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I use rack-reverse-proxy to setup my Blogger.com to a subdomain of my Ruby on Rails app: pulpoludo.com/blog

It's work, but I have an issue with the link of Blogger which returns to blog.pulpoludo.com (where my Blogger blog is host).

I would like to rewrite this link. But I don't know-how. Can you help me?

(I have found someone who does this in PHP: https://matt-stannard.blogspot.com/2013/02/blogger-in-subdirectory-of-my-domain.html But I would like to do the same thing with Rails and a gem maybe)

Vic-D
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1 Answers1

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Indeed, you cannot use rack-reverse-proxy because it does not allow you to change the response (you need to rewrite the page you retrieve using a regular expression replacement, as in the example you link to.

Also, you should probably avoid using rack-reverse-proxy in production, as it will keep your ruby processes busy waiting for the backend responses, that might fail or be slow. And:

It is not meant for production systems

You should instead proxy from your front HTTP acceptor (nginx or other). For nginx you can see a very thorough response, using a combination of proxy_pass and sub_filter, at https://stackoverflow.com/a/32543398/384417.

edit: If it's not possible to use nginx or another reverse proxy, you can still do it in ruby.

rack-reverse-proxy supports transformers, you can build one yourself, and register it so it's run on the response. This (closed) issue will help, it is exactly what you need: https://github.com/waterlink/rack-reverse-proxy/issues/65. The caveat (as always when changing responses) is that you have to update the Content-Length response header to match the updated size of the body.

rewritten
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