what is header
Header : exists in both request and response
is metadata about the request
It's a key value pair
few common header type is
Accept header to specify what format you want to get your result
only if the api itself support
Content Type
in request header :
to specify what kind of data we are sending
to the server
in response header :
what was the contenttype we got as responseHTTP Header
$ curl -u my_client_id:my_client_secret https://api.github.com/user/repos
> HTTP/2 200
> Date: Mon, 01 Jul 2013 17:27:06 GMT
> X-RateLimit-Limit: 5000
> X-RateLimit-Remaining: 4966
> X-RateLimit-Reset: 1372700873HTTP Header
User-Agent: Awesome-Octocat-AppRequest header
$ curl -I https://api.github.com -H "Origin: http://www.airnovaet.com"
HTTP/2 302
Access-Control-Allow-Origin: *
Access-Control-Expose-Headers: ETag, Link, X-GitHub-OTP, X-RateLimit-Limit, X-RateLimit-Remaining, X-RateLimit-Reset, X-OAuth-Scopes, X-Accepted-OAuth-Scopes, X-Poll-IntervalRequest header
$ curl -I https://api.github.com/user
> HTTP/2 200
> Cache-Control: private, max-age=60
> ETag: "644b5b0155e6404a9cc4bd9d8b1ae730"
> Last-Modified: Thu, 05 Jul 2012 15:31:30 GMT
> Vary: Accept, Authorization, Cookie
> X-RateLimit-Limit: 5000
> X-RateLimit-Remaining: 4996
> X-RateLimit-Reset: 1372700873
$ curl -I https://api.github.com/user -H 'If-None-Match: "644b5b0155e6404a9cc4bd9d8b1ae730"'
> HTTP/2 304
> Cache-Control: private, max-age=60
> ETag: "644b5b0155e6404a9cc4bd9d8b1ae730"
> Last-Modified: Thu, 05 Jul 2012 15:31:30 GMT
> Vary: Accept, Authorization, Cookie
> X-RateLimit-Limit: 5000
> X-RateLimit-Remaining: 4996
> X-RateLimit-Reset: 1372700873
$ curl -I https://api.github.com/user -H "If-Modified-Since: Thu, 05 Jul 2012 15:31:30 GMT"
> HTTP/2 304
> Cache-Control: private, max-age=60
> Last-Modified: Thu, 05 Jul 2012 15:31:30 GMT
> Vary: Accept, Authorization, Cookie
> X-RateLimit-Limit: 5000
> X-RateLimit-Remaining: 4996
> X-RateLimit-Reset: 1372700873HTTP Header
$ curl -I https://api.github.com/users/octocat
> HTTP/2 200
> Date: Mon, 01 Jul 2013 17:27:06 GMT
> X-RateLimit-Limit: 60
> X-RateLimit-Remaining: 56
> X-RateLimit-Reset: 1372700873Copyright © 2021 Codeinu
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