[Webkit-unassigned] [Bug 138131] New: File uploads not working with a custom NSURLProtocol

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138131

            Bug ID: 138131
           Summary: File uploads not working with a custom NSURLProtocol
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: iOS
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebKit API
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: danielo at opera.com

The file upload using input type="file" or FormData API is not working when the URL is loaded using a custom NSURLProtocol.

If a custom NSURLProtocol is handling an HTTP POST request, the request HTTPBodyStream is nil.
This only happens if [WKBrowsingContextController registerSchemeForCustomProtocol:] is called for that protocol. If this method is not called, then the POST request is simply bypassing the custom protocol.

This happens, because HTTP body stream (NSURLRequest.HTTPBodyStream) is not serialized in IPC messages when sending the request from the networking process to the UI process.
See http://trac.webkit.org/browser/trunk/Source/WebKit2/Shared/mac/WebCoreArgumentCodersMac.mm#L93 :
    [(NSMutableURLRequest *)requestToSerialize setHTTPBodyStream:nil];

This happens on iOS 8.1 [12B401].
It's also reproducible on the master branch ( 809db5f8edac632ec3332b43dc90795d96914440 ).

This bug is related to https://bugs.webkit.org/show_bug.cgi?id=137299

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