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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <html> <head> <link rel="STYLESHEET" href="ref.css" type='text/css' /> <link rel="first" href="ref.html" title='The httplib2 Library' /> <link rel='contents' href='contents.html' title="Contents" /> <link rel='last' href='about.html' title='About this document...' /> <link rel='help' href='about.html' title='About this document...' /> <link rel="prev" href="node2.html" /> <link rel="parent" href="node2.html" /> <link rel="next" href="http-objects.html" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name='aesop' content='information' /> <title>1.1 httplib2 A comprehensive HTTP client library. </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="1. Reference" href="node2.html"><img src='previous.png' border='0' height='32' alt='Previous Page' width='32' /></a></td> <td class='online-navigation'><a rel="parent" title="1. Reference" href="node2.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="1.1.1 http Objects" href="http-objects.html"><img src='next.png' border='0' height='32' alt='Next Page' width='32' /></a></td> <td align="center" width="100%">The httplib2 Library</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'><img src='blank.png' border='0' height='32' alt='' width='32' /></td> </tr></table> <div class='online-navigation'> <b class="navlabel">Previous:</b> <a class="sectref" rel="prev" href="node2.html">1. Reference</a> <b class="navlabel">Up:</b> <a class="sectref" rel="parent" href="node2.html">1. Reference</a> <b class="navlabel">Next:</b> <a class="sectref" rel="next" href="http-objects.html">1.1.1 Http Objects</a> </div> <hr /></div> </div> <!--End of Navigation Panel--> <h1><a name="SECTION002100000000000000000"> 1.1 <tt class="module">httplib2</tt> A comprehensive HTTP client library. </a> </h1> <p> <a name="module-httplib2"></a> <p> <p> <p> The <tt class="module">httplib2</tt> module is a comprehensive HTTP client library with the following features: <p> <dl> <dt><strong>HTTP and HTTPS</strong></dt> <dd>HTTPS support is only available if the socket module was compiled with SSL support. </dd> <dt><strong>Keep-Alive</strong></dt> <dd>Supports HTTP 1.1 Keep-Alive, keeping the socket open and performing multiple requests over the same connection if possible. </dd> <dt><strong>Authentication</strong></dt> <dd>The following three types of HTTP Authentication are supported. These can be used over both HTTP and HTTPS. <ul> <li>Digest </li> <li>Basic </li> <li>WSSE </li> </ul> </dd> <dt><strong>Caching</strong></dt> <dd>The module can optionally operate with a private cache that understands the Cache-Control: header and uses both the ETag and Last-Modified cache validators. </dd> <dt><strong>All Methods</strong></dt> <dd>The module can handle any HTTP request method, not just GET and POST. </dd> <dt><strong>Redirects</strong></dt> <dd>Automatically follows 3XX redirects on GETs. </dd> <dt><strong>Compression</strong></dt> <dd>Handles both 'deflate' and 'gzip' types of compression. </dd> <dt><strong>Proxies</strong></dt> <dd>If the Socksipy module is installed then httplib2 can handle sock4, sock5 and http proxies. </dd> <dt><strong>Lost update support</strong></dt> <dd>Automatically adds back ETags into PUT requests to resources we have already cached. This implements Section 3.2 of Detecting the Lost Update Problem Using Unreserved Checkout </dd> </dl> <p> The <tt class="module">httplib2</tt> module defines the following variables: <p> <dl><dt><b><tt id='l2h-2' xml:id='l2h-2'>debuglevel</tt></b></dt> <dd> The amount of debugging information to print. The default is 0. </dd></dl> <p> The <tt class="module">httplib2</tt> module may raise the following Exceptions. Note that there is an option that turns exceptions into normal responses with an HTTP status code indicating an error occured. See <tt class="member">Http.force_exception_to_status_code</tt> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-3' xml:id='l2h-3' class="exception">HttpLib2Error</tt></b></dt> <dd> The Base Exception for all exceptions raised by httplib2. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-4' xml:id='l2h-4' class="exception">RedirectMissingLocation</tt></b></dt> <dd> A 3xx redirect response code was provided but no Location: header was provided to point to the new location. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-5' xml:id='l2h-5' class="exception">RedirectLimit</tt></b></dt> <dd> The maximum number of redirections was reached without coming to a final URI. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-6' xml:id='l2h-6' class="exception">ServerNotFoundError</tt></b></dt> <dd> Unable to resolve the host name given. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-7' xml:id='l2h-7' class="exception">RelativeURIError</tt></b></dt> <dd> A relative, as opposed to an absolute URI, was passed into request(). </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-8' xml:id='l2h-8' class="exception">FailedToDecompressContent</tt></b></dt> <dd> The headers claimed that the content of the response was compressed but the decompression algorithm applied to the content failed. