Mailman 3 August 2008 - Twisted

[Twisted-Python] Twisted and D-BUS
by Pedro Sanchez Aug. 19, 2008

Aug. 19, 2008

Hello, I'd like to get your opinion on using the D-Bus within a twisted application. Would the Python D-Bus binding at http://dbus.freedesktop.org/doc/dbus-python/doc/tutorial.html work with twisted? is there a recommended approach? Thank you, -- Pedro

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[Twisted-Python] Twisted tarball unreachable?
by Phil Mayers Aug. 19, 2008

Aug. 19, 2008

Following the link on the home page I get: [nsg@buildsrv tarballs]$ wget http://tmrc.mit.edu/mirror/twisted/Twisted/8.1/Twisted-8.1.0.tar.bz2#md5=a5… --11:08:27-- http://tmrc.mit.edu/mirror/twisted/Twisted/8.1/Twisted-8.1.0.tar.bz2 Resolving tmrc.mit.edu... 18.150.1.81 Connecting to tmrc.mit.edu|18.150.1.81|:80... failed: Connection refused. Anyone know where I can get the tarball from? Some googling didn't help...

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[Twisted-Python] wxPython integration & msg sending from the GUI
by Gabriel Rossetti Aug. 19, 2008

Aug. 19, 2008

Hello everyone, when using wxPython integration, if my GUI wants to send msgs, do I need to schedule the msg sending through the reactor like is needed when using non-reactor threads (see my post who's subject is "does setTcpNoDelay() not work?"), like : reactor.callFromThread(srv.sendMessage, "my msg") or can I directly call it like : srv.sendMessage(my msg") ? I followed the wx integration tutorial on the Twisted homepage. I guess my question is more like : "Does the wxPython integration make it run in the reactor thread or not". Thank you, Gabriel

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[Twisted-Python] (no subject)
by Mattias Brändström Aug. 18, 2008

Aug. 18, 2008

Hello! Is there any way I can make twisted stop accepting connections for a short period of time and then start accepting connections? Something like reactor.pause()? More precisely, what I want to do is to reread my server configuration on SIGHUP (or some other external event). If possible I would like to do this without locking a mutex when accessing (reading or modifying) the configuration info. I figure that reconfiguring the server will be a rare event. So if there is some way that I can: 1. Block incoming requests. Preferable keeping them in the connection queue. 2. Wait for all running requests to complete. 3. Reread the server configuration. 4. Unblock incoming requests. What do you think? Is there some simple twisted-way to do this? If this has been covered in the past, please point me in that direction. :-) Regards, Mattias

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[Twisted-Python] Is there any similar programming framework like twsited in C/C++ world.
by Peter Cai Aug. 18, 2008

Aug. 18, 2008

Hi all, In my opinion, I like twisted very much but my coworkers are all quite unfamiliar with Python. And also we are afraid of source code leak problem. So, can you remember some similar framework in C/C++ world?

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[Twisted-Python] Disable twisted web logging
by Pavel Aug. 18, 2008

Aug. 18, 2008

My Twisted server is listening on two ports: 80 for processing http requrests and xxx for processing tcp requests from clients. http logs seem to clutter my log file. Is there any way to disable http logs only and leave logging facility otherwise intact? Or at least redirect http logs to a different file? Thanks in advance. -- Good luck, Pavel Bastov

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com Aug. 17, 2008

Aug. 17, 2008

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[Twisted-Python] Execute interactive commands with a custom ssh shell
by The Noob Aug. 16, 2008

Aug. 16, 2008

Hello all, I try to implement a custom ssh server with twisted . I use* sshserver.py to begin (* http://www.devshed.com/c/a/Python/SSH-with-Twisted/ ) I would like to execute interactive scripts which are on my server. The problem is theses scripts are interactives. How can I redirect IO on my shell ? For example, if I want to install a software with apt. I have questions to install dependencies ( yes/no) I start to create a definition for this function like def do_apt. And then when in my custom shell I execute ( apt python)., that executes apt-get install python on the server. But how can I redirect the output in my shell to answer dependencies questions ? Thanks for your help Best Regards The Noob06

