Changes between Version 1 and Version 2 of TracModPython


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Timestamp:
Jul 4, 2010 6:44:42 AM (9 years ago)
Author:
trac
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  • TracModPython

    v1 v2  
    44Trac supports [http://www.modpython.org/ mod_python], which speeds up Trac's response times considerably, especially compared to [TracCgi CGI], and permits use of many Apache features not possible with [wiki:TracStandalone tracd]/mod_proxy.
    55
    6 These instructions are for Apache 2; if you are still using Apache 1.3, you may have some luck with [wiki:TracModPython2.7 TracModPython2.7].
     6These instructions are for Apache 2; if you are still using Apache 1.3, you may have some luck with [trac:wiki:TracModPython2.7 TracModPython2.7].
    77
    88== Simple configuration ==
     
    1313}}}
    1414
    15  ''Note: The exact path to the module depends on how the HTTPD installation is laid out.''
     15''Note: The exact path to the module depends on how the HTTPD installation is laid out.''
     16
    1617On Debian using apt-get
    1718{{{
     
    5758    PythonOption TracEnvParentDir /var/trac/myprojects
    5859    # For the index of multiple projects
    59     PythonOption TracEnvIndexTemplate /srv/www/htdocs/trac/project_list_tepmlate.html
     60    PythonOption TracEnvIndexTemplate /srv/www/htdocs/trac/project_list_template.html
    6061    # A space delimitted list, with a "," between key and value pairs.
    6162    PythonOption TracTemplateVars key1,val1 key2,val2
     
    6667}}}
    6768
     69=== Python Egg Cache ===
     70
     71Compressed python eggs like Genshi are normally extracted into a directory named `.python-eggs` in the users home directory. Since apache's home usually is not writable an alternate egg cache directory can be specified like this:
     72{{{
     73PythonOption PYTHON_EGG_CACHE /var/trac/myprojects/egg-cache
     74}}}
     75
     76or you can uncompress the Genshi egg to resolve problems extracting from it.
    6877=== Configuring Authentication ===
    6978
     
    141150
    142151
     152=== Setting the Python Egg Cache ===
     153
     154If the Egg Cache isn't writeable by your Web server, you'll either have to change the permissions, or point Python to a location where Apache can write. This can manifest itself as a ''500 internal server error'' and/or a complaint in the syslog.
     155
     156{{{
     157#!xml
     158<Location /projects/myproject>
     159  ...
     160  PythonOption PYTHON_EGG_CACHE /tmp
     161  ...
     162</Location>
     163}}}
     164
    143165
    144166=== Setting the !PythonPath ===
     
    217239}}}
    218240
    219 if you have issues with login try using `<LocationMatch>` instead of `<Location>`
     241This does not seem to work in all cases. What you can do if it does not:
     242 * Try using `<LocationMatch>` instead of `<Location>`
     243 * <Location /> may, in your server setup, refer to the complete host instead of simple the root of the server. This means that everything (including the login directory referenced below) will be sent to python and authentication does not work (i.e. you get the infamous Authentication information missing error). If this applies to you, try using a sub-directory for trac instead of the root (i.e. /web/ and /web/login instead of / and /login).
     244 * Depending on apache's `NameVirtualHost` configuration, you may need to use `<VirtualHost *:80>` instead of `<VirtualHost *>`.
    220245
    221246For a virtual host that supports multiple projects replace "`TracEnv`" /var/trac/myproject with "`TracEnvParentDir`" /var/trac/
    222247
    223 Note: !DocumentRoot should not point to your Trac project env. As Asmodai wrote on #trac: "suppose there's a webserer bug that allows disclosure of !DocumentRoot they could then leech the entire Trac environment".
     248Note: !DocumentRoot should not point to your Trac project env. As Asmodai wrote on #trac: "suppose there's a webserver bug that allows disclosure of !DocumentRoot they could then leech the entire Trac environment".
    224249
    225250== Troubleshooting ==
     
    256281Using <Location /> together with `SetHandler` resulted in having everything handled by mod_python, which leads to not being able download any CSS or images/icons. I used <Location /trac> `SetHandler None` </Location> to circumvent the problem, though I do not know if this is the most elegant solution.
    257282
     283=== Problem with zipped egg ===
     284
     285It's possible that your version of mod_python will not import modules from zipped eggs. If you encounter an `ImportError: No module named trac` in your Apache logs but you think everything is where it should be, this might be your problem. Look in your site-packages directory; if the Trac module appears as a ''file'' rather than a ''directory'', then this might be your problem. To rectify, try installing Trac using the `--always-unzip` option, like this:
     286
     287{{{
     288easy_install --always-unzip Trac-0.12b1.zip
     289}}}
     290
    258291=== Using .htaccess ===
    259292
     
