= cowboy_req:set_resp_headers(3)

== Name

cowboy_req:set_resp_headers - Set several response headers

== Description

[source,erlang]
----
set_resp_headers(Headers, Req) -> cowboy_req:req()

Headers :: cowboy:http_headers()
Req     :: cowboy_req:req()
----

Add all given headers to the response headers.
If a given header key already exists in the currently set
response-header map the given value will overwrite the old.

== Arguments

Headers::

A map with keys and values as binary strings.
Key values should be lowercase to function properly.

Req::

The Req object.

== Return value

A request object updated with the given response headers.

== Changelog

* *2.0*: Function introduced.

== Examples

.Get all response headers
[source,erlang]
----
Req1 = cowboy_req:set_resp_headers(#{<<"x-header-test">> => <<"1">>}, Req0).
----

== See also

link:man:cowboy_req(3)[cowboy_req(3)],
link:man:cowboy_req:resp_headers(3)[cowboy_req:resp_headers(3)]