http://www.jackxiang.com/index.php zh-cn http://www.jackxiang.com/post// jack <xdy108@126.com> Mon, 02 Dec 2013 08:52:31 +0000 http://www.jackxiang.com/post//
-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：
curl -s -b "sid=g1xecq; wiscookieid=142b1f7f5896ccfb; kossid=u0lfi91elib6fud84qcglfpan2; language1=zh; cachekey=fe60514b43d5e5906154002236319fc5;__gads=id=1142368c3f659057:t=1376885182:s=alni_mbrtowdkh-ojf-8kv1dvggpuplj_a;history_list=5edc7dec-4dbf-11e3-bf9b-b9856d949d58;" -d"action=update&source=1&data=XXX" -D- -o/dev/null "http://jackxiang.com/api/play/record "
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：

      POST /api/play/record HTTP/1.1     User-Agent: curl/7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2     Host: my.xiyou.cntv.cn     Accept: */*     Cookie: sid=g1xecq; wiscookieid=142b1f7f5896ccfb; kossid=u0lfi91elib6fud84qcglfpan2; language1=zh; cachekey=fe60514b43d5e5906154002236319fc5;__gads=id=1142368c3f659057:t=1376885182:s=alni_mbrtowdkh-ojf-8kv1dvggpuplj_a;history_list=5edc7dec-4dbf-11e3-bf9b-b9856d949d58;     Content-Length: 260     Content-Type: application/x-www-form-urlencoded   
  而Post数据就在：HTML Form URL Encoded: application/x-www-form-urlencoded 下展开里面：
    action=update&source=1&data=XXX    ]]> http://www.jackxiang.com/post//#blogcomment <user@domain.com> Thu, 01 Jan 1970 00:00:00 +0000 http://www.jackxiang.com/post//#blogcomment