• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1"""Wiki main program.  Imported and run by cgi3.py."""
2
3import os, re, cgi, sys, tempfile
4escape = cgi.escape
5
6def main():
7    form = cgi.FieldStorage()
8    print "Content-type: text/html"
9    print
10    cmd = form.getvalue("cmd", "view")
11    page = form.getvalue("page", "FrontPage")
12    wiki = WikiPage(page)
13    method = getattr(wiki, 'cmd_' + cmd, None) or wiki.cmd_view
14    method(form)
15
16class WikiPage:
17
18    homedir = tempfile.gettempdir()
19    scripturl = os.path.basename(sys.argv[0])
20
21    def __init__(self, name):
22        if not self.iswikiword(name):
23            raise ValueError, "page name is not a wiki word"
24        self.name = name
25        self.load()
26
27    def cmd_view(self, form):
28        print "<h1>", escape(self.splitwikiword(self.name)), "</h1>"
29        print "<p>"
30        for line in self.data.splitlines():
31            line = line.rstrip()
32            if not line:
33                print "<p>"
34            else:
35                print self.formatline(line)
36        print "<hr>"
37        print "<p>", self.mklink("edit", self.name, "Edit this page") + ";"
38        print self.mklink("view", "FrontPage", "go to front page") + "."
39
40    def formatline(self, line):
41        words = []
42        for word in re.split('(\W+)', line):
43            if self.iswikiword(word):
44                if os.path.isfile(self.mkfile(word)):
45                    word = self.mklink("view", word, word)
46                else:
47                    word = self.mklink("new", word, word + "*")
48            else:
49                word = escape(word)
50            words.append(word)
51        return "".join(words)
52
53    def cmd_edit(self, form, label="Change"):
54        print "<h1>", label, self.name, "</h1>"
55        print '<form method="POST" action="%s">' % self.scripturl
56        s = '<textarea cols="70" rows="20" name="text">%s</textarea>'
57        print s % self.data
58        print '<input type="hidden" name="cmd" value="create">'
59        print '<input type="hidden" name="page" value="%s">' % self.name
60        print '<br>'
61        print '<input type="submit" value="%s Page">' % label
62        print "</form>"
63
64    def cmd_create(self, form):
65        self.data = form.getvalue("text", "").strip()
66        error = self.store()
67        if error:
68            print "<h1>I'm sorry.  That didn't work</h1>"
69            print "<p>An error occurred while attempting to write the file:"
70            print "<p>", escape(error)
71        else:
72            # Use a redirect directive, to avoid "reload page" problems
73            print "<head>"
74            s = '<meta http-equiv="refresh" content="1; URL=%s">'
75            print s % (self.scripturl + "?cmd=view&page=" + self.name)
76            print "<head>"
77            print "<h1>OK</h1>"
78            print "<p>If nothing happens, please click here:",
79            print self.mklink("view", self.name, self.name)
80
81    def cmd_new(self, form):
82        self.cmd_edit(form, label="Create")
83
84    def iswikiword(self, word):
85        return re.match("[A-Z][a-z]+([A-Z][a-z]*)+", word)
86
87    def splitwikiword(self, word):
88        chars = []
89        for c in word:
90            if chars and c.isupper():
91                chars.append(' ')
92            chars.append(c)
93        return "".join(chars)
94
95    def mkfile(self, name=None):
96        if name is None:
97            name = self.name
98        return os.path.join(self.homedir, name + ".txt")
99
100    def mklink(self, cmd, page, text):
101        link = self.scripturl + "?cmd=" + cmd + "&page=" + page
102        return '<a href="%s">%s</a>' % (link, text)
103
104    def load(self):
105        try:
106            f = open(self.mkfile())
107            data = f.read().strip()
108            f.close()
109        except IOError:
110            data = ""
111        self.data = data
112
113    def store(self):
114        data = self.data
115        try:
116            f = open(self.mkfile(), "w")
117            f.write(data)
118            if data and not data.endswith('\n'):
119                f.write('\n')
120            f.close()
121            return ""
122        except IOError, err:
123            return "IOError: %s" % str(err)
124