initial commit

.gitignore

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+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+
+# rspec failure tracking
+.rspec_status

.rspec

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+--format documentation
+--color
+--require spec_helper

.travis.yml

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+---
+language: ruby
+cache: bundler
+rvm:
+  - 2.7.0
+before_install: gem install bundler -v 2.1.4

Gemfile

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+source "https://rubygems.org"
+
+# Specify your gem's dependencies in roda-proxy.gemspec
+gemspec
+
+gem "rake", "~> 12.0"
+gem "rspec", "~> 3.0"

LICENSE.txt

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+The MIT License (MIT)
+
+Copyright (c) 2020 Nigel Brookes-Thomas
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

README.md

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+# Roda::Proxy
+
+Welcome to your new gem! In this directory, you'll find the files you need to be able to package up your Ruby library into a gem. Put your Ruby code in the file `lib/roda/proxy`. To experiment with that code, run `bin/console` for an interactive prompt.
+
+TODO: Delete this and the text above, and describe your gem
+
+## Installation
+
+Add this line to your application's Gemfile:
+
+```ruby
+gem 'roda-proxy'
+```
+
+And then execute:
+
+    $ bundle install
+
+Or install it yourself as:
+
+    $ gem install roda-proxy
+
+## Usage
+
+TODO: Write usage instructions here
+
+## Development
+
+After checking out the repo, run `bin/setup` to install dependencies. Then, run `rake spec` to run the tests. You can also run `bin/console` for an interactive prompt that will allow you to experiment.
+
+To install this gem onto your local machine, run `bundle exec rake install`. To release a new version, update the version number in `version.rb`, and then run `bundle exec rake release`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+
+## Contributing
+
+Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/roda-proxy.
+
+
+## License
+
+The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

Rakefile

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+require "bundler/gem_tasks"
+require "rspec/core/rake_task"
+
+RSpec::Core::RakeTask.new(:spec)
+
+task :default => :spec

bin/console

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+#!/usr/bin/env ruby
+
+require "bundler/setup"
+require "roda/proxy"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+# (If you use this, don't forget to add pry to your Gemfile!)
+# require "pry"
+# Pry.start
+
+require "irb"
+IRB.start(__FILE__)

bin/setup

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+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here

config.ru

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+require './addressing'
+
+run App

lib/roda/proxy.rb

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+require "faraday"
+require "roda/proxy/version"
+
+class Roda
+  module RodaPlugins
+    module Proxy
+    
+      def self.configure(app, opts = {})
+        app.opts[:proxy_to] = opts.fetch(:to, nil) 
+        app.opts[:proxy_path] = opts.fetch(:path, '/')
+        
+        raise 'Proxy host not set, use "plugin :proxy, to: http://example.com"' unless app.opts[:proxy_to]
+      end
+
+    
+      module RequestMethods
+        def proxy
+          #pp @_request.env
+          #pp @_request.body.read
+          method = Faraday.method(env['REQUEST_METHOD'].downcase.to_sym)
+          pp _proxy_url
+          pp _proxy_headers
+          pp roda_class
+          f_response = method.call(_proxy_url) { |req| _proxy_request(req) }
+          response.status = f_response.status
+          f_response.headers.each { |k,v| response[k] = v }
+          response.write(f_response.body)
+          halt
+        end
+        
+        private
+        
+        def _proxy_url
+          @_proxy_uri ||= URI(roda_class.opts[:proxy_to])
+            .then { |uri| uri.path = roda_class.opts[:proxy_path] ; uri }
+            .then { |uri| uri.query = env['QUERY_STRING'] ; uri }
+        end
+        
+        def _proxy_headers
+          env
+            .select { |k,_v| k.start_with? 'HTTP_'}
+            .reject { |k,_v| k == 'HTTP_HOST' }
+            .transform_keys do |k| 
+              k.sub(/^HTTP_/, '')
+                .split('_')
+                .map(&:capitalize)
+                .join('-')
+            end.merge({ 'Host' => "#{_proxy_url.host}:#{_proxy_url.port}" })
+        end
+        
+        def _proxy_request(req)
+          req.headers = _proxy_headers
+        end
+      end
+    end
+    
+    register_plugin :proxy, Proxy
+  end
+end

lib/roda/proxy/version.rb

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+class Roda
+  module Proxy
+    VERSION = "0.1.0"
+  end
+end

roda-proxy.gemspec

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+require_relative 'lib/roda/proxy/version'
+
+Gem::Specification.new do |spec|
+  spec.name          = "roda-proxy"
+  spec.version       = Roda::Proxy::VERSION
+  spec.authors       = ["Nigel Brookes-Thomas"]
+  spec.email         = ["nigel@brookes-thomas.co.uk"]
+
+  spec.summary       = 'Proxy service for Roda'
+  spec.description   = 'Roda proxy service'
+  spec.homepage      = "http://foo.bar"
+  spec.license       = "MIT"
+  spec.required_ruby_version = Gem::Requirement.new(">= 2.3.0")
+
+  spec.metadata["allowed_push_host"] = "TODO: Set to 'http://mygemserver.com'"
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "http://foo.bar"
+  spec.metadata["changelog_uri"] = "http://foo.bar"
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  spec.files         = Dir.chdir(File.expand_path('..', __FILE__)) do
+    `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) }
+  end
+  spec.bindir        = "exe"
+  spec.executables   = spec.files.grep(%r{^exe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+  
+  spec.add_dependency 'faraday', '~> 1.0'
+  spec.add_dependency 'roda', '~> 3.0'
+  
+  spec.add_development_dependency 'rerun', '~> 0.13'
+end

spec/roda/proxy_spec.rb

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+RSpec.describe Roda::Proxy do
+  it "has a version number" do
+    expect(Roda::Proxy::VERSION).not_to be nil
+  end
+
+  it "does something useful" do
+    expect(false).to eq(true)
+  end
+end

spec/spec_helper.rb

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+require "bundler/setup"
+require "roda/proxy"
+
+RSpec.configure do |config|
+  # Enable flags like --only-failures and --next-failure
+  config.example_status_persistence_file_path = ".rspec_status"
+
+  # Disable RSpec exposing methods globally on `Module` and `main`
+  config.disable_monkey_patching!
+
+  config.expect_with :rspec do |c|
+    c.syntax = :expect
+  end
+end