57a5f126b5
git-svn-id: svn://svn.cy55.de/Zope3/src/loops/trunk@1955 fd906abe-77d9-0310-91a1-e0d9ade77398
135 lines
4.2 KiB
Python
135 lines
4.2 KiB
Python
#
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# Copyright (c) 2007 Helmut Merz helmutm@cy55.de
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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"""
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Transporter base classes.
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$Id$
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"""
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from base64 import b64encode
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from twisted.internet import reactor
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from twisted.internet.defer import Deferred, fail
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from twisted.web.client import getPage
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from zope.interface import implements
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from loops.agent.interfaces import ITransporter, ITransportJob
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from loops.agent.schedule import Job
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class TransportJob(Job):
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implements(ITransportJob)
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def __init__(self, transporter):
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super(TransportJob, self).__init__()
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self.transporter = transporter
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self.resources = []
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self.deferred = None
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def execute(self):
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result = self.params.get('result')
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if result is None:
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return fail('No data available.')
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self.resources = result
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self.deferred = Deferred()
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d = self.transporter.transfer(self.resources.pop())
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d.addCallback(self.transferDone).addErrback(self.logError)
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return self.deferred
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def transferDone(self, result):
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self.logTransfer(result)
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if self.resources:
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d = self.transporter.transfer(self.resources.pop())
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d.addCallback(self.transferDone).addErrback(self.logError)
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else:
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self.deferred.callback('OK')
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def logTransfer(self, result, err=None):
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#print 'transfer successful; remaining:', len(self.resources)
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# TODO: logging
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# self.transporter.agent.logger.log(...)
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pass
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def logError(self, error):
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print '*** error on transfer', self.transporter.serverURL, error
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self.deferred.errback(error)
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class Transporter(object):
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implements(ITransporter)
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jobFactory = TransportJob
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serverURL = 'http://localhost:8080'
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method = 'PUT'
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machineName = 'unknown'
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userName = 'nobody'
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password = 'secret'
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def __init__(self, agent, **params):
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self.agent = agent
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for k, v in params.items():
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setattr(self, k ,v)
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self.deferred = None
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def createJob(self):
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return self.jobFactory(self)
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def transfer(self, resource):
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data = resource.data
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if type(data) is file:
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text = data.read()
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data.close()
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else:
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text = data
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path = resource.path
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app = resource.application
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metadata = resource.metadata
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auth = b64encode(self.userName + ':' + self.password)
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headers = {'Authorization': 'Basic ' + auth}
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url = self.makePath('.data', app, path)
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d = getPage(url, method=self.method, headers=headers, postdata=text)
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if metadata is None:
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d.addCallback(self.finished)
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else:
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d.addCallback(self.transferMeta, app, path, headers, metadata.asXML())
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self.deferred = Deferred()
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return self.deferred
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def transferMeta(self, result, app, path, headers, text):
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url = self.makePath('.meta', app, path)
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d = getPage(url, method=self.method, headers=headers, postdata=text)
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d.addCallback(self.finished)
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def finished(self, result):
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self.deferred.callback(result)
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def makePath(self, infoType, app, path, extension=None):
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if path.startswith('/'):
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path = path[1:]
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url = self.serverURL
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if url.endswith('/'):
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url = url[:-1]
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fullPath = '/'.join((url, infoType,
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self.machineName, self.userName, app, path))
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if extension:
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fullPath += '.' + extension
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return fullPath
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