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-9' xml:id='l2h-9' class="exception">UnimplementedDigestAuthOptionError</tt></b></dt> <dd> The server requested a type of Digest authentication that we are unfamiliar with. </dd></dl> <p> <dl><dt><b><span class="typelabel">exception</span> <tt id='l2h-10' xml:id='l2h-10' class="exception">UnimplementedHmacDigestAuthOptionError</tt></b></dt> <dd> The server requested a type of HMACDigest authentication that we are unfamiliar with. </dd></dl> <p> <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-11' xml:id='l2h-11' class="class">Http</tt></b>(</nobr></td> <td><var></var><big>[</big><var>cache=None</var><big>]</big><var>, </var><big>[</big><var>timeout=None</var><big>]</big><var>, </var><big>[</big><var>proxy_info=None</var><big>]</big><var></var>)</td></tr></table></dt> <dd> The class that represents a client HTTP interface. The <var>cache</var> parameter is either the name of a directory to be used as a flat file cache, or it must an object that implements the required caching interface. The <var>timeout</var> parameter is the socket level timeout. The <var>proxy_info</var> is an instance of <tt class="class">ProxyInfo</tt> and is supplied if a proxy is to be used. Note that the Socksipy module must be installed for proxy support to work. </dl> <p> <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-12' xml:id='l2h-12' class="class">Response</tt></b>(</nobr></td> <td><var>info</var>)</td></tr></table></dt> <dd> Response is a subclass of <tt class="class">dict</tt> and instances of this class are returned from calls to Http.request. The <var>info</var> parameter is either an <tt class="class">rfc822.Message</tt> or an <tt class="class">httplib.HTTPResponse</tt> object. </dl> <p> <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-13' xml:id='l2h-13' class="class">FileCache</tt></b>(</nobr></td> <td><var>dir_name, </var><big>[</big><var>safe=safename</var><big>]</big><var></var>)</td></tr></table></dt> <dd> FileCache implements a Cache as a directory of files. The <var>dir_name</var> parameter is the name of the directory to use. If the directory does not exist then FileCache attempts to create the directory. The optional <var>safe</var> parameter is a funtion which generates the cache filename for each URI. A FileCache object is constructed and used for caching when you pass a directory name into the constructor of <tt class="class">Http</tt>. </dl> <p> <dl><dt><table cellpadding="0" cellspacing="0"><tr valign="baseline"> <td><nobr><b><span class="typelabel">class</span> <tt id='l2h-14' xml:id='l2h-14' class="class">ProxyInfo</tt></b>(</nobr></td> <td><var>proxy_type, proxy_host, proxy_port, </var><big>[</big><var>proxy_rdns=None</var><big>]</big><var>, </var><big>[</big><var>proxy_user=None</var><big>]</big><var>, </var><big>[</big><var>proxy_pass=None</var><big>]</big><var></var>)</td></tr></table></dt> <dd> The parameter <var>proxy_type</var> must be set to one of socks.PROXY_TYPE_XXX constants. The <var>proxy_host</var> and <var>proxy_port</var> must be set to the location of the proxy. The optional <var>proxy_rdns</var> should be set to True if the DNS server on the proxy should be used. The <var>proxy_user</var> and <var>proxy_pass</var> are supplied when the proxy is protected by authentication. </dl> <p> <p><br /></p><hr class='online-navigation' /> <div class='online-navigation'> <!--Table of Child-Links--> <a name="CHILD_LINKS"><strong>Subsections</strong></a> <ul class="ChildLinks"> <li><a href="http-objects.html">1.1.1 Http Objects</a> <li><a href="cache-objects.html">1.1.2 Cache Objects</a> <li><a href="response-objects.html">1.1.3 Response Objects</a> <li><a href="httplib2-example.html">1.1.4 Examples</a> </ul> <!--End of Table of Child-Links--> </div> <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="1. Reference" href="node2.html"><img src='previous.png' border='0' height='32' alt='Previous Page' width='32' /></a></td> <td class='online-navigation'><a rel="parent" title="1. Reference" href="node2.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="1.1.1 http Objects" href="http-objects.html"><img src='next.png' border='0' height='32' alt='Next Page' width='32' /></a></td> <td align="center" width="100%">The httplib2 Library</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'><img src='blank.png' border='0' height='32' alt='' width='32' /></td> </tr></table> <div class='online-navigation'> <b class="navlabel">Previous:</b> <a class="sectref" rel="prev" href="node2.html">1. Reference</a> <b class="navlabel">Up:</b> <a class="sectref" rel="parent" href="node2.html">1. Reference</a> <b class="navlabel">Next:</b> <a class="sectref" rel="next" href="http-objects.html">1.1.1 Http Objects</a> </div> </div> <hr /> <span class="release-info">Release 0.3, documentation updated on Mar 8, 2007.</span> </div> <!--End of Navigation Panel--> </body> </html>
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