curl usage to get header

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无人共我
无人共我 2021-01-30 20:12

Why does this not work:

curl -X HEAD http://www.google.com

But these both work just fine:

curl -I http://www.google.com

curl -         


        
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  • 2021-01-30 20:47

    You need to add the -i flag to the first command, to include the HTTP header in the output. This is required to print headers.

    curl -X HEAD -i http://www.google.com
    

    More here: https://serverfault.com/questions/140149/difference-between-curl-i-and-curl-x-head

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  • 2021-01-30 20:54

    curl --head https://www.example.net

    I was pointed to this by curl itself; when I issued the command with -X HEAD, it printed:

    Warning: Setting custom HTTP method to HEAD with -X/--request may not work the 
    Warning: way you want. Consider using -I/--head instead.
    
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  • 2021-01-30 21:00

    google.com is not responding to HTTP HEAD requests, which is why you are seeing a hang for the first command.

    It does respond to GET requests, which is why the third command works.

    As for the second, curl just prints the headers from a standard request.

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