websocket

Problems then arise when the client or the server starts sending the first WebSocket frame .

而当客户端或服务器开始发送第一个WebSocket帧时问题就出现了。

The network traffic is made up of WebSocket frames and not HTTP requests and responses .

网络传输是由WebSocketframes构成的，而非HTTP请求与响应。

It all comes down to understanding the end-to-end network topology you are deploying your WebSocket application in .

所有都归结到要理解你所要部署WebSocket应用的端到端网络拓扑。

Will proxy servers automatically kill WebSocket connections ?

代理服务器是否会自动中断WebSocket连接？

Therefore , a well-behaved transparent proxy server will cause the WebSocket upgrade handshake to fail almost immediately .

因此，一个工作良好的透明代理服务器几乎会立刻引起WebSocekt升级握手失败。

Unlike regular HTTP traffic , which uses a request / response protocol , WebSocket connections can remain open for a long time .

跟常规的使用请求/响应协议的HTTP传输不一样，WebSocket连接可以长时间保持打开。

Once established , WebSocket data frames can be sent back and forth between the client and the server in full-duplex mode .

一旦连接建立，WebSocket数据帧就可以以全双工的模式在客户端和服务器之间来回传输。

After those handshakes succeed , WebSocket traffic can start flowing unimpeded through the proxy server .

这系列的握手成功后，WebSocket信息流就可以开始无阻碍的通过代理服务器了。

If adopted , WebSocket will deprecate the HTTP long-polling mechanisms in use by developers today .

如果采用，那么WebSocket将会代替目前开发者所使用的HTTP长轮询机制。

It introduces the WebSocket interface and defines a full-duplex communication channel that operates through a single socket over the Web .

它引入了WebSocket接口并且定义了一个全双工的通信通道，通过一个单一的套接字在Web上进行操作。

This means that the load-balancing router stays out of the way of the actual WebSocket traffic , thus reducing latency .

这意味着负载均衡路由器不介入真正的WebSocket流量，由此减少了延迟。

In the future , however , proxy servers will likely become Web Sockets-aware and able to properly handle and forward WebSocket traffic .

然而，未来，代理服务器将会是WebSocket可知的，并且能够合理的处理与转发WebSocket信息流。

A WebSocket server that is used in such a scenario must be added to the white list of servers for connections to be successful .

在这种场景中使用的WebSocket服务器必须被加入到服务器白名单中，连接才有可能成功。

Unencrypted WebSocket Connections and Transparent Proxy Servers

未加密的WebSocket连接与透明代理服务器

The iPad originally shipped with a websocket implementation , then it was removed , and then it was added back .

iPad最初带有一个WebSockets实现，然后又移除了，后来又加回来了。

CometD supports all the features discussed in this blog and makes them available transparently to browsers with or without websocket support .

CometD支持这篇博客所谈到的所有特性，并让它们对浏览器完全透明，无论是否支持WebSocket都可以做到。

Unfortunately the simple chat example does not implement this semantic because the websocket protocol allows for an idle timeout of the connection .

不幸的是，即便是这么简单的用例都无法通过WebSocket实现，因为在该协议中，连接有一个闲置超时。

When the explicit proxy server allows the CONNECT method , the TLS handshake is sent , followed by the WebSocket connection upgrade handshake .

当显式的代理服务器允许CONNECT方法时，TLS握手被发送出去，后面紧跟着WebSocket连接升级握手。

It is even possible for proxy servers to have their own explicit proxy servers , increasing the number of hops the WebSocket traffic has to make .

代理服务器甚至还有可能有它们自己的显式的代理服务器，这又增加了WebSocket传输需要的中继数。

In the future , WebSocket gateways and servers may even be able to dynamically upgrade to Web Sockets Secure if an uncooperative proxy server is detected .

未来，WebSocket网关和服务器能够支持在探测到不合作的代理服务器时，动态地升级到WebSocket安全。

When a proxy server forwards a request to the ( WebSocket ) server , it is expected to strip off certain headers , including the Connection header .

当代理服务器将请求转发到（WebSocket）服务器时，将会被剥去一些特定的消息头，包括Connection消息头。

In order to maintain presence , the chat application can send keep-alive messages on the websocket to prevent it being closed due to an idle timeout .

为了保持存在的状态，聊天应用要发送“连接保持（KeepAlive）”的消息给WebSocket，来避免该连接因为闲置超时而关闭。

We are hopeful that websocket usage will be able to give us even better throughput and latency for cometd than the already impressive results achieved with long polling .

我们真心希望WebSocket可以给我们更大的吞吐量和更低的延迟，比现在已经让人印象深刻的长轮询要更好。

The problem lies not with web browsers , nor truly WebSocket , but with poorly implemented caching proxies which sit on most corporate and enterprise firewalls .

问题并不是出现在Web浏览器端，也不是WebSocket本身的问题，而是大多数公司与企业防火墙缓存代理的糟糕实现。

While this is arguably a proxy server bug , the authors of the paper are advocating that the websocket should no longer use this mechanism and instead use an alternative .

虽说这可能是代理服务器的Bug，但文章作者还是建议Websocket不应该再使用这种机制了，应该使用其他方案。

WebSocket is a draft protocol intending to define a bi-directional full-duplex communication protocol to allow web browsers and web servers to communicate without the HTTP protocol overhead .

WebSocket是个草案协议，用于定义双向全工的通信协议，以便让Web浏览器和Web服务器能够无需通过HTTP协议就可以实现相互间的通信。

The specification defines a ws : / / and a wss : / / scheme to indicate WebSocket and WebSocket Secure connections , respectively .

该规范定义了ws：//以及wss：//模式来分别表示WebSocket和安全WebSocket连接。

Therefore , it is always best to use Web Sockets Secure with TLS encryption to connect to a WebSocket server , unless you 're absolutely certain there are no intermediaries .

因此，始终与TLS加密一起使用WebSockets安全来连接到WebSocket服务器是最佳的做法，除非你非常确实不会存在中间服务器。

Kaazing WebSocket Gateway is a highly optimized , proxy-aware WebSocket gateway , which provides native WebSocket support as well as Web Socket emulation for older browsers .

kaazingWebSocket网关是高度优化的，代理感知的WebSocket网关，提供原生的WebSocket支持和针对上一代浏览器的WebSocket模拟功能。

General consensus is that eventual adoption of WebSocket in inevitable yet in an altered form to alleviate the current security concerns , but some feel XMPP sufficiently solves the same problem space .

人们所达成的共识是最终采用WebSocket可以在一定程度上减少目前的安全问题，但也有一些人认为XMPP完全可以解决这些问题。