Use nsCrossSiteListenerProxy.h helpers to implement CORS support.
Several CORS fixes and lots of CORS tests.
Fixes:
Use empty string stream if response has no stream.
Parse Access-Control-Expose-Headers correctly.
Copy over remaining InternalRequest constructor attributes and set unsafe request flag.
Call FailWithNetworkError() in more cases.
Add non-simple Request headers to unsafeHeaders list for CORS check.
Do not AsyncOpen channel directly when CORS preflight is required.
Fix check for simple request method (was checking the opposite condition).
This patch has the following big pieces:
HTTP support in FetchDriver, which requires the principal of the caller to be passed.
Managing worker lifetime when a fetch() call is in progress.
Managing worker lifetime when a Response body is being read.
Using nsIPipe to link network streams to Request/Response body streams.
Using nsIInputStreamPump to convert Request/Response body streams into respective types.
Folded:
Bug 1039846 - Fetch API: Use a pipe to immediately start writing HTTP body data to InternalResponse.
Bug 1039846 - Assert bodystream can be set only once
Bug 1039846 - Add feature when handling fetch responses on workers
Bug 1039846 - Try to retarget http fetch delivery off main thread.
Bug 1039846 - Safely consume body using nsIInputStreamPump on workers and main thread.
Bug 1039846 - Retarget body reading to stream transport service.
