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[英]Reading asynchronously from stdin and spawning processes as a result using Twisted
[英]Reading API response using Twisted
我已嘗試使用python Twisted網絡客戶端調用API后讀取響應。 我對傳遞給json結構的終結點進行了POST調用,然后它應該返回帶有消息(如果失敗)或json結構(如果成功)的狀態。
使用下面的代碼,我可以看到消息與狀態代碼一起被調用,但是我沒有看到message / json結構。
“ BeginningPrinter”從未被調用,我也不理解為什么。
輸出示例:
$ python sample.py
Response version: (b'HTTP', 1, 0)
Response code: 401 | phrase : b'UNAUTHORIZED'
Response headers:
Response length: 28
抱歉,代碼太長了,但是我想確保它包含了我在其中運行過的所有內容。
from io import BytesIO
import json
from twisted.internet import reactor
from twisted.web.client import Agent
from twisted.web.http_headers import Headers
from twisted.internet.defer import Deferred
from twisted.internet.protocol import Protocol
from twisted.web.client import FileBodyProducer
agent = Agent(reactor)
class BeginningPrinter(Protocol):
def __init__(self, finished):
self.finished = finished
self.remaining = 1024 * 10
print('begin')
def dataReceived(self, bytes):
print('bytes')
if self.remaining:
display = bytes[:self.remaining]
print('Some data received:')
print(display)
self.remaining -= len(display)
def connectionLost(self, reason):
print('Finished receiving body:', reason.getErrorMessage())
self.finished.callback(None)
TESTDATA = { "keySequence": "2019-07-14" }
jsonData = json.dumps(TESTDATA)
body = BytesIO(jsonData.encode('utf-8'))
body = FileBodyProducer(body)
headerDict = \
{
'User-Agent': ['test'],
'Content-Type': ['application/json'],
'APIGUID' : ['ForTesting']
}
header = Headers(headerDict)
d = agent.request(b'POST', b' http://127.0.0.1:5000/receiveKeyCode', header, body)
def cbRequest(response):
print(f'Response version: {response.version}')
print(f'Response code: {response.code} | phrase : {response.phrase}')
print('Response headers:')
print('Response length:', response.length)
print(pformat(list(response.headers.getAllRawHeaders())))
print(response.deliverBody)
finished = Deferred()
response.deliverBody(BeginningPrinter(finished))
return finished
d.addCallback(cbRequest)
def cbShutdown(ignored):
#reactor.stop()
pass
d.addBoth(cbShutdown)
reactor.run()
您不需要所有這些絨毛代碼,如果您已經在使用Flask,則可以編寫API並在幾行中取回值;如果您還不需要,那么pip安裝就可以了容易得多。
import json
import requests
headers = {
'content-type': 'application/json',
'APIGUID' : 'ForTesting'
}
conv = {"keySequence": "2019-07-14"}
s = json.dumps(conv)
res = requests.post("http://127.0.0.1:5000/receiveKeyCode",data=s, headers=headers)
print(res.text)
參考:請參閱此Stackoverflow鏈接
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