Ruby implementation of an asynchronous file download Httpserver Instance _ruby topic

1. Use Ruby Eventmachine and Em-http-server gem to complete a simple httpserver to provide file download functionality

2. Using the Filestreamer of EM to send the file asynchronously, the header is assembled before the file is sent, and then the Filestreamer

Require ' rubygems ' require ' eventmachine ' Require ' Em-http-server ' class HttpHandler < Em::httpserver::server attr_a Ccessor:filename,: FileSize,:p ath def process_http_request #send file async if @http_request_method. to_s =~/get/&A mp;& @http_request_uri. To_s.end_with? (filename) send_data "http/1.1 ok\n" Send_data "server:xiaomi\n" Send_data "connection:keep-alive\n" Send_da Ta "keep-alive:timeout=15\n" Send_data "content-type:application/octet-stream\n" Send_data "Content-disposition:fil Ename= ' #{filename} ' \ n ' send_data ' content-length: #{filesize}\n ' send_data ' \ n ' streamer = Eventmachine::filestream Er.new (self, path) streamer.callback {# file was sent successfully close_connection_after_writing} else RESPO  NSE = EM::D elegatedhttpresponse.new (self) response.status = Response.content_type ' text/html ' response.content = "Package httpserver<br>usage:wget Http://host:port/#{filename}" Response.send_response end enD End Em::run does 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