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EM-HTTP-Request

Async (EventMachine) HTTP client, with support for:

• Asynchronous HTTP API for single & parallel request execution
• Keep-Alive and HTTP pipelining support
• Auto-follow 3xx redirects with max depth
• Automatic gzip & deflate decoding
• Streaming response processing
• Streaming file uploads
• HTTP proxy and SOCKS5 support
• Basic Auth & OAuth
• Connection-level & global middleware support
• HTTP parser via http_parser.rb
• Works wherever EventMachine runs: Rubinius, JRuby, MRI

Getting started

gem install em-http-request

• Introductory screencast
• Issuing GET/POST/etc requests
• Issuing parallel requests with Multi interface
• Handling Redirects & Timeouts
• Keep-Alive and HTTP Pipelining
• Stream processing responses & uploads
• Issuing requests through HTTP & SOCKS5 proxies
• Basic Auth & OAuth
• GZIP & Deflate decoding
• EM-HTTP Middleware

Extensions

Several higher-order Ruby projects have incorporated em-http and other Ruby HTTP clients:

• EM-Synchrony - Collection of convenience classes and primitives to help untangle evented code (Ruby 1.9 + Fibers).
• Rack-Client - Use Rack API for server, test, and client side. Supports Rack middleware!
  • Example in action
• Faraday - Modular HTTP client library using middleware heavily inspired by Rack.
  • Example in action

Testing

• WebMock - Library for stubbing and setting expectations on HTTP requests in Ruby.
  • Example of using WebMock, VCR & EM-HTTP

Other libraries & applications using EM-HTTP

• VMWare CloudFoundry - The open platform-as-a-service project
• PubSubHubbub - Asynchronous PubSubHubbub ruby client
• em-net-http - Monkeypatching Net::HTTP to play ball with EventMachine
• chirpstream - EM client for Twitters Chirpstream API
• rsolr-async - An asynchronus connection adapter for RSolr
• Firering - Eventmachine powered Campfire API
• RDaneel - Ruby crawler which respects robots.txt
• em-eventsource - EventSource client for EventMachine
• and many others.. drop me a link if you want yours included!

License

(MIT License) - Copyright (c) 2011 Ilya Grigorik