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[Twisted-Python] Bluetooth reactor interface
by Nadav Aharony Aug. 15, 2008

Aug. 15, 2008

(forwarding for Daniel who had some list posting trouble) Hi all- I'd like to use Twisted to manage bluetooth communication. I haven't found any existing method for doing this, so I'd like to write and implement a new reactor interface (on par with TCP/UDP) that wraps the lightblue library. What's the right way to go about extending Twisted in this way? Thanks, Daniel

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[Twisted-Python] HTTP CONNECT support
by Felix Ingram Aug. 14, 2008

Aug. 14, 2008

Hello all, I posted the following to the web mailing list but on second thoughts I think that it's kinda a problem with my understanding of the other parts of the framework, so I'm reposting it here. I'd appreciate any pointers. It's a bit lengthy, so apologies for that. I'm looking into adding HTTPS support to the proxy module for some testing I'm doing. I'd like to be able to trap requests and responses as they go to and from the server, so proper CONNECT support is not really what I'm aiming for. I've come up with the following: """ from twisted.web import proxy, http from twisted.internet import reactor, ssl from twisted.python import log import sys import urlparse from OpenSSL import SSL as OSSL class MyProxyClient(proxy.ProxyClient): def handleEndHeaders(self): print "THOSE HEADERS DONE ENDED" self.father.transport.write("\r\n") def handleResponsePart(self, buffer): print "GOT SOME STUFF TO SEND TO THE BROWSER" self.father.transport.write(buffer) def dataReceived(self, data): print "To the Browser" print data # Data sent to the browser proxy.ProxyClient.dataReceived(self, data) def handleResponseEnd(self): print "losing connection..." self.transport.loseConnection() self.father.channel.transport.loseConnection() class MyProxyClientFactory(proxy.ProxyClientFactory): def buildProtocol(self, addr): client = proxy.ProxyClientFactory.buildProtocol(self, addr) client.__class__ = MyProxyClient return client class MySSLContext(ssl.ContextFactory): def getContext(self): ctx = OSSL.Context(OSSL.SSLv23_METHOD) ctx.use_certificate_file('server.cert') ctx.use_privatekey_file('server.pkey') return ctx class MyProxyRequest(proxy.ProxyRequest): protocols = { 'http': MyProxyClientFactory, 'https': MyProxyClientFactory } ports = { 'http': 80, 'https': 443 } def requestDone(self, request): """Called by first request in queue when it is done.""" print "REQUESTDONE DONE BE CALLED" if request != self.requests[0]: raise TypeError del self.requests[0] if self.persistent: # notify next request it can start writing if self.requests: self.requests[0].noLongerQueued() else: if self._savedTimeOut: self.setTimeout(self._savedTimeOut) else: print "lOSING CONNECTION" self.transport.loseConnection() def process(self): parsed = urlparse.urlparse(self.uri) protocol = parsed.scheme host = parsed.hostname doSSL = False if self.method.upper() == "CONNECT": self.transport.write("HTTP/1.1 200 Connection established\r\n\r\n") self.transport.startTLS(MySSLContext()) protocol = "https" self.host = parsed.scheme print "finished connect request" else: if self.isSecure(): headers = self.getAllHeaders().copy() host = headers["host"] protocol = "https" doSSL = True port = self.ports[protocol] if ':' in host: host, port = host.split(':') port = int(port) rest = urlparse.urlunparse(('', '') + parsed[2:]) if not rest: rest = rest + '/' class_ = self.protocols[protocol] headers = self.getAllHeaders().copy() if 'host' not in headers: headers['host'] = host self.content.seek(0, 0) s = self.content.read() clientFactory = class_(self.method, rest, self.clientproto, headers, s, self) if not doSSL: self.reactor.connectTCP(host, port, clientFactory) else: print "Connecting to SSL" self.reactor.connectSSL(host, port, clientFactory, ssl.ClientContextFactory()) class