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Without any extra work, you can send objects of various classes such as QString, QImage, QVariant, and so on through queued connections In some scenarios you should use your own types in your connections This is actually very common because most applications involve one or more custom types that are natural to pass along with a signal If you attempt to pass a custom type through a queued connection, you will run into runtime errors that look very similar to the one shown in Listing 12-31 The errors occur when the connection is being made and raised because of the way queuing of signals and their arguments work Listing 12-31 Trying to pass a custom type through a queued connection QObject::connect: Cannot queue arguments of type 'TextAndNumber' (Make sure 'TextAndNumber' is registed using qRegisterMetaType()) QObject::connect: Cannot queue arguments of type 'TextAndNumber' (Make sure 'TextAndNumber' is registed using qRegisterMetaType().

To set up the tests correctly, let s create the following methods: def test_save_prohibit_get(self): """Tests to ensure that GET requests are prohibited""" def test_save_404_invalid_id(self): """Tests that a 404 response is returned if no ID is specified or if the ID doesn't exist""" def test_save_invalid_form_data(self): """Tests that invalid data results in the form being returned with error messages""" def test_save(self): """Tests that valid data is saved to the database, that the response redirects to the view() action and that a flash message is set in the session""".

PHARMING (A.K.A. DNS CACHE POISONING)

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) When a signal is queued, it is queued together with its arguments This means that the arguments are copied and stored in a queue before they are passed on to the slots To be able to queue an argument, Qt needs to construct, destruct, and copy such an object For Qt to know how to do this, all custom types need to be registered using qRegisterMetaType, just as the error message says Let s look at how this is done in real life First you need some background about what it is that you are trying to achieve In the threaded signals and slots demo, you sent text strings from TextThread objects to a TextDevice object The text device counts the number of strings it has received You ll extend this by letting the TextThread objects keep count of how many texts they have sent.

These tests will require some imports, so add the following lines to the top of tests/ functional/test_pagepy: from routes import url_for from simplesitemodel import meta from urlparse import urlparse Now let s implement the test methods starting with test_save_prohibit_get(), which looks like this: class TestPageController(TestController): def test_save_prohibit_get(self): """Tests to ensure that GET requests are prohibited""" response = selfappget( url=url_for(controller='page', action='save', id='1'), params={ 'heading': u'Updated Heading', 'title': u'Updated Title', 'content': u'Updated Content', }, status = 405 ) As you can see, the example uses the get() method of selfapp to simulate a GET request to the save() action with some sample params, which will be sent as part of the query string By default, the get() and post() methods expect either a 200 response or a response in the 300s and will consider anything else an error.

In this case, you expect the request to be denied with a 405 Method Not Allowed response, so to prevent pastefixture from raising an exception, you have to specify the status parameter explicitly Because pastefixture checks that the status will be 405, you don t have to add another check on the response object Now let s look at the test_save_404_invalid_id() method: def test_save_404_invalid_id(self): ""Tests that a 404 response is returned if no ID is specified or if the ID doesn t exist""" response = selfapppost( url=url_for(controller='page', action='save', id=''), params={ 'heading': u'Updated Heading', 'title': u'Updated Title', 'content': u'Updated Content', }, status=404 ) response = selfapppost( url=url_for(controller='page', action='save', id='2'), params={ 'heading': u'Updated Heading', 'title': u'Updated Title', 'content': u'Updated Content', }, status=404 ) As you can see, this code is similar but uses the post() method and performs two tests rather than one.

While the term pharming was coined in March 2005 shortly after a significant attack, this type of attack has been known for years prior under the name DNS cache poisoning. However, due to the increasing use of the Internet to conduct financial transactions, DNS cache poisoning is no longer just a matter of academic interest criminals have turned to it for financial gain.

They will then send TextAndNumber objects that contain both text and its count to the text device..

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