Changes between Version 1 and Version 2 of TracCgi


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Timestamp:
Nov 1, 2019, 11:11:25 AM (5 years ago)
Author:
trac
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  • TracCgi

    v1 v2  
    1 = Installing Trac as CGI =
     1= Installing Trac as CGI
     2[[TracGuideToc]]
     3[[PageOutline]]
    24
    3 To install Trac as a CGI script, you need to make the `trac.cgi` executable as a CGI by your web server.
    4 
    5   ''Please note that using Trac via CGI is significantly slower than any other deployment method, such as [TracModPython mod_python] or [TracFastCgi FastCGI].''
    6 
    7 If you're using [http://httpd.apache.org/ Apache HTTPD], there are a couple ways to do that:
    8 
    9  1. Use a `ScriptAlias` to map a URL to the `trac.cgi` script
    10  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.
    11 
    12 The first option is recommended as it also allows you to map the CGI to a friendly URL.
    13 
    14 Now, edit the Apache configuration file and add this snippet, file names and locations changed to match your installation:
    15 {{{
    16 ScriptAlias /trac /usr/share/trac/cgi-bin/trac.cgi
     5{{{#!div class=important
     6 ''Please note that using Trac via CGI is the slowest deployment method available. It is slower than [wiki:TracModWSGI mod_wsgi], [TracModPython mod_python], [TracFastCgi FastCGI] and even [trac:TracOnWindowsIisAjp IIS/AJP] on Windows.''
    177}}}
    188
    19  ''Note that this directive requires the `mod_alias` module to be installed and enabled.''
     9CGI script is the entrypoint that web-server calls when a web-request to an application is made. The `trac.cgi` script can be created using the `trac-admin <env> deploy <dir>` command which automatically substitutes the required paths, see TracInstall#cgi-bin. Make sure the script is executable by your web server.
     10
     11== Apache web-server configuration
     12
     13In [http://httpd.apache.org/ Apache] there are two ways to run Trac as CGI:
     14
     15 1. Use a `ScriptAlias` directive that maps a URL to the `trac.cgi` script (recommended)
     16 1. 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.
     17
     18To make Trac available at `http://yourhost.example.org/trac` add `ScriptAlias` directive to Apache configuration file, changing `trac.cgi` path to match your installation:
     19{{{#!apache
     20ScriptAlias /trac /path/to/www/trac/cgi-bin/trac.cgi
     21}}}
     22
     23 ''Note that this directive requires that the `mod_alias` module is enabled.''
    2024
    2125If you're using Trac with a single project you need to set its location using the `TRAC_ENV` environment variable:
    22 {{{
     26{{{#!apache
    2327<Location "/trac">
    2428  SetEnv TRAC_ENV "/path/to/projectenv"
    … …  
    2731
    2832Or to use multiple projects you can specify their common parent directory using the `TRAC_ENV_PARENT_DIR` variable:
    29 {{{
     33{{{#!apache
    3034<Location "/trac">
    3135  SetEnv TRAC_ENV_PARENT_DIR "/path/to/project/parent/dir"
    … …  
    3337}}}
    3438
    35  ''Note that the `SetEnv` directive requires the `mod_env` module to be installed and enable.''
     39  ''Note that the `SetEnv` directive requires that the `mod_env` module is enabled.''
    3640
    37 This will make Trac available at `http://yourhost.example.org/trac`.
     41An alternative to `SetEnv` is editing `TRAC_ENV` or `TRAC_ENV_PARENT_DIR` in `trac.cgi`:
    3842
    39 If you are using the [http://httpd.apache.org/docs/suexec.html Apache suEXEC] feature please see [http://trac.edgewall.org/wiki/ApacheSuexec].
    40 
    41 On some systems, you ''may'' need to edit the shebang line in the `trac.cgi` file to point to your real Python installation path. On a Windows system you may need to configure Windows to know how to execute a .cgi file (Explorer -> Tools -> Folder Options -> File Types -> CGI).
    42 
    43 == Mapping Static Resources ==
    44 
    45 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.
    46 
    47 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.
    48 
    49 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:
    50 {{{
    51 Alias /trac/chrome/common /usr/share/trac/htdocs
    52 <Directory "/usr/share/trac/htdocs">
    53   Order allow,deny
    54   Allow from all
    55 </Directory>
     43{{{#!python
     44    os.environ['TRAC_ENV'] = "/path/to/projectenv"
    5645}}}
    5746
    58 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.
