websocket

SpringBoot入门 (十三) WebSocket使用

由 独自空忆成欢 提交于 2020-12-04 20:46:02
本文记录在SpringBoot中使用WebSocket。 一 什么是WebSocket 　　WebSocket是基于TCP协议的一种网络协议，它实现了浏览器与服务器全双工通信，支持客户端和服务端之间相互发送信息。在有WebSocket之前，如果服务端数据发生了改变，客户端想知道的话，只能采用定时轮询的方式去服务端获取，这种方式很大程度上增大了服务器端的压力，有了WebSocket之后，如果服务端数据发生改变，可以立即通知客户端，客户端就不用轮询去换取，降低了服务器的压力。目前主流的浏览器都已经支持WebSocket协议了。 　　WebSocket使用ws和wss作资源标志符，它们两个类似于http和https，wss是使用TSL的ws。主要有4个事件： 　　onopen 　　 创建连接时触发 　　onclose 　　 连接断开时触发 　　onmessage 接收到信息时触发 　　onerror 　　 通讯异常时触发 二 简单使用示例 　　SpringBoot对WebSocket也做了支持，需要使用的话引入依赖所需要的包spring-boot-starter-websocket就可以了。我们利用它可以双向通信的特性来实现一个简单的聊天室功能。主要功能如下 　　1 用户在浏览器端进入聊天室(创建WebSocket连接)； 　　2 用户端发送消息到服务端(客户端像服务端发信息)； 　　3

WebSocket not closed on reload app(React Native)

由 天大地大妈咪最大 提交于 2020-12-02 13:41:18
问题 I'm using WebSocket with React Native and have some issues on it. When I refresh the app, I found that previous WebSocket connection(used before refresh) was still alive, and not closed properly. Every time I was reloaded the App, it makes new connection. Then I shutdown the app, it releases all connections together. When I'm testing almost same code with browser, when I refresh the page, socket is closed automatically and create new Websocket on page loads. If this problem is still existing

WebSocket not closed on reload app(React Native)

由 筅森魡賤 提交于 2020-12-02 13:36:12
问题 I'm using WebSocket with React Native and have some issues on it. When I refresh the app, I found that previous WebSocket connection(used before refresh) was still alive, and not closed properly. Every time I was reloaded the App, it makes new connection. Then I shutdown the app, it releases all connections together. When I'm testing almost same code with browser, when I refresh the page, socket is closed automatically and create new Websocket on page loads. If this problem is still existing

Proxy websockets connection within webpack-dev-server

由 我的梦境 提交于 2020-12-02 04:50:33
问题 Is it possible to proxy websocket connections within the webpack dev server? I know how to proxy regular HTTP requests to another backend but it's not working for websockets, presumably because the target in the proxy configuration starts with http://... 回答1: Version 1.15.0 of the webpack-dev-server supports proxying websocket connections. Add the following to your configuration: devServer: { proxy: { '/api': { target: 'ws://[address]:[port]', ws: true }, }, } 回答2: Webpack dev server does not

Proxy websockets connection within webpack-dev-server

由 谁说我不能喝 提交于 2020-12-02 04:47:07
问题 Is it possible to proxy websocket connections within the webpack dev server? I know how to proxy regular HTTP requests to another backend but it's not working for websockets, presumably because the target in the proxy configuration starts with http://... 回答1: Version 1.15.0 of the webpack-dev-server supports proxying websocket connections. Add the following to your configuration: devServer: { proxy: { '/api': { target: 'ws://[address]:[port]', ws: true }, }, } 回答2: Webpack dev server does not

Proxy websockets connection within webpack-dev-server

由 前提是你 提交于 2020-12-02 04:46:15
问题 Is it possible to proxy websocket connections within the webpack dev server? I know how to proxy regular HTTP requests to another backend but it's not working for websockets, presumably because the target in the proxy configuration starts with http://... 回答1: Version 1.15.0 of the webpack-dev-server supports proxying websocket connections. Add the following to your configuration: devServer: { proxy: { '/api': { target: 'ws://[address]:[port]', ws: true }, }, } 回答2: Webpack dev server does not

Proxy websockets connection within webpack-dev-server

由 给你一囗甜甜゛ 提交于 2020-12-02 04:45:20
问题 Is it possible to proxy websocket connections within the webpack dev server? I know how to proxy regular HTTP requests to another backend but it's not working for websockets, presumably because the target in the proxy configuration starts with http://... 回答1: Version 1.15.0 of the webpack-dev-server supports proxying websocket connections. Add the following to your configuration: devServer: { proxy: { '/api': { target: 'ws://[address]:[port]', ws: true }, }, } 回答2: Webpack dev server does not

Reliable WebSocket connection state detection

由 a 夏天 提交于 2020-12-01 10:53:27
问题 I've been looking around to implement a reliable WebSocket connection recovery mechanism. After some investigation, I've found that one way is sending hearbeats to the server (ping/pong), and check if I receive the whole pong in a limited time. Thus, either if the connection is actually down or it's very slow it would be considered disconnected if a pong wait timeouts, and code should call WebSocket.close() . At the end of the day, I'm asking this question to validate the connection

Reliable WebSocket connection state detection

由 点点圈 提交于 2020-12-01 10:52:58
问题 I've been looking around to implement a reliable WebSocket connection recovery mechanism. After some investigation, I've found that one way is sending hearbeats to the server (ping/pong), and check if I receive the whole pong in a limited time. Thus, either if the connection is actually down or it's very slow it would be considered disconnected if a pong wait timeouts, and code should call WebSocket.close() . At the end of the day, I'm asking this question to validate the connection

How to use secure websocket (wss) in Tornado

由 元气小坏坏 提交于 2020-12-01 07:55:05
问题 I'm new to Tornado and web services in general. In my application, I've Qt/c++ client and python Tornado on server side. The Qt client sends commands in the form of text messages(e.g. "ws://192.121.1.213:8080? function =myfunction? args =params..").Now, I want to use secure web socket i.e. wss in stead of ws . What changes are required on server and client side? Pointer to any online example would be also helpful. Thanks. 回答1: Pass the ssl_options argument when constructing your HTTPServer :
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