应用错误收集

实际上我正在编写使用winsock c ++在HTTP中下载文件的代码并获取详细信息我解雇了“HEAD”标题..

（这实际上是我做的）

HEAD /files/ODBC%20Programming%20in%20C%2B%2B.pdf HTTP/1.0
Host: devmentor-unittest.googlecode.com

回应是：

HTTP/1.0 404 Not Found
Content-Type: text/html; charset=UTF-8
Set-Cookie: PREF=ID=feeed8106df5e5f1:TM=1370157208:LM=1370157208:S=10bN4nrXqkcCDN5n; expires=Tue, 02-Jun-2015 07:13:28 GMT; path=/; domain=devmentor-unittest.googlecode.com
X-Content-Type-Options: nosniff
Date: Sun, 02 Jun 2013 07:13:28 GMT
Server: codesite_downloads
Content-Length: 974
X-XSS-Protection: 1; mode=block
X-Frame-Options: SAMEORIGIN

但如果我这样做：

GET /files/ODBC%20Programming%20in%20C%2B%2B.pdf HTTP/1.0
Host: devmentor-unittest.googlecode.com

文件成功下载....

在我下载之后，再次，如果我触发HEAD请求......它还会显示以下内容

HTTP/1.0 200 OK
Content-Length: 320381
Content-Type: application/pdf
Content-Disposition: attachment; filename="ODBC Programming in C++.pdf"
Accept-Ranges: bytes
Date: Sun, 02 Jun 2013 05:47:11 GMT
Last-Modified: Sun, 11 Nov 2007 03:17:59 GMT
Expires: Sun, 09 Jun 2013 05:47:11 GMT
Cache-Control: public, max-age=604800
Server: DFE/largefile
//something like this.....

问题：为什么“HEAD”首先返回错误的“错误未找到”，但是使用“GET”下载文件，下载“HEAD”后还返回我需要的好东西......哪里有错误..

我想在这里下载的文件是“http://devmentor-unittest.googlecode.com/files/ODBC%20Programming%20in%20C%2B%2B.pdf”（仅举例）

在winsock c ++中写出正确的“HEAD”和“GET”请求

1 个答案: