Changes between Version 2 and Version 3 of TracCgi


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Timestamp:
Jan 13, 2012, 11:25:02 PM (13 years ago)
Author:
trac
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  • TracCgi

    v2 v3  
    11= Installing Trac as CGI =
    2 
    3 To install Trac as a CGI script, you need to make the `trac.cgi` executable as a CGI by your web server.
    42
    53{{{
    64#!div class=important
    7   ''Please note that using Trac via CGI is significantly slower than any other deployment method, such as [TracModPython mod_python] or [TracFastCgi FastCGI] or even [trac:TracOnWindowsIisAjp IIS/AJP] on Windows.''
     5  ''Please note that using Trac via CGI is the slowest deployment method available. It is slower than [TracModPython mod_python], [TracFastCgi FastCGI] and even [trac:TracOnWindowsIisAjp IIS/AJP] on Windows.''
    86}}}
    97
    10 If you're using [http://httpd.apache.org/ Apache HTTPD], there are a couple ways to do that:
     8CGI script is the entrypoint that web-server calls when a web-request to an application is made. To generate the `trac.cgi` script run:
     9{{{
     10trac-admin /path/to/env deploy /path/to/www/trac
     11}}}
     12`trac.cgi` will be in the `cgi-bin` folder inside the given path. Make sure it is executable by your web server. This command also copies `static resource` files to a `htdocs` directory of a given destination.
    1113
    12  1. Use a `ScriptAlias` to map a URL to the `trac.cgi` script
    13  2. Copy the `trac.cgi` file into the directory for CGI executables used by your web server (commonly named `cgi-bin`). A word of warning, copying the file directly from the repository onto a windows server 2003 machine created difficulties. Rather create a new text file and cut and copy the text into the newly created file. You can also create a symbolic link, but in that case make sure that the `FollowSymLinks` option is enabled for the `cgi-bin` directory.
     14== Apache web-server configuration ==
    1415
    15 The first option is recommended as it also allows you to map the CGI to a friendly URL.
     16In [http://httpd.apache.org/ Apache] there are two ways to run Trac as CGI:
    1617
    17 Now, edit the Apache configuration file and add this snippet, file names and locations changed to match your installation:
     18 1. Use a `ScriptAlias` directive that maps an URL to the `trac.cgi` script (recommended)
     19 2. Copy the `trac.cgi` file into the directory for CGI executables used by your web server (commonly named `cgi-bin`). You can also create a symbolic link, but in that case make sure that the `FollowSymLinks` option is enabled for the `cgi-bin` directory.
     20
     21To make Trac available at `http://yourhost.example.org/trac` add `ScriptAlias` directive to Apache configuration file, changing `trac.cgi` path to match your installation:
    1822{{{
    19 ScriptAlias /trac /usr/share/trac/cgi-bin/trac.cgi
     23ScriptAlias /trac /path/to/www/trac/cgi-bin/trac.cgi
    2024}}}
    2125
    22  ''Note that this directive requires the `mod_alias` module to be installed and enabled.''
     26 ''Note that this directive requires enabled `mod_alias` module.''
    2327
    2428If you're using Trac with a single project you need to set its location using the `TRAC_ENV` environment variable:
    … …  
    3640}}}
    3741
    38  ''Note that the `SetEnv` directive requires the `mod_env` module to be installed and enable. If not, you could set TRAC_ENV in trac.cgi. Just add the following code between "try:" and "from trac.web ...":''
     42 ''Note that the `SetEnv` directive requires enabled `mod_env` module. It is also possible to set TRAC_ENV in trac.cgi. Just add the following code between "try:" and "from trac.web ...":''
    3943
    4044{{{
    … …  
    5054}}}
    5155
    52 This will make Trac available at `http://yourhost.example.org/trac`.
    53 
    5456If you are using the [http://httpd.apache.org/docs/suexec.html Apache suEXEC] feature please see [http://trac.edgewall.org/wiki/ApacheSuexec].
    5557
    … …  
    5860== Mapping Static Resources ==
    5961
    60 Out of the box, Trac will serve static resources such as style sheets or images itself. For a CGI setup, though, this is highly undesirable, because it results in the CGI script being invoked for documents that could be much more efficiently served by the web server directly.
