Mailman 3 April 2010 - Twisted

[Twisted-Python] cron-style scheduler for Twisted
by vitaly＠synapticvision.com 15 Apr '10

15 Apr '10

hi, is there any cron-style scheduler in Twisted? Could one point me to the docs where it could be found? Thanks.

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[Twisted-Python] profiling code that runs in threads
by Pet 14 Apr '10

14 Apr '10

Hello! I've tried to profile my twisted server with --profile=path --profiler=cProfile --savestats options for twistd and it show results only for functions which are in main thread and it is not really helpful, because "dirty work" is done in threads. Is it possible to profile functions which runs in other threads? Thanks! Pet

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[Twisted-Python] Upload large files on twisted server
by Tux Attack 14 Apr '10

14 Apr '10

Hi, I need some help in uploading large files to twisted server. I want to upload large files on twisted server using php.But as php has limit of 24MB, I decided to use ftp functions of php to upload large files.I am running ftp server written in twisted.When i try to upload a file using any ftp client then its working fine but when i use a php script for ftp file upload then it is not working.Initially when i tried to upload file using same php script but without passive mode , it created a file on server but the size of file was 0 bytes.When i added a line to switch to passive mode now it doesn't go beyond a function to switch passive mode and connection to server gets timed out.Here is my php code <?php > $ftp_server='localhost'; > $ftp_user_name='chetan'; > $ftp_user_pass='chetan'; > $file = 'av.jpg'; > $remote_file = 'av.jpg'; > > $conn_id = ftp_connect($ftp_server, 8002); > > $login_result = ftp_login($conn_id, $ftp_user_name, $ftp_user_pass); > > ftp_pasv($conn_id, true); > > if (ftp_put($conn_id, $remote_file, $file, FTP_BINARY)) { > echo "successfully uploaded $file\n"; > } else { > echo "There was a problem while uploading $file\n"; > } > > ftp_close($conn_id); > ?> > > Or is there any other way i can upload large files on twisted server ?

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Re: [Twisted-Python] If a unix socket exists, you can't listen on it. Delete /dev/log
by sara bai 13 Apr '10

13 Apr '10

As you said ,now it works, a new dev/log created each time after i run the code . thank you very much . - Sara >>Subject: Re: twisted.internet.error.CannotListenError: Couldn't listen on > any:/dev/log: [Errno 98] Address already in use > >>If a unix socket exists, you can't listen on it. Delete /dev/log and you should be able to listen on it again. >>Jean-Paul

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[Twisted-Python] Question about processes in python
by Gabriel Rossetti 13 Apr '10

13 Apr '10

Hello everyone, I'd like to run a python function in a new process, like python 2.6's multiprocessing does. I wanted to use ProcessProtocol, but it seems to only work for executing executables and interacting with them using stdin/stdout/other fds. Is there a way of running a python piece of code in a new process? Thank you, Gabriel

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[Twisted-Python] twisted.internet.error.CannotListenError: Couldn't listen on any:/dev/log: [Errno 98] Address already in use
by sara bai 13 Apr '10

13 Apr '10

hi all : I have stoped rsyslog service , and the following program is used to listen on 'dev/log' after rsyslog stoped type this command in shell : $ logger write this mesg to var/log/syslog this msg can't write to var/log/syslog anymore after run # python devlog.py ,but i got an error like this : * " twisted.internet.error.CannotListenError: Couldn't listen on any:/dev/log: [Errno 98] Address already in use " * # ps aux|grep syslog there is no syslog process runing my system is ubuntu9.10 there is no process named syslogd --that's the very process i want make it stop $ ps aux|grep syslog root 4656 0.0 0.0 1852 548 ? Ss 11:24 0:00 dd bs=1 if=/proc/kmsg of=/var/run/rsyslog/kmsg syslog 4658 0.0 0.0 33184 1244 ? Sl 11:24 0:00 rsyslogd -c4 1000 4663 0.0 0.0 3040 800 pts/1 R+ 11:24 0:00 grep --color=auto syslog # service rsyslog stop $ ps aux|grep syslog 1000 4647 0.0 0.0 3040 800 pts/1 S+ 11:24 0:00 grep --color=auto syslog this code is supose to makesure logger still can write log message to /var/log/syslog after syslogd stoped i don't know why *Address already in use* since the rsyslog service is not running anymore I'm I stoped the wrong service ? or listening on the wrong ** *unix socket ?* need help ... # devlog.py from twisted.internet.protocol import DatagramProtocol, Factory from twisted.internet import reactor class LogProtocol(DatagramProtocol): def datagramReceived(self, datagram): sys.stdout.write(datagram) class SysLogFactory(Factory): protocol = LogProtocol logprotocol = LogProtocol() reactor.listenUNIXDatagram('/dev/log', logprotocol) reactor.run()

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[Twisted-Python] Twisted Download Page
by Nenad Lakinski 12 Apr '10

12 Apr '10

Hi, Is the tmrc.mit.edu download location down? Are there any mirrors? Neno

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[Twisted-Python] [ANN] txwsgi 0.1
by Manlio Perillo 11 Apr '10

11 Apr '10

I'm pleased to announce txwsgi, version 0.1. txwsgi is a fork of twisted.web.wsgi, that, unlike the original implementation, executes the WSGI application in the main I/O thread. txwsgi implements the x-wsgiorg.suspend extension (originally proposed during a discussion on the twisted-web mailing list!), that enables support to asynchronous WSGI applications that can use Twisted API. Some examples are available in the doc/examples directory, in the source distribution. The project is available on BitBucket: http://bitbucket.org/mperillo/txwsgi/ More informations are available in the README file. The x-wsgiorg.suspend extension is specified in doc/wsgiorg.suspend.rst. Please note that I implemented txwsgi to serve as a reference implementation. If someone is interested in using it for non testing purpose, please let me know since the code needs to be reviewed, some small issues needs to be fixed and tests must be written. Regards Manlio Perillo

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 10 Apr '10

10 Apr '10

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[Twisted-Python] Seeking advice: Coping with heavy log file loads
by Paul Goins 10 Apr '10

10 Apr '10

There may not be a clear answer to this problem, and the answer may or may not be Twisted-specific. I'm just trying to fish for ideas here. The server I'm working on suffers from extremely high CPU time spent in the logging functions. I'm spending between 30 and 40% of all CPU time just in twisted.python.log.msg. Describing the environment: We use DailyLogFiles for file rotation along with the PythonLoggingObserver to allow for logLevel support. (Of course, this gives us significant overhead from Python's complex logging architecture; maybe we should drop this...) On a 1000 request test of this server, we generate 58,274 calls to t.p.log.msg. There's room for cleanup, but there's lots of pressure to keep many of the log calls we have for forensic purposes, so we can only cut this back so far. Anyway, does anyone have any ideas for speedups? Any stories from experience especially? Shots in the dark are welcome. ;-) - Paul Goins

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