1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
|
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>Bozo Detection [Universal Feed Parser]</title>
<link rel="stylesheet" href="feedparser.css" type="text/css">
<link rev="made" href="mailto:mark@diveintomark.org">
<meta name="generator" content="DocBook XSL Stylesheets V1.65.1">
<meta name="keywords" content="RSS, Atom, CDF, XML, feed, parser, Python">
<link rel="start" href="index.html" title="Documentation">
<link rel="up" href="advanced.html" title="Advanced Features">
<link rel="prev" href="character-encoding.html" title="Character Encoding Detection">
<link rel="next" href="http.html" title="HTTP Features">
</head>
<body id="feedparser-org" class="docs">
<div class="z" id="intro"><div class="sectionInner"><div class="sectionInner2">
<div class="s" id="pageHeader">
<h1><a href="/"><span>Universal Feed Parser</span></a></h1>
<p><span>Parse RSS and Atom feeds in Python. 3000 unit tests. Open source.</span></p>
</div>
<div class="s" id="quickSummary"><ul>
<li class="li1">
<a href="http://sourceforge.net/projects/feedparser/"><span>Download</span></a> ·</li>
<li class="li2">
<a href="http://feedparser.org/docs/"><span>Documentation</span></a> ·</li>
<li class="li3">
<a href="http://feedparser.org/tests/"><span>Unit tests</span></a> ·</li>
<li class="li4"><a href="http://sourceforge.net/tracker/?func=browse&group_id=112328&atid=661937"><span>Report a bug</span></a></li>
</ul></div>
</div></div></div>
<div id="main"><div id="mainInner">
<p id="breadcrumb">You are here: <a href="index.html">Documentation</a> → <a href="advanced.html">Advanced Features</a> → <span class="thispage">Bozo Detection</span></p>
<div class="section" lang="en">
<div class="titlepage">
<div>
<div><h2 class="title">
<a name="advanced.bozo" class="skip" href="#advanced.bozo" title="link to this section"><img src="images/permalink.gif" alt="[link]" title="link to this section" width="8" height="9"></a> Bozo Detection</h2></div>
<div><div class="abstract">
<h3 class="title"></h3>
<p><span class="application">Universal Feed Parser</span> can parse feeds whether they are well-formed <acronym title="Extensible Markup Language">XML</acronym> or not. However, since some applications may wish to reject or warn users about non-well-formed feeds, <span class="application">Universal Feed Parser</span> sets the <tt class="varname">bozo</tt> bit when it detects that a feed is not well-formed. Thanks to <a href="http://www.tbray.org/ongoing/When/200x/2004/01/11/PostelPilgrim">Tim Bray</a> for suggesting this terminology.</p>
</div></div>
</div>
<div></div>
</div>
<div class="example">
<a name="example.bozo" class="skip" href="#example.bozo" title="link to this example"><img src="images/permalink.gif" alt="[link]" title="link to this example" width="8" height="9"></a> <h3 class="title">Example: Detecting a non-well-formed feed</h3>
<pre class="screen">
<tt class="prompt">>>> </tt><span class="userinput">d = feedparser.parse('<a href="http://feedparser.org/docs/examples/atom10.xml">http://feedparser.org/docs/examples/atom10.xml</a>')</span>
<tt class="prompt">>>> </tt><span class="userinput">d.bozo</span>
<span class="computeroutput">0</span>
<tt class="prompt">>>> </tt><span class="userinput">d = feedparser.parse('<a href="http://feedparser.org/tests/illformed/rss/aaa_illformed.xml">http://feedparser.org/tests/illformed/rss/aaa_illformed.xml</a>')</span>
<tt class="prompt">>>> </tt><span class="userinput">d.bozo</span>
<span class="computeroutput">1</span>
<tt class="prompt">>>> </tt><span class="userinput">d.bozo_exception</span>
<span class="computeroutput"><xml.sax._exceptions.SAXParseException instance at 0x00BAAA08></span>
<tt class="prompt">>>> </tt><span class="userinput">exc = d.bozo_exception</span>
<tt class="prompt">>>> </tt><span class="userinput">exc.getMessage()</span>
<span class="computeroutput">"expected '>'\n"</span>
<tt class="prompt">>>> </tt><span class="userinput">exc.getLineNumber()</span>
<span class="computeroutput">6</span>
</pre>
</div>
<p>There are many reasons an <acronym title="Extensible Markup Language">XML</acronym> document could be non-well-formed besides this example (incomplete end tags) See <a href="character-encoding.html" title="Character Encoding Detection">Character Encoding Detection</a> for some other ways to trip the bozo bit.</p>
</div>
<div style="float: left">← <a class="NavigationArrow" href="character-encoding.html">Character Encoding Detection</a>
</div>
<div style="text-align: right">
<a class="NavigationArrow" href="http.html">HTTP Features</a> →</div>
<hr style="clear:both">
<div class="footer"><p class="copyright">Copyright © 2004, 2005, 2006 Mark Pilgrim</p></div>
</div></div>
</body>
</html>
|
