473,587 Members | 2,637 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Passing Python socket objects to child processes in Windows

I'm trying to write a Python app which accepts a socket connection and
then spawns another Python process to handle it. I need it to run
under both Linux and Windows. I have it working under Linux, but am
having problems with the Windows implementation.

My app uses the subprocess.Pope n class to spawn the child process. The
first problem I ran into was that Windows Python won't let you pass a
socket object via the Popen stdin argument (it results in a "bad file
descriptor" error). File object work okay, but sockets seem to be
handled differently.

After some searching, I found something of a work-around in this post:
http://mail.python.org/pipermail/pyt...er/287742.html.

This workaround uses pywin32 to duplicate the original socket handle
via the Win32 API. It almost works, in the sense that I now have a
file stream in my child process which corresponds to the original
socket object in the parent. But I can't find a way to convert the
resulting Windows file handle into a Python socket object (there does
not appear to be a Windows-equivalent of the socket.fromfd() function).
My app needs the socket object in order to control TCP stuff.

So I'm a bit stuck. Is there a better way (or any way?) to pass a
socket to a child process in Windows, and to actually end up with a
Python socket object in the child process?

Thanks in advance for any help.

--
Dan Jakubiec

Jan 23 '07 #1
0 1831

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

4
3469
by: Pif Paf | last post by:
I am writing programs that will run as TCP servers. Briefly, I want to set up a TCP server on a port in such a way that if another server is already sitting on that port (both servers are Python programs I will be writing), the old one is booted off (and its process ended). My master process is a test harness, which tests a script which as part of its functionality sends http GET messages. My test harness sets up an http server as a...
11
6828
by: Mike M | last post by:
Is it possible? In the parent process, I have a socket that binds, listens and then accepts new connections (which creates new sockets in the process). I want to be able to pass some of these new sockets to a spawned process. Is it possible, and if so how? Any help is much appreciated!! Mike
0
1170
by: Iker Arizmendi | last post by:
Hello all. I'm trying to get a server process to do the following on both Linux and Windows: 1) Create a socket and bind it to some port number. 2) Use spawnl to create other processes that will then listen and accept on that socket. On Linux I've managed to do that by using command line
10
2985
by: I. Myself | last post by:
Suppose we spawn a child process with Popen. I'm thinking of an executable file, like a compiled C program. Suppose it is supposed to run for one minute, but it just keeps going and going. Does Python have any way to kill it? This is not hypothetical; I'm doing it now, and it's working pretty well, but I would like to be able to handle this run-on condition. I'm using Windows 2000, but I want my program to be portable to linux. ...
0
334
by: Kurt B. Kaiser | last post by:
Patch / Bug Summary ___________________ Patches : 393 open (+15) / 3315 closed (+17) / 3708 total (+32) Bugs : 908 open (+22) / 5975 closed (+49) / 6883 total (+71) RFE : 223 open ( -1) / 229 closed ( +2) / 452 total ( +1) New / Reopened Patches ______________________
113
5225
by: John Nagle | last post by:
The major complaint I have about Python is that the packages which connect it to other software components all seem to have serious problems. As long as you don't need to talk to anything outside the Python world, you're fine. But once you do, things go downhill. MySQLdb has version and platform compatibility problems. So does M2Crypto. The built-in SSL support is weak. Even basic sockets don't quite work right; the socket module...
167
8239
by: darren | last post by:
Hi I have to write a multi-threaded program. I decided to take an OO approach to it. I had the idea to wrap up all of the thread functions in a mix-in class called Threadable. Then when an object should run in its own thread, it should implement this mix-in class. Does this sound like plausible design decision? I'm surprised that C++ doesn't have such functionality, say in its STL. This absence of a thread/object relationship in...
0
7927
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, weíll explore What is ONU, What Is Router, ONU & Routerís main usage, and What is the difference between ONU and Router. Letís take a closer look ! Part I. Meaning of...
0
7857
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
8220
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
8352
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
0
5396
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
3846
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
2367
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
1
1457
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
0
1194
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.