with_capacity(*this.cap));
Some(output.into())
})
}
}

@ -0,0 +1,282 @@
//! Server config
use super::*;
use std::{
net::SocketAddr,
path::Path,
io,
borrow::Cow,
num::NonZeroU64,
error,
fmt,
};
use tokio::{
fs::OpenOptions,
prelude::*,
time::Duration,
io::BufReader,
};
use ipfilt::IpFilter;
pub const DEFAULT_FILE_LOCATION: &'static str = "markov.toml";
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Hash, Serialize, Deserialize)]
pub struct Config
{
pub bindpoint: String,
pub file: String,
pub max_content_length: u64,
pub max_gen_size: usize,
pub save_interval_secs: Option<NonZeroU64>,
pub trust_x_forwarded_for: bool,
#[serde(default)]
pub feed_bounds: String,
#[serde(default)]
pub filter: FilterConfig,
#[serde(default)]
pub writer: WriterConfig,
#[serde(default)]
pub mask: IpFilter,
}
#[derive(Debug, Default, Clone, PartialEq, Eq, PartialOrd, Hash, Serialize, Deserialize)]
pub struct FilterConfig
{
#[serde(default)]
inbound: String,
#[serde(default)]
outbound: String,
}
#[derive(Debug, Copy, Clone, PartialEq, Eq, PartialOrd, Hash, Serialize, Deserialize)]
pub struct WriterConfig
{
pub backlog: usize,
pub internal_backlog: usize,
pub capacity: usize,
pub timeout_ms: Option<u64>,
pub throttle_ms: Option<u64>,
}
impl Default for WriterConfig
{
#[inline]
fn default() -> Self
{
Self {
backlog: 32,
internal_backlog: 8,
capacity: 4,
timeout_ms: None,
throttle_ms: None,
}
}
}
impl WriterConfig
{
fn create_settings(self, bounds: range::DynRange<usize>) -> handle::Settings
{
handle::Settings{
backlog: self.backlog,
internal_backlog: self.internal_backlog,
capacity: self.capacity,
timeout: self.timeout_ms.map(tokio::time::Duration::from_millis).unwrap_or(handle::DEFAULT_TIMEOUT),
throttle: self.throttle_ms.map(tokio::time::Duration::from_millis),
bounds,
}
}
}
impl FilterConfig
{
fn get_inbound_filter(&self) -> sanitise::filter::Filter
{
let filt: sanitise::filter::Filter = self.inbound.parse().unwrap();
if !filt.is_empty()
{
info!("Loaded inbound filter: {:?}", filt.iter().collect::<String>());
}
filt
}
fn get_outbound_filter(&self) -> sanitise::filter::Filter
{
let filt: sanitise::filter::Filter = self.outbound.parse().unwrap();
if !filt.is_empty()
{
info!("Loaded outbound filter: {:?}", filt.iter().collect::<String>());
}
filt
}
}
impl Default for Config
{
#[inline]
fn default() -> Self
{
Self {
bindpoint: SocketAddr::from(([127,0,0,1], 8001)).to_string(),
file: "chain.dat".to_owned(),
max_content_length: 1024 * 1024 * 4,
max_gen_size: 256,
save_interval_secs: Some(unsafe{NonZeroU64::new_unchecked(2)}),
trust_x_forwarded_for: false,
filter: Default::default(),
feed_bounds: "2..".to_owned(),
writer: Default::default(),
mask: Default::default(),
}
}
}
impl Config
{
/// Try to generate a config cache for this instance.
pub fn try_gen_cache(&self) -> Result<Cache, InvalidConfigError>
{
macro_rules! section {
($name:literal, $expr:expr) => {
match $expr {
Ok(v) => Ok(v),
Err(e) => Err(InvalidConfigError($name, Box::new(e))),
}
}
}
use std::ops::RangeBounds;
let feed_bounds = section!("feed_bounds", self.parse_feed_bounds()).and_then(|bounds| if bounds.contains(&0) {
Err(InvalidConfigError("feed_bounds", Box::new(opaque_error!("Bounds not allowed to contains 0 (they were `{}`)", bounds))))
} else {
Ok(bounds)
})?;
Ok(Cache {
handler_settings: self.writer.create_settings(feed_bounds.clone()),
feed_bounds,
inbound_filter: self.filter.get_inbound_filter(),
outbound_filter: self.filter.get_outbound_filter(),
})
}
/// Try to parse the `feed_bounds`
fn parse_feed_bounds(&self) -> Result<range::DynRange<usize>, range::ParseError>
{
if self.feed_bounds.len() == 0 {
Ok(feed::DEFAULT_FEED_BOUNDS.into())
} else {
self.feed_bounds.parse()
}
}
pub fn save_interval(&self) -> Option<Duration>
{
self.save_interval_secs.map(|x| Duration::from_secs(x.into()))
}
pub async fn load(from: impl AsRef<Path>) -> io::Result<Self>
{
let file = OpenOptions::new()
.read(true)
.open(from).await?;
let mut buffer= String::new();
let reader = BufReader::new(file);
let mut lines = reader.lines();
while let Some(line) = lines.next_line().await? {
buffer.push_str(&line[..]);
buffer.push('\n');
}
toml::de::from_str(&buffer[..]).map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))
}
pub async fn save(&self, to: impl AsRef<Path>) -> io::Result<()>
{
let config = toml::ser::to_string_pretty(self).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
let mut file = OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(to).await?;
file.write_all(config.as_bytes()).await?;
file.shutdown().await?;
Ok(())
}
}
/// Try to load config file specified by args, or default config file
pub fn load() -> impl futures::future::Future<Output =Option<Config>>
{
load_args(std::env::args().skip(1))
}
async fn load_args<I: Iterator<Item=String>>(mut from: I) -> Option<Config>
{
let place = if let Some(arg) = from.next() {
trace!("File {:?} provided", arg);
Cow::Owned(arg)
} else {
warn!("No config file provided. Using default location {:?}", DEFAULT_FILE_LOCATION);
Cow::Borrowed(DEFAULT_FILE_LOCATION)
};
match Config::load(place.as_ref()).await {
Ok(cfg) => {
info!("Loaded config file {:?}", place);
Some(cfg)
},
Err(err) => {
error!("Failed to load config file from {:?}: {}", place, err);
None
},
}
}
#[derive(Debug)]
pub struct InvalidConfigError(&'static str, Box<dyn error::Error+ 'static>);
impl InvalidConfigError
{
pub fn field(&self) -> &str
{
&self.0[..]
}
}
impl error::Error for InvalidConfigError
{
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
Some(self.1.as_ref())
}
}
impl fmt::Display for InvalidConfigError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f,"failed to parse field `{}`: {}", self.0, self.1)
}
}
/// Caches some parsed config arguments
#[derive(Clone, PartialEq)]
pub struct Cache
{
pub feed_bounds: range::DynRange<usize>,
pub inbound_filter: sanitise::filter::Filter,
pub outbound_filter: sanitise::filter::Filter,
pub handler_settings: handle::Settings,
}
impl fmt::Debug for Cache
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
f.debug_struct("Cache")
.field("feed_bounds", &self.feed_bounds)
.field("inbound_filter", &self.inbound_filter.iter().collect::<String>())
.field("outbound_filter", &self.outbound_filter.iter().collect::<String>())
.field("handler_settings", &self.handler_settings)
.finish()
}
}

@ -0,0 +1,183 @@
//! Extensions
use super::*;
use std::{
iter,
ops::{
Range,
Deref,DerefMut,
},
marker::{
PhantomData,
Send,
},
};
pub trait StringJoinExt: Sized
{
fn join<P: AsRef<str>>(self, sep: P) -> String;
}
impl<I,T> StringJoinExt for I
where I: IntoIterator<Item=T>,
T: AsRef<str>
{
fn join<P: AsRef<str>>(self, sep: P) -> String
{
let mut string = String::new();
for (first, s) in iter::successors(Some(true), |_| Some(false)).zip(self.into_iter())
{
if !first {
string.push_str(sep.as_ref());
}
string.push_str(s.as_ref());
}
string
}
}
pub trait FindSliceBounds
{
type SliceType: ?Sized;
fn slice_bounds(&self, from: &Self::SliceType) -> Range<usize>;
}
impl<T: ?Sized + AsRef<str>> FindSliceBounds for T
{
type SliceType = str;
fn slice_bounds(&self, from: &Self::SliceType) -> Range<usize>{
let this = self.as_ref();
unsafe {
let sptr = from.as_ptr();
let eptr = sptr.add(from.len());
let ssptr = this.as_ptr();
let septr = ssptr.add(this.len());
let sptr = sptr as usize;
let ssptr = ssptr as usize;
let eptr = eptr as usize;
let septr = septr as usize;
assert!(sptr >= ssptr && sptr <= septr, "Start index of slice is outside the bounds of self");
assert!(eptr >= ssptr && eptr <= septr, "End index of slice is outside the bounds of self");
(sptr - ssptr)..(eptr - ssptr)
}
}
}
pub trait SliceInPlace
{
fn drain_inverse<R: std::ops::RangeBounds<usize>>(&mut self, slice: R);
}
impl SliceInPlace for String
{
fn drain_inverse<R: std::ops::RangeBounds<usize>>(&mut self, slice: R)
{
use std::ops::Bound;
match slice.end_bound() {
Bound::Excluded(&ex) => drop(self.drain(ex..)),
Bound::Included(&inc) => drop(self.drain(inc+1..)),
_ => (),
};
match slice.start_bound() {
Bound::Included(&ex) => drop(self.drain(..ex)),
Bound::Excluded(&ex) => drop(..ex+1),
_ => ()
};
}
}
pub trait TrimInPlace
{
fn trim_in_place(&mut self) -> &mut Self;
}
impl TrimInPlace for String
{
fn trim_in_place(&mut self) -> &mut Self {
let bounds = self.slice_bounds(self.trim());
self.drain_inverse(bounds);
self
}
}
pub trait MapTuple2<T,U>
{
fn map<V,W, F: FnOnce((T,U)) -> (V,W)>(self, fun: F) -> (V,W);
}
impl<T,U> MapTuple2<T,U> for (T,U)
{
#[inline] fn map<V,W, F: FnOnce((T,U)) -> (V,W)>(self, fun: F) -> (V,W)
{
fun(self)
}
}
/// To make sure we don't keep this data across an `await` boundary.
#[repr(transparent)]
pub struct AssertNotSend<T>(pub T, PhantomData<*const T>);
impl<T> AssertNotSend<T>
{
pub const fn new(from :T) -> Self
{
Self(from, PhantomData)
}
pub fn into_inner(self) -> T
{
self.0
}
}
/// Require a future is Send
#[inline(always)] pub fn require_send<T: Send>(t: T) -> T
{
t
}
/// Require a value implements a specific trait
#[macro_export] macro_rules! require_impl {
($t:path: $val:expr) => {
{
#[inline(always)] fn require_impl<T: $t >(val: T) -> T {
val
}
require_impl($val)
}
}
}
impl<T> Deref for AssertNotSend<T>
{
type Target = T;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl<T> DerefMut for AssertNotSend<T>
{
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
pub trait ChunkStreamExt<T>: Sized
{
fn chunk_into<I: From<Vec<T>>>(self, sz: usize) -> chunking::ChunkingStream<Self,T,I>;
fn chunk(self, sz: usize) -> chunking::ChunkingStream<Self, T>
{
self.chunk_into(sz)
}
}
impl<S, T> ChunkStreamExt<T> for S
where S: Stream<Item=T>
{
fn chunk_into<I: From<Vec<T>>>(self, sz: usize) -> chunking::ChunkingStream<Self,T,I>
{
chunking::ChunkingStream::new(self, sz)
}
}

