如何使用的urllib2加载URL时设置TCP_NODELAY标志？(How to set TCP_

我使用的urllib2加载网页，我的代码是：

httpRequest = urllib2.Request("http:/www....com")
pageContent = urllib2.urlopen(httpRequest)
pageContent.readline()

我怎样才能插座属性保持设置TCP_NODELAY ？

在正常的插座，我将使用功能：

socket.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)

Answer 1:

如果您需要访问这些低级别属性使用的插座上，你就必须重载一些对象。

首先，你需要创建的子类的HttpHandler ，在标准库做：

class HTTPHandler(AbstractHTTPHandler):

    def http_open(self, req):
        return self.do_open(httplib.HTTPConnection, req)

    http_request = AbstractHTTPHandler.do_request_

正如你所看到的，它使用了HTTPConnection打开连接......你必须覆盖它太;）升级connect()方法。

像这样的东西应该是一个良好的开端：

class LowLevelHTTPConnection(httplib.HTTPConnection):

    def connect(self):
        httplib.HTTPConnection.connect(self)
        self.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)


class LowLevelHTTPHandler(HTTPHandler):

    def http_open(self, req):
        return self.do_open(LowLevelHTTPConnection, req)

urllib2的是足够聪明，让你继承了一些处理，然后用它的urllib2.build_opener针对此提出：

urllib2.install_opener(urllib2.build_opener(LowLevelHTTPHandler)) # tell urllib2 to use your HTTPHandler in replacement of the standard HTTPHandler
httpRequest = urllib2.Request("http:/www....com")
pageContent = urllib2.urlopen(httpRequest)
pageContent.readline()

Answer 2:

如果有需求，类似乎是在request.packages.urllib3 ; 有2个班，HttpConnection的，和HTTPSConnection。他们应在模块顶层到位monkeypatchable：

from requests.packages.urllib3 import connectionpool

_HTTPConnection = connectionpool.HTTPConnection
_HTTPSConnection = connectionpool.HTTPSConnection

class HTTPConnection(_HTTPConnection):
    def connect(self):
        _HTTPConnection.connect(self)
        self.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)

class HTTPSConnection(_HTTPSConnection):
    def connect(self):
        _HTTPSConnection.connect(self)
        self.sock.setsockopt(socket.IPPROTO_TCP, socket.TCP_NODELAY, 1)

connectionpool.HTTPConnection = HTTPConnection
connectionpool.HTTPSConnection = HTTPSConnection