mņ ž¢ęCc@sdZdZdZdkZdkZdkZeedƒp eiZn eiZdk Z e i djodZ dZ dZ nCdkZeifZ eieieifZ eieifZ [[ dad „Zd „ZeiZd efd „ƒYZd klZlZeedd„Zdfd„ƒYZdfd„ƒYZ eedƒpeie_ee_n[eZdS(s›Timeout Socket This module enables a timeout mechanism on all TCP connections. It does this by inserting a shim into the socket module. After this module has been imported, all socket creation goes through this shim. As a result, every TCP connection will support a timeout. The beauty of this method is that it immediately and transparently enables the entire python library to support timeouts on TCP sockets. As an example, if you wanted to SMTP connections to have a 20 second timeout: import timeoutsocket import smtplib timeoutsocket.setDefaultSocketTimeout(20) The timeout applies to the socket functions that normally block on execution: read, write, connect, and accept. If any of these operations exceeds the specified timeout, the exception Timeout will be raised. The default timeout value is set to None. As a result, importing this module does not change the default behavior of a socket. The timeout mechanism only activates when the timeout has been set to a numeric value. (This behavior mimics the behavior of the select.select() function.) This module implements two classes: TimeoutSocket and TimeoutFile. The TimeoutSocket class defines a socket-like object that attempts to avoid the condition where a socket may block indefinitely. The TimeoutSocket class raises a Timeout exception whenever the current operation delays too long. The TimeoutFile class defines a file-like object that uses the TimeoutSocket class. When the makefile() method of TimeoutSocket is called, it returns an instance of a TimeoutFile. Each of these objects adds two methods to manage the timeout value: get_timeout() --> returns the timeout of the socket or file set_timeout() --> sets the timeout of the socket or file As an example, one might use the timeout feature to create httplib connections that will timeout after 30 seconds: import timeoutsocket import httplib H = httplib.HTTP("www.python.org") H.sock.set_timeout(30) Note: When used in this manner, the connect() routine may still block because it happens before the timeout is set. To avoid this, use the 'timeoutsocket.setDefaultSocketTimeout()' function. Good Luck! s$Revision: 1.1.1.1 $s$Timothy O'Malley Nt_no_timeoutsockettnti&'iH'i3'cCs |adS(N(ttimeoutt_DefaultTimeout(R((tK/home/users/jdub/public_html/bzr/planet/devel/trunk/planet/timeoutsocket.pytsetDefaultSocketTimeout}scCstS(N(R(((RtgetDefaultSocketTimeout€stTimeoutcBstZRS(N(t__name__t __module__(((RR‡s(sAF_INETs SOCK_STREAMcCs\|tjp |tjo,|ot|||ƒSqFt||ƒSntt||ƒtƒS(N(tfamilytAF_INETttypet SOCK_STREAMtprotot_sockett TimeoutSocketR(R R R((Rt timeoutsockets RcBsžtZdZdZdZd„Zd„Zd„Zed„Z d„Z d„Z eed „Z ed „Z dd „Zdd „Zd dd„Zd„ZRS(sĻTimeoutSocket object Implements a socket-like object that raises Timeout whenever an operation takes too long. 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