Enable OpenEndedDictionary in Headers

Expected wpt results are updated as well.

components/script/dom/bindings/mozmap.rs

@@ -23,6 +23,7 @@ use std::collections::HashMap;
 use std::ops::Deref;
 
 /// The `MozMap` (open-ended dictionary) type.
+#[derive(Clone)]
 pub struct MozMap<T> {
     map: HashMap<DOMString, T>,
 }

components/script/dom/headers.rs

@@ -3,10 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::cell::DOMRefCell;
-use dom::bindings::codegen::Bindings::HeadersBinding;
-use dom::bindings::codegen::Bindings::HeadersBinding::HeadersMethods;
-use dom::bindings::codegen::Bindings::HeadersBinding::HeadersWrap;
-use dom::bindings::codegen::UnionTypes::HeadersOrByteStringSequenceSequence;
+use dom::bindings::codegen::Bindings::HeadersBinding::{HeadersInit, HeadersMethods, HeadersWrap};
 use dom::bindings::error::{Error, ErrorResult, Fallible};
 use dom::bindings::global::GlobalRef;
 use dom::bindings::iterable::Iterable;
@@ -51,7 +48,7 @@ impl Headers {
     }
 
     // https://fetch.spec.whatwg.org/#dom-headers
-    pub fn Constructor(global: GlobalRef, init: Option<HeadersBinding::HeadersInit>)
+    pub fn Constructor(global: GlobalRef, init: Option<HeadersInit>)
                        -> Fallible<Root<Headers>> {
         let dom_headers_new = Headers::new(global);
         try!(dom_headers_new.fill(init));
@@ -169,10 +166,10 @@ impl HeadersMethods for Headers {
 
 impl Headers {
     // https://fetch.spec.whatwg.org/#concept-headers-fill
-    pub fn fill(&self, filler: Option<HeadersBinding::HeadersInit>) -> ErrorResult {
+    pub fn fill(&self, filler: Option<HeadersInit>) -> ErrorResult {
         match filler {
             // Step 1
-            Some(HeadersOrByteStringSequenceSequence::Headers(h)) => {
+            Some(HeadersInit::Headers(h)) => {
                 for header in h.header_list.borrow().iter() {
                     try!(self.Append(
                         ByteString::new(Vec::from(header.name())),
@@ -182,7 +179,7 @@ impl Headers {
                 Ok(())
             },
             // Step 2
-            Some(HeadersOrByteStringSequenceSequence::ByteStringSequenceSequence(v)) => {
+            Some(HeadersInit::ByteStringSequenceSequence(v)) => {
                 for mut seq in v {
                     if seq.len() == 2 {
                         let val = seq.pop().unwrap();
@@ -196,7 +193,14 @@ impl Headers {
                 }
                 Ok(())
             },
-            // Step 3 TODO constructor for when init is an open-ended dictionary
+            Some(HeadersInit::ByteStringMozMap(m)) => {
+                for (key, value) in m.iter() {
+                    let key_vec = key.as_ref().to_string().into();
+                    let headers_key = ByteString::new(key_vec);
+                    try!(self.Append(headers_key, value.clone()));
+                }
+                Ok(())
+            },
             None => Ok(()),
         }
     }

components/script/dom/request.rs

@@ -3,6 +3,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 use dom::bindings::cell::DOMRefCell;
+use dom::bindings::codegen::Bindings::HeadersBinding::HeadersInit;
 use dom::bindings::codegen::Bindings::RequestBinding;
 use dom::bindings::codegen::Bindings::RequestBinding::ReferrerPolicy;
 use dom::bindings::codegen::Bindings::RequestBinding::RequestCache;
@@ -14,7 +15,6 @@ use dom::bindings::codegen::Bindings::RequestBinding::RequestMethods;
 use dom::bindings::codegen::Bindings::RequestBinding::RequestMode;
 use dom::bindings::codegen::Bindings::RequestBinding::RequestRedirect;
 use dom::bindings::codegen::Bindings::RequestBinding::RequestType;
-use dom::bindings::codegen::UnionTypes::HeadersOrByteStringSequenceSequence;
 use dom::bindings::error::{Error, Fallible};
 use dom::bindings::global::GlobalRef;
 use dom::bindings::js::{JS, MutNullableHeap, Root};
@@ -312,7 +312,7 @@ impl Request {
 
         // Step 28
         if let Some(possible_header) = init.headers.as_ref() {
-            if let &HeadersOrByteStringSequenceSequence::Headers(ref init_headers) = possible_header {
+            if let &HeadersInit::Headers(ref init_headers) = possible_header {
                 headers_copy = init_headers.clone();
             }
         }
@@ -337,7 +337,7 @@ impl Request {
         }
 
         // Step 31
-        try!(r.Headers().fill(Some(HeadersOrByteStringSequenceSequence::Headers(headers_copy))));
+        try!(r.Headers().fill(Some(HeadersInit::Headers(headers_copy))));
 
         // Step 32
         let input_body = if let RequestInfo::Request(ref input_request) = input {
@@ -796,13 +796,15 @@ impl Into<RequestRedirect> for NetTraitsRequestRedirect {
     }
 }
 
-impl Clone for HeadersOrByteStringSequenceSequence {
-    fn clone(&self) -> HeadersOrByteStringSequenceSequence {
+impl Clone for HeadersInit {
+    fn clone(&self) -> HeadersInit {
     match self {
-        &HeadersOrByteStringSequenceSequence::Headers(ref h) =>
-            HeadersOrByteStringSequenceSequence::Headers(h.clone()),
-        &HeadersOrByteStringSequenceSequence::ByteStringSequenceSequence(ref b) =>
-            HeadersOrByteStringSequenceSequence::ByteStringSequenceSequence(b.clone()),
+        &HeadersInit::Headers(ref h) =>
+            HeadersInit::Headers(h.clone()),
+        &HeadersInit::ByteStringSequenceSequence(ref b) =>
+            HeadersInit::ByteStringSequenceSequence(b.clone()),
+        &HeadersInit::ByteStringMozMap(ref m) =>
+            HeadersInit::ByteStringMozMap(m.clone()),
         }
     }
 }

components/script/dom/webidls/Headers.webidl

@@ -4,8 +4,7 @@
 
 // https://fetch.spec.whatwg.org/#headers-class
 
-// TODO support OpenEndedDictionary<ByteString>
-typedef (Headers or sequence<sequence<ByteString>>) HeadersInit;
+typedef (Headers or sequence<sequence<ByteString>> or MozMap<ByteString>) HeadersInit;
 
 [Constructor(optional HeadersInit init),
  Exposed=(Window,Worker)]