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Initial version of CORS support
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@ -250,7 +250,8 @@ fn launch_rocket() {
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let rocket = rocket
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.manage(db::init_pool())
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.manage(api::start_notification_server())
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.attach(util::AppHeaders());
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.attach(util::AppHeaders())
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.attach(util::CORS());
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// Launch and print error if there is one
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// The launch will restore the original logging level
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35
src/util.rs
35
src/util.rs
@ -4,6 +4,8 @@
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use rocket::fairing::{Fairing, Info, Kind};
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use rocket::response::{self, Responder};
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use rocket::{Request, Response};
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use rocket::http::{Header, ContentType, Method};
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use std::io::Cursor;
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pub struct AppHeaders();
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@ -31,6 +33,39 @@ impl Fairing for AppHeaders {
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}
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}
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pub struct CORS();
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impl Fairing for CORS {
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fn info(&self) -> Info {
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Info {
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name: "Add CORS headers to requests",
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kind: Kind::Response
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}
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}
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fn on_response(&self, request: &Request, response: &mut Response) {
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// We need to explictly get the Origin header for Access-Control-Allow-Origin
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let origin = match request.headers().get_one("Origin") {
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Some(h) => h.to_string(),
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_ => "".to_string(),
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};
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if request.method() == Method::Options || response.content_type() == Some(ContentType::JSON) {
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// Requests with credentials need explicit values since they do not allow wildcards.
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response.set_header(Header::new("Access-Control-Allow-Origin", origin));
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response.set_header(Header::new("Access-Control-Allow-Methods", "GET, HEAD, POST, PUT, DELETE, CONNECT, OPTIONS, TRACE, PATCH"));
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response.set_header(Header::new("Access-Control-Allow-Headers", "*, Authorization"));
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response.set_header(Header::new("Access-Control-Allow-Credentials", "true"));
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}
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if request.method() == Method::Options {
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response.set_header(ContentType::Plain);
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response.set_sized_body(Cursor::new(""));
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}
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}
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}
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pub struct Cached<R>(R, &'static str);
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impl<R> Cached<R> {
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