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In the first, no ID is specified, and in the second the ID specified doesn t exist In both cases, you expect a 404 HTTP response, so the status parameter is set to 404..

The TextAndNumber class, which is the custom type that will be passed through queued connections, will hold a QString and an integer Listing 12-32 shows the class declaration for it The class itself consists of two constructors: one takes no parameters; the other takes text and integer The constructor that doesn t take any parameters is needed by the meta-type registration, while the other is provided for convenience you will use it later on when emitting The text and number are made public, so you do not need to worry about setter and getter methods for them To use the class as a meta-type, you must also provide a public destructor and a public copy constructor Because this class contains no data that can t be handled by the default versions, you do not implement them explicitly.

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A surprisingly large percentage of attacks take place with the cooperation of insiders. Insiders could be, for instance, employees at a corporation who abuse their privileges to carry out malicious deeds. Employees are sometimes trusted with access to databases with customer information and employee records, copies of financial reports, or confidential information concerning product launches. Such information can be abused in the obvious ways: employee data could be sold to headhunters, customer credit card numbers could be sold on the black market, financial reports could facilitate insider trading, and product launches could be leaked to the press. As such, it is sometimes important to defend a system against the very people that are responsible for using it on a daily basis. Database administrators, for example, have traditionally been given the keys to the entire kingdom, and have complete access to all employee and customer data stored in a database. System administrators similarly are given superuser access to all resources and data under the control of an operating system. Additional features are needed in both database and operating systems to provide for separation of privilege, the concept that an individual should only be given the privileges that he needs, without also being given unrestricted access to all data and resources in the system.

Routes has a surprising legacy feature that means that if you don t specify a controller and an action for a particular route, the implicit defaults of controller='content' and action='index' will be used for you. This can be demonstrated very simply: >>> map = Mapper(controller_scan=controller_scan) >>> map.minimization = False >>> map.connect('/archives/') >>> print map.match('/archives/') {'action': u'index', 'controller': u'content'} It is highly unlikely you want Routes to make up action and controller variables for you, so it s strongly recommended that you disable this feature. You can do this by passing _explicit=True as an argument to the individual routes you want implicit defaults to be disabled for: >>> map = Mapper(controller_scan=controller_scan) >>> map.minimization = False >>> map.connect('/archives/', _explicit=True) >>> print map.match('/archives/') None In reality, it is likely you will want these implicit defaults disabled for all your routes. Luckily, the explicit=True option you passed to the Mapper() object to disable route memory also disables implicit defaults, which is another reason to use it.

The highlighted line at the very end of the listing contains a reference to the Q_DECLARE_ METATYPE macro By passing the type to this macro, the type can be used in combination with QVariant objects, which is necessary to be able to register it using qRegisterMetaType Listing 12-32 The TextAndNumber class declaration class TextAndNumber { public: TextAndNumber(); TextAndNumber( int, QString ); int number; QString text; }; Q_DECLARE_METATYPE( TextAndNumber ); The actual call to qRegisterMetaType is made from the main function that can be seen in the first highlighted line in Listing 12-33 The other two changed lines are the connect calls They have changed since you passed QString objects because the both the signals and slots now have a new argument type Listing 12-33.

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