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message = form.getvalue("message", "(no message)") |
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| == Notes == Instead of checking if key exists and then using `form[key].value`, you can just use shortcut `form.getvalue(key, default)` For troubleshooting, you should include lines `import cgitb; cgitb.enable` to head of you CGI script. |
CGI Scripts
The [http://www.python.org/doc/current/lib/module-cgi.html cgi module] is at the core of the Python CGI scripts.
Basically, you just need to print out an HTTP header ("Content-type: text/html"), a web page, and handle any forms you may have received.
Getting Apache's permissions just right can be annoying, and is sadly beyond this page's scope.
Sample Code
1 #!/usr/bin/env python
2
3 import cgi
4 import cgitb; cgitb.enable() # for troubleshooting
5
6 print "Content-type: text/html"
7 print
8
9 print """
10 <html>
11
12 <head><title>Sample CGI Script</title></head>
13
14 <body>
15
16 <h3> Sample CGI Script </h3>
17 """
18
19 form = cgi.FieldStorage()
20 message = form.getvalue("message", "(no message)")
21
22 print """
23
24 <p>Previous message: %s</p>
25
26 <p>form:</p>
27
28 <form method="post" action="index.cgi">
29 <p>message: <input type="text" name="message"/></p>
30 </form>
31
32 </body>
33
34 </html>
35 """ % message
See Also
[http://www.python.org/doc/current/lib/module-cgi.html cgi module documentation]
[http://www.python.org/doc/current/lib/module-Cookie.html Cookie module documentation]
[http://www.cs.virginia.edu/~lab2q/lesson_7/ python CGI tutorial] - w/ hints about maintaining sessions either through forms or through cookies
[http://gnosis.cx/publish/programming/feature_5min_python.html python CGI tutorial] - w/ hints about printing out tracebacks
[http://www.python.org/doc/current/lib/internet.html other internet protocol module documentation]
[http://www.devshed.com/index2.php?option=content&task=view&id=198&pop=1&page=0&hide_js=1 Writing CGI Scripts in Python]
[http://www.voidspace.org.uk/python/cgi.shtml Voidspace Python CGI collection] - Working Python CGI scripts to use and/or study
Discussion
- We need a good python CGI framework - Sridhar R
Nevow and [http://srid.bsdnerds.org/hacking/wallaby/ Wallaby]