Access older revision of SVN repo via HTTP / mod_svn

Using the mod_svn module for apache you can access the repository not onl via SVN client but also directly via HTTP using the same URL. You only get a plain directory listing showing t开发者_开发百科he HEAD revision in such a case.

It is possible (may be via URL parameters) to access older revisions of the SVN repository if they has net been copied/tagged within the SVN?

I know that there are 3rd party software that allows to do so like ViewCV or WebSVN but I am interested in how far you get with only a plain SVN repository accessible via mod_svn and HTTP(S).

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You can use the r querystring parameter to access older versions of files and directory listings with mod_dav_svn. For example:

http://host.example.com/repos/project/trunk/README.txt?r=1234

The SVN Book has more details on how this works.