Add comprehensive Ruby proxy examples

Adds examples for 9 Ruby HTTP libraries:
- Net::HTTP (stdlib)
- Faraday
- HTTParty
- RestClient
- Typhoeus
- HTTP.rb
- Excon
- HTTPClient
- Mechanize

Includes Gemfile, test runner, and updated README with documentation.
Each example demonstrates basic proxy configuration with environment variables.

Made-with: Cursor

Author: Jacob Perkins

README.md

@@ -71,7 +71,44 @@ python python/run_tests.py requests-proxy-headers httpx-proxy-headers
 
 ## Ruby Proxy Examples
 
-* [requests_proxy.rb](ruby/requests_proxy.rb) - Ruby HTTP with proxy, from [rpolley](https://github.com/rpolley)
+**Installation:**
+
+```bash
+cd ruby
+bundle install
+```
+
+**Running Examples:**
+
+```bash
+# Required: Set your proxy URL
+export PROXY_URL='http://user:pass@proxy.example.com:8080'
+
+# Run a single example
+ruby ruby/faraday_proxy.rb
+
+# Run all examples as tests
+ruby ruby/run_tests.rb
+
+# Run specific examples
+ruby ruby/run_tests.rb faraday httparty
+```
+
+**Examples:**
+
+| Library | Example | Description |
+|---------|---------|-------------|
+| [Net::HTTP](https://ruby-doc.org/stdlib/libdoc/net/http/rdoc/Net/HTTP.html) | [net_http_proxy.rb](ruby/net_http_proxy.rb) | Ruby standard library HTTP client |
+| [Faraday](https://lostisland.github.io/faraday/) | [faraday_proxy.rb](ruby/faraday_proxy.rb) | HTTP client with middleware support |
+| [HTTParty](https://github.com/jnunemaker/httparty) | [httparty_proxy.rb](ruby/httparty_proxy.rb) | Makes HTTP fun again |
+| [RestClient](https://github.com/rest-client/rest-client) | [rest_client_proxy.rb](ruby/rest_client_proxy.rb) | Simple REST client |
+| [Typhoeus](https://typhoeus.github.io/) | [typhoeus_proxy.rb](ruby/typhoeus_proxy.rb) | Fast HTTP client (libcurl wrapper) |
+| [HTTP.rb](https://github.com/httprb/http) | [http_rb_proxy.rb](ruby/http_rb_proxy.rb) | Simple Ruby DSL for HTTP |
+| [Excon](https://github.com/excon/excon) | [excon_proxy.rb](ruby/excon_proxy.rb) | Fast, simple HTTP(S) client |
+| [HTTPClient](https://github.com/nahi/httpclient) | [httpclient_proxy.rb](ruby/httpclient_proxy.rb) | LWP-like HTTP client |
+| [Mechanize](https://github.com/sparklemotion/mechanize) | [mechanize_proxy.rb](ruby/mechanize_proxy.rb) | Web automation library |
+
+> **Note:** None of these libraries currently support sending custom headers to the proxy during HTTPS CONNECT tunneling or reading proxy response headers. See [ruby-proxy-headers](https://github.com/proxymeshai/ruby-proxy-headers) for extension modules that add this capability.
 
 ## Documentation
 

ruby/Gemfile

@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+source 'https://rubygems.org'
+
+# HTTP clients
+gem 'faraday', '~> 2.9'
+gem 'httparty', '~> 0.21'
+gem 'rest-client', '~> 2.1'
+gem 'typhoeus', '~> 1.4'
+gem 'http', '~> 5.2'
+gem 'excon', '~> 0.110'
+gem 'httpclient', '~> 2.8'
+gem 'patron', '~> 0.13'
+gem 'mechanize', '~> 2.10'
+
+# For running tests
+gem 'minitest', '~> 5.22'

ruby/excon_proxy.rb

@@ -0,0 +1,31 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Excon with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# Excon is a fast, simple HTTP(S) client. It supports proxies but does NOT
+# support sending custom headers during HTTPS CONNECT or reading proxy response headers.
+
+require 'excon'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+begin
+  response = Excon.get(test_url, proxy: proxy_url)
+
+  puts "Status: #{response.status}"
+  puts "Body: #{response.body}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/faraday_proxy.rb

@@ -0,0 +1,38 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Faraday with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# Faraday is a popular HTTP client with middleware support. It supports proxies
+# but does NOT support sending custom headers during HTTPS CONNECT or reading
+# proxy response headers.
+
+require 'faraday'
+require 'json'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+begin
+  conn = Faraday.new(url: test_url) do |f|
+    f.proxy = proxy_url
+    f.adapter Faraday.default_adapter
+  end
+
+  response = conn.get
+
+  puts "Status: #{response.status}"
+  puts "Body: #{response.body}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/http_rb_proxy.rb

