Gabor Guzmics
18b157972b
- little tests trying to calculate how SC calcs survivability (not resolved yet) - dejaqt born as idea for standalone library.
152 lines
5.8 KiB
Python
152 lines
5.8 KiB
Python
"""
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Qt WebKit Browser for local access to internal Django Views.
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"""
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import os, logging
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from PyQt4 import QtCore, QtGui, QtWebKit, QtNetwork
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from django.test import Client
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class DebugPage(QtWebKit.QWebPage):
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def sayMyName(self):
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return 'DebugPage'
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class DejaWebView(QtWebKit.QWebView):
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'''
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BaseDir. Get rid of it?
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'''
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def __init__(self, *args, **kwargs):
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basedir = kwargs.pop('basedir', None)
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QtWebKit.QWebView.__init__(self, *args, **kwargs)
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oldManager = self.page().networkAccessManager()
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self.setPage(DebugPage())
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self.page().setNetworkAccessManager(DejaNetworkAccessManager(self, basedir))
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def set_basedir(self, basedir):
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self.page().setNetworkAccessManager(DejaNetworkAccessManager(self, basedir))
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class DejaNetworkAccessManager(QtNetwork.QNetworkAccessManager):
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'''
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The Deja Network Access Manager provides access to two new protocols:
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- page:/// tries to resolve a page internally via a django test client.
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- res:/// access to a resource.
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Note, if page does not find the page, a res:/// attempt is made automatically.
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This has to be expanded!
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'''
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USE_NETWORK = False
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def __init__(self, parent=None, basedir=None):
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QtNetwork.QNetworkAccessManager.__init__(self, parent=None)
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if not basedir:
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# take current dir as basedir.
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self.basedir = os.path.dirname(os.path.abspath(__file__))
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else:
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self.basedir = basedir
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def createRequest(self, operation, request, data):
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scheme = request.url().scheme()
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if scheme != 'page' and scheme != 'res':
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if self.USE_NETWORK:
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return QtNetwork.QNetworkAccessManager.createRequest(self, operation, request, data)
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elif scheme == 'page':
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if operation == self.GetOperation:
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# Handle page:// URLs separately by creating custom
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# QNetworkReply objects.
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reply = PageReply(self, request.url(), self.GetOperation)
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#print('here')
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#print reply
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return reply
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elif operation == self.PostOperation:
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#print data.readAll()
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#print request
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reply = PageReply(self, request.url(), self.PostOperation)
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return reply
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elif scheme == 'res':
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if operation == self.GetOperation:
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return ImageReply(self, request.url(), self.GetOperation, self.basedir)
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else:
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if self.USE_NETWORK:
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return QtNetwork.QNetworkAccessManager.createRequest(self, operation, request, data)
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return NoNetworkReply(self, request.url(), self.GetOperation)
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class BasePageReply(QtNetwork.QNetworkReply):
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content_type = 'text/html; charset=utf-8'
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def __init__(self, parent, url, operation):
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QtNetwork.QNetworkReply.__init__(self, parent)
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self.content = self.initialize_content(url, operation)
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self.offset = 0
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self.setHeader(QtNetwork.QNetworkRequest.ContentTypeHeader, self.get_content_type())
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self.setHeader(QtNetwork.QNetworkRequest.ContentLengthHeader, len(self.content))
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QtCore.QTimer.singleShot(0, self, QtCore.SIGNAL('readyRead()'))
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QtCore.QTimer.singleShot(0, self, QtCore.SIGNAL('finished()'))
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self.open(self.ReadOnly | self.Unbuffered)
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self.setUrl(url)
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def get_content_type(self):
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return self.content_type
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def initialize_content(self, url, operation):
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return '''
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<html>
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<head><title>Empty Page</title></head>
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<body>This is an empty page. If you see this, you need to subclass BasePageReply.</body>
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</html>
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'''
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def abort(self):
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pass
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def bytesAvailable(self):
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return len(self.content) - self.offset + QtNetwork.QNetworkReply.bytesAvailable(self)
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def isSequential(self):
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return True
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def readData(self, maxSize):
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if self.offset < len(self.content):
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end = min(self.offset + maxSize, len(self.content))
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data = self.content[self.offset:end]
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self.offset = end
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return data
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class PageReply(BasePageReply):
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def initialize_content(self, url, operation):
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c = Client()
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print "Response for %s, method %s" % (url.path(), operation)
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if operation == LocalNetworkAccessManager.GetOperation:
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response = c.get(unicode(url.path()), )
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elif operation == LocalNetworkAccessManager.PostOperation:
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response = c.post(unicode(url.path()))
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# response code
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print "Response Status: %s" % response.status_code
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# note: on a 404, we might need to trigger file response.
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return response.content
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class NoNetworkReply(BasePageReply):
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def initialize_content(self, url, operation):
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return '''
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<html>
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<head><title>No Network Access.</title></head>
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<body>
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Internal access to the network has been disabled.
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</body>
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</html>
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'''
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class ImageReply(BasePageReply):
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content_type = 'image/png'
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def __init__(self, parent, url, operation, basedir):
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self.basedir = basedir
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BasePageReply.__init__(self, parent, url, operation)
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def initialize_content(self, url, operation):
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path = os.path.join(self.basedir, unicode(url.path()).lstrip('/'))
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if not os.path.exists(path):
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logging.error('Image does not exist: %s' % path)
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return ''
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h = url.host()
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try:
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f = open(path, 'rb')
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return f.read()
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finally:
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f.close()
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