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use crate::rate_limit::RateLimit;
use actix::clock::Duration;
use actix_web::{body::BodyStream, http::StatusCode, *};
use awc::Client;
use lemmy_utils::settings::Settings;
use serde::{Deserialize, Serialize};
const THUMBNAIL_SIZES: &[u64] = &[256];
pub fn config(cfg: &mut web::ServiceConfig, rate_limit: &RateLimit) {
let client = Client::build()
.header("User-Agent", "pict-rs-frontend, v0.1.0")
.timeout(Duration::from_secs(30))
.finish();
cfg
.data(client)
.service(
web::resource("/pictrs/image")
.wrap(rate_limit.image())
.route(web::post().to(upload)),
)
.service(web::resource("/pictrs/image/{filename}").route(web::get().to(full_res)))
.service(
web::resource("/pictrs/image/thumbnail{size}/{filename}").route(web::get().to(thumbnail)),
)
.service(web::resource("/pictrs/image/delete/{token}/{filename}").route(web::get().to(delete)));
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Image {
file: String,
delete_token: String,
}
#[derive(Debug, Serialize, Deserialize)]
pub struct Images {
msg: String,
files: Option<Vec<Image>>,
}
async fn upload(
req: HttpRequest,
body: web::Payload,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
// TODO: check auth and rate limit here
let mut res = client
.request_from(format!("{}/image", Settings::get().pictrs_url), req.head())
.if_some(req.head().peer_addr, |addr, req| {
req.header("X-Forwarded-For", addr.to_string())
})
.send_stream(body)
.await?;
let images = res.json::<Images>().await?;
Ok(HttpResponse::build(res.status()).json(images))
}
async fn full_res(
filename: web::Path<String>,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let url = format!(
"{}/image/{}",
Settings::get().pictrs_url,
&filename.into_inner()
);
image(url, req, client).await
}
async fn thumbnail(
parts: web::Path<(u64, String)>,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let (size, file) = parts.into_inner();
if THUMBNAIL_SIZES.contains(&size) {
let url = format!(
"{}/image/thumbnail{}/{}",
Settings::get().pictrs_url,
size,
&file
);
return image(url, req, client).await;
}
Ok(HttpResponse::NotFound().finish())
}
async fn image(
url: String,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let res = client
.request_from(url, req.head())
.if_some(req.head().peer_addr, |addr, req| {
req.header("X-Forwarded-For", addr.to_string())
})
.no_decompress()
.send()
.await?;
if res.status() == StatusCode::NOT_FOUND {
return Ok(HttpResponse::NotFound().finish());
}
let mut client_res = HttpResponse::build(res.status());
for (name, value) in res.headers().iter().filter(|(h, _)| *h != "connection") {
client_res.header(name.clone(), value.clone());
}
Ok(client_res.body(BodyStream::new(res)))
}
async fn delete(
components: web::Path<(String, String)>,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let (token, file) = components.into_inner();
let url = format!(
"{}/image/delete/{}/{}",
Settings::get().pictrs_url,
&token,
&file
);
let res = client
.request_from(url, req.head())
.if_some(req.head().peer_addr, |addr, req| {
req.header("X-Forwarded-For", addr.to_string())
})
.no_decompress()
.send()
.await?;
Ok(HttpResponse::build(res.status()).body(BodyStream::new(res)))
}