问题出在您的Web服务器上，它将content-length设置为0，这意味着这是一个有效值，如您在HTTP /
1.1规范中所见。
我还在JSFiddle上举了一个例子，展示了错误和成功的例子。看这里。
错误示例的标头：
请求：
GET /error/ HTTP/1.1Host: fiddle.jshell.netConnection: keep-aliveAccept: application/json, text/plain, */*User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31DNT: 1Referer: http://fiddle.jshell.net/danielcsgomes/cAMc6/1/show/Accept-Encoding: gzip,deflate,sdchAccept-Language: en-US,en;q=0.8Accept-Charset: UTF-8,*;q=0.5cookie: csrftoken=4tNVNxC5v6BSq9yJCKkHlGFJBz3cClqd`
响应：
HTTP/1.1 404 NOT FOUNDServer: nginx/0.8.54Date: Fri, 12 Apr 2013 00:38:07 GMTContent-Type: text/html; charset=utf-8Transfer-Encoding: chunkedConnection: keep-aliveVary: cookieContent-Encoding: gzip
