为什么手动 socket 连接 web 服务器比浏览器慢了这么多?? - V2EX
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menc
V2EX    浏览器

为什么手动 socket 连接 web 服务器比浏览器慢了这么多??

  •  1
     
  •   menc 2015-09-01 10:30:38 +08:00 4045 次点击
    这是一个创建于 3764 天前的主题,其中的信息可能已经有所发展或是发生改变。

    我的网速还可以,用浏览器打开测试网页在一两秒全部加载完毕。
    但是我用 socket 转发浏览器的请求,从 socket.sendall ()结束开始算起,到 recv 完毕,花费的时间却数十倍于浏览器:

    using 60.132000s get receive from: cdn.v2ex.com
    using 46.560000s get receive from: zone.wooyun.org
    using 30.46000s get receive from: sjs.sinajs.cnbr> using 30.76000s get receive from: i.sso.sina.com.cn

    请问这是怎么回事?我的 socket 写的有问题还是浏览器有什么特别的技巧?

    相关代码在下面,略去无关代码:

    def recv_basic (the_socket ): total_data='' while True: data = the_socket.recv (2048 ) if not data: break total_data+=data return total_data # ...send codes... t1 = datetime.datetime.now () data2reply = recv_basic (remote ) t2 = datetime.datetime.now () print 'using ', str ((t2 - t1 ).seconds )+'.'+str ((t2-t1 ).microseconds ), 's get receive from:' , remoteAddr 
    5 条回复    2015-09-01 12:25:02 +08:00
    hyq
        1
    hyq  
       2015-09-01 11:16:08 +08:00
    有些时候,需要根据服务器返回的 Content-Length ,来读取特定的字节数。服务器不一定会关闭连接返回 eof 的。
    hyq
        2
    hyq  
       2015-09-01 11:17:13 +08:00   1
    你那样的读取方式,只能等到服务器的连接超时时间,才能返回
    Cloudee
        3
    Cloudee  
       2015-09-01 11:24:16 +08:00   1
    或者你也可以在请求包头里面加上 Connection: close ,这样服务端传输完之后就会关闭连接了
    menc
        4
    menc  
    OP
       2015-09-01 11:31:52 +08:00
    @Cloudee 那 https 怎么办?没法在头中加东西啊
    est
        5
    est  
       2015-09-01 12:25:02 +08:00   1
    @menc https 怎么就没法在头里加东西了?
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