https://github.com/ayanko/libevent

C extension to libevent library
https://github.com/ayanko/libevent

Last synced: 3 days ago
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C extension to libevent library

• Host: GitHub
• URL: https://github.com/ayanko/libevent
• Owner: ayanko
• Created: 2011-11-18T18:46:54.000Z (almost 13 years ago)
• Default Branch: master
• Last Pushed: 2012-05-11T12:29:07.000Z (over 12 years ago)
• Last Synced: 2024-09-24T11:19:09.205Z (about 2 months ago)
• Language: C
• Homepage:
• Size: 533 KB
• Stars: 34
• Watchers: 6
• Forks: 5
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
## Libevent

C extension to [libevent](http://libevent.org/) library.

## Description

The nice feature of libevent is it already contains build in HTTP server (evhttp).

Currently libevent extension implements mostly http server.

## Dependencies

* libevent v2

## Documentation

Please read [libevent rubydoc](http://rubydoc.info/github/ayanko/libevent/frames)

## Installation

    gem install libevent

## Using Libevent HTTP server

Check `samples` directory

### From scratch

Simple server

    require "libevent" 

    # create event base

    base = Libevent::Base.new

    # create http server instance

    http = Libevent::Http.new(base)

    # bind socket

    http.bind_socket("0.0.0.0", 15015)

    # set handler

    http.handler do |request|

      request.send_reply(200, {}, ["Hello World\n"])

    end

    # catch SIGINT

    base.trap_signal("INT") { base.exit_loop }

 

    # start libevent loop

    base.dispatch

Check with curl

    $ curl -v http://localhost:15015

    > GET / HTTP/1.1

    > User-Agent: curl/7.22.0 (x86_64-unknown-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.0e zlib/1.2.5 libssh2/1.3.0

    > Host: localhost:15015

    > Accept: */*

    > 

    < HTTP/1.1 200 OK

    < Transfer-Encoding: chunked

    < Date: Fri, 18 Nov 2011 19:09:04 GMT

    < Content-Type: text/html; charset=ISO-8859-1

    < 

    Hello World

### Server with virtual hosts

    require "libevent"

    Libevent::Builder.new do

      server "0.0.0.0", 3000 do |http|

	http.handler do |request|

	  case request.get_uri_path

	  when '/hello'

	    request.send_reply 200, { 'Content->Type' => 'text/plain'},  [ "Hello World" ]

	  when '/api'

	    request.send_reply 200, { 'Content->Type' => 'application/json'},  [ "{\"version\":\"1.0\"}" ]

	  else

	    request.send_error 404, "Nothing Found"

	  end

	end

	http.vhost "blog.local" do |host|

	  host.handler do |request|

	    request.send_reply 200, {}, ["It's blog"]

	  end

	end

	http.vhost "wiki.local" do |host|

	  host.handler do |request|

	    request.send_reply 200, {}, ["It's wiki"]

	  end

	end

	http.vhost "*.local" do |host|

	  host.handler do |request|

	    request.send_error 404, "Please use blog.local or wiki.local"

	  end

	end

      end

      server "0.0.0.0", 3001 do |http|

	http.handler do |request|

	  request.send_reply 200, { 'Content->Type' => 'text/plain'},  [ "Hello World 3001" ]

	end

      end

      signal("INT") do

	base.exit_loop

      end

      signal("HUP") do

	Kernel.puts "HUP received ..."

      end

      dispatch

    end

### Serve Rails application

Add to `Gemfile`

    gem "libevent", :require => false

Update gems

    $ bundle install

Run application

    $ script/rails s Libevent

Or via rackup

    $ bundle exec rackup -s Libevent -p 3000

### Serve Rack application

Check rack handler `rack/handler/libevent.rb`

## References

* [libevent2 documentation](http://www.wangafu.net/~nickm/libevent-2.0/doxygen/html/index.html)

* [libevent ruby binding documentation](http://rubydoc.info/github/ayanko/libevent/master/file/README.md)