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我用一种 HTTP 服务器制作了一个简单的 python 脚本：

import SocketServer

response  = b'HTTP/1.0 200 OK\r\nDate: Mon, 1 Jan 1996 01:01:01 GMT\r\n'
response += b'Content-Type: text/plain\r\nContent-Length: 14\r\n\r\n'
response += b'Hello, world!\n'

class MyTCPHandler(SocketServer.StreamRequestHandler):

    def handle(self):
        while True:
            line = self.rfile.readline().strip()
            print "{} {}:{} wrote: {}".format(self.connection, self.client_address[0], self.client_address[1], line)
            if not line:
                self.wfile.write(response)        
                print 'Sent hello world'
                #break

if __name__ == "__main__":
    HOST, PORT = "localhost", 9999

    server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler)
    server.serve_forever()

现在我启动 ab 通过 1 个连接执行 1 个请求：ab -n1 -c1 http://127.0.0.1:9999/

当我在响应后不关闭连接时，期望客户端在收到我的响应后关闭套接字，就会发生一些奇怪的事情。

Ab 一直通过相同的连接重复发送相同的请求：

~$ python2.7 ./socket_server.py
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: GET / HTTP/1.0
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Host: 127.0.0.1:9999
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: User-Agent: ApacheBench/2.3
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Accept: */*
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote:
Sent hello world
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: GET / HTTP/1.0
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Host: 127.0.0.1:9999
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: User-Agent: ApacheBench/2.3
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Accept: */*
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote:
Sent hello world
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: GET / HTTP/1.0
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Host: 127.0.0.1:9999
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: User-Agent: ApacheBench/2.3
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote: Accept: */*
<socket._socketobject object at 0x1068ca600> 127.0.0.1:64626 wrote:
Sent hello world

...并且它通过同一个套接字无限重复。

我试图从套接字读取原始数据：

import SocketServer

class MyTCPHandler2(SocketServer.BaseRequestHandler):

    def handle(self):
        while True:
            self.data = self.request.recv(1024).strip()
            print "{} wrote:".format(self.client_address[0])
            print self.data

if __name__ == "__main__":
    HOST, PORT = "localhost", 9999

    server = SocketServer.TCPServer((HOST, PORT), MyTCPHandler2)
    server.serve_forever()

Ab 甚至还没有尝试等待响应，它在同一个连接中涌入大量请求。

为什么？它是我在 HTTP 1.0 中重用的某种连接吗？无论第一个 \r\n\r\n 对之后的数据如何，我是否应该始终关闭连接？

尝试重现相同行为的正确 httperf 参数是什么？

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