<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<link rel="STYLESHEET" href="modpython.css" type='text/css' />
<link rel="first" href="modpython.html" title='Mod_python Manual' />
<link rel='contents' href='contents.html' title="Contents" />
<link rel='index' href='genindex.html' title='Index' />
<link rel='last' href='about.html' title='About this document...' />
<link rel='help' href='about.html' title='About this document...' />
<link rel="next" href="hand-pub-alg-args.html" />
<link rel="prev" href="hand-pub-alg.html" />
<link rel="parent" href="hand-pub-alg.html" />
<link rel="next" href="hand-pub-alg-args.html" />
<meta name='aesop' content='information' />
<title>7.1.2.1 Traversal</title>
</head>
<body>
<DIV CLASS="navigation">
<div id='top-navigation-panel' xml:id='top-navigation-panel'>
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="7.1.2 The Publishing Algorithm"
href="hand-pub-alg.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="7.1.2 The Publishing Algorithm"
href="hand-pub-alg.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="7.1.2.2 Argument Matching and"
href="hand-pub-alg-args.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">Mod_python Manual</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><a rel="index" title="Index"
href="genindex.html"><img src='index.png'
border='0' height='32' alt='Index' width='32' /></A></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="hand-pub-alg.html">7.1.2 The Publishing Algorithm</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="hand-pub-alg.html">7.1.2 The Publishing Algorithm</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="hand-pub-alg-args.html">7.1.2.2 Argument Matching and</A>
</div>
<hr /></div>
</DIV>
<!--End of Navigation Panel-->
<H3><A NAME="SECTION009121000000000000000"></A><A NAME="hand-pub-alg-trav"></A>
<BR>
7.1.2.1 Traversal
</H3>
<P>
The Publisher handler locates and imports the module specified in the
URI. The module location is determined from the <tt class="class">req.filename</tt>
attribute. Before importing, the file extension, if any, is
discarded.
<P>
If <tt class="class">req.filename</tt> is empty, the module name defaults to
"<tt class="samp">index</tt>".
<P>
Once module is imported, the remaining part of the URI up to the
beginning of any query data (a.k.a. PATH_INFO) is used to find an
object within the module. The Publisher handler <i class="dfn">traverses</i> the
path, one element at a time from left to right, mapping the elements
to Python object within the module.
<P>
If no path_info was given in the URL, the Publisher handler will use
the default value of "<tt class="samp">index</tt>". If the last element is an object inside
a module, and the one immediately preceding it is a directory
(i.e. no module name is given), then the module name will also default
to "<tt class="samp">index</tt>".
<P>
The traversal will stop and <tt class="constant">HTTP_NOT_FOUND</tt> will be returned to
the client if:
<P>
<UL>
<LI>Any of the traversed object's names begin with an underscore
("<tt class="samp">_</tt>"). Use underscores to protect objects that should not be
accessible from the web.
<P>
</LI>
<LI>A module is encountered. Published objects cannot be modules for
security reasons.
<P>
</LI>
</UL>
<P>
If an object in the path could not be found, <tt class="constant">HTTP_NOT_FOUND</tt>
is returned to the client.
<P>
For example, given the following configuration:
<P>
<div class="verbatim"><pre>
DocumentRoot /some/dir
<Directory /some/dir>
SetHandler mod_python
PythonHandler mod_python.publisher
</Directory>
</pre></div>
<P>
And the following <span class="file">/some/dir/index.py</span> file:
<P>
<div class="verbatim"><pre>
def index(req):
return "We are in index()"
def hello(req):
return "We are in hello()"
</pre></div>
<P>
Then:
<P>
http://www.somehost/index/index will return "<tt class="samp">We are in index()</tt>"
<P>
http://www.somehost/index/ will return "<tt class="samp">We are in index()</tt>"
<P>
http://www.somehost/index/hello will return "<tt class="samp">We are in hello()</tt>"
<P>
http://www.somehost/hello will return "<tt class="samp">We are in hello()</tt>"
<P>
http://www.somehost/spam will return "<tt class="samp">404 Not Found</tt>"
<P>
<DIV CLASS="navigation">
<div class='online-navigation'>
<p></p><hr />
<table align="center" width="100%" cellpadding="0" cellspacing="2">
<tr>
<td class='online-navigation'><a rel="prev" title="7.1.2 The Publishing Algorithm"
href="hand-pub-alg.html"><img src='previous.png'
border='0' height='32' alt='Previous Page' width='32' /></A></td>
<td class='online-navigation'><a rel="parent" title="7.1.2 The Publishing Algorithm"
href="hand-pub-alg.html"><img src='up.png'
border='0' height='32' alt='Up One Level' width='32' /></A></td>
<td class='online-navigation'><a rel="next" title="7.1.2.2 Argument Matching and"
href="hand-pub-alg-args.html"><img src='next.png'
border='0' height='32' alt='Next Page' width='32' /></A></td>
<td align="center" width="100%">Mod_python Manual</td>
<td class='online-navigation'><a rel="contents" title="Table of Contents"
href="contents.html"><img src='contents.png'
border='0' height='32' alt='Contents' width='32' /></A></td>
<td class='online-navigation'><img src='blank.png'
border='0' height='32' alt='' width='32' /></td>
<td class='online-navigation'><a rel="index" title="Index"
href="genindex.html"><img src='index.png'
border='0' height='32' alt='Index' width='32' /></A></td>
</tr></table>
<div class='online-navigation'>
<b class="navlabel">Previous:</b>
<a class="sectref" rel="prev" href="hand-pub-alg.html">7.1.2 The Publishing Algorithm</A>
<b class="navlabel">Up:</b>
<a class="sectref" rel="parent" href="hand-pub-alg.html">7.1.2 The Publishing Algorithm</A>
<b class="navlabel">Next:</b>
<a class="sectref" rel="next" href="hand-pub-alg-args.html">7.1.2.2 Argument Matching and</A>
</div>
</div>
<hr />
<span class="release-info">Release 3.3.1, documentation updated on January 29, 2007.</span>
</DIV>
<!--End of Navigation Panel-->
</BODY>
</HTML>
distrib
>
Mandriva
>
2008.1
>
x86_64
>
media
>
contrib-release
>
by-pkgid
>
340e71071a040c53e36637aa9a238c61
>
files
>
50
