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Re: Problems accessing GitHub's SVN-bridge with SVN 1.11

From: Branko Čibej <brane_at_apache.org>
Date: Thu, 15 Nov 2018 21:18:25 +0100

On 15.11.2018 17:27, Branko Čibej wrote:
> [Moved from users@]
> On 06.11.2018 19:16, Branko Čibej wrote:
>> On 04.11.2018 20:11, Branko Čibej wrote:
>>> On 04.11.2018 18:57, Thorsten Schöning wrote:
>>>> Guten Tag Branko Čibej,
>>>> am Sonntag, 4. November 2018 um 17:47 schrieben Sie:
>>>>> I'm not sure what you mean by "handles more than only DAV successfully"
>>>> I thought it might be possible that GitHub answers differently but
>>>> properly, because the other check mentioned something about HTTP v2.
>>>> Because of TLS, I was unable to look at the requests and responses
>>>> then, but it's like you said, they don't provide DAV-headers in their
>>>> response to OPTION.
>>>>> And yes, the HTTP/DAV specification requires that header to be present
>>>>> in the response.
>>>> Which you didn't care about before and things worked for some years
>>>> for some users.
>>> We made this change because users complained about unhelpful error
>>> messages when they tried to connect to a server that did not even
>>> implement HTTP/DAV. The error message was "Malformed XML in response"
>>> which wasn't exactly helpful for diagnosing the problem.
>>> I admit I didn't have GitHub in mind when I added this check. ...
>> I added a test case to our suite that tries the following command:
>> svn info https://github.com/apache/subversion/trunk
>> It runs on one of our build slaves, so we'll know fairly soon when (if)
>> GitHub deploys a fix. And, of course, we'll also know if this feature
>> breaks again in future.
>> http://svn.apache.org/r1845942
> I created SVN-4789 to track this and added a patch with a possible fix.
> I did not commit it because it contains what is, in my opinion, a really
> horrible hack; but it does let our client work against
> https://github.com again. I would very much prefer that GitHub adds that
> trivial one-liner fix to their bridge implementation. However, if this
> issue persists and prevents users from migrating to 1.11.x and later, we
> may have to use this hack under protest. Note that it is in some ways
> similar to the now-defunct ASP.NET hack.
> [[[
> Hack ra_serf to work with GitHub's bridge again.
> * subversion/libsvn_ra_serf/options.c
> (options_context_t): New member 'received_github_request_id_header'.
> (capabilities_headers_iterator_callback): Check if we received that header.
> (options_response_handler): Allow DAV responses without DAV headers, if
> the 'X-GitHub-Request-Id' header is present.
> * subversion/tests/cmdline/dav_tests.py
> (connect_to_github_server):
> Remove the @XFail annotation. Add an @Issue annotation.
> Change the test URL to point at HTTPd's GitHub mirror.
> Issue: SVN-4789
> ]]]

Actually the attached updated patch is a bit more to my taste.

-- Brane

Received on 2018-11-15 21:18:38 CET

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