Using MoinMoin with lighttpd 1.4.19

(version française)

MoinMoin uses the PATH_INFO¹ CGI environment variable to know the name of the current page being requested (via FastCGI or SCGI). For a root wiki, the PATH_INFO sent by lighttpd 1.4.19 thru FLUP is incorrect².

This will affect your wiki as follows:

• When you click on a first link of the wiki (LinkOne), this link is shown in the URL bar, but the page itself is not shown.

• When you click on a second link (SecondLink), this new page is shown, but the URL in the URL bar now contains both links (http://myweb.example.org/LinkOne/SecondLink).

Recommended fix: upgrade lighttpd

This is the only option with MoinMoin 1.9.

The option fix-root-scriptname, available since lighttpd 1.4.23, fixes this issue, e.g.:

    fastcgi.server = ( "/" =>
      ((
        "host" => "127.0.0.1",
        "port" => 45999,
        "check-local" => "disable",
        "fix-root-scriptname" => "enable",
      ))
    )

This option is available both for SCGI and FastCGI.

Recommended fix: the Werkzeug Team fixers.py script

Thanks to Thomas Waldmann for suggesting this fix.

1. Download the fixers.py script from http://dev.pocoo.org/projects/werkzeug/browser/werkzeug/contrib/fixers.py.

2. Copy fixers.py in the directory of moin_flup_wsgi.py.

3. Apply the following patch to moin_flup_wsgi.py:

   --- moin_flup_wsgi.py 2009-01-07 00:26:55.000000000 +0000
   +++ moin_flup_wsgi.py.revu 2009-03-02 19:28:19.000000000 +0000
   @@ -41,6 +41,7 @@
   
    from flup.server.fcgi import WSGIServer
    from MoinMoin.server.server_wsgi import moinmoinApp, WsgiConfig
   +from fixers import LighttpdCGIRootFix
   
    class Config(WsgiConfig):
        pass
   @@ -48,7 +49,7 @@
    config = Config()
   
    if __name__ == '__main__':
   - server = WSGIServer(moinmoinApp, bindAddress=unixSocketPath)
   + server = WSGIServer(LighttpdCGIRootFix(moinmoinApp), bindAddress=unixSocketPath)
        server.run()
        os.unlink(unixSocketPath)

4. Compile the 2 scripts with py_compilefiles :

   py_compilefiles *.py

5. Restart MoinMoin.

The quick and dirty solution: patching MoinMoin

The following patch will fix the values provided by lighttpd. It will only work for this precise problem.

--- MoinMoin/request/__init__.py.original      2009-02-17 23:04:03.000000000 +0000
+++ MoinMoin/request/__init__.py       2009-02-17 23:04:52.000000000 +0000
@@ -414,8 +414,8 @@
         self.server_name = env.get('SERVER_NAME', self.server_name)
         self.server_port = env.get('SERVER_PORT', self.server_port)
         self.saved_cookie = env.get('HTTP_COOKIE', '')
-        self.script_name = env.get('SCRIPT_NAME', '')
-        self.path_info = env.get('PATH_INFO', '')
+        self.script_name = ''
+        self.path_info = env.get('SCRIPT_NAME', '') + env.get('PATH_INFO', '')
         self.query_string = env.get('QUERY_STRING', '')
         self.request_method = env.get('REQUEST_METHOD', None)
         self.remote_addr = env.get('REMOTE_ADDR', '')