cowboy_req:set_resp_cookie(3)

Name

cowboy_req:set_resp_cookie - Set a cookie

Description

set_resp_cookie(Name, Value, Req :: cowboy_req:req())
    -> set_resp_cookie(Name, Value, Req, #{})

set_resp_cookie(Name, Value, Req :: cowboy_req:req(), Opts)
    -> Req

Name  :: binary()                  %% case sensitive
Value :: iodata()                  %% case sensitive
Opts  :: cow_cookie:cookie_opts()

Set a cookie to be sent with the response.

Note that cookie names are case sensitive.

Arguments

Name: Cookie name.
Value: Cookie value.
Req: The Req object.
Opts: Cookie options.

Return value

A new Req object is returned.

The returned Req object must be used from that point onward, otherwise the cookie will not be sent in the response.

Changelog

2.0: set_resp_cookie/3 introduced as an alias to set_resp_cookie/4 with no options.
2.0: The first argument type is now binary() instead of iodata().
1.0: Function introduced.

Examples

Set a session cookie

SessionID = base64:encode(crypto:strong_rand_bytes(32)),
Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID, Req0).

Set a cookie with an expiration time

Req = cowboy_req:set_resp_cookie(<<"lang">>, <<"fr-FR">>,
    Req0, #{max_age => 3600}).

Delete a cookie

Req = cowboy_req:set_resp_cookie(<<"sessionid">>, <<>>,
    Req0, #{max_age => 0}).

Set a cookie for a specific domain and path

Req = cowboy_req:set_resp_cookie(<<"inaccount">>, <<"1">>,
    Req0, #{domain => "my.example.org", path => "/account"}).

Restrict a cookie to HTTPS

SessionID = base64:encode(crypto:strong_rand_bytes(32)),
Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID,
    Req0, #{secure => true}).

Restrict a cookie to HTTP

SessionID = base64:encode(crypto:strong_rand_bytes(32)),
Req = cowboy_req:set_resp_cookie(<<"sessionid">>, SessionID,
    Req0, #{http_only => true}).

99s

cowboy_req:set_resp_cookie(3)

Name

Description

Arguments

Return value

Changelog

Examples

See also

Cowboy 2.12 Function Reference

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