    59 
    60 For 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`.
    61 
    62 Alternatively, you can set the `htdocs_location` configuration option in [wiki:TracIni trac.ini]:
    63 {{{
    64 [trac]
    65 htdocs_location = /trac-htdocs
     47{{{#!python
     48    os.environ['TRAC_ENV_PARENT_DIR'] = "/path/to/parent/dir"
    6649}}}
    6750
    68 Trac 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:
    69 {{{
    70 $ ln -s /usr/share/trac/htdocs /var/www/your_site.com/htdocs/trac-htdocs
     51If you are using the [http://httpd.apache.org/docs/suexec.html Apache suEXEC] feature please see [trac:ApacheSuexec].
     52
     53On some systems, you ''may'' need to edit the shebang line in the `trac.cgi` file to point to your real Python installation path. On a Windows system you may need to configure Windows to know how to execute a `.cgi` file (Explorer -> Tools -> Folder Options -> File Types -> CGI).
     54
     55=== Python Egg Cache
     56
     57The [TracInstall#egg-cache egg-cache] can be configured using an `os.environ` statement in `trac.cgi`, as shown above.
     58To do the same from the Apache configuration, use the `SetEnv` directive:
     59{{{#!apache
     60SetEnv PYTHON_EGG_CACHE /path/to/dir
    7161}}}
    7262
    73 == Adding Authentication ==
     63Put this directive next to where you set the path to the [TracEnvironment Trac environment], i.e. in the same `<Location>` block.
    7464
    75 The simplest way to enable authentication with Apache is to create a password file. Use the `htpasswd` program to create the password file:
    76 {{{
    77 $ htpasswd -c /somewhere/trac.htpasswd admin
    78 New password: <type password>
    79 Re-type new password: <type password again>
    80 Adding password for user admin
     65{{{#!apache
     66 <Location /trac>
     67   SetEnv TRAC_ENV /path/to/projenv
     68   SetEnv PYTHON_EGG_CACHE /path/to/dir
     69 </Location>
    8170}}}
    8271
    83 After the first user, you dont need the "-c" option anymore:
    84 {{{
    85 $ htpasswd /somewhere/trac.htpasswd john
    86 New password: <type password>
    87 Re-type new password: <type password again>
    88 Adding password for user john
    89 }}}
    9072
    91   ''See the man page for `htpasswd` for full documentation.''
    9273
    93 After you've created the users, you can set their permissions using TracPermissions.
     74=== Using WSGI
    9475
    95 Now, you'll need to enable authentication against the password file in the Apache configuration:
    96 {{{
    97 <Location "/trac/login">
    98   AuthType Basic
    99   AuthName "Trac"
    100   AuthUserFile /somewhere/trac.htpasswd
    101   Require valid-user
    102 </Location>
    103 }}}
     76You can run a [http://henry.precheur.org/python/how_to_serve_cgi WSGI handler] [http://pythonweb.org/projects/webmodules/doc/0.5.3/html_multipage/lib/example-webserver-web-wsgi-simple-cgi.html under CGI].  You can [wiki:TracModWSGI#Thetrac.wsgiscript write your own application function], or use the deployed trac.wsgi's application.
    10477
    105 If you're hosting multiple projects you can use the same password file for all of them:
    106 {{{
    107 <LocationMatch "/trac/[^/]+/login">
    108   AuthType Basic
    109   AuthName "Trac"
    110   AuthUserFile /somewhere/trac.htpasswd
    111   Require valid-user
    112 </LocationMatch>
    113 }}}
     78== Mapping Static Resources
    11479
    115 For better security, it is recommended that you either enable SSL or at least use the “Digest” authentication scheme instead of “Basic”. Please read the [http://httpd.apache.org/docs/2.0/ Apache HTTPD documentation] to find out more.
     80See TracInstall#MappingStaticResources.
     81
     82== Adding Authentication
     83
     84See TracInstall#ConfiguringAuthentication.
    11685
    11786----
    118 See also:  TracGuide, TracInstall, TracFastCgi, TracModPython
     87See also:  TracInstall, [wiki:TracModWSGI], TracFastCgi, TracModPython