still working on things!

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minish 2022-12-28 22:57:06 -05:00 committed by minish
commit 05c6460d12
8 changed files with 1252 additions and 0 deletions

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"futures-util",
"http",
"http-body",
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"pin-project-lite",
"tower",
"tower-layer",
"tower-service",
]
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"windows_x86_64_gnu",
"windows_x86_64_gnullvm",
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17
Cargo.toml Normal file
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@ -0,0 +1,17 @@
[package]
name = "breeze"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
axum = "0.6.1"
hyper = { version = "0.14", features = ["full"] }
tokio = { version = "1", features = ["full"] }
tokio-util = { version = "0.7.4", features = ["full"] }
tokio-stream = "0.1"
tower = "0.4.13"
bytes = "1"
rand = "0.8.5"
memory-cache-rs = "0.2.0"

36
src/main.rs Normal file
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@ -0,0 +1,36 @@
use std::sync::{Arc, Mutex};
use axum::{
routing::{get, post},
Router,
};
use bytes::Bytes;
use memory_cache::MemoryCache;
mod state;
mod new;
mod view;
#[tokio::main]
async fn main() {
let mut cache: MemoryCache<String, Bytes> = MemoryCache::new();
let state = state::AppState {
cache: Mutex::new(cache)
};
let app = Router::new()
.route("/new", post(new::new))
.route("/p/:name", get(view::view))
.route("/", get(index))
.with_state(Arc::new(state));
axum::Server::bind(&"127.0.0.1:8000".parse().unwrap()) // don't forget to change this! it's local for now
.serve(app.into_make_service())
.await
.unwrap();
}
async fn index() -> &'static str {
"hi world!"
}

144
src/new.rs Normal file
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@ -0,0 +1,144 @@
use std::{collections::HashMap, ffi::OsStr, io::Read, path::PathBuf, sync::Arc, time::Duration};
use axum::{
extract::{BodyStream, Query, State},
http::HeaderValue,
};
use bytes::{BufMut, Bytes, BytesMut};
use hyper::{header, HeaderMap, StatusCode};
use rand::Rng;
use tokio::{
fs::File,
io::AsyncWriteExt,
sync::mpsc::{self, Receiver, Sender},
};
use tokio_stream::StreamExt;
// create an upload name from an original file name
fn gen_path(original_name: &String) -> PathBuf {
// extract extension from original name
let extension = PathBuf::from(original_name)
.extension()
.and_then(OsStr::to_str)
.unwrap_or_default()
.to_string();
// generate a 6-character alphanumeric string
let id: String = rand::thread_rng()
.sample_iter(&rand::distributions::Alphanumeric)
.take(6)
.map(char::from)
.collect();
// create the path
let mut path = PathBuf::new();
path.push("uploads/");
path.push(id);
path.set_extension(extension);
// if we're already using it, try again
if path.exists() {
gen_path(original_name)
} else {
path
}
}
pub async fn new(
State(state): State<Arc<crate::state::AppState>>,
headers: HeaderMap,
Query(params): Query<HashMap<String, String>>,
mut stream: BodyStream,
) -> Result<String, StatusCode> {
// require name parameter, it's used for determining the file extension
if !params.contains_key("name") {
return Err(StatusCode::BAD_REQUEST);
}
// generate a path, take the name, format a url
let path = gen_path(params.get("name").unwrap());
let name = path
.file_name()
.and_then(OsStr::to_str)
.unwrap_or_default()
.to_string(); // i hope this never happens. that would suck
let url = format!("http://127.0.0.1:8000/p/{}", name);
// process the upload in the background so i can send the URL back immediately!
// this isn't supported by ShareX (it waits for the request to complete before handling the response)
tokio::spawn(async move {
// get the content length, and if parsing it fails, assume it's really big
// it may be better to make it fully content-length not required because this feels kind of redundant
let content_length = headers
.get(header::CONTENT_LENGTH)
.unwrap_or(&HeaderValue::from_static(""))
.to_str()
.and_then(|s| Ok(usize::from_str_radix(s, 10)))
.unwrap()
.unwrap_or(usize::MAX);
// if the upload size exceeds 80 MB, we skip caching!
// previously, i was going to use redis with a 500 MB max (redis's is 512MiB)
// with or without redis, 500 MB is still a bit much..
// it could probably be read from disk before anyone could fully download it
let mut use_cache = content_length < 80_000_000;
println!(
"[upl] content length: {} using cache: {}",
content_length, use_cache
);
// create file to save upload to
let mut file = File::create(path)
.await
.expect("could not open file! make sure your upload path exists");
let mut data: BytesMut = if use_cache {
BytesMut::with_capacity(content_length)
} else {
BytesMut::new()
};
let (tx, mut rx): (Sender<Bytes>, Receiver<Bytes>) = mpsc::channel(1);
tokio::spawn(async move {
while let Some(chunk) = rx.recv().await {
println!("[io] received new chunk");
file.write_all(&chunk)
.await
.expect("error while writing file to disk");
}
});
while let Some(chunk) = stream.next().await {
let chunk = chunk.unwrap();
println!("[upl] sending data to io task");
tx.send(chunk.clone()).await.unwrap();
if use_cache {
println!("[upl] receiving data into cache");
if data.len() + chunk.len() > data.capacity() {
println!("[upl] too much data! the client had an invalid content-length!");
// if we receive too much data, drop the buffer and stop using cache (it is still okay to use disk, probably)
data = BytesMut::new();
use_cache = false;
} else {
data.put(chunk);
}
}
}
let mut cache = state.cache.lock().unwrap();
if use_cache {
println!("[upl] caching upload!!");
cache.insert(name, data.freeze(), Some(Duration::from_secs(30)));
}
});
Ok(url)
}