@ -0,0 +1,160 @@
//! Feeding the chain
use super::*;
#[cfg(any(feature="feed-sentance", feature="split-sentance"))]
use sanitise::Sentance;
#[allow(unused_imports)]
use futures::stream;
pub const DEFAULT_FEED_BOUNDS: std::ops::RangeFrom<usize> = 2..;
/// Feed `what` into `chain`, at least `bounds` tokens.
///
/// # Tokenising
/// How the tokens are split within this function that operates on single buffers is determined largely by the features `split-sentance` and `feed-sentance` determining the use of the sentance API.
///
/// ## Pipeline
/// Since this is called on single buffers, it happens after the `split-newlines` tokenising if it's enabled, and thus the sentance API is only able to operate on each seperate line if that feature is enabled, regardless of `always-aggre`, or `feed-sentance` or `split-sentance`.
/// This is the pipeline for just within this function, after splitting through newlines if enabled.
///
/// * `feed-sentance`
/// ** Feed the buffer through the sentance split tokeniser
/// ** Feed the sentances through the word split tokeniser
/// ** Feed each collection of words into the chain seperately
/// * `split-sentance`
/// ** Feed the buffer through the sentance split tokeniser
/// ** Feed the sentances through the word split tokeniser
/// ** Feed the flattened collection into the chain once, concatenated.
/// * Neither
/// ** Feed the buffer through the word split tokeniser
/// ** Feed the collection into the chain
pub fn feed(chain: &mut Chain<String>, what: impl AsRef<str>, bounds: impl std::ops::RangeBounds<usize>)
{
cfg_if! {
if #[cfg(feature="feed-sentance")] {
let map = Sentance::new_iter(&what) //get each sentance in string
.map(|what| what.words()
.map(|s| s.to_owned()).collect::<Vec<_>>());
debug_assert!(!bounds.contains(&0), "Cannot allow 0 size feeds");
for map in map {// feed each sentance seperately
if bounds.contains(&map.len()) {
debug!("Feeding chain {} items", map.len());
chain.feed(map);
}
else {
debug!("Ignoring feed of invalid length {}: {:?}", map.len(), map);
}
}
} else {
cfg_if!{
if #[cfg(feature="split-sentance")] {
let map = Sentance::new_iter(&what) //get each sentance in string
.map(|what| what.words())
.flatten() // add all into one buffer
.map(|s| s.to_owned()).collect::<Vec<_>>();
} else {
let map: Vec<_> = sanitise::words(what.as_ref()).map(ToOwned::to_owned)
.collect();
}
}
debug_assert!(!bounds.contains(&0), "Cannot allow 0 size feeds");
if bounds.contains(&map.len()) {
//debug!("Feeding chain {} items", map.len());
chain.feed(map);
}
else {
debug!("Ignoring feed of invalid length {}: {:?}", map.len(), map);
}
}
}
}
pub async fn full(who: &IpAddr, state: State, body: impl Unpin + Stream<Item = Result<impl Buf, impl std::error::Error + 'static>>) -> Result<usize, FillBodyError> {
let mut written = 0usize;
if_debug! {
let timer = std::time::Instant::now();
}
//let bounds = &state.config_cache().feed_bounds;
macro_rules! feed {
($buffer:expr) => {
{
let buffer = $buffer;
state.chain_write(buffer).await.map_err(|_| FillBodyError)?;
}
}
}
cfg_if!{
if #[cfg(any(not(feature="split-newlines"), feature="always-aggregate"))] {
let mut body = body;
let mut buffer = Vec::new();
while let Some(buf) = body.next().await {
let mut body = buf.map_err(|_| FillBodyError)?;
while body.has_remaining() {
if body.bytes().len() > 0 {
buffer.extend_from_slice(body.bytes());
let cnt = body.bytes().len();
body.advance(cnt);
written += cnt;
}
}
}
let buffer = std::str::from_utf8(&buffer[..]).map_err(|_| FillBodyError)?;
let buffer = state.inbound_filter().filter_cow(buffer);
info!("{} -> {:?}", who, buffer);
cfg_if! {
if #[cfg(feature="split-newlines")] {
feed!(stream::iter(buffer.split('\n').filter(|line| !line.trim().is_empty())
.map(|x| x.to_owned())))
} else {
feed!(stream::once(async move{buffer.into_owned()}));
}
}
} else {
use tokio::prelude::*;
let reader = chunking::StreamReader::new(body.filter_map(|x| x.map(|mut x| x.to_bytes()).ok()));
let lines = reader.lines();
feed!(lines.filter_map(|x| x.ok().and_then(|line| {
let line = state.inbound_filter().filter_cow(&line);
let line = line.trim();
if !line.is_empty() {
//#[cfg(not(feature="hog-buffer"))]
//let mut chain = state.chain().write().await; // Acquire mutex once per line? Is this right?
info!("{} -> {:?}", who, line);
written+=line.len();
Some(line.to_owned())
} else {
None
}
})));
}
}
if_debug! {
trace!("Write took {}ms", timer.elapsed().as_millis());
}
Ok(written)
}
#[derive(Debug)]
pub struct FillBodyError;
impl error::Error for FillBodyError{}
impl warp::reject::Reject for FillBodyError{}
impl fmt::Display for FillBodyError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "failed to feed chain with this data")
}
}

@ -0,0 +1,74 @@
use std::{
net::{
IpAddr,
AddrParseError,
},
str,
error,
fmt,
};
#[derive(Debug)]
pub struct XFormatError;
impl error::Error for XFormatError{}
impl fmt::Display for XFormatError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "X-Forwarded-For was not in the correct format")
}
}
#[derive(Debug, Clone, PartialOrd, PartialEq, Eq, Default)]
pub struct XForwardedFor(Vec<IpAddr>);
impl XForwardedFor
{
pub fn new() -> Self
{
Self(Vec::new())
}
pub fn single(ip: impl Into<IpAddr>) -> Self
{
Self(vec![ip.into()])
}
pub fn addrs(&self) -> &[IpAddr]
{
&self.0[..]
}
pub fn into_first(self) -> Option<IpAddr>
{
self.0.into_iter().next()
}
pub fn into_addrs(self) -> Vec<IpAddr>
{
self.0
}
}
impl str::FromStr for XForwardedFor
{
type Err = XFormatError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut output = Vec::new();
for next in s.split(',')
{
output.push(next.trim().parse()?)
}
Ok(Self(output))
}
}
impl From<AddrParseError> for XFormatError
{
#[inline(always)] fn from(_: AddrParseError) -> Self
{
Self
}
}

@ -0,0 +1,46 @@
//! Generating the strings
use super::*;
use tokio::sync::mpsc::error::SendError;
use futures::StreamExt;
#[derive(Debug, Default)]
pub struct GenBodyError(Option<String>);
impl error::Error for GenBodyError{}
impl fmt::Display for GenBodyError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
if let Some(z) = &self.0 {
write!(f, "failed to write read string {:?} to body", z)
} else {
write!(f, "failed to read string from chain. it might be empty.")
}
}
}
pub async fn body(state: State, num: Option<usize>, mut output: mpsc::Sender<String>) -> Result<(), GenBodyError>
{
let mut chain = state.chain_read();
let filter = state.outbound_filter();
match num {
Some(num) if num < state.config().max_gen_size => {
let mut chain = chain.take(num);
while let Some(string) = chain.next().await {
output.send(filter.filter_owned(string)).await?;
}
},
_ => output.send(filter.filter_owned(chain.next().await.ok_or_else(GenBodyError::default)?)).await?,
}
Ok(())
}
impl From<SendError<String>> for GenBodyError
{
#[inline] fn from(from: SendError<String>) -> Self
{
Self(Some(from.0))
}
}

