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<title>11. Internet Protocols and Support </title>
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<H1><A NAME="SECTION0013000000000000000000"></A><A NAME="internet"></A>
<BR>
11. Internet Protocols and Support
</H1>

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<P>
The modules described in this chapter implement Internet protocols and
support for related technology.  They are all implemented in Python.
Most of these modules require the presence of the system-dependent
module <tt class="module"><a href="module-socket.html">socket</a></tt><a id='l2h-3140' xml:id='l2h-3140'></a>, which is currently
supported on most popular platforms.  Here is an overview:

<P>
<table class='synopsistable' valign='baseline'>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-webbrowser.html'>webbrowser</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Easy-to-use controller for Web browsers.</td></tr>
  <tr><td><b><tt class='module'><a href='module-cgi.html'>cgi</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Common Gateway Interface support, used to interpret
forms in server-side scripts.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-cgitb.html'>cgitb</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Configurable traceback handler for CGI scripts.</td></tr>
  <tr><td><b><tt class='module'><a href='module-urllib.html'>urllib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Open an arbitrary network resource by URL (requires sockets).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-urllib2.html'>urllib2</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>An extensible library for opening URLs using a variety of
                protocols</td></tr>
  <tr><td><b><tt class='module'><a href='module-httplib.html'>httplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>HTTP and HTTPS protocol client (requires sockets).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-ftplib.html'>ftplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>FTP protocol client (requires sockets).</td></tr>
  <tr><td><b><tt class='module'><a href='module-gopherlib.html'>gopherlib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Gopher protocol client (requires sockets).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-poplib.html'>poplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>POP3 protocol client (requires sockets).</td></tr>
  <tr><td><b><tt class='module'><a href='module-imaplib.html'>imaplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>IMAP4 protocol client (requires sockets).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-nntplib.html'>nntplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>NNTP protocol client (requires sockets).</td></tr>
  <tr><td><b><tt class='module'><a href='module-smtplib.html'>smtplib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>SMTP protocol client (requires sockets).</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-smtpd.html'>smtpd</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Implement a flexible SMTP server</td></tr>
  <tr><td><b><tt class='module'><a href='module-telnetlib.html'>telnetlib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Telnet client class.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-urlparse.html'>urlparse</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Parse URLs into components.</td></tr>
  <tr><td><b><tt class='module'><a href='module-SocketServer.html'>SocketServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>A framework for network servers.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-BaseHTTPServer.html'>BaseHTTPServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Basic HTTP server (base class for
                <tt class="class">SimpleHTTPServer</tt> and <tt class="class">CGIHTTPServer</tt>).</td></tr>
  <tr><td><b><tt class='module'><a href='module-SimpleHTTPServer.html'>SimpleHTTPServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>This module provides a basic request handler for HTTP
                servers.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-CGIHTTPServer.html'>CGIHTTPServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>This module provides a request handler for HTTP servers
                which can run CGI scripts.</td></tr>
  <tr><td><b><tt class='module'><a href='module-cookielib.html'>cookielib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Cookie handling for HTTP clients</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-Cookie.html'>Cookie</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Support for HTTP state management (cookies).</td></tr>
  <tr><td><b><tt class='module'><a href='module-xmlrpclib.html'>xmlrpclib</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>XML-RPC client access.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-SimpleXMLRPCServer.html'>SimpleXMLRPCServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Basic XML-RPC server implementation.</td></tr>
  <tr><td><b><tt class='module'><a href='module-DocXMLRPCServer.html'>DocXMLRPCServer</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Self-documenting XML-RPC server implementation.</td></tr>
  <tr class='oddrow'>
      <td><b><tt class='module'><a href='module-asyncore.html'>asyncore</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>A base class for developing asynchronous socket
                handling services.</td></tr>
  <tr><td><b><tt class='module'><a href='module-asynchat.html'>asynchat</a></tt></b></td>
      <td>&nbsp;</td>
      <td class='synopsis'>Support for asynchronous command/response protocols.</td></tr>
</table>

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<span class="release-info">Release 2.4.2, documentation updated on 28 September 2005.</span>
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