8
src/state.rs Normal file
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@ -0,0 +1,8 @@
use std::sync::{Mutex, Arc};
use bytes::Bytes;
use memory_cache::MemoryCache;
pub struct AppState {
pub cache: Mutex<MemoryCache<String, Bytes>>
}

133
src/view.rs Normal file
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@ -0,0 +1,133 @@
use std::{
ffi::OsStr,
path::{Component, PathBuf},
sync::Arc,
};
use axum::{
body::StreamBody,
extract::{Path, State},
response::{IntoResponse, Response},
};
use bytes::{buf::Reader, Bytes};
use hyper::StatusCode;
use tokio::fs::File;
use tokio_util::io::ReaderStream;
/* pub enum ViewResponse {
FromDisk(StreamBody<ReaderStream<File>>),
FromCache(Bytes)
}
impl IntoResponse for ViewResponse {
fn into_response(self) -> Response {
match self {
ViewResponse::FromDisk(stream) => stream.into_response(),
ViewResponse::FromCache(data) => data.into_response()
}
}
} */
pub async fn view(
State(state): State<Arc<crate::state::AppState>>,
Path(original_path): Path<PathBuf>,
) -> Response {
println!("{:?}", original_path);
// (hopefully) prevent path traversal, just check for any non-file components
if original_path
.components()
.into_iter()
.any(|x| !matches!(x, Component::Normal(_)))
{
println!("lol NOPE");
return StatusCode::NOT_FOUND.into_response();
}
let name = original_path
.file_name()
.and_then(OsStr::to_str)
.unwrap_or_default()
.to_string();
let cache = state.cache.lock().unwrap();
let cache_item = cache.get(&name);
if true /* cache_item.is_none() */ {
let mut path = PathBuf::new();
path.push("uploads/");
path.push(name);
if !path.exists() || !path.is_file() {
return StatusCode::NOT_FOUND.into_response();
}
let file = File::open(path).await.unwrap();
let reader = ReaderStream::new(file);
let stream = StreamBody::new(reader);
println!("from disk");
return stream.into_response();
}
println!("from cache! :D");
return "asdf".into_response();
}
/* pub async fn view(
State(mem_cache): State<Arc<crate::cache::MemCache>>,
Path(original_path): Path<PathBuf>,
) -> Response {
for component in original_path.components() {
println!("{:?}", component);
}
// (hopefully) prevent path traversal, just check for any non-file components
if original_path
.components()
.into_iter()
.any(|x| !matches!(x, Component::Normal(_)))
{
return StatusCode::NOT_FOUND.into_response()
}
// this causes an obscure bug where filenames like hiworld%2fnamehere.png will still load namehere.png
// i could limit the path components to 1 and sort of fix this
let name = original_path
.file_name()
.and_then(OsStr::to_str)
.unwrap_or_default()
.to_string();
let cache = mem_cache.cache.lock().unwrap();
let cache_item = cache.get(&name);
if cache_item.is_some() {
println!("they requested something in the cache!");
let data = cache_item.unwrap().clone();
return data.into_response()
}
let mut path = PathBuf::new();
path.push("uploads/");
path.push(name);
if !path.exists() || !path.is_file() {
return StatusCode::NOT_FOUND.into_response()
}
let file = File::open(path).await.unwrap();
let reader = ReaderStream::new(file);
let stream = StreamBody::new(reader);
stream.into_response()
}
*/