@ -0,0 +1,392 @@
//! Chain handler.
use super::*;
use std::{
marker::Send,
sync::Weak,
num::NonZeroUsize,
task::{Poll, Context,},
pin::Pin,
};
use tokio::{
sync::{
RwLock,
RwLockReadGuard,
mpsc::{
self,
error::SendError,
},
watch,
Notify,
},
task::JoinHandle,
time::{
self,
Duration,
},
};
use futures::StreamExt;
pub const DEFAULT_TIMEOUT: Duration= Duration::from_secs(5);
/// Settings for chain handler
#[derive(Debug, Clone, PartialEq)]
pub struct Settings
{
pub backlog: usize,
pub internal_backlog: usize,
pub capacity: usize,
pub timeout: Duration,
pub throttle: Option<Duration>,
pub bounds: range::DynRange<usize>,
}
impl Settings
{
/// Should we keep this string.
#[inline] fn matches(&self, _s: &str) -> bool
{
true
}
}
impl Default for Settings
{
#[inline]
fn default() -> Self
{
Self {
backlog: 32,
internal_backlog: 8,
capacity: 4,
timeout: Duration::from_secs(5),
throttle: Some(Duration::from_millis(200)),
bounds: feed::DEFAULT_FEED_BOUNDS.into(),
}
}
}
#[derive(Debug)]
struct HostInner<T>
{
input: mpsc::Receiver<Vec<T>>,
shutdown: watch::Receiver<bool>,
}
#[derive(Debug)]
struct Handle<T: Send+ chain::Chainable>
{
chain: RwLock<chain::Chain<T>>,
input: mpsc::Sender<Vec<T>>,
opt: Settings,
notify_write: Arc<Notify>,
push_now: Arc<Notify>,
shutdown: watch::Sender<bool>,
/// Data used only for the worker task.
host: msg::Once<HostInner<T>>,
}
#[derive(Clone, Debug)]
pub struct ChainHandle<T: Send + chain::Chainable>(Arc<Box<Handle<T>>>);
impl<T: Send+ chain::Chainable + 'static> ChainHandle<T>
{
pub fn with_settings(chain: chain::Chain<T>, opt: Settings) -> Self
{
let (shutdown_tx, shutdown) = watch::channel(false);
let (itx, irx) = mpsc::channel(opt.backlog);
Self(Arc::new(Box::new(Handle{
chain: RwLock::new(chain),
input: itx,
opt,
push_now: Arc::new(Notify::new()),
notify_write: Arc::new(Notify::new()),
shutdown: shutdown_tx,
host: msg::Once::new(HostInner{
input: irx,
shutdown,
})
})))
}
/// Acquire the chain read lock
async fn chain(&self) -> RwLockReadGuard<'_, chain::Chain<T>>
{
self.0.chain.read().await
}
/// A reference to the chain
pub fn chain_ref(&self) -> &RwLock<chain::Chain<T>>
{
&self.0.chain
}
/// Create a stream that reads generated values forever.
pub fn read(&self) -> ChainStream<T>
{
ChainStream{
chain: Arc::downgrade(&self.0),
buffer: Vec::with_capacity(self.0.opt.backlog),
}
}
/// Send this buffer to the chain
pub fn write(&self, buf: Vec<T>) -> impl futures::Future<Output = Result<(), SendError<Vec<T>>>> + 'static
{
let mut write = self.0.input.clone();
async move {
write.send(buf).await
}
}
/// Send this stream buffer to the chain
pub fn write_stream<'a, I: Stream<Item=T>>(&self, buf: I) -> impl futures::Future<Output = Result<(), SendError<Vec<T>>>> + 'a
where I: 'a
{
let mut write = self.0.input.clone();
async move {
write.send(buf.collect().await).await
}
}
/// Send this buffer to the chain
pub async fn write_in_place(&self, buf: Vec<T>) -> Result<(), SendError<Vec<T>>>
{
self.0.input.clone().send(buf).await
}
/// A referencer for the notifier
pub fn notify_when(&self) -> &Arc<Notify>
{
&self.0.notify_write
}
/// Force the pending buffers to be written to the chain now
pub fn push_now(&self)
{
self.0.push_now.notify();
}
/// Hang the worker thread, preventing it from taking any more inputs and also flushing it.
///
/// # Panics
/// If there was no worker thread.
pub fn hang(&self)
{
trace!("Communicating hang request");
self.0.shutdown.broadcast(true).expect("Failed to communicate hang");
}
}
impl ChainHandle<String>
{
#[deprecated = "use read() pls"]
pub async fn generate_body(&self, state: &state::State, num: Option<usize>, mut output: mpsc::Sender<String>) -> Result<(), SendError<String>>
{
let chain = self.chain().await;
if !chain.is_empty() {
let filter = state.outbound_filter();
match num {
Some(num) if num < state.config().max_gen_size => {
//This could DoS writes, potentially.
for string in chain.str_iter_for(num) {
output.send(filter.filter_owned(string)).await?;
}
},
_ => output.send(filter.filter_owned(chain.generate_str())).await?,
}
}
Ok(())
}
}
/// Host this handle on the current task.
///
/// # Panics
/// If `from` has already been hosted.
pub async fn host(from: ChainHandle<String>)
{
let opt = from.0.opt.clone();
let mut data = from.0.host.unwrap().await;
let (mut tx, mut child) = {
// The `real` input channel.
let from = from.clone();
let opt = opt.clone();
let (tx, rx) = mpsc::channel::<Vec<Vec<_>>>(opt.internal_backlog);
(tx, tokio::spawn(async move {
let mut rx = if let Some(thr) = opt.throttle {
time::throttle(thr, rx).boxed()
} else {
rx.boxed()
};
trace!("child: Begin waiting on parent");
while let Some(item) = rx.next().await {
if item.len() > 0 {
info!("Write lock acq");
let mut lock = from.0.chain.write().await;
for item in item.into_iter()
{
use std::ops::DerefMut;
for item in item.into_iter() {
feed::feed(lock.deref_mut(), item, &from.0.opt.bounds);
}
}
trace!("Signalling write");
from.0.notify_write.notify();
}
}
trace!("child: exiting");
}))
};
trace!("Begin polling on child");
tokio::select!{
v = &mut child => {
match v {
/*#[cold]*/ Ok(_) => {warn!("Child exited before we have? This should probably never happen.")},//Should never happen.
Err(e) => {error!("Child exited abnormally. Aborting: {}", e)}, //Child panic or cancel.
}
},
_ = async move {
let mut rx = data.input.chunk(opt.capacity); //we don't even need this tbh, oh well.
if !data.shutdown.recv().await.unwrap_or(true) { //first shutdown we get for free
while Arc::strong_count(&from.0) > 2 {
if *data.shutdown.borrow() {
break;
}
tokio::select!{
Some(true) = data.shutdown.recv() => {
debug!("Got shutdown (hang) request. Sending now then breaking");
let mut rest = {
let irx = rx.get_mut();
irx.close(); //accept no more inputs
let mut output = Vec::with_capacity(opt.capacity);
while let Ok(item) = irx.try_recv() {
output.push(item);
}
output
};
rest.extend(rx.take_now());
if rest.len() > 0 {
if let Err(err) = tx.send(rest).await {
error!("Failed to force send buffer, exiting now: {}", err);
}
}
break;
}
_ = time::delay_for(opt.timeout) => {
trace!("Setting push now");
rx.push_now();
}
_ = from.0.push_now.notified() => {
debug!("Got force push signal");
let take =rx.take_now();
rx.push_now();
if take.len() > 0 {
if let Err(err) = tx.send(take).await {
error!("Failed to force send buffer: {}", err);
break;
}
}
}
Some(buffer) = rx.next() => {
debug!("Sending {} (cap {})", buffer.len(), buffer.capacity());
if let Err(err) = tx.send(buffer).await {
// Receive closed?
//
// This probably shouldn't happen, as we `select!` for it up there and child never calls `close()` on `rx`.
// In any case, it means we should abort.
/*#[cold]*/ error!("Failed to send buffer: {}", err);
break;
}
}
}
}
}
let last = rx.into_buffer();
if last.len() > 0 {
if let Err(err) = tx.send(last).await {
error!("Failed to force send last part of buffer: {}", err);
} else {
trace!("Sent rest of buffer");
}
}
} => {
// Normal exit
trace!("Normal exit")
},
}
trace!("Waiting on child");
// No more handles except child, no more possible inputs.
child.await.expect("Child panic");
trace!("Returning");
}
/// Spawn a new chain handler for this chain.
pub fn spawn(from: chain::Chain<String>, opt: Settings) -> (JoinHandle<()>, ChainHandle<String>)
{
debug!("Spawning with opt: {:?}", opt);
let handle = ChainHandle::with_settings(from, opt);
(tokio::spawn(host(handle.clone())), handle)
}
#[derive(Debug)]
pub struct ChainStream<T: Send + chain::Chainable>
{
chain: Weak<Box<Handle<T>>>,
buffer: Vec<T>,
}
impl ChainStream<String>
{
async fn try_pull(&mut self, n: usize) -> Option<NonZeroUsize>
{
if n == 0 {
return None;
}
if let Some(read) = self.chain.upgrade() {
let chain = read.chain.read().await;
if chain.is_empty() {
return None;
}
let n = if n == 1 {
self.buffer.push(chain.generate_str());
1
} else {
self.buffer.extend(chain.str_iter_for(n));
n //for now
};
Some(unsafe{NonZeroUsize::new_unchecked(n)})
} else {
None
}
}
}
impl Stream for ChainStream<String>
{
type Item = String;
fn poll_next(self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Option<Self::Item>> {
use futures::Future;
let this = self.get_mut();
if this.buffer.len() == 0 {
let pull = this.try_pull(this.buffer.capacity());
tokio::pin!(pull);
match pull.poll(cx) {
Poll::Ready(Some(_)) => {},
Poll::Pending => return Poll::Pending,
_ => return Poll::Ready(None),
};
}
debug_assert!(this.buffer.len()>0);
Poll::Ready(Some(this.buffer.remove(0)))
}
}