MyProxy(proxy.Proxy): def dataReceived(self, data): print "To the Server" print data # Data sent to the server proxy.Proxy.dataReceived(self, data) def requestFactory(self, *args): return MyProxyRequest(*args) class ProxyFactory(http.HTTPFactory): protocol = MyProxy reactor.listenTCP(8081, ProxyFactory()) log.startLogging(sys.stdout) # Log to the console reactor.run() """ Most of the magic is happening in the 'process' method. I've copied some of the other methods in for debugging. At the moment it's a bit hackish but it's almost working as expected. When a connect request is received then the SSL connection is set up as required (using transport.startTLS). This generates certificate mismatch errors in the browser, but this is expected and is what I'm looking for as then I can read the requests as they come through. The GET request is then received from the browser and forwarded on to the server. The server appears to be happy with this as it does pass the appropriate response back to the proxy. For some reason, however, the browser does not then get passed the response. Comparing identical requests for the HTTP and HTTPS versions of a site show that the only apparent difference is that the headers and body are sent in one go under HTTP and as two separate chunks under HTTPS. E.g. HTTPS: """ 2008-08-07 15:34:15+0100 [MyProxyClient,client] To the Browser 2008-08-07 15:34:15+0100 [MyProxyClient,client] HTTP/1.1 200 OK 2008-08-07 15:34:15+0100 [MyProxyClient,client] Date: Thu, 07 Aug 2008 14:34:15 GMT 2008-08-07 15:34:15+0100 [MyProxyClient,client] Server: Apache/2.2.9 (Win32) DAV/2 mod_ssl/2.2.9 Ope nSSL/0.9.8h mod_autoindex_color PHP/5.2.6 2008-08-07 15:34:15+0100 [MyProxyClient,client] X-Powered-By: PHP/5.2.6 2008-08-07 15:34:15+0100 [MyProxyClient,client] Content-Length: 1325 2008-08-07 15:34:15+0100 [MyProxyClient,client] Connection: close 2008-08-07 15:34:15+0100 [MyProxyClient,client] Content-Type: text/html 2008-08-07 15:34:15+0100 [MyProxyClient,client] 2008-08-07 15:34:15+0100 [MyProxyClient,client] 2008-08-07 15:34:15+0100 [MyProxyClient,client] THOSE HEADERS DONE ENDED 2008-08-07 15:34:15+0100 [MyProxyClient,client] To the Browser 2008-08-07 15:34:15+0100 [MyProxyClient,client] <html> 2008-08-07 15:34:15+0100 [MyProxyClient,client] <head><title>XAMPP</title> 2008-08-07 15:34:15+0100 [MyProxyClient,client] <link href="xampp.css" rel="stylesheet" type="text/c ... """ HTTP: """ 2008-08-07 15:34:01+0100 [MyProxyClient,client] To the Browser 2008-08-07 15:34:01+0100 [MyProxyClient,client] HTTP/1.1 200 OK 2008-08-07 15:34:01+0100 [MyProxyClient,client] Date: Thu, 07 Aug 2008 14:34:01 GMT 2008-08-07 15:34:01+0100 [MyProxyClient,client] Server: Apache/2.2.9 (Win32) DAV/2 mod_ssl/2.2.9 Ope nSSL/0.9.8h mod_autoindex_color PHP/5.2.6 2008-08-07 15:34:01+0100 [MyProxyClient,client] X-Powered-By: PHP/5.2.6 2008-08-07 15:34:01+0100 [MyProxyClient,client] Content-Length: 1325 2008-08-07 15:34:01+0100 [MyProxyClient,client] Connection: close 2008-08-07 15:34:01+0100 [MyProxyClient,client] Content-Type: text/html 2008-08-07 15:34:01+0100 [MyProxyClient,client] 2008-08-07 15:34:01+0100 [MyProxyClient,client] <html> 2008-08-07 15:34:01+0100 [MyProxyClient,client] <head><title>XAMPP</title> 2008-08-07 15:34:01+0100 [MyProxyClient,client] <link href="xampp.css" rel="stylesheet" type="text/c """ The HTTPS version seems to have an extra line feed being added after the headers, which may be causing the problem. I've tried stripping this out but then I get some other exception being thrown and HTTP traffic stops working. I've got a feeling that I'm not quite going about this in the correct way but I'd appreciate any help or insights that anyone could offer. If you need any more details then please ask. Many thanks in advance, Felix

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