fix: fetch improve finaly spec compliance

lib/fetch/index.js

@@ -742,30 +742,44 @@ function finalizeResponse (fetchParams, response) {
 function fetchFinale (fetchParams, response) {
   const context = this
 
-  // 1. If fetchParams’s process response is non-null,
-  // then queue a fetch task to run fetchParams’s process response
-  // given response, with fetchParams’s task destination.
+  // 1. If response is a network error, then:
+  if (response.type === 'error') {
+    // 1. Set response’s URL list to « fetchParams’s request’s URL list[0] ».
+    response.urlList = [fetchParams.request.urlList[0]]
+
+    // 2. Set response’s timing info to the result of creating an opaque timing
+    // info for fetchParams’s timing info.
+    response.timingInfo = createOpaqueTimingInfo({
+      startTime: fetchParams.timingInfo.startTime
+    })
+  }
+
+  // 2. Let processResponseEndOfBody be the following steps:
+  // TODO
+
+  // 3. If fetchParams’s process response is non-null, then queue a fetch task
+  // to run fetchParams’s process response given response, with fetchParams’s
+  // task destination.
   if (fetchParams.processResponse != null) {
     fetchParams.processResponse(response)
   }
 
-  // 2. If fetchParams’s process response consume is non-null, then:.
-  //    TODO
-  //    1. Let processBody given nullOrBytes be this step: run fetchParams’s
-  //    process response consume given response and nullOrBytes.on.
-  //    TODO
-  //    2. Let processBodyError be this step: run fetchParams’s process
-  //    response consume given response and failure.on.
-  //    TODO
-  //    3. If response’s body is null, then queue a fetch task to run
-  //    processBody given null, with fetchParams’s task destination.on.
-  //    TODO
-  //    4. Otherwise, fully read response’s body given processBody,
-  //    processBodyError, and fetchParams’s task destination.on.
-  //    TODO
-
-  // TODO (spec): The spec doesn't specify this but we need to
-  // terminate fetch if we have an error response.
+  // 4. If fetchParams’s process response is non-null, then queue a fetch task
+  // to run fetchParams’s process response given response, with fetchParams’s
+  // task destination.
+  // TODO
+
+  // 5. If response’s body is null, then run processResponseEndOfBody.
+  // TODO
+
+  // 6. Otherwise:
+  // TODO
+
+  // 7. If fetchParams’s process response consume body is non-null, then:
+  // TODO
+
+  // TODO: This is a workaround. Until the above has been implemented, i.e.
+  // we need to either fully consume the body or terminate the fetch.
   if (response.type === 'error') {
     context.terminate({ reason: response.error })
   }