用twisted 发送请求

# coding: utf-8
# @Time    : 2022-05-18 13:01
# @Author  : AngDH
from twisted.internet import reactor
from twisted.web.client import Agent
from twisted.web.http_headers import Headers

# 相当于客户端角色
agent = Agent(reactor)

defered = agent.request(
    b'GET',
    b'http://www.baidu.com/s?wd=python',
    Headers({"User-Agent": ["python"]}),
    None)


def successCallback(response):
    print('Response received:', response.code)


defered.addCallback(successCallback)


def errorCallback(error):
    print("error:", str(error))


defered.addErrback(errorCallback)


def callbackShutdown(ignored):
    reactor.stop()


defered.addBoth(callbackShutdown)

reactor.run()

---

# coding: utf-8
# @Time    : 2022-05-18 13:01
# @Author  : AngDH
from twisted.internet import reactor
from twisted.internet.defer import succeed
from twisted.web.client import Agent
from twisted.web.http_headers import Headers
from twisted.web.iweb import IBodyProducer
from zope.interface import implementer


@implementer(IBodyProducer)
class BytesProducer(object):

    def __init__(self, body):
        self.body = body
        self.length = len(body)

    def startProducing(self, consumer):
        consumer.write(self.body)
        return succeed(None)

    def pauseProducting(self):
        pass

    def stopProducing(self):
        pass


# 相当于客户端角色
agent = Agent(reactor)

defered = agent.request(
    b'POST',
    b'http://www.baidu.com/s?wd=python',
    Headers({"User-Agent": ["python"]}),
    BytesProducer('请求体'.encode()))


def successCallback(response):
    print('Response received:', response.code)


defered.addCallback(successCallback)


def errorCallback(error):
    print("error:", str(error))


defered.addErrback(errorCallback)


def callbackShutdown(ignored):
    reactor.stop()


defered.addBoth(callbackShutdown)

reactor.run()

---

# coding: utf-8
# @Time    : 2022-05-18 13:01
# @Author  : AngDH
from twisted.internet import reactor
from twisted.internet.defer import DeferredList
from twisted.web.client import Agent
from twisted.web.http_headers import Headers

# 相当于客户端角色
agent = Agent(reactor)


def successCallback(response):
    print('Response received:', response.code)


def errorCallback(error):
    print("error:", str(error))


def callbackShutdown(ignored):
    reactor.stop()


_ = []

for url in [b"http://www.baidu.com",
            b"http://www.taobao.com",
            b"http://www.jd.com",
            b"http://www.tmall.com",
            b"http://www.tencent.com",
            b"http://www.douban.com",
            ]:
    d = agent.request(
        b'GET',
        url,
        Headers({"User-Agent": ["python"]}),
        None)
    d.addCallback(successCallback)
    d.addErrback(errorCallback)
    _.append(d)

# 统一管理 多个defered对象
dl = DeferredList(_)
dl.addBoth(callbackShutdown)

reactor.run()