doc(examples): working cors example

examples/enable_cors.rs

@@ -24,6 +24,7 @@ fn enable_cors<'mw>(_req: &mut Request, mut res: Response<'mw>) -> MiddlewareRes
 fn main() {
     let mut server = Nickel::new();
     server.utilize(enable_cors);
+    server.options("**", middleware!(""));
     server.get("**", middleware!("Hello CORS Enabled World"));
     server.listen("127.0.0.1:6767").unwrap();
 }

examples/enable_cors_header_set_issue.rs

@@ -0,0 +1,22 @@
+#[macro_use] extern crate nickel;
+extern crate hyper;
+
+use nickel::{Nickel, HttpRouter, Request, Response, MiddlewareResult};
+
+fn enable_cors<'mw>(_req: &mut Request, mut res: Response<'mw>) -> MiddlewareResult<'mw> {
+    // Set appropriate headers
+    res.headers_mut().set_raw("Access-Control-Allow-Origin", vec![b"*".to_vec()]);
+    res.headers_mut().set_raw("Access-Control-Allow-Methods", vec![b"*".to_vec()]);
+    res.headers_mut().set_raw("Access-Control-Allow-Headers", vec![b"Origin, X-Requested-With, Content-Type, Accept".to_vec()]);
+
+    // Pass control to the next middleware
+    res.next_middleware()
+}
+
+fn main() {
+    let mut server = Nickel::new();
+    server.utilize(enable_cors);
+    server.options("**", middleware!(""));
+    server.get("**", middleware!("Hello CORS Enabled World"));
+    server.listen("127.0.0.1:6767").unwrap();
+}