@ -0,0 +1,181 @@
//! Filter accepts and denies based on cidr masks.
use super::*;
use cidr::{
Cidr,
IpCidr,
};
use std::{
net::{
IpAddr,
},
error,
fmt,
};
#[derive(Debug)]
pub struct IpFilterDeniedError(IpAddr, Option<IpCidr>);
impl warp::reject::Reject for IpFilterDeniedError{}
impl error::Error for IpFilterDeniedError{}
impl fmt::Display for IpFilterDeniedError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "Denied {} due to ", self.0)?;
match &self.1 {
Some(cidr) => write!(f, "matching rule {}", cidr),
None => write!(f, "non-matching accept rule"),
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, Hash, Copy, PartialOrd, Ord, Serialize, Deserialize)]
pub enum Rule
{
Accept,
Deny,
}
impl Default for Rule
{
#[inline]
fn default() -> Self
{
Self::Deny
}
}
impl Rule
{
fn into_result<'a>(self, net: Option<&'a IpCidr>) -> Result<Option<&'a IpCidr>, Option<IpCidr>>
{
if let Self::Accept = self {
Ok(net)
} else {
Err(net.cloned())
}
}
}
#[derive(Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize)]
pub struct IpFilter
{
/// The default fallback rule
pub default: Rule,
#[serde(default)]
accept: Vec<IpCidr>,
#[serde(default)]
deny: Vec<IpCidr>,
}
#[inline] fn find_in<'a>(needle: &IpAddr, haystack: &'a [IpCidr]) -> Option<&'a IpCidr>
{
for x in haystack.iter()
{
if x.contains(needle) {
return Some(x);
}
}
None
}
impl Default for IpFilter
{
#[inline]
fn default() -> Self
{
Self {
default: Rule::Deny,
accept: vec![cidr::Cidr::new_host([127,0,0,1].into())],
deny: Vec::default(),
}
}
}
impl IpFilter
{
/// Create a new CIDR filter with thie default rule.
///
/// Use `default()` to use with default rule.
pub fn new(fallback: Rule) -> Self
{
Self {
default: fallback,
accept: Vec::new(),
deny: Vec::new(),
}
}
/// Checks the rule for this IP, returns a result if it should accept or not.
///
/// If acceptance rule is met, return the CIDR match that caused the acceptance if applicable
///
/// If acceptance rule is not met, return in the error which CIDR match cause the deny if applicable
pub fn check(&self, ip: &IpAddr) -> Result<Option<&'_ IpCidr>, IpFilterDeniedError>
{
let accept = find_in(ip, &self.accept[..]);
let deny = find_in(ip, &self.deny[..]);
let (rule, cidr) = match (accept, deny) {
(None, Some(net)) => (Rule::Deny, Some(net)),
(Some(net), None) => (Rule::Accept, Some(net)),
(Some(ac), Some(den)) if ac != den => {
if ac.network_length() > den.network_length() {
(Rule::Accept, Some(ac))
} else {
(Rule::Deny, Some(den))
}
},
_ => (self.default, None)
};
rule.into_result(cidr)
.map_err(|cidr| IpFilterDeniedError(*ip, cidr))
}
pub fn accept_mask(&self) -> &[IpCidr]
{
&self.accept[..]
}
pub fn deny_mask(&self) -> &[IpCidr]
{
&self.deny[..]
}
pub fn accept_range(&mut self, items: impl IntoIterator<Item = IpCidr>)
{
self.accept.extend(items)
}
pub fn deny_range(&mut self, items: impl IntoIterator<Item = IpCidr>)
{
self.deny.extend(items)
}
pub fn accept_one(&mut self, item: IpCidr)
{
self.accept.push(item)
}
pub fn deny_one(&mut self, items: IpCidr)
{
self.deny.push(items)
}
/// Can any connection ever be accepted?
pub fn possible(&self) -> bool
{
//TODO: Test this
!(self.default == Rule::Deny && self.accept.len() == 0) &&
!(self.deny.iter().find(|x| x.network_length() == 0).is_some() && self.accept.len() == 0)
}
}
pub async fn recover(err: warp::Rejection) -> Result<impl warp::Reply, warp::Rejection>
{
if let Some(t) = err.find::<IpFilterDeniedError>() {
error!("Denying access to {} because of {:?} (403)", t.0, t.1);
Ok(warp::http::Response::builder()
.status(status!(403))
.body(format!("Access denied: {}", t)))
} else {
Err(err)
}
}

@ -1,49 +1,340 @@
#![allow(dead_code)]
#[macro_use] extern crate log;
use chain::{
Chain,
};
use warp::{
Filter,
Buf,
reply::Response,
};
use hyper::Body;
use std::{
io::{
BufRead,
self,
sync::Arc,
fmt,
error,
net::{
SocketAddr,
IpAddr,
},
};
use tokio::{
sync::{
RwLock,
mpsc,
Notify,
},
stream::{Stream,StreamExt,},
};
use serde::{
Serialize,
Deserialize
};
use futures::{
future::{
FutureExt,
BoxFuture,
join_all,
},
};
use lazy_static::lazy_static;
use cfg_if::cfg_if;
fn buffered_read_all_lines<T: BufRead+?Sized, F: FnMut(&str) -> io::Result<()>>(input: &mut T, mut then: F) -> io::Result<usize>
{
let mut buffer = String::new();
let mut read;
let mut total=0;
while {read = input.read_line(&mut buffer)?; read!=0} {
if buffer.trim().len() > 0 {
then(&buffer[..])?;
macro_rules! if_debug {
($($tt:tt)*) => {
cfg_if::cfg_if!{
if #[cfg(debug_assertions)] {
$($tt)*
}
}
buffer.clear();
total += read;
}
Ok(total)
}
fn main() {
let stdin = io::stdin();
let mut stdin = stdin.lock();
let mut chain = Chain::new();
macro_rules! status {
($code:expr) => {
::warp::http::status::StatusCode::from_u16($code).unwrap()
};
}
buffered_read_all_lines(&mut stdin, |string| {
chain.feed(&string.split_whitespace()
.filter(|word| !word.is_empty())
.map(|s| s.to_owned()).collect::<Vec<_>>());
Ok(())
}).expect("Failed to read from stdin");
if !chain.is_empty() {
if let Some(num) = std::env::args().skip(1).next() {
let sz: usize = num.parse().expect("Cannot parse number of tokens to generate");
for string in chain.str_iter_for(sz) {
println!("{}", string);
mod ext;
use ext::*;
mod util;
mod range;
mod sanitise;
mod bytes;
mod chunking;
#[cfg(feature="api")]
mod api;
#[cfg(target_family="unix")]
mod signals;
mod config;
mod msg;
mod state;
use state::State;
mod save;
mod ipfilt;
mod forwarded_list;
use forwarded_list::XForwardedFor;
mod handle;
mod feed;
mod gen;
mod sentance;
const DEFAULT_LOG_LEVEL: &str = "warn";
fn init_log()
{
let level = match std::env::var_os("RUST_LOG") {
None => {
std::env::set_var("RUST_LOG", DEFAULT_LOG_LEVEL);
std::borrow::Cow::Borrowed(std::ffi::OsStr::new(DEFAULT_LOG_LEVEL))
},
Some(w) => std::borrow::Cow::Owned(w),
};
pretty_env_logger::init();
trace!("Initialising `genmarkov` ({}) v{} with log level {:?}.\n\tMade by {} with <3.\n\tLicensed with GPL v3 or later",
std::env::args().next().unwrap(),
env!("CARGO_PKG_VERSION"),
level,
env!("CARGO_PKG_AUTHORS"));
}
#[tokio::main]
async fn main() {
init_log();
let (config, ccache) = match config::load().await {
Some(v) => {
let cache = match v.try_gen_cache() {
Ok(c) => c,
Err(e) => {
error!("Invalid config, cannot continue");
error!("{}", e);
debug!("{:?}", e);
return;
},
};
(v, cache)
},
_ => {
let cfg = config::Config::default();
#[cfg(debug_assertions)]
{
if let Err(err) = cfg.save(config::DEFAULT_FILE_LOCATION).await {
error!("Failed to create default config file: {}", err);
}
}
let cache= cfg.try_gen_cache().unwrap();
(cfg, cache)
},
};
debug!("Using config {:?}", config);
trace!("With config cached: {:?}", ccache);
let (chain_handle, chain) = handle::spawn(match save::load(&config.file).await {
Ok(chain) => {
info!("Loaded chain from {:?}", config.file);
chain
},
Err(e) => {
warn!("Failed to load chain, creating new");
trace!("Error: {}", e);
Chain::new()
},
}, ccache.handler_settings.clone());
{
let mut tasks = Vec::<BoxFuture<'static, ()>>::new();
tasks.push(chain_handle.map(|res| res.expect("Chain handle panicked")).boxed());
let (state, chain) = {
let state = State::new(config,
ccache,
chain);
let state2 = state.clone();
let saver = tokio::spawn(save::host(Box::new(state.clone())));
let chain = warp::any().map(move || state.clone());
tasks.push(saver.map(|res| res.expect("Saver panicked")).boxed());
(state2, chain)
};
let client_ip = if state.config().trust_x_forwarded_for {
warp::header("x-forwarded-for")
.map(|ip: XForwardedFor| ip)
.and_then(|x: XForwardedFor| async move { x.into_first().ok_or_else(|| warp::reject::not_found()) })
.or(warp::filters::addr::remote()
.and_then(|x: Option<SocketAddr>| async move { x.map(|x| x.ip()).ok_or_else(|| warp::reject::not_found()) }))
.unify().boxed()
} else {
println!("{}", chain.generate_str());
warp::filters::addr::remote().and_then(|x: Option<SocketAddr>| async move {x.map(|x| x.ip()).ok_or_else(|| warp::reject::not_found())}).boxed()
};
let ipfilter = warp::any()
.and(chain)
.and(client_ip)
.and_then(|state: State, host: IpAddr| {
async move {
state.config().mask.check(&host)
.map(|ci| {
trace!("Accepting from rule {:?}", ci);
host
})
.map(move |host| (state, host))
.map_err(warp::reject::custom)
}
}).untuple_one();
let push = warp::put()
.and(warp::path("put"))
.and(ipfilter.clone())
.and(warp::body::content_length_limit(state.config().max_content_length))
.and(warp::body::stream())
.and_then(|state: State, host: IpAddr, buf| {
async move {
feed::full(&host, state, buf).await
.map(|_| warp::reply::with_status(warp::reply(), status!(201)))
.map_err(|_| warp::reject::not_found()) //(warp::reject::custom) //TODO: Recover rejection filter down below for custom error return
}
})
.recover(ipfilt::recover)
.with(warp::log("markov::put"));
cfg_if!{
if #[cfg(feature="api")] {
let api = {
let single = {
let msz = state.config().max_gen_size;
warp::post()
.and(ipfilter.clone())
.and(warp::path("single"))
.and(warp::path::param()
.map(move |sz: usize| {
if sz == 0 || (2..=msz).contains(&sz) {
Some(sz)
} else {
None
}
})
.or(warp::any().map(|| None))
.unify())
.and(warp::body::content_length_limit(state.config().max_content_length))
.and(warp::body::aggregate())
.map(|_, x, y, z| (x,y,z)).untuple_one()
.and_then(api::single)
.with(warp::log("markov::api::single"))
};
warp::path("api")
.and(single)
.recover(ipfilt::recover)
.recover(api::error::rejection)
};
}
}
}
let read = warp::get()
.and(ipfilter.clone())
.and(warp::path::param().map(|opt: usize| Some(opt))
.or(warp::path::end().map(|| Option::<usize>::None)).unify())
.and_then(|state: State, host: IpAddr, num: Option<usize>| {
async move {
let (tx, rx) = mpsc::channel(state.config().max_gen_size);
tokio::spawn(gen::body(state, num, tx));
Ok::<_, std::convert::Infallible>(Response::new(Body::wrap_stream(rx.filter_map(move |mut x| {
if x.trim_in_place().len() != 0 {
info!("{} <- {:?}", host, x);
x.push('\n');
Some(Ok::<_, std::convert::Infallible>(x))
} else {
None
}
}))))
}
})
.recover(ipfilt::recover)
.with(warp::log("markov::read"));
let sentance = warp::get()
.and(warp::path("sentance")) //TODO: sanitise::Sentance::new_iter the body line
.and(ipfilter.clone())
.and(warp::path::param().map(|opt: usize| Some(opt))
.or(warp::path::end().map(|| Option::<usize>::None)).unify())
.and_then(|state: State, host: IpAddr, num: Option<usize>| {
async move {
let (tx, rx) = mpsc::channel(state.config().max_gen_size);
tokio::spawn(sentance::body(state, num, tx));
Ok::<_, std::convert::Infallible>(Response::new(Body::wrap_stream(rx.filter_map(move |mut x| {
if x.trim_in_place().len() != 0 {
info!("{} (sentance) <- {:?}", host, x);
x.push(' ');
Some(Ok::<_, std::convert::Infallible>(x))
} else {
None
}
}))))
}
})
.recover(ipfilt::recover)
.with(warp::log("markov::read::sentance"));
let read = warp::path("get").and(read.or(sentance));
#[cfg(feature="api")]
let read = read.or(api);
#[cfg(target_family="unix")]
tasks.push(tokio::spawn(signals::handle(state.clone())).map(|res| res.expect("Signal handler panicked")).boxed());
require_impl!(Send: async {
let (server, init) = {
let s2 = AssertNotSend::new(state.clone()); //temp clone the Arcs here for shutdown if server fails to bind, assert they cannot remain cloned across an await boundary.
match bind::try_serve(warp::serve(push
.or(read)),
state.config().bindpoint.clone(),
async move {
tokio::signal::ctrl_c().await.unwrap();
state.shutdown();
}) {
Ok((addr, server)) => {
info!("Server bound on {:?}", addr);
(server, s2.into_inner().into_initialiser())
},
Err(err) => {
error!("Failed to bind server: {}", err);
s2.into_inner().shutdown();
return;
},
}
};
tokio::join![
server,
async move {
cfg_if! {
if #[cfg(feature="instant-init")] {
trace!("Setting init");
} else {
trace!("Setting init in 2 seconds for good measure.");
tokio::time::delay_for(tokio::time::Duration::from_secs(2)).await;
}
}
init.set().expect("Failed to initialise saver")
},
];
}).await;
// Cleanup
async move {
trace!("Cleanup");
debug!("Waiting on {} tasks now", tasks.len());
join_all(tasks).await;
}
}.await;
info!("Shut down gracefully")
}
mod bind;

