ruby实现的一个异步文件下载HttpServer实例

时间:2021-05-22

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 endendEM::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 endend

声明:本页内容来源网络,仅供用户参考;我单位不保证亦不表示资料全面及准确无误,也不保证亦不表示这些资料为最新信息,如因任何原因,本网内容或者用户因倚赖本网内容造成任何损失或损害,我单位将不会负任何法律责任。如涉及版权问题,请提交至online#300.cn邮箱联系删除。

相关文章