我们有一个网页在www.saddleback.com/live和Chrome和Firefox CORS AJAX调用就会中止对某些Mac机。在与OSX 10.9在Mac（最新更新），Chrome和Firefox（与最新的更新）的AJAX调用http://api.saddleback.com/WorshipService?version=2&null&_=1386201207191被中止。这适用于Safari浏览器。

We have a webpage at www.saddleback.com/live and Chrome and Firefox CORS AJAX calls get aborted on some Mac machines. On a Mac with OSX 10.9 (latest updates), Chrome and Firefox (with latest updates) the AJAX call to http://api.saddleback.com/WorshipService?version=2&null&_=1386201207191 gets aborted. This works on Safari.

此行​​为是孤立的，而是可重复在某些机器上，而不是其他。我们还有其他的Mac机具有相同的操作系统和浏览器版本，成功地打开该网页。

This behavior is isolated but reproducible on some machines but not others. We have other Mac machines with identical OS and browser version that successfully bring up the webpage.

我已经验证Web服务器成功响应500毫秒AJAX请求。然而，Chrome浏览器挂在等待了约30秒的响应，并最终终止通话。我已经包含了铬：//网内部出现故障的电话如下：

I have verified that the web server successfully responds to the AJAX request within 500 milliseconds. Yet Chrome hangs on waiting for the response for ~30 seconds and eventually aborts the call. I've included a the chrome://net-internals for the failed call below:

11645: URL_REQUEST
http://api.saddleback.com/WorshipService?version=2&null&_=1386201207191
Start Time: 2013-12-04 15:53:27.469

t=1386201207469 [st=    0] +REQUEST_ALIVE  [dt=30398]
t=1386201207470 [st=    1]   +URL_REQUEST_START_JOB  [dt=30397]
                              --> load_flags = 143540480 (DO_NOT_SAVE_COOKIES | DO_NOT_SEND_AUTH_DATA | DO_NOT_SEND_COOKIES | ENABLE_LOAD_TIMING | MAYBE_USER_GESTURE | REPORT_RAW_HEADERS | VERIFY_EV_CERT)
                              --> method = "GET"
                              --> priority = 2
                              --> url = "http://api.saddleback.com/WorshipService?version=2&null&_=1386201207191"
t=1386201207470 [st=    1]      HTTP_CACHE_GET_BACKEND  [dt=0]
t=1386201207470 [st=    1]      HTTP_CACHE_OPEN_ENTRY  [dt=0]
                                --> net_error = -2 (ERR_FAILED)
t=1386201207470 [st=    1]      HTTP_CACHE_CREATE_ENTRY  [dt=0]
t=1386201207470 [st=    1]      HTTP_CACHE_ADD_TO_ENTRY  [dt=0]
t=1386201207470 [st=    1]     +HTTP_STREAM_REQUEST  [dt=2]
t=1386201207472 [st=    3]        HTTP_STREAM_REQUEST_BOUND_TO_JOB
                                  --> source_dependency = 11647 (HTTP_STREAM_JOB)
t=1386201207472 [st=    3]     -HTTP_STREAM_REQUEST
t=1386201207472 [st=    3]     +HTTP_TRANSACTION_SEND_REQUEST  [dt=0]
t=1386201207472 [st=    3]        HTTP_TRANSACTION_SEND_REQUEST_HEADERS
                                  --> GET /WorshipService?version=2&null&_=1386201207191 HTTP/1.1
                                      Host: api.saddleback.com
                                      Connection: keep-alive
                                      Accept: application/json, text/javascript, */*; q=0.01
                                      Origin: http://www.saddleback.com
                                      User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36
                                      Content-Type: application/json
                                      Referer: http://www.saddleback.com/onlinecampus/
                                      Accept-Encoding: gzip,deflate,sdch
                                      Accept-Language: en-US,en;q=0.8
t=1386201207472 [st=    3]     -HTTP_TRANSACTION_SEND_REQUEST
t=1386201207472 [st=    3]     +HTTP_TRANSACTION_READ_HEADERS  [dt=30395]
t=1386201207472 [st=    3]       +HTTP_STREAM_PARSER_READ_HEADERS  [dt=30395]
t=1386201237867 [st=30398]          CANCELLED
t=1386201237867 [st=30398]   -URL_REQUEST_START_JOB
                              --> net_error = -3 (ERR_ABORTED)
t=1386201237867 [st=30398] -REQUEST_ALIVE

下面是Wireshark的请求和响应：

Here is the request and response from Wireshark:

请求

GET /WorshipService?version=2&null&_=1386192341441 HTTP/1.1
    [Expert Info (Chat/Sequence): GET /WorshipService?version=2&null&_=1386192341441 HTTP/1.1]
        [Message: GET /WorshipService?version=2&null&_=1386192341441 HTTP/1.1]
        [Severity level: Chat]
        [Group: Sequence]
    Request Method: GET
    Request URI: /WorshipService?version=2&null&_=1386192341441
    Request Version: HTTP/1.1
Host: api.saddleback.com
Connection: keep-alive
Cache-Control: max-age=0
Accept: application/json, text/javascript, */*; q=0.01
Origin: http://www.saddleback.com
User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.57 Safari/537.36
Content-Type: application/json
Referer: http://www.saddleback.com/onlinecampus/
Accept-Encoding: gzip,deflate,sdch
Accept-Language: en-US,en;q=0.8

响应

HTTP/1.1 200 OK
    [Expert Info (Chat/Sequence): HTTP/1.1 200 OK]
        [Message: HTTP/1.1 200 OK]
        [Severity level: Chat]
        [Group: Sequence]
    Request Version: HTTP/1.1
    Status Code: 200
    Response Phrase: OK
Cache-Control: no-cache
Pragma: no-cache
Content-Type: application/json; charset=utf-8
Expires: -1
Server: Microsoft-IIS/7.5
Access-Control-Allow-Origin: http://www.saddleback.com
Access-Control-Allow-Credentials: true
X-AspNet-Version: 4.0.30319
X-Powered-By: ASP.NET
Date: Wed, 04 Dec 2013 21:25:41 GMT
Content-Length: 2841
    [Content length: 2841]
Set-Cookie: NSC_ndxfc1-45*80=ffffffffaf181c9545525d5f4f58455e445a4a423660;expires=Wed, 04-Dec-2013 14:44:34 GMT;path=/;httponly

我已经花了太多时间试图找出为什么这个失败的一些Mac的配置，而不​​是别人。任何帮助将是非常美联社preciated。

I have spent too much time trying to figure out why this is failing on some Mac configuration and not others. Any help would be much appreciated.

推荐答案

花费很长的时间在寻找低级别的网络数据包，试图找到问题之后。原来，病毒扫描程序挡住了电话。关闭网络扫描，它开始工作。

After spending a very long time looking at low level network packets to try and find the issue. It turned out that the virus scanner was blocking the call. Turning off the web scanning, it started working.

在短暂的Sophos挡住api.saddleback.com在Firefox和Chrome，但不是在Safari浏览器。进入数字。

In short Sophos was blocking api.saddleback.com on Firefox and Chrome, but not on Safari. Go figure.