@ -0,0 +1,210 @@
//! Message passing things
use super::*;
use tokio::{
sync::{
watch,
Mutex,
},
};
use std::{
task::{Poll, Context},
pin::Pin,
fmt,
error,
};
use futures::{
future::{
Future,
},
};
#[derive(Debug)]
pub struct InitError;
#[derive(Debug)]
pub struct InitWaitError;
impl error::Error for InitError{}
impl fmt::Display for InitError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "failed to set init value")
}
}
impl error::Error for InitWaitError{}
impl fmt::Display for InitWaitError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "failed to receive init value")
}
}
/// Provides a method of waiting on and setting a single initialisation.
///
/// In general, it should only be set once, as multiple sets do nothing but hog `Arc`s.
/// Dropping the `Initialiser` after waiting or setting should generally be done immediately.
/// Choose the `into_wait()` and `set()` varients over the non-consuming ones.
#[derive(Clone, Debug)]
pub struct Initialiser
{
tx: Arc<watch::Sender<bool>>,
rx: watch::Receiver<bool>
}
impl Initialiser
{
/// Create a new, unset initialiser
pub fn new() -> Self
{
let (tx, rx) = watch::channel(false);
Self {
tx: Arc::new(tx),
rx,
}
}
/// Create a pre-set initialiser. Calls to `wait()` will immediately resolve.
pub fn new_set() -> Self
{
let (tx, rx) = watch::channel(true);
Self {
tx: Arc::new(tx),
rx,
}
}
/// Consume into a future that completes when init is set.
pub fn into_wait(self) -> impl Future<Output=Result<(), InitWaitError>> + 'static
{
let mut rx = self.rx;
async move {
if !*rx.borrow() {
while !rx.recv().await.ok_or_else(|| InitWaitError)? {
//tokio::task::yield_now().await;
}
Ok(())
} else {
Ok(())
}
}
}
/// Clone into a future that completes when init is set.
///
/// This method does not clone any `Arc`s and is prefered to `self.clone().into_wait()`.
/// Use this when the `Initialiser` you want to wait on is behind a shared reference.
pub fn clone_into_wait(&self) -> impl Future<Output=Result<(), InitWaitError>> + 'static
{
let mut rx = self.rx.clone();
async move {
if !*rx.borrow() {
while !rx.recv().await.ok_or_else(|| InitWaitError)? {
//tokio::task::yield_now().await;
}
Ok(())
} else {
Ok(())
}
}
}
/// Completes when init is set
pub async fn wait(&mut self) -> Result<(), InitWaitError>
{
if !*self.rx.borrow() {
while !self.rx.recv().await.ok_or_else(|| InitWaitError)? {
//tokio::task::yield_now().await;
}
Ok(())
} else {
Ok(())
}
}
/// Is init set?
pub fn is_set(&self) -> bool
{
*self.rx.borrow()
}
/// Consume and set init if it's not already set
pub fn set(self) -> Result<(), InitError>
{
if !*self.rx.borrow() {
self.tx.broadcast(true).map_err(|_| InitError)
} else {
Ok(())
}
}
/// Set init without consuming.
///
/// # Note
/// It is prefered to use `set()`, as this method may make `Arc`s hang around longer than they need to.
/// Calling this multiple times is useless.
pub fn set_in_place(&self) -> Result<(), InitError>
{
if !*self.rx.borrow() {
self.tx.broadcast(true).map_err(|_| InitError)
} else {
Ok(())
}
}
}
impl Future for Initialiser
{
type Output = Result<(), InitWaitError>;
fn poll(mut self: Pin<&mut Self>, cx: &mut Context<'_>) -> Poll<Self::Output> {
let uhh = self.wait();
tokio::pin!(uhh);
uhh.poll(cx)
}
}
/// A value that can be consumed once.
#[derive(Debug)]
pub struct Once<T>(Mutex<Option<T>>);
impl<T> Once<T>
{
/// Create a new instance
pub fn new(from: T) -> Self
{
Self(Mutex::new(Some(from)))
}
/// Consume into the instance from behind a potentially shared reference.
pub async fn consume_shared(self: Arc<Self>) -> Option<T>
{
match Arc::try_unwrap(self) {
Ok(x) => x.0.into_inner(),
Err(x) => x.0.lock().await.take(),
}
}
/// Consume from a shared reference and panic if the value has already been consumed.
pub async fn unwrap_shared(self: Arc<Self>) -> T
{
self.consume_shared().await.unwrap()
}
/// Consume into the instance.
pub async fn consume(&self) -> Option<T>
{
self.0.lock().await.take()
}
/// Consume and panic if the value has already been consumed.
pub async fn unwrap(&self) -> T
{
self.consume().await.unwrap()
}
/// Consume into the inner value
pub fn into_inner(self) -> Option<T>
{
self.0.into_inner()
}
}

