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
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
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 |