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I am running Stellar core and Horizon behind an Nginx reverse proxy and encountering issues with the _link.href output by Horizon. The SSL is terminated at nginx, with the connection to Horizon non-SSL.

The Horizon API is accessed via https://xxx-test.example.com but the output by Horizon _links is always of the form http://xxx-test.example.com/accounts (ie non HTTPS).

I cant seem to find a definitive resource in the docs for how to modify the output to be https (or even change the base url) for all links. I see from the public Stellar testnet, that all of the _links.href values are https, so I know it is possible but just unsure how.

Is the output URL protocol dynamic based on the incoming protocol? Is there a config I can use to override?

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You have to set the X-Forwarded-Proto: https header in your proxy.

how to nginx

or haproxy:

backend ...    
    http-request set-header X-Forwarded-Proto https
  • This appears to fix the issue for me. To confirm: there is no config or override I can set with Horizon in order to set the base URL and protocol and avoid it being dynamic? – Chris I Mar 15 at 13:19
  • I remember how I wanted to use a different base URL with a sub path, but as far as I know the URL is constructed and not configurable at all. – sui Mar 15 at 13:28

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