Hexbear is the engine that powers Chapochat. It is a customization of the Lemmy project.
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use crate::api::claims::Claims;
use std::time::Duration;
use actix_web::{*, body::BodyStream, http::StatusCode, web::Data};
use awc::Client;
use lemmy_rate_limit::RateLimit;
use lemmy_utils::settings::Settings;
use serde::{Deserialize, Serialize};
pub fn config(cfg: &mut web::ServiceConfig, rate_limit: &RateLimit) {
let client = Client::builder()
.header("User-Agent", "pict-rs-frontend, v0.1.0")
.timeout(Duration::from_secs(30))
.finish();
cfg
.app_data(Data::new(client))
.service(
web::resource("/pictrs/image")
.wrap(rate_limit.image())
.route(web::post().to(upload)),
)
// This has optional query params: /image/{filename}?format=jpg&thumbnail=256
.service(web::resource("/pictrs/image/{filename}").route(web::get().to(full_res)))
.service(web::resource("/pictrs/image/delete/{token}/{filename}").route(web::get().to(delete)));
}
#[derive(Debug, Serialize, Deserialize)]
struct Image {
file: String,
delete_token: String,
}
#[derive(Debug, Serialize, Deserialize)]
struct Images {
msg: String,
files: Option<Vec<Image>>,
}
#[derive(Deserialize)]
struct PictrsParams {
format: Option<String>,
thumbnail: Option<String>,
}
async fn upload(
req: HttpRequest,
body: web::Payload,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
// TODO: check rate limit here
let jwt = req.cookie("jwt");
if jwt.is_none() || Claims::decode(jwt.unwrap().value()).is_err() {
return Ok(HttpResponse::Unauthorized().finish());
};
let mut client_req =
client.request_from(format!("{}/image", Settings::get().pictrs_url), req.head());
if let Some(addr) = req.head().peer_addr {
client_req = client_req.append_header(("X-Forwarded-For", addr.to_string()))
};
let mut res = client_req.send_stream(body).await.map_err(|e| error::ErrorBadRequest(e))?;
let images = res.json::<Images>().await.map_err(|e| error::ErrorBadRequest(e))?;
Ok(HttpResponse::build(res.status()).json(images))
}
async fn full_res(
filename: web::Path<String>,
web::Query(params): web::Query<PictrsParams>,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let name = &filename.into_inner();
// If there are no query params, the URL is original
let url = if params.format.is_none() && params.thumbnail.is_none() {
format!("{}/image/original/{}", Settings::get().pictrs_url, name,)
} else {
// Use jpg as a default when none is given
let format = params.format.unwrap_or_else(|| "jpg".to_string());
let mut url = format!(
"{}/image/process.{}?src={}",
Settings::get().pictrs_url,
format,
name,
);
if let Some(size) = params.thumbnail {
url = format!("{}&thumbnail={}", url, size,);
}
url
};
image(url, req, client).await
}
async fn image(
url: String,
req: HttpRequest,
client: web::Data<Client>,
) -> Result<HttpResponse, Error> {
let mut client_req = client.request_from(url, req.head());
if let Some(addr) = req.head().peer_addr {
client_req = client_req.append_header(("X-Forwarded-For", addr.to_string()))
};
let res = client_req.no_decompress().send().await.map_err(|e| error::ErrorBadRequest(e))?;
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.append_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 mut client_req = client.request_from(url, req.head());
if let Some(addr) = req.head().peer_addr {
client_req = client_req.append_header(("X-Forwarded-For", addr.to_string()))
};
let res = client_req.no_decompress().send().await.map_err(|e| error::ErrorBadRequest(e))?;
Ok(HttpResponse::build(res.status()).body(BodyStream::new(res)))
}