Getting Started with HTML5 WebSocket Programming by Vangos Pterneas

By Vangos Pterneas

Getting begun with HTML5 WebSocket Programming can provide the genuine strength of bi-directional verbal exchange, applied by utilizing the new HTML5 WebSocket API. You’ll how one can configure the server and consumers, the right way to transmit types of facts and the way to safe the total system.
This publication will introduce you to the WebSocket global. we commence by means of introducing the WebSocket API, and proceed with functional, real-world examples until eventually we will be able to ascertain the best way to construct multi-functional net apps for any form of equipment.

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Additional resources for Getting Started with HTML5 WebSocket Programming

Example text

Remove(socket); }; Message The OnMessage event is raised when a client sends data to the server. Inside this event handler, we can transmit the incoming message to all of the clients, or probably select only some of them. The process is straightforward. OnMessage = () => { // Display the message on the console. WriteLine(message); }; [ 33 ] Configuring the Server Send The Send() method simply transmits the desired message to the specified client. Using Send(), we can deliver text or binary data across the clients.

In terms of WebSockets, it makes sense to stream video across different clients using a fast and efficient way. Live video streaming is currently supposed to be one of the last reasons Flash is still alive. Let's see how you can stream live video data from the server to the clients in the WebSocket way. A video is nothing more than a collection of consecutive images. Each of these images is called a frame. When a number of frames (usually more than 20) are displayed per second, the human eye cannot distinguish the distinct images and thinks of it like a continuous flow.

AppendChild(image); } } The preceding code snippet generates an image by properly interpreting the incoming raw data. You have used some brand-new HTML5 JavaScript methods to easily handle the blob. Let's be more specific. At first, you verify that the server message is an instance of blob, similar to the way you checked for the buffered array. Then, you store the raw data to a local variable, named blob. In order to display the blob in an image format, you need to decode it properly. The new JavaScript API makes basic image manipulation a piece of cake.

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