背景：我在写http://jackxiang.com/post/4070/ 时发现的（Post并cookie，想看http头不行），一看还真有这个问题，主要是http头部Cookie值是否真送出去了以及Post数据是否也按指定方式给Post出去，查看加密前的待发送的数据的包头信息，以查看待发送头部的cookie信息等都有用的。于是做下记录。
-d是用post提交表单，-I是只读取http head，提示错误Warning: You can only select one HTTP request!
来自：http://bbs.csdn.net/topics/320186919
实践：的确Warning: You can only select one HTTP request!
国外：http://stackoverflow.com/questions/286982/curl-post-data-and-headers-only
Curl post data and headers only
I want to get the headers only from a curl request
curl -I www.google.com
All grand. Now I want to do that but to pass in post data too:
curl -I -d'test=test' www.google.com
But all I get is:
Warning: You can only select one HTTP request!
Anyone have any idea how to do this or am I doing something stupid?
2 Answers
The -I option tells curl to do a HEAD request while the -d'test=test' option tells curl to do a POST, so you're telling curl to do two different request types.
curl -s -d'test=test' -D- -o/dev/null www.google.com
or, on Windows:
curl -s -d'test=test' -D- -onul: www.google.com
That is the neatest way to do this as far as I can find. The options are:
-D- Dump the header to the file listed, or stdout when - is passed, like this.
-o/dev/null Send the body to the file listed. Here, we discard the body so we only see the headers.
-s Silent (no progress bar)
-d means you are sending form data, via the POST method. -I means you are just peeking at the metadata via HEAD.
I'd suggest either
Download to /dev/null and write the headers via the -D headerfile to the file headerfile
Use -i to include the headers in the answers and skip everything from the first empty line.
Old, I know, but I would suggest adding -s to clean up the output a little bit.
最后使用方法：
1）于是，返回服务端的头很容易看到，如下：
HTTP/1.1 200 OK
Server: nginx
Date: Mon, 02 Dec 2013 09:57:59 GMT
Content-Type: text/html;charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
2）最后，想看发出的请求头？
背景里说的：http头部Cookie值是否真送出去了以及Post数据是否也按指定方式给Post出去
请求的头用 curl 是看不到的
—————解决方案—————
抓包软件
（1）Windows下：firefox用firebug/httpfox/fiddler2/httplook/HttpAnalyzerStdV7
网卡用SmartSniff
（2）Linux下：用tcpdump抓包后，sz到windows上用wireshark查看http包发送的请求头：
File->ExportObjects->HTTP->找到发送的请求链接（因为还有一个回包的请求，所以要区分开），选中后，在主界面会自动定位到，展开：
Hypertext Transfer protocol ，就能看到如下我前面发的cookie：
而Post数据就在：HTML Form URL Encoded: application/x-www-form-urlencoded 下展开里面：
-d是用post提交表单，-I是只读取http head，提示错误Warning: You can only select one HTTP request!
来自：http://bbs.csdn.net/topics/320186919
实践：的确Warning: You can only select one HTTP request!
国外：http://stackoverflow.com/questions/286982/curl-post-data-and-headers-only
Curl post data and headers only
I want to get the headers only from a curl request
curl -I www.google.com
All grand. Now I want to do that but to pass in post data too:
curl -I -d'test=test' www.google.com
But all I get is:
Warning: You can only select one HTTP request!
Anyone have any idea how to do this or am I doing something stupid?
2 Answers
The -I option tells curl to do a HEAD request while the -d'test=test' option tells curl to do a POST, so you're telling curl to do two different request types.
curl -s -d'test=test' -D- -o/dev/null www.google.com
or, on Windows:
curl -s -d'test=test' -D- -onul: www.google.com
That is the neatest way to do this as far as I can find. The options are:
-D- Dump the header to the file listed, or stdout when - is passed, like this.
-o/dev/null Send the body to the file listed. Here, we discard the body so we only see the headers.
-s Silent (no progress bar)
-d means you are sending form data, via the POST method. -I means you are just peeking at the metadata via HEAD.
I'd suggest either
Download to /dev/null and write the headers via the -D headerfile to the file headerfile
Use -i to include the headers in the answers and skip everything from the first empty line.
Old, I know, but I would suggest adding -s to clean up the output a little bit.
最后使用方法：
1）于是，返回服务端的头很容易看到，如下：
HTTP/1.1 200 OK
Server: nginx
Date: Mon, 02 Dec 2013 09:57:59 GMT
Content-Type: text/html;charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Vary: Accept-Encoding
2）最后，想看发出的请求头？
背景里说的：http头部Cookie值是否真送出去了以及Post数据是否也按指定方式给Post出去
请求的头用 curl 是看不到的
—————解决方案—————
抓包软件
（1）Windows下：firefox用firebug/httpfox/fiddler2/httplook/HttpAnalyzerStdV7
网卡用SmartSniff
（2）Linux下：用tcpdump抓包后，sz到windows上用wireshark查看http包发送的请求头：
File->ExportObjects->HTTP->找到发送的请求链接（因为还有一个回包的请求，所以要区分开），选中后，在主界面会自动定位到，展开：
Hypertext Transfer protocol ，就能看到如下我前面发的cookie：
而Post数据就在：HTML Form URL Encoded: application/x-www-form-urlencoded 下展开里面：
作者：jackxiang@向东博客 专注WEB应用 构架之美 --- 构架之美，在于尽态极妍 | 应用之美，在于药到病除
地址：https://jackxiang.com/post/6849/
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最后编辑： jackxiang 编辑于2013-12-3 10:43
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