@ -0,0 +1,296 @@
//! Workarounds for ridiculously janky `std::ops::Range*` polymorphism
use super::*;
use std::{
ops::{
Range,
RangeFrom,
RangeInclusive,
RangeTo,
RangeToInclusive,
RangeFull,
Bound,
RangeBounds,
},
str::{
FromStr,
},
fmt,
error,
};
#[derive(Debug, Clone, PartialEq, Eq, Hash)]
pub enum DynRange<T>
{
Range(Range<T>),
From(RangeFrom<T>),
Inclusive(RangeInclusive<T>),
To(RangeTo<T>),
ToInclusive(RangeToInclusive<T>),
Full(RangeFull),
}
#[macro_export] macro_rules! impl_from {
(Full, RangeFull) => {
impl<T> From<RangeFull> for DynRange<T>
{
#[inline] fn from(from: RangeFull) -> Self
{
Self::Full(from)
}
}
};
($name:ident, $range:tt) => {
impl<T> From<$range <T>> for DynRange<T>
{
#[inline] fn from(from: $range<T>) -> Self
{
Self::$name(from)
}
}
};
}
impl_from!(Range, Range);
impl_from!(From, RangeFrom);
impl_from!(Inclusive, RangeInclusive);
impl_from!(To, RangeTo);
impl_from!(ToInclusive, RangeToInclusive);
impl_from!(Full, RangeFull);
macro_rules! bounds {
($self:ident, $bound:ident) => {
match $self {
DynRange::Range(from) => from.$bound(),
DynRange::From(from) => from.$bound(),
DynRange::Inclusive(i) => i.$bound(),
DynRange::To(i) => i.$bound(),
DynRange::ToInclusive(i) => i.$bound(),
DynRange::Full(_) => (..).$bound(),
}
};
}
impl<T> RangeBounds<T> for DynRange<T>
{
fn start_bound(&self) -> Bound<&T> {
bounds!(self, start_bound)
}
fn end_bound(&self) -> Bound<&T> {
bounds!(self, end_bound)
}
}
impl<'a, T> RangeBounds<T> for &'a DynRange<T>
{
fn start_bound(&self) -> Bound<&T> {
bounds!(self, start_bound)
}
fn end_bound(&self) -> Bound<&T> {
bounds!(self, end_bound)
}
}
impl<T: fmt::Display> fmt::Display for DynRange<T>
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
match self {
Self::Range(from) => write!(f, "{}..{}", from.start, from.end),
Self::From(from) => write!(f, "{}..", from.start),
Self::Inclusive(from) => write!(f, "{}..={}", from.start(), from.end()),
Self::To(from) => write!(f, "..{}", from.end),
Self::ToInclusive(from) => write!(f, "..={}", from.end),
Self::Full(_) => write!(f, ".."),
}
}
}
use std::any::{
Any,
};
impl<T: 'static> DynRange<T>
{
#[inline]
pub fn into_boxed(self) -> Box<dyn Any /*TODO: + Send + Sync */+ 'static>
{
self.into_inner()
}
fn into_inner(self) -> Box<dyn Any + 'static>
{
match self {
Self::Range(from) => Box::new(from),
Self::From(from) => Box::new(from),
Self::Inclusive(from) => Box::new(from),
Self::To(from) => Box::new(from),
Self::ToInclusive(from) => Box::new(from),
Self::Full(_) => Box::new(..),
}
}
fn inner_mut(&mut self) -> &mut dyn Any
{
match self {
Self::Range(from) => from,
Self::From(from) => from,
Self::Inclusive(from) => from,
Self::To(from) => from,
Self::ToInclusive(from) => from,
Self::Full(f) => f,
}
}
fn inner_ref(&self) -> &dyn Any
{
match self {
Self::Range(from) => from,
Self::From(from) => from,
Self::Inclusive(from) => from,
Self::To(from) => from,
Self::ToInclusive(from) => from,
Self::Full(_) => &(..),
}
}
pub fn downcast_ref<R: RangeBounds<T> + 'static>(&self) -> Option<&R>
{
self.inner_ref().downcast_ref()
}
pub fn downcast_mut<R: RangeBounds<T> + 'static>(&mut self) -> Option<&mut R>
{
self.inner_mut().downcast_mut()
}
pub fn downcast<R: RangeBounds<T> + 'static>(self) -> Result<R, Self>
{
self.into_inner().downcast::<R>()
.map(|x| *x)
.map_err(|b| {
todo!("make this bullshit properly unboxable ehh...")
})
//Box::<(dyn std::any::Any + 'static)>::downcast(Box::new(self)).map_ok(|ok| *ok)
}
}
#[derive(Debug)]
pub struct ParseError(DynRange<()>, Option<Box<dyn error::Error+'static>>);
impl ParseError
{
fn new<R: Into<DynRange<()>>>(which: R, err: impl error::Error + 'static) -> Self
{
Self(which.into(), Some(Box::new(err)))
}
fn none(which: impl Into<DynRange<()>>) -> Self
{
Self(which.into(), None)
}
fn map<T: Into<DynRange<()>>>(self, to: T) -> Self
{
Self (to.into(), self.1)
}
}
impl error::Error for ParseError
{
fn source(&self) -> Option<&(dyn error::Error + 'static)> {
if let Some(this) = self.1.as_ref() {
Some(this.as_ref())
} else {
None
}
}
}
impl fmt::Display for ParseError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "failed to parse range in format `{:?}`", self.0)?;
if let Some(this) = self.1.as_ref() {
write!(f, ": {}", this)?;
}
Ok(())
}
}
impl<T: FromStr> FromStr for DynRange<T>
where T::Err: error::Error + 'static
{
type Err = ParseError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s== ".." {
Ok(Self::Full(..))
} else if s.starts_with("..=") {
Ok(Self::ToInclusive(..=T::from_str(&s[3..]).map_err(|x| ParseError::new(..=(), x))?))
} else if s.starts_with("..") {
Ok(Self::To(..(T::from_str(&s[2..])).map_err(|x| ParseError::new(..(), x))?))
} else if s.ends_with("..") {
Ok(Self::From(T::from_str(&s[..s.len()-2]).map_err(|x| ParseError::new(().., x))?..))
} else {
fn try_next_incl<'a, T: FromStr>(m: &mut impl Iterator<Item=&'a str>) -> Result<RangeInclusive<T>, ParseError>
where T::Err: error::Error + 'static
{
let (first, second) = if let Some(first) = m.next() {
if let Some(seocond) = m.next() {
(first,seocond)
} else {
return Err(ParseError::none(()..=()));
}
} else {
return Err(ParseError::none(()..=()));
};
let first: T = first.parse().map_err(|x| ParseError::new(()..=(), x))?;
let second: T = second.parse().map_err(|x| ParseError::new(()..=(), x))?;
Ok(first..=second)
}
fn try_next<'a, T: FromStr>(m: &mut impl Iterator<Item=&'a str>) -> Result<Range<T>, ParseError>
where T::Err: error::Error + 'static
{
let (first, second) = if let Some(first) = m.next() {
if let Some(seocond) = m.next() {
(first,seocond)
} else {
return Err(ParseError::none(()..()));
}
} else {
return Err(ParseError::none(()..()));
};
let first: T = first.parse().map_err(|x| ParseError::new(()..(), x))?;
let second: T = second.parse().map_err(|x| ParseError::new(()..(), x))?;
Ok(first..second)
}
let mut split = s.split("..=").fuse();
let mut last_err = ParseError::none(()..());
match loop {
match try_next_incl(&mut split) {
Err(ParseError(_, None)) => break Err(last_err), // iter empty
Err(other) => last_err = other,
Ok(value) => break Ok(Self::Inclusive(value)),
}
} {
Ok(v) => return Ok(v),
Err(e) => last_err = e,
};
let mut split = s.split("..").fuse();
match loop {
match try_next(&mut split) {
Err(ParseError(_, None)) => break Err(last_err), // iter empty
Err(other) => last_err = other,
Ok(value) => break Ok(Self::Range(value)),
}
} {
Ok(v) => Ok(v),
Err(e) => Err(e),
}
}
}
}

@ -0,0 +1,277 @@
//! Filter out characters and such
use smallmap::Map as SmallMap;
use std::{
borrow::Cow,
fmt,
iter::{
self,
FromIterator,
},
str,
};
use once_cell::sync::OnceCell;
#[derive(Debug, Clone, PartialEq, Eq)]
pub struct Filter(SmallMap<char, ()>);
/*
impl<const N: usize> From<[char; N]> for Filter
{
fn from(from: [char; N]) -> Self
{
let mut map = SmallMap::with_capacity(1 + (N / 256));
for &chr in from.iter()
{
map.insert(chr, ());
}
Self(map)
}
}*/
impl<'a> From<&'a [char]> for Filter
{
fn from(from: &'a [char]) -> Self
{
let mut map = SmallMap::new();
for &chr in from.iter()
{
map.insert(chr, ());
}
Self(map)
}
}
impl<'a> From<&'a str> for Filter
{
fn from(from: &'a str) -> Self
{
let mut output = Self::new();
output.insert(from.chars());
output
}
}
impl str::FromStr for Filter
{
type Err = std::convert::Infallible;
fn from_str(s: &str) -> Result<Self, Self::Err> {
Ok(Self::from(s))
}
}
impl fmt::Display for Filter
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
use std::fmt::Write;
for chr in self.iter()
{
f.write_char(chr)?;
}
Ok(())
}
}
pub struct FilterKeyIter<'a>(smallmap::iter::Iter<'a, char, ()>, usize);
impl<'a> Iterator for FilterKeyIter<'a>
{
type Item = char;
fn next(&mut self) -> Option<Self::Item>
{
self.0.next().map(|&(x, _)| x)
}
fn size_hint(&self) -> (usize, Option<usize>) {
(self.1, Some(self.1))
}
}
impl<'a> iter::FusedIterator for FilterKeyIter<'a>{}
impl<'a> iter::ExactSizeIterator for FilterKeyIter<'a>{}
impl Filter
{
pub fn new() -> Self
{
Self(SmallMap::new())
}
pub fn insert<I: IntoIterator<Item=char>>(&mut self, from: I)
{
for from in from.into_iter()
{
self.0.insert(from, ());
}
}
pub fn remove<I: IntoIterator<Item=char>>(&mut self, from: I)
{
for from in from.into_iter()
{
self.0.remove(&from);
}
}
pub fn len(&self) -> usize
{
self.0.len()
}
pub fn is_empty(&self) -> bool
{
//TODO: impl this in smallmap itself
self.len() == 0
}
pub fn iter(&self) -> FilterKeyIter<'_> //impl Iterator<Item=char> + '_
{
//self.0.iter()
// .copied()
// .map(|(x, _)| x)
FilterKeyIter(self.0.iter(), self.0.len())
}
/// Should this character be filtered?
#[inline] pub fn check(&self, chr: char) -> bool
{
self.0.get(&chr).is_some()
}
pub fn filter_owned(&self, input: impl Into<String>) -> String
{
let mut input = input.into();
self.filter(&mut input);
input
}
pub fn filter<'a>(&self, output: &'a mut String) -> &'a mut String
{
if self.is_empty() {
return output;
}
output.retain(|chr| !self.check(chr));
output
}
pub fn filter_iter<'a, I: IntoIterator<Item=char>>(&'a self, from_iter: I) -> FilterIter<'a, I::IntoIter>
where I::IntoIter: 'a
{
FilterIter(&self, from_iter.into_iter().fuse())
}
pub fn filter_cow<'a>(&self, string: &'a (impl AsRef<str> + 'a + ?Sized)) -> Cow<'a, str>
{
let string = string.as_ref();
if self.is_empty() {
return Cow::Borrowed(string);
}
let mut output = Cow::Borrowed(string);
let mut i=0;
for chr in string.chars()
{
if self.check(chr) {
output.to_mut().remove(i);
} else {
i+=1;
}
}
output
}
pub fn filter_str<'a, T: AsRef<str>+'a +?Sized>(&'a self, string: &'a T) -> FilterStr<'a>
{
FilterStr(string.as_ref(), self, OnceCell::new())
}
}
impl FromIterator<char> for Filter
{
fn from_iter<I: IntoIterator<Item=char>>(iter: I) -> Self
{
let mut output= Self::new();
output.insert(iter);
output
}
}
impl<'a> FilterStr<'a>
{
pub fn as_str(&self) -> &str
{
fn fmt(this: &FilterStr<'_>) -> String
{
let chars = this.0.chars();
let mut f: String = crate::util::hint_cap(&chars);
for chr in chars {
if !this.1.check(chr) {
f.push(chr);
}
}
f
}
&self.2.get_or_init(|| fmt(&self))[..]
}
}
pub struct FilterStr<'a>(&'a str, &'a Filter, OnceCell<String>);
impl<'a> fmt::Display for FilterStr<'a>
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "{}", self.as_str())
}
}
impl<'a> FilterStr<'a>
{
pub fn filter(&self) -> &Filter
{
&self.1
}
}
pub struct FilterIter<'a, I>(&'a Filter, iter::Fuse<I>);
impl<'a, I: Iterator<Item=char>> Iterator for FilterIter<'a, I>
{
type Item = char;
fn next(&mut self) -> Option<Self::Item>
{
loop {
break match self.1.next() {
Some(chr) if !self.0.check(chr) => Some(chr),
None => None,
_ => continue,
}
}
}
fn size_hint(&self) -> (usize, Option<usize>) {
let (_, high) = self.1.size_hint();
(0, high)
}
}
impl<'a, I> FilterIter<'a, I>
{
pub fn filter(&self) -> &Filter
{
self.0
}
}
impl<'a, I: Iterator<Item=char>> iter::FusedIterator for FilterIter<'a, I>{}
#[cfg(test)]
mod tests
{
use super::*;
#[test]
fn filter_cow()
{
let filter: Filter = " hi".chars().collect();
let string = "abcdef ghi jk1\nhian";
assert_eq!(filter.filter_str(&string).to_string(), filter.filter_cow(&string).to_string());
assert_eq!(filter.filter_cow(&string).to_string(), filter.filter_iter(string.chars()).collect::<String>());
}
}

