Fix the webidl for Headers

Make the HeadersInit type match the spec.

Fixes #26441

components/script/dom/headers.rs

@@ -198,20 +198,19 @@ impl HeadersMethods for Headers {
 }
 
 impl Headers {
+    pub fn copy_from_headers(&self, headers: DomRoot<Headers>) -> ErrorResult {
+        for (name, value) in headers.header_list.borrow().iter() {
+            self.Append(
+                ByteString::new(Vec::from(name.as_str())),
+                ByteString::new(Vec::from(value.as_bytes())),
+            )?;
+        }
+        Ok(())
+    }
+
     // https://fetch.spec.whatwg.org/#concept-headers-fill
     pub fn fill(&self, filler: Option<HeadersInit>) -> ErrorResult {
         match filler {
-            // Step 1
-            Some(HeadersInit::Headers(h)) => {
-                for (name, value) in h.header_list.borrow().iter() {
-                    self.Append(
-                        ByteString::new(Vec::from(name.as_str())),
-                        ByteString::new(Vec::from(value.as_bytes())),
-                    )?;
-                }
-                Ok(())
-            },
-            // Step 2
             Some(HeadersInit::ByteStringSequenceSequence(v)) => {
                 for mut seq in v {
                     if seq.len() == 2 {

components/script/dom/request.rs

@@ -311,27 +311,17 @@ impl Request {
         r.headers.or_init(|| Headers::for_request(&r.global()));
 
         // Step 32 - but spec says this should only be when non-empty init?
-        // Step 32.1
+        let headers_copy = init
-        let mut headers_copy = r.Headers();
+            .headers
-
+            .as_ref()
-        // Step 32.2
+            .map(|possible_header| match possible_header {
-        if let Some(possible_header) = init.headers.as_ref() {
+                HeadersInit::ByteStringSequenceSequence(init_sequence) => {
-            match possible_header {
+                    HeadersInit::ByteStringSequenceSequence(init_sequence.clone())
-                &HeadersInit::Headers(ref init_headers) => {
-                    headers_copy = DomRoot::from_ref(&*init_headers);
                 },
-                &HeadersInit::ByteStringSequenceSequence(ref init_sequence) => {
+                HeadersInit::ByteStringByteStringRecord(init_map) => {
-                    headers_copy.fill(Some(HeadersInit::ByteStringSequenceSequence(
+                    HeadersInit::ByteStringByteStringRecord(init_map.clone())
-                        init_sequence.clone(),
-                    )))?;
                 },
-                &HeadersInit::ByteStringByteStringRecord(ref init_map) => {
+            });
-                    headers_copy.fill(Some(HeadersInit::ByteStringByteStringRecord(
-                        init_map.clone(),
-                    )))?;
-                },
-            }
-        }
 
         // Step 32.3
         // We cannot empty `r.Headers().header_list` because
@@ -357,21 +347,17 @@ impl Request {
         }
 
         // Step 32.5
-        match init.headers {
+        match headers_copy {
             None => {
                 // This is equivalent to the specification's concept of
                 // "associated headers list". If an init headers is not given,
                 // but an input with headers is given, set request's
                 // headers as the input's Headers.
                 if let RequestInfo::Request(ref input_request) = input {
-                    r.Headers()
+                    r.Headers().copy_from_headers(input_request.Headers())?;
-                        .fill(Some(HeadersInit::Headers(input_request.Headers())))?;
                 }
             },
-            Some(HeadersInit::Headers(_)) => {
+            Some(headers_copy) => r.Headers().fill(Some(headers_copy))?,
-                r.Headers().fill(Some(HeadersInit::Headers(headers_copy)))?
-            },
-            _ => {},
         }
 
         // Step 32.5-6 depending on how we got here
@@ -493,9 +479,7 @@ impl Request {
         *r_clone.request.borrow_mut() = req.clone();
         r_clone.body_used.set(body_used);
         *r_clone.mime_type.borrow_mut() = mime_type;
-        r_clone
+        r_clone.Headers().copy_from_headers(r.Headers())?;
-            .Headers()
-            .fill(Some(HeadersInit::Headers(r.Headers())))?;
         r_clone.Headers().set_guard(headers_guard);
         Ok(r_clone)
     }
@@ -895,7 +879,6 @@ impl Into<RequestRedirect> for NetTraitsRequestRedirect {
 impl Clone for HeadersInit {
     fn clone(&self) -> HeadersInit {
         match self {
-            &HeadersInit::Headers(ref h) => HeadersInit::Headers(h.clone()),
             &HeadersInit::ByteStringSequenceSequence(ref b) => {
                 HeadersInit::ByteStringSequenceSequence(b.clone())
             },

components/script/dom/response.rs

@@ -4,7 +4,7 @@
 
 use crate::body::{consume_body, consume_body_with_promise, BodyOperations, BodyType};
 use crate::dom::bindings::cell::{DomRefCell, Ref};
-use crate::dom::bindings::codegen::Bindings::HeadersBinding::{HeadersInit, HeadersMethods};
+use crate::dom::bindings::codegen::Bindings::HeadersBinding::HeadersMethods;
 use crate::dom::bindings::codegen::Bindings::ResponseBinding;
 use crate::dom::bindings::codegen::Bindings::ResponseBinding::{
     ResponseMethods, ResponseType as DOMResponseType,
@@ -335,9 +335,7 @@ impl ResponseMethods for Response {
         // Step 2
         let new_response = Response::new(&self.global());
         new_response.Headers().set_guard(self.Headers().get_guard());
-        new_response
+        new_response.Headers().copy_from_headers(self.Headers())?;
-            .Headers()
-            .fill(Some(HeadersInit::Headers(self.Headers())))?;
 
         // https://fetch.spec.whatwg.org/#concept-response-clone
         // Instead of storing a net_traits::Response internally, we

components/script/dom/webidls/Headers.webidl

@@ -4,7 +4,7 @@
 
 // https://fetch.spec.whatwg.org/#headers-class
 
-typedef (Headers or sequence<sequence<ByteString>> or record<ByteString, ByteString>) HeadersInit;
+typedef (sequence<sequence<ByteString>> or record<ByteString, ByteString>) HeadersInit;
 
 [Exposed=(Window,Worker)]
 interface Headers {

tests/wpt/metadata/fetch/api/headers/headers-basic.html.ini

@@ -1,5 +0,0 @@
-[headers-basic.html]
-  type: testharness
-  [Create headers with existing headers with custom iterator]
-    expected: FAIL
-

tests/wpt/metadata/fetch/range/general.any.js.ini

@@ -5,11 +5,10 @@
   [general]
     expected: FAIL
 
-  [Privileged header not allowed for guard type: request-no-cors]
-    expected: FAIL
   [Fetch with range header will be sent with Accept-Encoding: identity]
     expected: FAIL
 
+
 [general.any.html]
   [Untitled]
     expected: FAIL
@@ -17,7 +16,6 @@
   [general]
     expected: FAIL
 
-  [Privileged header not allowed for guard type: request-no-cors]
-    expected: FAIL
   [Fetch with range header will be sent with Accept-Encoding: identity]
     expected: FAIL
+