     62Out of the box, Trac will pass static resources such as style sheets or images through itself. For a CGI setup this is '''highly undesirable''', because this way CGI script is invoked for documents that could be much more efficiently served directly by web server.
    6163
    62 Web servers such as [http://httpd.apache.org/ Apache HTTPD] allow you to create “Aliases” to resources, thereby giving them a virtual URL that doesn't necessarily bear any resemblance to the layout of the servers file system. We already used this capability above when defining a `ScriptAlias` for the CGI script, and we'll use it now to map requests to the static resources to the directory on the file system that contains them, thereby bypassing the processing of such requests by the CGI script.
     64Web servers such as [http://httpd.apache.org/ Apache] allow you to create “Aliases” to resources, giving them a virtual URL that doesn't necessarily reflect the layout of the servers file system. We already used this capability by defining a `ScriptAlias` for the CGI script. We also can map requests for static resources directly to the directory on the file system, avoiding processing these requests by CGI script.
    6365
    64 Edit the Apache configuration file again and add the following snippet '''before''' the `ScriptAlias` for the CGI script , file names and locations changed to match your installation:
     66There are two primary URL paths for static resources - `/chrome/common` and `/chrome/site`. Plugins can add their own resources usually accessible by `/chrome/plugin` path, so its important to override only known paths and not try to make universal `/chrome` alias for everything.
     67
     68Add the following snippet to Apache configuration '''before''' the `ScriptAlias` for the CGI script, changing paths to match your deployment:
    6569{{{
    66 Alias /trac/chrome/common /usr/share/trac/htdocs
    67 <Directory "/usr/share/trac/htdocs">
     70Alias /trac/chrome/common /path/to/trac/htdocs/common
     71Alias /trac/chrome/site /path/to/trac/htdocs/site
     72<Directory "/path/to/www/trac/htdocs">
    6873  Order allow,deny
    6974  Allow from all
    … …  
    7176}}}
    7277
    73 Note that whatever URL path you mapped the `trac.cgi` script to, the path `/chrome/common` is the path you have to append to that location to intercept requests to the static resources.
     78If using mod_python, you might want to add this too (otherwise, the alias will be ignored):
     79{{{
     80<Location "/trac/chrome/common/">
     81  SetHandler None
     82</Location>
     83}}}
     84
     85Note that we mapped `/trac` part of the URL to the `trac.cgi` script, and the path `/chrome/common` is the path you have to append to that location to intercept requests to the static resources.
    7486
    7587For example, if Trac is mapped to `/cgi-bin/trac.cgi` on your server, the URL of the Alias should be `/cgi-bin/trac.cgi/chrome/common`.
    7688
    77 Similarly, if you have static resources in a projects htdocs directory, you can configure apache to serve those resources (again, put this '''before''' the `ScriptAlias` for the CGI script, and adjust names and locations to match your installation):
     89Similarly, if you have static resources in a project's htdocs directory (which is referenced by /chrome/site URL in themes), you can configure Apache to serve those resources (again, put this '''before''' the `ScriptAlias` for the CGI script, and adjust names and locations to match your installation):
    7890
    7991{{{
    … …  
    8597}}}
    8698
    87 Alternatively, you can set the `htdocs_location` configuration option in [wiki:TracIni trac.ini]:
     99Alternatively to hacking `/trac/chrome/site`, you can directly specify path to static resources using `htdocs_location` configuration option in [wiki:TracIni trac.ini]:
    88100{{{
    89101[trac]
    90 htdocs_location = /trac-htdocs
     102htdocs_location = http://yourhost.example.org/trac-htdocs
    91103}}}
    92104
    93105Trac will then use this URL when embedding static resources into HTML pages. Of course, you still need to make the Trac `htdocs` directory available through the web server at the specified URL, for example by copying (or linking) the directory into the document root of the web server:
    94106{{{
    95 $ ln -s /usr/share/trac/htdocs /var/www/your_site.com/htdocs/trac-htdocs
     107$ ln -s /path/to/www/trac/htdocs /var/www/yourhost.example.org/trac-htdocs
    96108}}}
    97109
    … …  
    160172
    161173----
    162 See also:  TracGuide, TracInstall, wiki:TracModWSGI, TracFastCgi, TracModPython
     174See also:  TracGuide, TracInstall, [wiki:TracModWSGI], TracFastCgi, TracModPython