nginx read response header when multiple headers have the same name

Question

I want to read the following response headers.

Response-Header:

...
set-cookie: somecookie=7ABFBB3446C856779B59A837DE3946F7DB; Path=/; Secure;
set-cookie: wantedcookie=12414ASDFAFADFW2342342; Path=/; Secure;
...

The variable $sent_http_set_cookie contains the first header

$sent_http_set_cookie = somecookie=7ABFBB3446C856779B59A837DE3946F7DB; Path=/; Secure;

--

How to read the second header in order to get the value of the wantedcookie?

The nginx configuration looks like this:

location /api {
  add_header X-Debug "${sent_http_set_cookie}";
}

HuDahai · Accepted Answer · 2020-06-23 04:00:29Z

1

I have the same problem with you. I solved it by using the following code

local headers = ngx.resp.get_headers()
ngx.log(ngx.ERR, " set-cookie type is ", type(headers['set-cookie']))
ngx.log(ngx.ERR, "cookie headers are", require("cjson").encode(headers["set-cookie"]))

if there are multiple headers with the same, then headers[name] is a table.

ps: the code block show be placed in header_filter phase.

answered Jun 23, 2020 at 4:00

HuDahai

474 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

vadru Over a year ago

This is lua code as I see. Please state it in your answer.

Collectives™ on Stack Overflow

nginx read response header when multiple headers have the same name

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related