@ -0,0 +1,76 @@
//! Sanitisers
use super::*;
use std::{
error,
fmt,
};
mod sentance;
pub use sentance::*;
mod word;
pub use word::*;
pub mod filter;
/*
pub fn take_sentance<T: AsyncBufRead+ ?Sized + Unpin, U: AsyncWrite + ?Sized + Unpin>(from: &mut T, to: &mut U) -> Result<usize, Error>
{
todo!()
}*/
#[derive(Debug)]
pub enum Error {
Word(WordError),
Sentance(SentanceError),
}
impl error::Error for Error{}
impl fmt::Display for Error
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
match self {
Self::Word(_) => write!(f, "couldn't extract word"),
Self::Sentance(_) => write!(f, "couldn't extract sentance"),
}
}
}
impl From<WordError> for Error
{
#[inline] fn from(from: WordError) -> Self
{
Self::Word(from)
}
}
impl From<SentanceError> for Error
{
#[inline] fn from(from: SentanceError) -> Self
{
Self::Sentance(from)
}
}
#[cfg(test)]
mod tests
{
use super::*;
#[test]
fn sentance()
{
let string = r#"Hello world.
I am a string, that is a string. Strings, I love them!!!
Owo uwu"#;
let sentances = Sentance::new_iter(string);
for sentance in sentances {
let words = Word::new(sentance);
println!("Word in {:?} -> {:?}", sentance, words);
}
}
}

@ -0,0 +1,146 @@
//! Sentance splitting
use super::*;
use std::{
borrow::{
Borrow,
ToOwned,
},
ops::{
Deref,DerefMut,
},
};
#[derive(Debug)]
pub struct SentanceError;
/// A sentence
#[derive(Debug, PartialEq, Eq)]
#[repr(transparent)]
pub struct Sentance(str);
macro_rules! new {
($str:expr) => {
unsafe {Sentance::new_unchecked($str)}
};
}
const DEFAULT_BOUNDARIES: &[char] = &['\n', '.', ':', '!', '?', '~'];
lazy_static! {
static ref BOUNDARIES: smallmap::Map<char, ()> = {
let mut map = smallmap::Map::new();
for &chr in DEFAULT_BOUNDARIES.iter() {
map.insert(chr, ());
}
map
};
}
#[inline] pub fn is_sentance_boundary(chr: char) -> bool
{
BOUNDARIES.contains_key(&chr)
}
impl Sentance
{
/// Create a new word reference without checking for sentance boundaries
pub unsafe fn new_unchecked<'a>(from: &'a str) -> &'a Self
{
std::mem::transmute(from)
}
/// Create a single sentance
pub fn single<'a>(from: &'a (impl AsRef<str> + 'a + ?Sized)) -> Result<&'a Self, SentanceError>
{
let from = from.as_ref();
match from.find(is_sentance_boundary) {
Some(_) => Err(SentanceError),
_ => Ok(new!(from)),
}
}
/// Create a new section of sentances from this string
#[inline] pub fn new<'a>(from: &'a (impl AsRef<str> + 'a + ?Sized)) -> Vec<&'a Self>
{
Self::new_iter(from)
.collect()
}
/// Create a new iterator over sentances from this string.
pub fn new_iter<'a>(from: &'a (impl AsRef<str> +'a + ?Sized)) -> impl Iterator<Item = &'a Self> + Clone
{
let from = from.as_ref();
from.split_inclusive(is_sentance_boundary)
.map(|x| new!(x.trim()))
.filter(|x| !x.is_empty())
}
/// Get the words in this sentance
#[inline] pub fn words(&self) -> impl Iterator<Item = &'_ Word>
{
Word::new_iter(self)
}
}
impl<'a> From<&'a str> for &'a Sentance
{
fn from(from: &'a str) -> Self
{
new!(from)
}
}
impl AsRef<str> for Sentance
{
fn as_ref(&self) -> &str
{
&self.0
}
}
impl AsRef<Sentance> for str
{
fn as_ref(&self) -> &Sentance
{
new!(self)
}
}
impl Borrow<Sentance> for String
{
fn borrow(&self) -> &Sentance {
new!(&self[..])
}
}
impl ToOwned for Sentance
{
type Owned = String;
fn to_owned(&self) -> Self::Owned {
self.0.to_owned()
}
}
impl Deref for Sentance
{
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl DerefMut for Sentance
{
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl AsRef<Sentance> for Sentance
{
#[inline] fn as_ref(&self) -> &Sentance
{
self
}
}

@ -0,0 +1,150 @@
//! Word splitting
use super::*;
use std::{
borrow::{
Borrow,
ToOwned,
},
ops::{
Deref,DerefMut,
},
};
#[derive(Debug)]
pub struct WordError;
/// A word is a non-whitespace containing string representing part of a sentance
#[derive(Debug, PartialEq, Eq)]
#[repr(transparent)]
pub struct Word(str);
macro_rules! new {
($str:expr) => {
unsafe {Word::new_unchecked($str)}
};
}
const DEFAULT_BOUNDARIES: &[char] = &['!', '.', ',', '*'];
lazy_static! {
static ref BOUNDARIES: smallmap::Map<char, ()> = {
let mut map = smallmap::Map::new();
for &chr in DEFAULT_BOUNDARIES.iter() {
map.insert(chr, ());
}
map
};
}
#[inline] pub fn is_word_boundary(chr: char) -> bool
{
chr.is_whitespace() || BOUNDARIES.contains_key(&chr)
}
impl Word
{
/// Create a new word reference without checking for whitespace
pub unsafe fn new_unchecked<'a>(from: &'a str) -> &'a Self
{
std::mem::transmute(from)
}
/// Create a single word
pub fn single<'a>(from: &'a (impl AsRef<Sentance> +?Sized +'a)) -> Result<&'a Self, WordError>
{
let from = from.as_ref();
match from.find(is_word_boundary) {
Some(_) => Err(WordError),
_ => Ok(new!(from)),
}
}
/// Create a new section of words from this sentance
pub fn new<'a>(from: &'a (impl AsRef<Sentance> +?Sized+'a)) -> Vec<&'a Self>
{
Self::new_iter(from)
.collect()
}
/// Create a new iterator over words from this sentance.
pub fn new_iter<'a, 'b>(from: &'a (impl AsRef<Sentance> +?Sized+'b)) -> impl Iterator<Item = &'a Self>
where 'b: 'a
{
let from = from.as_ref();
from.split_inclusive(is_word_boundary)
.map(|x| x.trim())
.filter(|x| !x.is_empty())
.map(|x| new!(x))
}
}
impl<'a> From<&'a str> for &'a Word
{
fn from(from: &'a str) -> Self
{
new!(from)
}
}
impl AsRef<str> for Word
{
fn as_ref(&self) -> &str
{
&self.0
}
}
impl AsRef<Word> for str
{
fn as_ref(&self) -> &Word
{
new!(self)
}
}
impl Borrow<Word> for String
{
fn borrow(&self) -> &Word {
new!(&self[..])
}
}
impl ToOwned for Word
{
type Owned = String;
fn to_owned(&self) -> Self::Owned {
self.0.to_owned()
}
}
impl Deref for Word
{
type Target = str;
fn deref(&self) -> &Self::Target {
&self.0
}
}
impl DerefMut for Word
{
fn deref_mut(&mut self) -> &mut Self::Target {
&mut self.0
}
}
impl AsRef<Word> for Word
{
#[inline] fn as_ref(&self) -> &Word
{
self
}
}
pub fn words(input: &str) -> impl Iterator<Item=&'_ Word>
{
input.split_inclusive(is_word_boundary)
.map(|x| x.trim())
.filter(|x| !x.is_empty())
.map(|x| new!(x))
}

