Objective: Get HTTP response headers of a URL in a shell script.
We can use either curl or wget to get HTTP headers.
For curl, use the following syntax.
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$ curl -I www.google.com HTTP/1.1 302 Found Cache-Control: private Content-Type: text/html; charset=UTF-8 Location: http://www.google.com.sg/?gfe_rd=cr&ei=wWY7VeCxM6KW8QflkoCADw Content-Length: 262 Date: Sat, 25 Apr 2015 10:04:49 GMT Server: GFE/2.0 Alternate-Protocol: 80:quic,p=1 |
wget normally follows HTTP redirect (HTTP status code 30x). To prevent wget from following redirects, we have to use the “--max-redirect 0” option. Use wget with the following syntax.
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$ wget --server-response --max-redirect 0 --quiet www.google.com HTTP/1.1 302 Found Cache-Control: private Content-Type: text/html; charset=UTF-8 Location: http://www.google.com.sg/?gfe_rd=cr&ei=emg7Vda2LqqW8QeG-IGICw Content-Length: 262 Date: Sat, 25 Apr 2015 10:12:10 GMT Server: GFE/2.0 Alternate-Protocol: 80:quic,p=1 |
Mohamed Ibrahim
ibrahim = { interested_in(unix, linux, android, open_source, reverse_engineering); coding(c, shell, php, python, java, javascript, nodejs, react); plays_on(xbox, ps4); linux_desktop_user(true); }
