Safari两次提交Ajax调用 [英] Safari double-submitting ajax calls

问题描述

我注意到Safari 5.0.5(6533.21.1)似乎正在提交重复的ajax调用.当我运行以下简化的测试用例时:

I have noticed that Safari 5.0.5 (6533.21.1) seems to be submitting duplicate ajax calls. When I run the following reduced test case:

// jquery 1.6 include
$(document).ready(function() {
    setTimeout(function(e) {
        var req1 = $.getJSON('/api/private/customers.json');
        console.log('req1 sent');
    }, 2000);
    setTimeout(function(e) {
        var req2 = $.getJSON('/api/private/customers.json');
        console.log('req1 sent');
    }, 4000);
});

"Safari资源"面板和控制台显示了两个xhr请求，但是我的服务器日志显示了三个xhr请求进入:

the Safari Resources panel and the console show two xhr requests going out, but my server log shows three xhr requests coming in:

XX.XX.XX.XXX - - [10/May/2011:16:50:40 -0400] "GET /api/private/customers.json HTTP/1.1" 200 183 "https://sub.mydomain.com/customers" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1"
XX.XX.XX.XXX - - [10/May/2011:16:50:42 -0400] "GET /api/private/customers.json HTTP/1.1" 200 183 "https://sub.mydomain.com/customers" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1"
XX.XX.XX.XXX - - [10/May/2011:16:50:42 -0400] "GET /api/private/customers.json HTTP/1.1" 200 183 "https://sub.mycomain.com/customers" "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_7; en-us) AppleWebKit/533.21.1 (KHTML, like Gecko) Version/5.0.5 Safari/533.21.1"

当我使用最新版本的Firefox发出相同的请求时，我正确地收到了两个请求:

When I make the same request with the latest version of Firefox, I correctly get two requests:

XX.XX.XX.XXX - - [10/May/2011:16:52:00 -0400] "GET /api/private/customers.json HTTP/1.1" 200 183 "https://sub.mycomain.com/customers" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1"
XX.XX.XX.XXX - - [10/May/2011:16:52:02 -0400] "GET /api/private/customers.json HTTP/1.1" 200 183 "https://sub.mycomain.com/customers" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1"

在第一个请求上似乎没有发生这种情况，但是所有后续请求都重复发送.有人知道发生了什么吗?在js中检测额外请求的努力是徒劳的.

This behavior does not seem to happen on the first request, but all subsequent requests are sent in duplicate. Does anyone have any idea what is going on? Efforts to detect the extra requests in the js were futile.

推荐答案

在API响应中添加 Connection:Close 标头可解决此问题.

Adding a Connection: Close header to the API response fixes the problem.

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