Mailman 3 January 2012 - Twisted

[Twisted-Python] txjsonrpc.web2 ?
by bino oetomo 13 Jan '12

13 Jan '12

Dear All ... I try to use txjsonrpc web2. I download the source from http://pypi.python.org/packages/source/t/txJSON-RPC/txJSON-RPC-0.3.1.tar.gz after extracting and installing .. I go to the examples/web2 directory ... and run : bino@bino-desktop:~/Documents/IWIC/JSONRPC/txJSON-RPC-0.3.1/examples/web2$ twistd -ny ./server.tac -l ./server.log --pidfile server.pid --------------------------------------- and I got exception : --- <exception caught here> --- File "/usr/lib/python2.6/dist-packages/twisted/application/app.py", line 450, in getApplication application = service.loadApplication(filename, style, passphrase) File "/usr/lib/python2.6/dist-packages/twisted/application/service.py", line 390, in loadApplication application = sob.loadValueFromFile(filename, 'application', passphrase) File "/usr/lib/python2.6/dist-packages/twisted/persisted/sob.py", line 210, in loadValueFromFile exec fileObj in d, d File "./server.tac", line 1, in <module> from twisted.web2 import server exceptions.ImportError: No module named web2 ------------------- I try to install newst twisted from svn ... but got same exception. Question : Where can i got twisted.web2 ? Sincerely -bino-

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[Twisted-Python] Question : How to web test txjsonrpc ?
by bino oetomo 12 Jan '12

12 Jan '12

Dear All ... I have a basic txjsonrpc script, like : --------------- from twisted.application import internet, service from txjsonrpc.web import jsonrpc from twisted.web import server from twisted.internet import reactor import traceback class MyRPC(jsonrpc.JSONRPC): def __init__(self): self.allowNone = True self.useDateTime = False #variabel untuk menampung koneksi xmppclient #perlu disiapkan terlebih dahulu def jsonrpc_aksi(self, msg): print 'JSON MSG', print msg print '------' print msg['myvar'] print '\n' return 'OK' #Create Application application = service.Application("Serial MultiService Example") #build jsonrpc site myrpc = MyRPC() site = server.Site(myrpc) myrpcservice = internet.TCPServer(50008, site, interface='localhost') #Creating Multi Service multiService = service.MultiService() #Add our Services to multiservice myrpcservice.setServiceParent(multiService) #Set created application to be serviceparent of multiservice multiService.setServiceParent(application) --------------- Those script is work fine ...I mean can be accessed via python based jsonrpc client. But now i need to call this rpc server via web interface. Since I don't have enough knowledge on web-based JSONRPC client , i do search google for it ... but I can't understand. So I ask my friend to write some simple JSONRPC client , and he send me this litle html --------------- <!DOCTYPE html> <html> <head> <script type="text/javascript"src="http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js <view-source:http://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js>"></script> <script type="text/javascript"> $(document).ready(function(){ $('#getData').live('click', function(){ $jsonArray ='{"action" : "aksi","myval1" : "val1", "myval2" :{"myval2a":"val2a","myval2b":"val2b"}}'; $arr = JSON.stringify($jsonArray); $.get("http://127.0.0.1:50008/JSONRPC",{data:$arr},function(response){ $("#showdata").html(response); }); }); }); </script> </head> <body> <button id="getData">Get JSON Data</button> <div id="showdata"></div> </body> </html> --------------- My log file say : File "/usr/lib/pymodules/python2.6/simplejson/decoder.py", line 420, in raw_decode raise JSONDecodeError("No JSON object could be decoded", s, idx) simplejson.decoder.JSONDecodeError: No JSON object could be decoded: line 1 column 0 (char 0) And I think the received web request is reported as : ---------------- 2012-01-13 10:56:29+0700 [HTTPChannel,3,127.0.0.1] 127.0.0.1 - - [13/Jan/2012:03:56:29 +0000] "GET /JSONRPC?data=%22%7B%5C%22action%5C%22+%3A+%5C%22aksi%5C%22%2C%5C%22myval1%5C%22+%3A+%5C%22val1%5C%22%2C+%5C%22myval2%5C%22+%3A%7B%5C%22myval2a%5C%22%3A%5C%22val2a%5C%22%2C%5C%22myval2b%5C%22%3A%5C%22val2b%5C%22%7D%7D%22 HTTP/1.1" 500 14369 "http://127.0.0.1/taxi-get.html" "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.2.18) Gecko/20110628 Ubuntu/10.10 (maverick) Firefox/3.6.18" ---------------- So , kindly please give me (or refer me to) any simple sample of web-based JSONRPC client .. using GET and/or POS methode ? Sincerely -bino-

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[Twisted-Python] telnet works, why wont this client/protocol test?
by Mike Winter 12 Jan '12

