Merge pull request #599 from vverst/cors

Add Cors headers
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Daniel García 2019-09-03 20:22:54 +02:00 committed by GitHub
commit 65c0d1064b
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2 changed files with 49 additions and 1 deletions

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@ -250,7 +250,8 @@ fn launch_rocket() {
let rocket = rocket
.manage(db::init_pool())
.manage(api::start_notification_server())
.attach(util::AppHeaders());
.attach(util::AppHeaders())
.attach(util::CORS());
// Launch and print error if there is one
// The launch will restore the original logging level

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@ -4,6 +4,8 @@
use rocket::fairing::{Fairing, Info, Kind};
use rocket::response::{self, Responder};
use rocket::{Request, Response};
use rocket::http::{Header, HeaderMap, ContentType, Method, Status};
use std::io::Cursor;
pub struct AppHeaders();
@ -31,6 +33,51 @@ impl Fairing for AppHeaders {
}
}
pub struct CORS();
impl CORS {
fn get_header(headers: &HeaderMap, name: &str) -> String {
match headers.get_one(name) {
Some(h) => h.to_string(),
_ => "".to_string(),
}
}
}
impl Fairing for CORS {
fn info(&self) -> Info {
Info {
name: "Add CORS headers to requests",
kind: Kind::Response
}
}
fn on_response(&self, request: &Request, response: &mut Response) {
let req_headers = request.headers();
// We need to explicitly get the Origin header for Access-Control-Allow-Origin
let req_allow_origin = CORS::get_header(&req_headers, "Origin");
let req_allow_headers = CORS::get_header(&req_headers, "Access-Control-Request-Headers");
let req_allow_methods =CORS::get_header(&req_headers,"Access-Control-Request-Methods");
if request.method() == Method::Options || response.content_type() == Some(ContentType::JSON) {
// Requests with credentials need explicit values since they do not allow wildcards.
response.set_header(Header::new("Access-Control-Allow-Origin", req_allow_origin));
response.set_header(Header::new("Access-Control-Allow-Methods", req_allow_methods));
response.set_header(Header::new("Access-Control-Allow-Headers", req_allow_headers));
response.set_header(Header::new("Access-Control-Allow-Credentials", "true"));
}
if request.method() == Method::Options {
response.set_status(Status::Ok);
response.set_header(ContentType::Plain);
response.set_sized_body(Cursor::new(""));
}
}
}
pub struct Cached<R>(R, &'static str);
impl<R> Cached<R> {