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Name: [011] John Montgomery
Member: 106 months
Authored: 21 videos
Description: I'm a C/C++, Java and Python programmer living in Hove, UK. ...

Writing a Python CGI Wiki - viewing pages [ID:663] (4/6)

in series: Introduction to Python web-programming: CGI

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In this ShowMeDo I start creating a simple wiki that stores it's "wiki text" on the file system. I demonstrate how you can use basic parameters to choose which page to view.

At this point we have the basic code to start writing a real wiki. The next episodes will demonstrate how to use forms to let users create and edit wiki pages. We will also cover how to use regular expressions to identify "wiki words" and have them automatically turned into links - just like a real wiki.

#!/usr/bin/python

import cgi
import cgitb; cgitb.enable()
import os
import urllib

CONTENTS_DIR="contents"

def page_file_name(page):
    file_name="%s.txt" % urllib.quote_plus(page)
    return os.path.join(CONTENTS_DIR,file_name)

def page_contents(page):
    file_name=page_file_name(page)
    if not os.path.exists(file_name):
        return None
    return file(file_name).read()

def page_header(title):
    print "Content-Type: text/html"
    print
    print "<!DOCTYPE html PUBLIC '-//W3C//DTD XHTML 1.0 Transitional//EN' 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt'>"
    print "<html xmlns='http://www.w3.org/1999/xhtml'>"
    print "<head>"
    print "<title>%s</title>" % cgi.escape(title)
    print "</head>"
    print "<body>"

def page_footer():
    print "</body>"
    print "</html>"

def view_page(page,params):
    contents=page_contents(page)
    if contents is None:
		contents='page not found'
    #    edit_page(page,params)
    #    return
    
    page_header(page)
    print "<h1>%s</h1>" % cgi.escape(page)
    print "<div class='contents'>"
    print cgi.escape(contents)
    print "</div>"
    page_footer()

def execute(params):
    page=params.getfirst('page','main')
    view_page(page,params)

params=cgi.FieldStorage()
execute(params)

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  • Published: 80 months ago

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I can't wait to get my own custom python wiki going. This is awesome.


Wow, to think we're constructing the framework that Wikipedia is based on... This is pretty cool.


Video published, thanks for contributing to ShowMeDo


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Kudos and Thanks for John

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