1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
|
###
# This is an example of how to use Rack-Proxy in a Rails application.
#
# Setup:
# 1. rails new test_app
# 2. cd test_app
# 3. install Rack-Proxy in `Gemfile`
# a. `gem 'rack-proxy', '~> 0.7.7'`
# 4. install gem: `bundle install`
# 5. create `config/initializers/proxy.rb` adding this line `require 'rack_proxy_examples/example_service_proxy'`
# 6. run: `SERVICE_URL=http://guides.rubyonrails.org rails server`
# 7. open in browser: `http://localhost:3000/example_service`
#
###
ENV['SERVICE_URL'] ||= 'http://guides.rubyonrails.org'
class ExampleServiceProxy < Rack::Proxy
def perform_request(env)
request = Rack::Request.new(env)
# use rack proxy for anything hitting our host app at /example_service
if request.path =~ %r{^/example_service}
backend = URI(ENV['SERVICE_URL'])
# most backends required host set properly, but rack-proxy doesn't set this for you automatically
# even when a backend host is passed in via the options
env["HTTP_HOST"] = backend.host
# This is the only path that needs to be set currently on Rails 5 & greater
env['PATH_INFO'] = ENV['SERVICE_PATH'] || '/configuring.html'
# don't send your sites cookies to target service, unless it is a trusted internal service that can parse all your cookies
env['HTTP_COOKIE'] = ''
super(env)
else
@app.call(env)
end
end
end
Rails.application.config.middleware.use ExampleServiceProxy, backend: ENV['SERVICE_URL'], streaming: false
|
