Simple tool to show the headers from GET-ing a URL
The problem this solves is that when you use curl -I it does a HEAD request, potentially changing the result, and when you do curl -i it also dumps the page HTML on you. This does a GET and returns those results—including any doubled headers. It also (optionally) downloads the body of the page and returns speed and timing information.
First install Go.
If you just want to install the binary to your current directory and don't care about the source code, run
GOBIN=$(pwd) go install github.com/carlmjohnson/get-headers@latest$ get-headers https://www.example.com
GET https://www.example.com
HTTP/1.1 200 OK
Cache-Control max-age=604800
Content-Type text/html
Date Fri, 15 Jan 2016 13:40:38 GMT
Etag "359670651+gzip"
Expires Fri, 22 Jan 2016 13:40:38 GMT
Last-Modified Fri, 09 Aug 2013 23:54:35 GMT
Server ECS (iad/18CB)
Vary Accept-Encoding
X-Cache HIT
X-Ec-Custom-Error 1
Time 100ms 204µs
Content length 1.2 KB
Speed 12.4 KB/s
$ get-headers -gzip http://www.example.com
GET http://www.example.com
HTTP/1.1 200 OK
Cache-Control max-age=604800
Content-Encoding gzip
Content-Length 606
Content-Type text/html
Date Fri, 15 Jan 2016 13:43:28 GMT
Etag "359670651+gzip"
Expires Fri, 22 Jan 2016 13:43:28 GMT
Last-Modified Fri, 09 Aug 2013 23:54:35 GMT
Server ECS (iad/182A)
Vary Accept-Encoding
X-Cache HIT
X-Ec-Custom-Error 1
Time 9ms 709µs
Content length 606
Speed 60.9 KB/s
$ get-headers -h
Usage of get-headers v0.21.1:
get-headers [opts] <url>...
Gets the URLs and prints their headers alphabetically.
Repeated headers are printed with an asterisk.
Options may be set as GET_HEADERS prefixed environment variables.
-cookie string
Set cookie header
-etag value
Set 'If-None-Match' header to etag value
-g Shortcut for -gzip
-gzip
Enable GZIP compression
-i Shortcut for -ignore-body
-ignore-body
Ignore body of request; close connection after gettings the headers