[Webkit-unassigned] [Bug 177978] New: Fetch fails to return response if response is received before full request body transmitted

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=177978

            Bug ID: 177978
           Summary: Fetch fails to return response if response is received
                    before full request body transmitted
           Product: WebKit
           Version: Safari 10
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebCore Misc.
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: niklas.nordlund at yahoo.com

When doing a HTTP POST request with a request body using fetch(), it fails to return the server response if the response was received before the full request body was transmitted. 

For instance, I see this happening when sending (large) image/png data in body and using invalid credentials (Cookies), so the server in this case responds with a 401 before the full body is received. Safari treats it just like a dropped network call (TypeError), instead of returning the server response.

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