12 Jan '12

i can telnet to the port given in test-code below and it interacts appropriately. The connection is to a regular portforwarder and the server is an Answer-server: class Answer(LineReceiver): answers = {'How are you?': 'Fine', 'no': 'No!?!', None : "I don't know what you mean", 'hello': 'hi there', 'Whats Up': 'not much' } def lineReceived(self, line): log.debug('line: %s' % line) if self.answers.has_key(line): self.sendLine(self.answers[line]) else: self.sendLine(self.answers[None]) Its not a unit-test, but it reasonably expresses code that I dont understand from twisted.trial.unittest import TestCase from twisted.internet import reactor, protocol, defer from twisted.internet.protocol import ClientFactory,ReconnectingClientFactory from twisted.protocols.policies import WrappingFactory from twisted.protocols import basic import localproxy import settings from state import State import engine from server import Factory, AssertingAnswer, AssertingFactoryMixin from assertion import URL import logging global log log = logging.getLogger(__name__) log.setLevel(settings.loglevel) class Test(TestCase): def sendTraffic(self, vip, count = 1, payload = 'Whats Up\n', expectedResponse = 'not much'): '''telnet to DUT and post payload''' log.debug('vip: %s:%s' % (vip.host, vip.port)) t = self class Hello(basic.LineReceiver): def dataReceived(self, data): log.debug('trace: %s' % data) return basic.LineReceiver.dataReceived(self,data) def lineReceived(self, line): log.debug('trace: %s' % line) t.assertEquals(line, expectedResponse) self.transport.loseConnection() def connectionMade(self): log.debug('trace, writing "%s"' % payload) assert self.transport self.transport.write(payload) def connectionLost(self, reason): log.debug('reason: %s' % reason) f = ReconnectingClientFactory() f.protocol = Hello factory = WrappingFactory(f) reactor.connectTCP( vip.host, vip.port, factory) log.debug('clientFactory: %s' % factory.__dict__) return factory def killClient(t): log.debug('t: %s' % t) def testClientConnect(self): vip = State(host='127.0.0.1', port = 10040) t = self.sendTraffic( vip) reactor.callLater(1, self.killClient, t)

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[Twisted-Python] question about twisted+wxPython : How to migrate to twistd ?
by bino oetomo 11 Jan '12

11 Jan '12

Dear All ... I just copy and paste the code from http://code.activestate.com/recipes/298985/ and adding lines : -------------- self.allowNone = True self.useDateTime = False -------------- just before line# 45, and it work great. I need to adopting that script to my application, but I'm not familiar with code line 64-78 : -------------------- if __name__ == '__main__': # Initiliaze MyApp app = MyXMLRPCApp(False) # False -> printing stdout/stderr to shell, # not in an additional wx window # Make wx application twisted aware # Must have to start "wxreactor.install()" on top before reactor.registerWxApp(app) # Make a XML-RPC Server listening to port 7080 reactor.listenTCP(7080, server.Site(app)) ------------------- How to migrate that script to twistd, something like : ------------------ #Create Application application = service.Application("MultiService Example") #Create xmlrpc site myrpc = MyRPC() site = server.Site(myrpc) myrpcservice = internet.TCPServer(50008, site, interface='localhost') #Creating Multi Service multiService = service.MultiService() #Add our Services to multiservice myrpcservice.setServiceParent(multiService) #Set created application to be serviceparent of multiservice multiService.setServiceParent(application) ------------------ Kindly please give me your enlightment. Sincerely -bino-

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[Twisted-Python] I see, remote_method can also return a deferred. Perhaps we could document that?
by David Kao 10 Jan '12

10 Jan '12

I almost gave up choosing twisted until I found this explanation http://twistedmatrix.com/pipermail/twisted-python/2004-April/007517.html which basically says a remote_method can return a deferred. In this case, the PB server won't return the result of the Deferred back to the client until the server-side callback fires. The result of the remote_method is then returned to the client, which then triggers client side's deferred callback. So, I thought one of the following would be helpful: 1) An example showing remote_method returning a deferred and/or 2) A section named "Server side remote_* methods can be async by returning deferreds" could be added as a 7th item in http://twistedmatrix.com/documents/current/core/howto/pb-usage.html . I spent some quality 30+ hours carefully reading 90% of the http://twistedmatrix.com/documents/current/core/howto/index.html and I do not remember picking this subtlety up. (Or you can point me the right place in doc.) (great doc btw.) Should I submit an improvement ticket for this? I could also make the server side example using Echoer, remote_echo, and deferToThread just so that whoever fixes the ticket can just copy and paste. David Kao

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[Twisted-Python] test
by bino oetomo 09 Jan '12

09 Jan '12

I don't receive any new post for several days. Is there a problem with this list ? -bino-

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[Twisted-Python] Weekly Bug Summary
by exarkun＠twistedmatrix.com 07 Jan '12

07 Jan '12

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[Twisted-Python] module name overloading and import rules
by Mike Winter 06 Jan '12

06 Jan '12

linkhttp://stackoverflow.com/questions/8761874/module-name-overloading-and-…

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[Twisted-Python] Protocol stack in twisted
by nivedita datta 06 Jan '12

06 Jan '12

A simple query,.. Is it possible to implement protocols & protocol stack using twisted?? Regards, Nivedita Datta

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[Twisted-Python] ConnectionMixin.loseConnection (in _newtls) lacking arguments
by Saúl Ibarra Corretgé 04 Jan '12

04 Jan '12

Hi all, I'm experiencing a TypeError exception in my code since I updated to Twisted 11.1. After hunting it it seems to be caused because the loseConnection function from (_newtls) lacks arguments. If there is no OpenSSL support present in the system the loseConnection function will be called in abstract.FileDescriptor (please, correct me if I'm wrong), and the signature for loseConnection is the following: def loseConnection(self, _connDone=failure.Failure(main.CONNECTION_DONE)): Shouldn't it be the same for _newtls.ConnectionMixin ? Or perhaps it should accept *args and **kw and pass them on? Or am I wrong here? Thanks and regards, -- /Saúl http://saghul.net | http://sipdoc.net

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