在客户端定义传输类型

Question

我需要对IE使用jsonp-polling,对Firefox使用xhr-polling,所以我尝试在客户端定义传输类型,如下所示:

    if (/Firefox[\/\s](\d+\.\d+)/.test(navigator.userAgent)){ //test for Firefox/x.x or Firefox x.x (ignoring remaining digits); 
            var socket = io.connect(VG.NODE_SERVER_URL,{ 
                    transports:['xhr-polling'] 
            }); 
    } else if (/MSIE (\d+\.\d+);/.test(navigator.userAgent)){ 
            var socket = io.connect(VG.NODE_SERVER_URL,{ 
                    transports:['jsonp-polling'] 
            }); 
    } else { 
            var socket = io.connect(VG.NODE_SERVER_URL); 
    }

我在Firefox上测试了它,并在socket.io-client lib上添加了日志.在

https://github.com/LearnBoost/socket.io-client/blob/master/dist/socket.io.js#L1509

option.transports是["xhr-polling", "flashsocket", "htmlfile", "xhr-polling", "jsonp-polling"],这是对的.但是,在

https://github.com/LearnBoost/socket.io-client/blob/master/dist/socket.io.js#L1679

我不知道为什么传输会改变["htmlfile", "jsonp- polling", "xhr-polling"],它与我在服务器端定义的顺序相同.

为什么不使用之前的选项？

Answer 1

现在修复了socket.io版本0.9.6中的错误,我可以使用它,它工作正常:

socket = io.connect(HOST_REMOTE, {
    transports: ['xhr-polling']
});

在1.0.0及更高版本中:

socket = io.connect(HOST_REMOTE, {
    transports: ['polling']
});