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Allie Signet 2022-06-30 20:23:25 -03:00
commit 12cde6bb15
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1
.gitignore vendored Normal file
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/target

508
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[package]
name = "crow"
version = "0.1.0"
edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
base64-url = "1.4.13"
blake2 = "0.10.4"
lmdb-zero = "0.4.4"
multipart = { git = "https://github.com/emily-signet/multipart", default-features = false, features = ["server", "tiny_http"] }
tiny_http = "0.11.0"
url = "2.2.2"

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README.md Normal file
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# oh hello you have found my vile creation
### todos
- proper error handling
- clean up the code in general (can you tell it's bad)
- use a hasher per thread
- special handling for media: we want to hash it based on pixels, not raw bytes.
- transcoding support for images (post image -> store webp -> send back jpg/webp/png depending on need)

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src/main.rs Normal file
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extern crate multipart;
extern crate tiny_http;
use blake2::{Blake2s256, Digest};
use lmdb::LmdbResultExt;
use lmdb_zero as lmdb;
use multipart::server::Multipart;
use std::{
io::{self, Read},
sync::Arc,
thread,
};
use tiny_http::{Request, Response};
fn main() {
let env = Arc::new(unsafe {
lmdb::EnvBuilder::new()
.unwrap()
.open("./db", lmdb::open::Flags::empty(), 0o600)
.unwrap()
});
let db = Arc::new(
lmdb::Database::open(env.clone(), None, &lmdb::DatabaseOptions::defaults()).unwrap(),
);
let server =
Arc::new(tiny_http::Server::http("localhost:8000").expect("Could not bind localhost:8000"));
let mut guards = Vec::with_capacity(4);
for _ in 0..4 {
let server = server.clone();
let db = db.clone();
let env = env.clone();
let guard = thread::spawn(move || loop {
let request = server.recv().unwrap();
match request.url() {
"/upload" => {
let mut txn = lmdb::WriteTransaction::new(env.clone()).unwrap();
process_upload(request, &mut txn, db.clone()).unwrap();
txn.commit().unwrap();
}
s if s.starts_with("/get/") => {
let mut txn = lmdb::ReadTransaction::new(env.clone()).unwrap();
process_get(request, &mut txn, db.clone()).unwrap();
}
_ => todo!(),
}
});
guards.push(guard);
}
for guard in guards {
guard.join().unwrap();
}
}
fn process_upload(
mut request: Request,
txn: &mut lmdb::WriteTransaction<'_>,
db: Arc<lmdb::Database<'_>>,
) -> io::Result<()> {
if let Ok(form) = Multipart::from_request(&mut request) {
if let Some(mut entry) = form.into_entry().into_result()? {
let mut data: Vec<u8> = Vec::with_capacity(20000);
entry.data.read_to_end(&mut data)?;
let data_hash = Blake2s256::digest(&data);
let mut accessor = txn.access();
if accessor
.get::<[u8], [u8]>(&db, data_hash.as_slice())
.to_opt()
.unwrap()
.is_some()
{
println!("found dupe!");
request.respond(Response::from_string(base64_url::encode(&data_hash)))?;
return Ok(());
}
accessor
.put(&db, data_hash.as_slice(), &data, lmdb::put::Flags::empty())
.unwrap();
request.respond(Response::from_string(base64_url::encode(&data_hash)))?;
}
}
Ok(())
}
fn process_get(
request: Request,
txn: &mut lmdb::ReadTransaction<'_>,
db: Arc<lmdb::Database<'_>>,
) -> io::Result<()> {
let get_id = request
.url()
.strip_prefix("/get/")
.and_then(|s| {
let mut out: [u8; 32] = [0; 32];
base64_url::decode_to_slice(s, &mut out).ok()?;
Some(out)
})
.unwrap();
let access = txn.access();
if let Some(data) = access.get::<[u8], [u8]>(&db, &get_id).to_opt().unwrap() {
request.respond(Response::new(
200.into(),
vec![],
data,
Some(data.len()),
None,
))?;
} else {
request.respond(Response::empty(404))?;
}
Ok(())
}