Transport=ServersentEvents时未调用SignalR客户端函数

Question

在我的机器上，我发现Chrome中没有调用SignalR客户端函数。

在客户端代码中，我使用

$.connection.hub.logging = true;

我可以在Chrome的javascript控制台中看到与成功连接相对应的日志消息。为了参考，这些日志消息是

[20:22:16 GMT+0800 (W. Australia Standard Time)] SignalR: Negotiating with '/SignalRChat-RC/signalr/negotiate'. jquery.signalR-1.0.0-rc2.js:54
[20:22:16 GMT+0800 (W. Australia Standard Time)] SignalR: Attempting to connect to SSE endpoint 'http://localhost/SignalRChat-RC/signalr/connect?transport=serverSentEvents&…7-22c5dbf27e0d&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D&tid=3' jquery.signalR-1.0.0-rc2.js:54
[20:22:16 GMT+0800 (W. Australia Standard Time)] SignalR: EventSource connected jquery.signalR-1.0.0-rc2.js:54
[20:22:16 GMT+0800 (W. Australia Standard Time)] SignalR: Now monitoring keep alive with a warning timeout of 40000 and a connection lost timeout of 60000 jquery.signalR-1.0.0-rc2.js:54

但是当调用客户端方法时，Chrome的javascript控制台不会记录消息。

$.connection.hub.start({ transport: 'longPolling' })

$(function () {
    // Turn on logging to the javascript console
    $.connection.hub.logging = true;

    // set up an error-handling function
    $.connection.hub.error(function (err) {
        alert("Error signalR:" + JSON.stringify(err));
    });

    // Declare a proxy to reference the hub.  
    var chat = $.connection.chatHub;

    // Create a function that the hub can call to broadcast messages.
    // This function is never called when running in Chrome with the default signalR connection
    chat.client.broadcastMessage = function (name, message) {
        // Html encode display name and message.  
        var encodedName = $('<div />').text(name).html();
        var encodedMsg = $('<div />').text(message).html();
        // Add the message to the page.  
        $('#discussion').append('<li><strong>' + encodedName
            + '</strong>:&nbsp;&nbsp;' + encodedMsg + '</li>');
    };

    // Get the user name and store it to prepend to messages. 
    $('#displayname').val(prompt('Enter your name:', ''));
    // Set initial focus to message input box.   
    $('#message').focus();

    // Start the connection. 
    // Use $.connection.hub.start({ transport: 'longPolling' }) for reliability
    // Use $.connection.hub.start() to demonstrate that Chrome doesn't receive messages
    $.connection.hub.start().done(function () {
        // Enable the "Send" button
        $('#sendmessage').removeAttr('disabled');
        $('#sendmessage').click(function () {
            // Call the Send method on the hub.  
            chat.server.send($('#displayname').val(), $('#message').val());
            // Clear text box and reset focus for next comment.  
            $('#message').val('').focus();
        });
    });
});

Answer 1

我在Win7谷歌Chrome24上试了一下，效果很好。

您可以解决安装Fiddler和在javascript中设置断点的问题

POST /signalr/send?transport=serverSentEvents&connectionId=6ff0bffa-c31e-4d85-9aff-24f4528555ee HTTP/1.1
Host: localhost:43637
Connection: keep-alive
Content-Length: 113
Accept: application/json, text/javascript, */*; q=0.01
Origin: 
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.17 (KHTML, like Gecko) Chrome/24.0.1312.57 Safari/537.17
Content-Type: application/x-www-form-urlencoded
Referer: /index.html
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.3

data=%7B%22H%22%3A%22chathub%22%2C%22M%22%3A%22Send%22%2C%22A%22%3A%5B%22gus%22%2C%22hello%22%5D%2C%22I%22%3A0%7D