1 files changed, 17 insertions, 2 deletions
diff --git a/components/net_traits/lib.rs b/components/net_traits/lib.rs
index bd3436d9f00..2cbc198e0f7 100644
--- a/components/net_traits/lib.rs
+++ b/components/net_traits/lib.rs
@@ -170,7 +170,7 @@ pub enum FetchResponseMsg {
     ProcessRequestBody,
     ProcessRequestEOF,
     // todo: send more info about the response (or perhaps the entire Response)
-    ProcessResponse(Result<Metadata, NetworkError>),
+    ProcessResponse(Result<FetchMetadata, NetworkError>),
     ProcessResponseChunk(Vec<u8>),
     ProcessResponseEOF(Result<(), NetworkError>),
 }
@@ -200,10 +200,25 @@ pub trait FetchTaskTarget {
     fn process_response_eof(&mut self, response: &Response);
 }
 
+#[derive(Serialize, Deserialize)]
+pub enum FilteredMetadata {
+    Opaque,
+    Transparent(Metadata)
+}
+
+#[derive(Serialize, Deserialize)]
+pub enum FetchMetadata {
+    Unfiltered(Metadata),
+    Filtered {
+        filtered: FilteredMetadata,
+        unsafe_: Metadata
+    }
+}
+
 pub trait FetchResponseListener {
     fn process_request_body(&mut self);
     fn process_request_eof(&mut self);
-    fn process_response(&mut self, metadata: Result<Metadata, NetworkError>);
+    fn process_response(&mut self, metadata: Result<FetchMetadata, NetworkError>);
     fn process_response_chunk(&mut self, chunk: Vec<u8>);
     fn process_response_eof(&mut self, response: Result<(), NetworkError>);
 }