[Webkit-unassigned] [Bug 60875] New: [SOUP] Abnormal operation if server sends 5xx status code without HTTP body

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=60875

           Summary: [SOUP] Abnormal operation if server sends 5xx status
                    code without HTTP body
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: Platform
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: keunsoon.lee at samsung.com


* Background
   - Almost all web servers sends its own error page when they sends 5xx status code. But some web servers and proxy servers send no error page. 

* Reproduce scenario
1) Visit any website
2) The web site's server or proxy server send 5xx status code without error page (i.e. HTTP body)
   - Usually the HTTP response header does not have Content-Type in this case.
3) Webkit soup port accepts MIME-Type "inode/directory" from libsoup's content sniff callback
4) Webkit soup port throws the HTTP response to WebCore.
5) WebCore recognizes the HTTP response as download because it cannot handle the MIME-Type "inode/directory"

* Tips for reproducing on actual world (in my specific case)
1) Run Webkit Browser on smartphone
2) Use 3G network via Vodafone proxy
3) Try to visit "http://www.kimyuna.zoa.to"
4) Then, the proxy server cannot find the web page, and sends "504 Gateway Timeout" without HTTP body.

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