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This article introduces the relevant knowledge of "how to achieve network request client / server by Qt". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

First, the realization principle

The http request is tcp communication, so the first step is to instantiate the QTcpServer class listening port and bind the newConnection slot.

Once there is a new connection, it is handed over to the special unpacking class to unpack the corresponding data, and the http request has specific header data, such as whether or not parameters such as whether to keep alive, take it out and parse the application.

The interaction between sending and receiving data is actually the interaction between QTcpSocket communication objects, but the sending and receiving data has the corresponding header data.

To reply to the web page data, you only need to send the html data of the web page to the request object.

II. Functional features

Supports simultaneous processing of multiple client connections, 100 without pressure.

You can set whether the http request is a persistent connection or a short connection. The default is persistent connection.

Support a variety of reply data formats, including web content, json data, etc.

The server example also includes reading file reply and reading database reply.

Support 8 color schemes (dark black, gray black, dark green, light yellow, dark blue, dark black, dark blue, default).

The client can specify the request address, and the server can specify the network card and port to listen.

All requests and connections are counted, and the IP and ports of all online requests are shown in the table.

Can provide a simple web page configuration service, including interaction, as a device's web configuration.

Free to expand to add permissions to check, etc., as a http request server.

Pure Qt implementation, clean code framework, complete comments, support for any Qt version, any compiler, any operating system.

Third, effect picture

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