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Edit File: wiki.py

"""Wiki main program.  Imported and run by cgi3.py."""

import os, re, cgi, sys, tempfile
escape = cgi.escape

def main():
    form = cgi.FieldStorage()
    print "Content-type: text/html"
    print
    cmd = form.getvalue("cmd", "view")
    page = form.getvalue("page", "FrontPage")
    wiki = WikiPage(page)
    method = getattr(wiki, 'cmd_' + cmd, None) or wiki.cmd_view
    method(form)

class WikiPage:

homedir = tempfile.gettempdir()
    scripturl = os.path.basename(sys.argv[0])

def __init__(self, name):
        if not self.iswikiword(name):
            raise ValueError, "page name is not a wiki word"
        self.name = name
        self.load()

def cmd_view(self, form):
        print "<h1>", escape(self.splitwikiword(self.name)), "</h1>"
        print "<p>"
        for line in self.data.splitlines():
            line = line.rstrip()
            if not line:
                print "<p>"
            else:
                print self.formatline(line)
        print "<hr>"
        print "<p>", self.mklink("edit", self.name, "Edit this page") + ";"
        print self.mklink("view", "FrontPage", "go to front page") + "."

def formatline(self, line):
        words = []
        for word in re.split('(\W+)', line):
            if self.iswikiword(word):
                if os.path.isfile(self.mkfile(word)):
                    word = self.mklink("view", word, word)
                else:
                    word = self.mklink("new", word, word + "*")
            else:
                word = escape(word)
            words.append(word)
        return "".join(words)

def cmd_edit(self, form, label="Change"):
        print "<h1>", label, self.name, "</h1>"
        print '<form method="POST" action="%s">' % self.scripturl
        s = '<textarea cols="70" rows="20" name="text">%s

' print s % self.data print '' print '' % self.name print '
' print '' % label print "

" def cmd_create(self, form): self.data = form.getvalue("text", "").strip() error = self.store() if error: print "

I'm sorry. That didn't work

" print "

An error occurred while attempting to write the file:" print "

", escape(error) else: # Use a redirect directive, to avoid "reload page" problems print "" s = '' print s % (self.scripturl + "?cmd=view&page=" + self.name) print "" print "

OK

" print "

If nothing happens, please click here:", print self.mklink("view", self.name, self.name) def cmd_new(self, form): self.cmd_edit(form, label="Create") def iswikiword(self, word): return re.match("[A-Z][a-z]+([A-Z][a-z]*)+", word) def splitwikiword(self, word): chars = [] for c in word: if chars and c.isupper(): chars.append(' ') chars.append(c) return "".join(chars) def mkfile(self, name=None): if name is None: name = self.name return os.path.join(self.homedir, name + ".txt") def mklink(self, cmd, page, text): link = self.scripturl + "?cmd=" + cmd + "&page=" + page return '%s' % (link, text) def load(self): try: f = open(self.mkfile()) data = f.read().strip() f.close() except IOError: data = "" self.data = data def store(self): data = self.data try: f = open(self.mkfile(), "w") f.write(data) if data and not data.endswith('\n'): f.write('\n') f.close() return "" except IOError, err: return "IOError: %s" % str(err)