Fix for svn: E175009: XML parsing failed: (400 Bad Request)

When doing an svn checkout (or svn update), on a repo that is served by Apache httpd with IIS as a reverse proxy (you are connecting to IIS, not directly Apache), or when you are connecting using some (forward) http proxies, a HTTP 400 error is thrown (this is from the reverse/forward proxy, the request never reaches Apache httpd). Specifically, the error is "svn: E175009: XML parsing failed: (400 Bad Request)".

The problem is that the Accept-Encoding header is malformed. Specifically, when compression is enabled, it's "gzip;svndiff1;q=0.9,svndiff;q=0.8" instead of the correct "gzip,svndiff1;q=0.9,svndiff;q=0.8" (there is a semicolon instead of a comma).

The problem exists inside file /subversion/libsvn_ra_serf/update.c, line 2742. This was changed in r1436783.

I have attached the proposed patch, it's really a single character change. Until this (or something better) is applied, a workaround exists of modifying the "servers" configuration file (%APPDATA%\Subversion\servers for Windows, ~/.subversion/servers for Linux), and add the option "http-compression = no" either globally or on the affected servers.

-- 
George Schizas
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Afhse me mono mou, emena kai ton klwno mou
Leave me alone, just me and my clone