python - 脚本无法发出 POST 请求

Question

我有以下脚本:

from twisted.internet import reactor
import time,hashlib,urllib2,json,treq
from urllib import urlencode

#This is used to print out the Password that is found. This is called at the
# end of each loop. And checks if response code == 200.
def done(response):
    if response.code == 200:
        sys.stdout.write( Password + "FOUND" )
#The Password is basically a 4 digit number, the line under starts with number 0.
PasswordStart = 0
#This is an array to make sure that the script does not do double requests to the host.
executed = []
#Loop which runs the URL request 10000 times
while PasswordStart<9999:
    #Checks if PasswordStart is in array
    if PasswordStart not in executed and PasswordStart<9999:
        #Since PasswordStart is not in array, it will add it to the array
        #and then run the rest of the code.
        executed.append(PasswordStart)
        #Makes a variable of the time/date, used later in headers
        Timing = time.strftime("%Y-%m-%dT%H:%M:%S.00+00:00")
        #Just four variables for registration date, which is used later in
        # the datas_p variable
        YearRegD = time.strftime("%Y")
        DateRegD = time.strftime("-%m-%d")
        YearRegD2 = str((int(YearRegD)-1))
        RegD = YearRegD2 + DateRegD
        #UserAgent for the request
        UserAgent = "Samsung Galaxy S8 - 7.0.0"
        #Username for datas_p data later
        UName = "JamesRicky"
        #Makes the PasswordStart into 4 digits: 0 becomes 0000, 40 becomes 0040.
        Password = str(PasswordStart).zfill(4)
        #These two hashes my string and makes a variable with the hash,
        # which is later used in the headers part of request
        HASH = hashlib.md5()
        HASH.update(time.strftime("%Y-%m-%dT%H:%M:%S.00+00:00")+UName+Password)

        #Now the fun part, defines url for the post request
        url = "http://example.com/user"
        #JSON data for the POST request
        datas_p = {'Username': UName, 'Password': Password, 'RegDate': RegD}
        #URLencodes JSON - Not sure if this is needed or not
        datas = urlencode(datas_p)

        #The headers for the POST request
        headers = ({
                'User-Agent': [UserAgent],
                'Date': [Timing],
                'Secret-Key': [HASH.hexdigest()],
                'Content-type': ['application/json'],
                'Accept-encoding': ['gzip'],
                'Accept': ['*/*'],

        })

        #Sends the treq.post request using the information from above (url, data, headers)
        d = treq.post(url, data=datas, headers=headers)
        #Adds call back in done def above.
        d.addCallback(done)
        #Adds up on the PasswordStart, so it tries another password for the
        next request in the loop.
        PasswordStart+=1

reactor.run()

当我运行它时，它会遍历循环，但发出 0 个请求(无论我放置了哪个主机)。这意味着 treq.post 请求有问题。

我在这里做错了什么？

编辑:这是treq的文档:https://treq.readthedocs.io/en/latest/它应该很像 requests 并且基于twisted。

编辑2:以下是treq如何发出请求的示例代码:

http://nullege.com/codes/show/src%40b%40t%40btcx-HEAD%40btcx%40btce.py/51/treq.post/python

在阅读上面的代码时，我没有找到我做错了什么。

Answer 1

首先，twisted 是一个服务器应用程序，因此必须进行日志记录才能了解发生了什么:

twisted.python.log.startLogging(sys.stdout)

现在，Password 未在 done() 执行的上下文中定义(或者可能是，但一旦 Deferred 正在执行)。您需要按照 How to pass extra arguments to callback register functions with twisted python api? 显式地将额外数据传递给回调。 :

def done(response,Password):
    if response.code == 200:
        sys.stdout.write( Password + "FOUND" )

<...>
d.addCallback(done,Password)

(请注意，对于变量，PEP8 recommends lowercase_with_underscores 命名约定，CamelCase 用于类型名称。我只是偏离它以符合您现有的代码。)

最后，没有 reactor.stop()，因此您的代码将无限期地运行。停止的一种方法是使用 twisted.internet.task.react 而不是 reactor 和 defer.gatherResults 作为将调用所有其他的，完成后将发出 react 堆停止的信号，如stop a twisted reactor after a gatherResults has finished :

def main():
    #checkPassword() returns a Deferred for trying the corresponding password
    calls = [checkPassword(password) for password in ('%04d'%i for i in range(10000))]
    d=defer.gatherResults(calls)
    return d

twisted.internet.task.react(main,[])