binding to 127.0.0.1 (instead of localhost or 0.0.0.0)

[Andy L]

Hi,

I have been a happy use or compojure{,-api} and ring for a while for my rather high level apps. All works remarkably well and I am super grateful for those libraries.

Now, I run into a specific need, as in subject to have my services being hidden behind nginx and not exposing the port outside of 127.0.0.1. Based on my research, while it is probably possible to overwrite default host via Jetty proprieties, I would like to achieve the same via lein/ring options.

So I started digging into the code, and starting from https://github.com/weavejester/lein-ring/blob/master/src/leiningen/ring/server.clj#L72 via https://github.com/weavejester/ring-server/blob/master/src/ring/server/leiningen.clj#L16 we can go all the way to https://github.com/ring-clojure/ring/blob/master/ring-jetty-adapter/src/ring/adapter/jetty.clj#L127.

It seems though, that there is not possible to pass :host option with my desired 127.0.0.1.

I have 3 questions:

 1- how lein (or rather lein-ring) inject a jetty dependency . Jetty is not shown under "lein deps :tree".

 2- what "magic" is applied in https://github.com/weavejester/lein-ring/blob/master/src/leiningen/ring/server.clj#L84

 3- what would be insights to pass :host to jetty itslef, other than explicit call like in https://github.com/ring-clojure/ring/wiki/Getting-Started

I would appreciate your help,

Best regards,

Andy

PS. I completed homework of trying to find answers for above online to no avail in spite of a few hours of research.

[James Reeves]

Have you tried adding the following option to your project.clj file:

    :ring {:adapter {:host "127.0.0.1"}}

In answer to your other questions:

1. Lein-Ring uses Leiningen's eval-in-project function to start the Ring server, which can be given additional dependencies.

2. That builds the form that eval-in-project executes.

3. Use the :adapter option to pass in whatever options you require to the Jetty adapter.

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James Reeves

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[Andy L]

James,

Thanks for the solution and explanations. I wonder how we could express `:adater` key in the documentation though - I can submit PR if needed.

Best regards,

Andy

[James Reeves]

The :adapter key is described in the README, but adding a link to the Jetty adapter options would probably be a good idea.

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