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John
Asked: 2019-12-25 05:04:37 +0800 CST

Nginx: how to set or pass headers in redirect to localhost?

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I want to pass some headers that are retrieved from one location and pass them via a redirect to the user's localhost. However, I cannot see the headers. Is this possible and if so, how do I do it?

Here is a location where we add a header then call rewrite:

location = /proxy-localhost/9000 {
    // in due course, I will pass other headers, but for now let's just pass this
    add_header 'Dummy' "dummy_val";
    rewrite ^ http://localhost:9000;
}

However, when I run a simple server using ncat on localhost, I don't see a header called Dummy in the output when I trigger the /proxy-localhost location block via a curl request (I can see the rewrite being actioned in the logs, so I know the block is being triggered):

$ for i in {1..3}; do echo -e "HTTP/1.1 200 OK\n\nOK" | ncat -vv -l 9000; done
nginx

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