ruby实现的一个异步文件下载HttpServer实例_Ruby

ruby实现的一个异步文件下载HttpServer实例

2020-04-16 13:26脚本之家 Ruby

这篇文章主要介绍了ruby实现的一个异步文件下载HttpServer,使用eventmachine和em-http-server实现,需要的朋友可以参考下

1.使用ruby eventmachine和em-http-server gem，完成一个简单的提供文件下载功能的HttpServer

2.使用了EM的FileStreamer来异步发送文件，发送文件时先组装了header，然后调用FileStreamer

				?

									require 'rubygems'

									require 'eventmachine'

									require 'em-http-server'

									class HTTPHandler < EM::HttpServer::Server

									 attr_accessor :filename, :filesize, :path

									 def process_http_request

									 #send file async

									 if @http_request_method.to_s =~ /GET/ && @http_request_uri.to_s.end_with?(filename)

									  send_data "HTTP/1.1 200 OK\n"

									  send_data "Server: XiaoMi\n"

									  send_data "Connection: Keep-Alive\n"

									  send_data "Keep-Alive: timeout=15\n"

									  send_data "Content-Type: application/octet-stream\n"

									  send_data "Content-Disposition: filename='#{filename}'\n"

									  send_data "Content-Length: #{filesize}\n"

									  send_data "\n"

									  streamer = EventMachine::FileStreamer.new(self, path)

									  streamer.callback {

									  # file was sent successfully

									  close_connection_after_writing

									  }

									 else

									  response = EM::DelegatedHttpResponse.new(self)

									  response.status = 200

									  response.content_type 'text/html'

									  response.content = "Package HttpServer<br>usage: wget http://host:port/#{filename}"

									  response.send_response

									 end

									 end

									end

									EM::run do

									 path = '/tmp/aaa.tar.gz'

									 EM::start_server("0.0.0.0", 8080, HTTPHandler) do |conn|

									 conn.filename = File.basename(path)

									 conn.filesize = File.size(path)

									 conn.path = path

									 end

									end