How to write a websocket server side

Before we dive into learning about the WebSocket protocol and API I first want to spend a little time going through some of problems that face real-time web applications and how the WebSocket spec aims to solve them.

How to write a websocket server side

how to write a websocket server side

Nuget available library by sta - https: Just accept the warning and add the automatic firewall rule. Whenever a new app listens on a port which this app doesyou will get this message and it is there to point out nefarious applications potentially sending and receiving unwanted data over your network.

All the code is there for you to see so you can trust what's going on in this project. Note that this is a multithreaded server so you may want to freeze threads if this gets confusing.

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The console output prints the thread id to make things easier. If you want to skip past all the plumbing, then another good place to start is the Respond function in the WebSocketConnection class.

Implementation of a chat web socket connection is as follows: There is an example of one in the command line app. Starting the server and the test client from the command line app: Start logger ; Console.

Error null, ex ; Console. Opening and closing handshakes are tested here. The connection starts off with the client connecting to a remote server and sending HTTP header text to that server. The header text asks the web server to upgrade the connection to a web socket connection.

This is done as a handshake where the web server responds with an appropriate HTTP text header and from then onwards, the client and server will talk the Web Socket language.

how to write a websocket server side

This computes the accept string: GetBytes handshakeHttpRequest ; networkStream. Write httpRequest, 0, httpRequest. Length ; Reading and Writing After the handshake as been performed, the server goes into a read loop.

The following two classes convert a stream of bytes to a web socket frame and visa versa: Write maskKey, 0, maskKey.This article needs additional citations for verification.

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A WebSocket server can be written in any server-side programming language that is capable of Berkeley sockets, such as C(++) or Python or even PHP and server-side JavaScript. This is not a tutorial in any specific language, but serves as a guide to facilitate writing your own server.

A Simple Example

If you would like to use the WebSocket API, it is useful if you have a server. In this article I will show you how to write one in C#. You can do it in any server-side language, but to keep things simple and more understandable, I chose Microsoft's language.

This server conforms to RFC so it. This document describes new features and enhancements that are being introduced in It also describes improvements being made for web development.

For most of the developers who are working in the low level in web services area, there is this problem with exposing HTTP + WebSocket services using a single server. The example snippets in this article are taken from our WebSocket chat client/server sample.

See the code, then try out the example for yourself. The example currently has a bug in it; it is trying to use insecure WebSockets but needs to be updated to use a secure one.

WebSockets, caution required!