@@ -0,0 +1,41 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# HTTP.rb (http gem) with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# HTTP.rb is a simple Ruby DSL for making HTTP requests. It supports proxies
+# but does NOT support sending custom headers during HTTPS CONNECT or reading
+# proxy response headers.
+
+require 'http'
+require 'uri'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+proxy_uri = URI.parse(proxy_url)
+
+proxy_options = [proxy_uri.host, proxy_uri.port]
+if proxy_uri.user
+  proxy_options << proxy_uri.user
+  proxy_options << proxy_uri.password
+end
+
+begin
+  response = HTTP.via(*proxy_options).get(test_url)
+
+  puts "Status: #{response.status}"
+  puts "Body: #{response.body}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/httparty_proxy.rb

@@ -0,0 +1,44 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# HTTParty with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# HTTParty makes HTTP fun! It supports proxies but does NOT support sending
+# custom headers during HTTPS CONNECT or reading proxy response headers.
+
+require 'httparty'
+require 'uri'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+proxy_uri = URI.parse(proxy_url)
+
+http_proxy_options = {
+  http_proxyaddr: proxy_uri.host,
+  http_proxyport: proxy_uri.port
+}
+
+if proxy_uri.user
+  http_proxy_options[:http_proxyuser] = proxy_uri.user
+  http_proxy_options[:http_proxypass] = proxy_uri.password
+end
+
+begin
+  response = HTTParty.get(test_url, **http_proxy_options)
+
+  puts "Status: #{response.code}"
+  puts "Body: #{response.body}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/httpclient_proxy.rb

@@ -0,0 +1,32 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# HTTPClient with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# HTTPClient provides LWP-like functionality. It has advanced proxy support
+# but does NOT expose custom CONNECT headers or proxy response headers.
+
+require 'httpclient'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+begin
+  client = HTTPClient.new(proxy_url)
+  response = client.get(test_url)
+
+  puts "Status: #{response.status}"
+  puts "Body: #{response.body}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/mechanize_proxy.rb

@@ -0,0 +1,38 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Mechanize with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://example.com)
+#
+# Mechanize is a web automation library. It uses Net::HTTP internally and
+# supports proxies, but does NOT support custom CONNECT headers or proxy
+# response headers.
+
+require 'mechanize'
+require 'uri'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://example.com'
+
+proxy_uri = URI.parse(proxy_url)
+
+begin
+  agent = Mechanize.new
+  agent.set_proxy(proxy_uri.host, proxy_uri.port, proxy_uri.user, proxy_uri.password)
+
+  page = agent.get(test_url)
+
+  puts "Status: #{page.code}"
+  puts "Title: #{page.title}"
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/net_http_proxy.rb

@@ -0,0 +1,45 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# Net::HTTP with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# Net::HTTP is Ruby's built-in HTTP client. It supports proxies but does NOT
+# support sending custom headers during HTTPS CONNECT or reading proxy response headers.
+
+require 'net/http'
+require 'uri'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+proxy_uri = URI.parse(proxy_url)
+target_uri = URI.parse(test_url)
+
+proxy_options = {
+  p_addr: proxy_uri.host,
+  p_port: proxy_uri.port,
+  p_user: proxy_uri.user,
+  p_pass: proxy_uri.password
+}
+
+begin
+  Net::HTTP.start(target_uri.host, target_uri.port, **proxy_options, use_ssl: target_uri.scheme == 'https') do |http|
+    request = Net::HTTP::Get.new(target_uri)
+    response = http.request(request)
+
+    puts "Status: #{response.code}"
+    puts "Body: #{response.body}"
+  end
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end

ruby/rest_client_proxy.rb

@@ -0,0 +1,38 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+# RestClient with proxy example.
+#
+# Configuration via environment variables:
+#   PROXY_URL       - Proxy URL (required), e.g., http://user:pass@proxy:8080
+#   TEST_URL        - URL to request (default: https://api.ipify.org?format=json)
+#
+# RestClient is a simple REST client. It reads proxy from environment variables
+# (HTTP_PROXY/HTTPS_PROXY) or can be set via RestClient.proxy.
+# Does NOT support custom CONNECT headers or proxy response headers.
+
+require 'rest-client'
+
+proxy_url = ENV['PROXY_URL'] || ENV['HTTPS_PROXY']
+unless proxy_url
+  warn 'Error: Set PROXY_URL environment variable'
+  exit 1
+end
+
+test_url = ENV['TEST_URL'] || 'https://api.ipify.org?format=json'
+
+# Set proxy globally
+RestClient.proxy = proxy_url
+
+begin
+  response = RestClient.get(test_url)
+
+  puts "Status: #{response.code}"
+  puts "Body: #{response.body}"
+rescue RestClient::ExceptionWithResponse => e
+  warn "HTTP Error: #{e.response.code}"
+  exit 1
+rescue StandardError => e
+  warn "Error: #{e.message}"
+  exit 1
+end