使用 cURL 仅从 HTTP POST 获取响应标头 [英] Getting only response header from HTTP POST using cURL

问题描述

只能使用 HTTP HEAD 请求标头，作为 curl(1) 中的选项 -I.

One can request only the headers using HTTP HEAD, as option -I in curl(1).

$ curl -I /

冗长的 HTML 响应正文很难在命令行中使用，因此我只想获取标头作为我的 POST 请求的反馈.但是，HEAD 和 POST 是两种不同的方法.

Lengthy HTML response bodies are a pain to get in command-line, so I'd like to get only the header as feedback for my POST requests. However, HEAD and POST are two different methods.

如何让 cURL 仅显示 POST 请求的响应标头?

How do I get cURL to display only response headers to a POST request?

推荐答案

-D, --dump-header <file>
       Write the protocol headers to the specified file.

       This  option  is handy to use when you want to store the headers
       that a HTTP site sends to you. Cookies from  the  headers  could
       then  be  read  in  a  second  curl  invocation by using the -b,
       --cookie option! The -c, --cookie-jar option is however a better
       way to store cookies.

和

-S, --show-error
       When used with -s, --silent, it makes curl show an error message if it fails.

和

-L/--location
      (HTTP/HTTPS) If the server reports that the requested page has moved to a different location (indicated with a Location: header and a 3XX response
      code), this option will make curl redo the request on the new place. If used together with -i/--include or -I/--head, headers from  all  requested
      pages  will  be  shown.  When authentication is used, curl only sends its credentials to the initial host. If a redirect takes curl to a different
      host, it won’t be able to intercept the user+password. See also --location-trusted on how to change this. You can limit the amount of redirects to
      follow by using the --max-redirs option.

      When curl follows a redirect and the request is not a plain GET (for example POST or PUT), it will do the following request with a GET if the HTTP
      response was 301, 302, or 303. If the response code was any other 3xx code, curl will re-send the following  request  using  the  same  unmodified
      method.

来自手册页.所以

curl -sSL -D - www.acooke.org -o /dev/null

遵循重定向，将标头转储到 stdout 并将数据发送到/dev/null(这是 GET，而不是 POST，但您可以使用 POST 做同样的事情 - 只需添加您已经使用的任何选项发布数据)

follows redirects, dumps the headers to stdout and sends the data to /dev/null (that's a GET, not a POST, but you can do the same thing with a POST - just add whatever option you're already using for POSTing data)

注意-D后面的-表示输出文件"是stdout.

note the - after the -D which indicates that the output "file" is stdout.

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