    261294
    262295It may be possible to work around this with mod_rewrite, but I failed to get this working. In all, it is more hassle than it is worth. Stick to the provided instructions. :)
     296
     297A success story: For me it worked out-of-box, with following trivial config:
     298{{{
     299SetHandler mod_python
     300PythonInterpreter main_interpreter
     301PythonHandler trac.web.modpython_frontend
     302PythonOption TracEnv /system/path/to/this/directory
     303PythonOption TracUriRoot /path/on/apache
     304
     305AuthType Basic
     306AuthName "ProjectName"
     307AuthUserFile /path/to/.htpasswd
     308Require valid-user
     309}}}
     310
     311The `TracUriRoot` is obviously the path you need to enter to the browser to get to the trac (e.g. domain.tld/projects/trac)
     312
     313=== Additional .htaccess help ===
     314
     315If you are using the .htaccess method you may have additional problems if your trac directory is inheriting .htaccess directives from another.  This may also help to add to your .htaccess file:
     316
     317{{{
     318<IfModule mod_rewrite.c>
     319  RewriteEngine Off
     320</IfModule>
     321}}}
     322
    263323
    264324=== Win32 Issues ===
     
    279339}}}
    280340
    281 See also [[http://subversion.tigris.org/faq.html#reposperms]]
     341See also [http://subversion.tigris.org/faq.html#reposperms]
    282342
    283343=== FreeBSD issues ===
     
    285345
    286346If you compiled and installed apache2, apache wouldn´t support threads (cause it doesn´t work very well on FreeBSD). You could force thread support when running ./configure for apache, using --enable-threads, but this isn´t recommendable.
    287 The best option [[http://modpython.org/pipermail/mod_python/2006-September/021983.html seems to be]] adding to /usr/local/apache2/bin/ennvars the line
     347The best option [http://modpython.org/pipermail/mod_python/2006-September/021983.html seems to be] adding to /usr/local/apache2/bin/ennvars the line
    288348
    289349{{{
     
    297357If this is not the case, it's possible that you're using Subversion libraries that are binary incompatible with the apache ones (an incompatibility of the `apr` libraries is usually the cause). In that case, you also won't be able to use the svn modules for Apache (`mod_dav_svn`).
    298358
    299 You also need a recent version of `mod_python` in order to avoid a runtime error ({{{argument number 2: a 'apr_pool_t *' is expected}}}) due to the default usage of multiple sub-interpreters. 3.2.8 ''should'' work, though it's probably better to use the workaround described in #3371, in order to force the use of the main interpreter:
     359You also need a recent version of `mod_python` in order to avoid a runtime error ({{{argument number 2: a 'apr_pool_t *' is expected}}}) due to the default usage of multiple sub-interpreters. 3.2.8 ''should'' work, though it's probably better to use the workaround described in [trac:#3371 #3371], in order to force the use of the main interpreter:
    300360{{{
    301361PythonInterpreter main_interpreter
    302362}}}
    303 This is anyway the recommended workaround for other well-known issues seen when using the Python bindings for Subversion within mod_python (#2611, #3455). See in particular Graham Dumpleton's comment in [comment:ticket:3455:9 #3455] explaining the issue.
     363This is anyway the recommended workaround for other well-known issues seen when using the Python bindings for Subversion within mod_python ([trac:#2611 #2611], [trac:#3455 #3455]). See in particular Graham Dumpleton's comment in [trac:comment:9:ticket:3455 #3455] explaining the issue.
    304364
    305365=== Page layout issues ===
     
    315375
    316376Note: For the above configuration to have any effect it must be put after the configuration of your project root location, i.e. {{{<Location /myproject />}}}.
     377
     378Also, setting `PythonOptimize On` seems to mess up the page headers and footers, in addition to hiding the documentation for macros and plugins (see #Trac8956). Considering how little effect the option has, it is probably a good idea to leave it `Off`.
    317379
    318380=== HTTPS issues ===
     
    334396
    335397=== Segmentation fault with php5-mhash or other php5 modules ===
    336 You may encounter segfaults (reported on debian etch) if php5-mhash module is installed. Try to remove it to see if this solves the problem. See debian bug report [[http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=411487]]
    337 
    338 Some people also have troubles when using php5 compiled with its own 3rd party libraries instead of system libraries. Check here [[http://www.djangoproject.com/documentation/modpython/#if-you-get-a-segmentation-fault]]
     398You may encounter segfaults (reported on debian etch) if php5-mhash module is installed. Try to remove it to see if this solves the problem. See debian bug report [http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=411487]
     399
     400Some people also have troubles when using php5 compiled with its own 3rd party libraries instead of system libraries. Check here [http://www.djangoproject.com/documentation/modpython/#if-you-get-a-segmentation-fault]
    339401
    340402----
    341 See also TracGuide, TracInstall, TracCgi, TracFastCgi
     403See also:  TracGuide, TracInstall, [wiki:TracModWSGI ModWSGI], [wiki:TracFastCgi FastCGI],  [trac:TracNginxRecipe TracNginxRecipe]