下载列表 - 网/ HTTP

Question

require 'net/http' 
1.upto(99) do |novel| 
    puts "Downloading ##{novel}..." 
    Net::HTTP.start("http://www.nbc.com") do |http| 
     resp = http.get("/heroes/novels/downloads/Heroes_novel_0#{novel}.pdf") 
     open("Heroes_novel_#{novel}.pdf", "w") do |file| 
     file.write(resp.body) 
     end 
    end 
    puts "Next..." 
    puts 
end 
puts "Okay, Sneak it's done!" 

当我运行我的脚本，我得到这些错误：

C：/Ruby192/lib/ruby/1.9.1/net/http.rb： 644：在initialize': getaddrinfo: No such host is known. (SocketError) from C:/Ruby192/lib/ruby/1.9.1/net/http.rb:644:in中打开来自C：/Ruby192/lib/ruby/1.9.1/net/http.rb：644的' ：来自C：/Ruby192/lib/ruby/1.9.1/timeout的block in connect' from C:/Ruby192/lib/ruby/1.9.1/timeout.rb:44:in超时' 。 rb：89：在timeout' from C:/Ruby192/lib/ruby/1.9.1/net/http.rb:644:in连接来自C：/Ruby192/lib/ruby/1.9.1/net/http.rb：637的' ：在do_start' from C:/Ruby192/lib/ruby/1.9.1/net/http.rb:626:in从C：/Ruby192/lib/ruby/1.9.1/开始' net/http.rb：490：start' from heroes.rb:5:in块中的' 从heroes.rb：3：upto' from heroes.rb:3:in'

Answer 1

你需要合适的参数解析成start()。它需要一个主机和一个端口。最简单的方法是首先创建一个URI对象。

uri = URI('http://www.nbc.com') 
Net::HTTP.start(uri.host, uri.port) do |http| 
    #do some get requests and handle it 
end 

这相当于Net::HTTP.start("www.nbc.com", 80)