@ -0,0 +1,132 @@
//! Saving and loading chain
use super::*;
use std::{
sync::Arc,
path::{
Path,
},
io,
};
use tokio::{
time::{
self,
Duration,
},
fs::{
OpenOptions,
},
prelude::*,
};
use futures::{
future::{
OptionFuture,
},
};
#[cfg(feature="compress-chain")]
use async_compression::{
tokio_02::{
write::{
BzEncoder,
BzDecoder,
},
},
};
const SAVE_INTERVAL: Option<Duration> = Some(Duration::from_secs(2));
#[cfg(feature="compress-chain")]
type Compressor<T> = BzEncoder<T>;
#[cfg(feature="compress-chain")]
type Decompressor<T> = BzDecoder<T>;
pub async fn save_now(state: &State) -> io::Result<()>
{
let chain = state.chain_ref().read().await;
use std::ops::Deref;
let to = &state.config().file;
save_now_to(chain.deref(),to).await
}
async fn save_now_to(chain: &Chain<String>, to: impl AsRef<Path>) -> io::Result<()>
{
debug!("Saving chain to {:?}", to.as_ref());
let mut file = OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(to).await?;
let chain = serde_cbor::to_vec(chain).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))?;
{
#[cfg(feature="compress-chain")]
let mut file = Compressor::new(&mut file);
file.write_all(&chain[..]).await?;
#[cfg(feature="compress-chain")]
file.flush().await?;
#[cfg(feature="compress-chain")]
file.shutdown().await?;
}
file.flush().await?;
file.shutdown().await?;
Ok(())
}
/// Start the save loop for this chain
pub async fn host(mut state: Box<State>)
{
let to = state.config().file.to_owned();
let interval = state.config().save_interval();
let when = Arc::clone(state.when_ref());
trace!("Setup oke. Waiting on init");
if state.on_init().await.is_ok() {
debug!("Begin save handler");
while Arc::strong_count(&when) > 1 {
{
let chain = state.chain_ref().read().await;
use std::ops::Deref;
if let Err(e) = save_now_to(chain.deref(), &to).await {
error!("Failed to save chain: {}", e);
} else {
info!("Saved chain to {:?}", to);
}
}
tokio::select!{
_ = OptionFuture::from(interval.map(|interval| time::delay_for(interval))) => {},
_ = state.on_shutdown() => {
break;
}
}
when.notified().await;
if state.has_shutdown() {
break;
}
}
} else {
debug!("Shutdown called before init");
}
trace!("Saver exiting");
}
/// Try to load a chain from this path
pub async fn load(from: impl AsRef<Path>) -> io::Result<Chain<String>>
{
debug!("Loading chain from {:?}", from.as_ref());
#[allow(unused_mut)]
let mut file = OpenOptions::new()
.read(true)
.open(from).await?;
#[allow(unused_mut)]
let mut whole = Vec::new();
#[cfg(feature="compress-chain")]
let mut whole = Decompressor::new(whole);
tokio::io::copy(&mut file, &mut whole).await?;
whole.flush().await?;
#[cfg(feature="compress-chain")]
whole.shutdown().await?;
#[cfg(feature="compress-chain")]
let whole = whole.into_inner();
serde_cbor::from_slice(&whole[..])
.map_err(|e| io::Error::new(io::ErrorKind::InvalidInput, e))
}

@ -0,0 +1,36 @@
//! /sentance/
use super::*;
use futures::StreamExt;
pub async fn body(state: State, num: Option<usize>, mut output: mpsc::Sender<String>) -> Result<(), gen::GenBodyError>
{
let string = {
let mut chain = state.chain_read();
match num {
None => chain.next().await.ok_or_else(gen::GenBodyError::default)?,
Some(num) if num < state.config().max_gen_size => {//(0..num).map(|_| chain.generate_str()).join("\n"),
let chain = chain.take(num);
chain.collect::<Vec<_>>().await.join("\n")//TODO: Stream version of JoinStrExt
},
_ => return Err(Default::default()),
}
};
debug!("Taking {:?} from {:?}" ,num, string);
let filter = state.outbound_filter();
if let Some(num) = num {
for sen in sanitise::Sentance::new_iter(&string).take(num)
{
output.send(filter.filter_owned(sen.to_owned())).await?;
}
} else {
output.send(filter.filter_owned(match sanitise::Sentance::new_iter(&string)
.max_by_key(|x| x.len()) {
Some(x) => x,
/*#[cold]*/ None => return Ok(()),
}.to_owned())).await?;
}
Ok(())
}

@ -0,0 +1,71 @@
//! Unix signals
use super::*;
use tokio::{
signal::unix::{
self,
SignalKind,
},
};
pub async fn handle(mut state: State)
{
let mut usr1 = unix::signal(SignalKind::user_defined1()).expect("Failed to hook SIGUSR1");
let mut usr2 = unix::signal(SignalKind::user_defined2()).expect("Failed to hook SIGUSR2");
let mut quit = unix::signal(SignalKind::quit()).expect("Failed to hook SIGQUIT");
let mut io = unix::signal(SignalKind::io()).expect("Failed to hook IO");
trace!("Setup oke. Waiting on init");
if state.on_init().await.is_ok() {
debug!("Begin signal handler");
loop {
tokio::select! {
_ = state.on_shutdown() => {
break;
}
_ = usr1.recv() => {
info!("Got SIGUSR1. Causing chain write.");
state.push_now();
},
_ = usr2.recv() => {
info!("Got SIGUSR2. Loading chain immediately.");
match save::load(&state.config().file).await {
Ok(new) => {
{
let mut chain = state.chain_ref().write().await;
*chain = new;
}
trace!("Replaced with read chain");
},
Err(e) => {
error!("Failed to load chain from file, keeping current: {}", e);
},
}
},
_ = io.recv() => {
info!("Got SIGIO. Saving chain immediately.");
if let Err(e) = save::save_now(&state).await {
error!("Failed to save chain: {}", e);
} else{
trace!("Saved chain okay");
}
},
_ = quit.recv() => {
warn!("Got SIGQUIT. Saving chain then aborting.");
if let Err(e) = save::save_now(&state).await {
error!("Failed to save chain: {}", e);
} else{
trace!("Saved chain okay.");
}
error!("Aborting");
std::process::abort()
},
}
}
} else {
debug!("Shutdown called before init()");
}
trace!("Exiting");
}

@ -0,0 +1,161 @@
//! State
use super::*;
use tokio::{
sync::{
watch,
mpsc::error::SendError,
},
};
use config::Config;
use msg::Initialiser;
#[derive(Debug)]
pub struct ShutdownError;
impl error::Error for ShutdownError{}
impl fmt::Display for ShutdownError
{
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result
{
write!(f, "shutdown signal caught")
}
}
#[derive(Debug, Clone)]
pub struct State
{
config: Arc<Box<(Config, config::Cache)>>, //to avoid cloning config
chain: handle::ChainHandle<String>,
//save: Arc<Notify>,
begin: Initialiser,
shutdown: Arc<watch::Sender<bool>>,
shutdown_recv: watch::Receiver<bool>,
}
impl State
{
/// Consume this `state` into its initialiser
pub fn into_initialiser(self) -> Initialiser
{
self.begin
}
/// Allow the saver task to start work
pub fn init(self) -> Result<(), msg::InitError>
{
self.begin.set()
}
/// Has `init` been called?
pub fn is_init(&self) -> bool
{
self.begin.is_set()
}
/// A future that completes either when `init` is called, or `shutdown`.
pub async fn on_init(&mut self) -> Result<(), ShutdownError>
{
if self.has_shutdown() {
return Err(ShutdownError);
}
tokio::select! {
Ok(()) = self.begin.clone_into_wait() => Ok(()),
_ = self.on_shutdown() => {
debug!("on_init(): shutdown received");
Err(ShutdownError)
}
else => Err(ShutdownError)
}
}
pub fn inbound_filter(&self) -> &sanitise::filter::Filter
{
&self.config_cache().inbound_filter
}
pub fn outbound_filter(&self) -> &sanitise::filter::Filter
{
&self.config_cache().outbound_filter
}
pub fn new(config: Config, cache: config::Cache, chain: handle::ChainHandle<String>) -> Self
{
let (shutdown, shutdown_recv) = watch::channel(false);
Self {
config: Arc::new(Box::new((config, cache))),
chain,
begin: Initialiser::new(),
shutdown: Arc::new(shutdown),
shutdown_recv,
}
}
pub fn config(&self) -> &Config
{
&self.config.as_ref().0
}
pub fn config_cache(&self) -> &config::Cache
{
&self.config.as_ref().1
}
/*pub fn notify_save(&self)
{
self.save.notify();
}*/
/*pub fn chain(&self) -> &RwLock<Chain<String>>
{
&self.chain.as_ref()
}*/
pub fn chain_ref(&self) -> &RwLock<Chain<String>>
{
&self.chain.chain_ref()
}
pub fn chain_read(&self) -> handle::ChainStream<String>
{
self.chain.read()
}
/// Write to this chain
pub async fn chain_write<'a, T: Stream<Item = String>>(&'a self, buffer: T) -> Result<(), SendError<Vec<String>>>
{
self.chain.write_stream(buffer).await
}
pub fn when_ref(&self) -> &Arc<Notify>
{
&self.chain.notify_when()
}
/// Force the chain to push through now
pub fn push_now(&self)
{
self.chain.push_now()
}
pub fn shutdown(self)
{
self.shutdown.broadcast(true).expect("Failed to communicate shutdown");
self.chain.hang();
self.when_ref().notify();
}
pub fn has_shutdown(&self) -> bool
{
*self.shutdown_recv.borrow()
}
pub async fn on_shutdown(&mut self)
{
if !self.has_shutdown() {
while let Some(false) = self.shutdown_recv.recv().await {
}
}
}
}

@ -0,0 +1,92 @@
//! Utils
pub trait NewCapacity: Sized
{
fn new() -> Self;
fn with_capacity(cap: usize) -> Self;
}
impl NewCapacity for String
{
fn new() -> Self
{
Self::new()
}
fn with_capacity(cap: usize) -> Self
{
Self::with_capacity(cap)
}
}
impl<T> NewCapacity for Vec<T>
{
fn new() -> Self
{
Self::new()
}
fn with_capacity(cap: usize) -> Self
{
Self::with_capacity(cap)
}
}
pub fn hint_cap<T: NewCapacity, I: Iterator>(iter: &I) -> T
{
match iter.size_hint() {
(0, Some(0)) | (0, None) => T::new(),
(_, Some(x)) | (x, _) => T::with_capacity(x)
}
}
#[macro_export] macro_rules! opaque_error {
($msg:literal) => {
{
#[derive(Debug)]
struct OpaqueError;
impl ::std::error::Error for OpaqueError{}
impl ::std::fmt::Display for OpaqueError
{
fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result
{
write!(f, $msg)
}
}
OpaqueError
}
};
($msg:literal $($tt:tt)*) => {
{
#[derive(Debug)]
struct OpaqueError(String);
impl ::std::error::Error for OpaqueError{}
impl ::std::fmt::Display for OpaqueError
{
fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result
{
write!(f, "{}", self.0)
}
}
OpaqueError(format!($msg $($tt)*))
}
};
(yield $msg:literal $($tt:tt)*) => {
{
#[derive(Debug)]
struct OpaqueError<'a>(fmt::Arguments<'a>);
impl ::std::error::Error for OpaqueError{}
impl ::std::fmt::Display for OpaqueError
{
fn fmt(&self, f: &mut ::std::fmt::Formatter<'_>) -> ::std::fmt::Result
{
write!(f, "{}", self.0)
}
}
OpaqueError(format_args!($msg $($tt)*))
}
};
}
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