chat

（本文转自知乎上别人分享的一篇文章，让我这个初学者对于websocket有了形象的理解，特此拿来与大家分享） 一、websocket与http WebSocket是HTML5出的东西（协议），也就是说HTTP协议没有变化，或者说没关系，但HTTP是不支持持久连接的（长连接，循环连接的不算） 首先HTTP有 1.1 和 1.0 之说，也就是所谓的 keep-alive ，把多个HTTP请求合并为一个，但是 Websocket 其实是一个新协议，跟HTTP协议基本没有关系，只是为了兼容现有浏览器的握手规范而已，也就是说它是HTTP协议上的一种补充可以通过这样一张图理解 有交集，但是并不是全部。 另外Html5是指的一系列新的API，或者说新规范，新技术。Http协议本身只有1.0和1.1，而且跟Html本身没有直接关系。。通俗来说，你可以用HTTP协议传输非Html数据，就是这样=。= 再简单来说，层级不一样。 二、Websocket是什么样的协议，具体有什么优点 首先，Websocket是一个持久化的协议，相对于HTTP这种非持久的协议来说。简单的举个例子吧，用目前应用比较广泛的PHP生命周期来解释。 HTTP的生命周期通过 Request 来界定，也就是一个 Request 一个 Response ，那么在 HTTP1.0 中，这次HTTP请求就结束了。 在HTTP1

I'm looking to implement a chatroom interface for an ASP.NET page. I'm in the process of learning WCF and it seems that it is appropriate for a chat application. Before I get too involved into WCF I want to be sure it is the right choice to make for developing a chat application in ASP.NET. Can anyone provide any feedback? I found a few example applications that primarily use Silverlight with WCF for chat applications. Are there any limitations if I choose not to use Silverlight? Also, any alternatives to WCF that I would have full control over would be very helpful. I'm aware I can use AJAX

We have a social networking site where people have contacts and we want it to be integrated with XMPP. We currently use ejabberd XMPP server. Here are my questions: How to properly create account? Right now, what I'm thinking is on user registration on our web app, we'd call a script that would execute an ejabberd command to create a user. User authentication. Upon user login on our website, the user would be automatically logged in on the chat system. How do you do this on the client side with strophe.js? As I understand, you need to provide JID and password for authentication, so I'm

OK, I wanted to make an python application that allows me to send a message over LAN. Here's the code that "works" "locally" (imagine that I'm forming 2 of my fingers to make an " on those 2 words) username = input("username: ") run = 1 while run == 1: message = input(username + ": ") if message == "exit": print(username + " left") run = 0 else: print(username + ": " + message) My question how do I send the variable "message" over LAN? I wan't it to send the variable message over LAN to another PC and print it on it and the other way around. Here are several files that may help you with

I have a chat app running on Node JS express with Socket io. Previously clients were getting disconnected when they send a large picture over 4 MB, i found out socket io cannot handle/stream/send such large data in Base64 over socket emit events. So I ended up using this socket io file upload module . Now I am using socket io file upload module to let users upload pics/files during their chats. Now even if i upload biggest images/files chat doesn't get disconnect. However, clients are still getting randomly disconnected with many errors like ping timeout, transport close etc even when they are

I'm trying to send a chat message in Facebook using Javascript, but keep getting an error message. Either it being TypeError: Object #<NodeList> has no method 'WHATEVERIPUTHERE' Basically o = the chat text area. The o.WHATEVERIPUTHERE("Hello!") is what I'm trying to do (setting a value for the text area, and sending it) This is what I have tried: var o = document.getElementsByClassName("uiTextareaAutogrow _552m"); o.WHATEVERIPUTHERE("Hello!"); document.getElementsByClassName returns an array of elements. In this case they will have same number with the chat boxes opened. I wrote it in pure