http服务器异步响应,具有异步响应的Twisted http服务器，其中请求必须等待数据变为可用或...

我不是女神ヾ 2022-09-03 06:22 174阅读 0赞

我正在尝试编写一个简单的http服务器，用于处理在数据结构中查找响应或超时的异步请求：请求到达

While time&lt；timeout检查responseCollector的响应(使用requestId作为键)

如果有响应，请返回

如果超时，则返回超时消息

我是twisted的新手，我想知道异步响应的最佳方式是什么。我看了看some twisted Deferred docs和callLater但是我不清楚我到底应该做什么。现在，我运行一个与deferToThread一起使用的阻塞方法，并等待超时时间过去。我得到延迟方法的字符串不可调用错误：Unhandled error in Deferred:

Traceback (most recent call last):

File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/threading.py", line 497, in \_\_bootstrap

self.\_\_bootstrap\_inner()

File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/threading.py", line 522, in \_\_bootstrap\_inner

self.run()

File "/System/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/threading.py", line 477, in run

self.\_\_target(\*self.\_\_args, \*\*self.\_\_kwargs)

\--- ---

File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/python/threadpool.py", line 210, in \_worker

result = context.call(ctx, function, \*args, \*\*kwargs)

File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/python/context.py", line 59, in callWithContext

return self.currentContext().callWithContext(ctx, func, \*args, \*\*kw)

File "/System/Library/Frameworks/Python.framework/Versions/2.6/Extras/lib/python/twisted/python/context.py", line 37, in callWithContext

return func(\*args,\*\*kw)

exceptions.TypeError: 'str' object is not callable

这是我的代码：from twisted.web import server, resource

from twisted.internet import reactor, threads

import json

import time

connectedClients = \{\}

responseCollector = \{\}

\# add fake data to the collector

class FakeData(resource.Resource):

isLeaf = True

def render\_GET(self, request):

request.setHeader("content-type", "application/json")

if 'rid' in request.args and 'data' in request.args:

rid = request.args\['rid'\]\[0\]

data = request.args\['data'\]\[0\]

responseCollector\[str(rid)\] = data

return json.dumps(responseCollector)

return "\{\}"

class RequestHandler(resource.Resource):

isLeaf = True

def render\_GET(self, request):

\#request.setHeader("content-type", "application/json")

if not ('rid' in request.args and and 'json' in request.args):

return '\{"success":"false","response":"invalid request"\}'

rid = request.args\['rid'\]\[0\]

json = request.args\['id'\]\[0\]

\# TODO: Wait for data to show up in the responseCollector with same rid

\# as our request without blocking other requests OR timeout

d = threads.deferToThread(self.blockingMethod(rid))

d.addCallback(self.ret)

d.addErrback(self.err)

def blockingMethod(self,rid):

timeout = 5.0

timeElapsed = 0.0

while timeElapsed

if rid in responseCollector:

return responseCollector\[rid\]

else:

timeElapsed+=0.01

time.sleep(0.01)

return "timeout"

def ret(self, hdata):

return hdata

def err(self, failure):

return failure

reactor.listenTCP(8080, server.Site(RequestHandler()))

reactor.listenTCP(9080, server.Site(FakeData()))

reactor.run()

发出请求(当前不返回任何有用的内容)：http://localhost:8080/?rid=1234&json=\{%22foo%22:%22bar%22\}

添加一些假数据以用于请求：http://localhost:9080/?rid=1234&data=foo

使用工作版本更新from twisted.web import server, resource

from twisted.internet import reactor, threads

import json

import time

connectedClients = \{\}

responseCollector = \{\}

\# add fake data to the collector

class FakeData(resource.Resource):

isLeaf = True

def render\_GET(self, request):

request.setHeader("content-type", "application/json")

if 'rid' in request.args and 'data' in request.args:

rid = request.args\['rid'\]\[0\]

data = request.args\['data'\]\[0\]

responseCollector\[str(rid)\] = data

return json.dumps(responseCollector)

return "\{\}"

class RequestHandler(resource.Resource):

isLeaf = True

def render\_GET(self, request):

if not ('rid' in request.args and 'data' in request.args):

return '\{"success":"false","response":"invalid request"\}'

rid = request.args\['rid'\]\[0\]

json = request.args\['data'\]\[0\]

\# TODO: Wait for data to show up in the responseCollector with same rid

\# as our request without blocking other requests OR timeout

d = threads.deferToThread(self.blockingMethod,rid)

d.addCallback(self.ret, request)

d.addErrback(self.err)

return server.NOT\_DONE\_YET

def blockingMethod(self,rid):

timeout = 5.0

timeElapsed = 0.0

while timeElapsed

if rid in responseCollector:

return responseCollector\[rid\]

else:

timeElapsed+=0.01

time.sleep(0.01)

return "timeout"

def ret(self, result, request):

request.write(result)

request.finish()

def err(self, failure):

return failure

reactor.listenTCP(8080, server.Site(RequestHandler()))

reactor.listenTCP(9080, server.Site(FakeData()))

reactor.run()

http服务器异步响应,具有异步响应的Twisted http服务器，其中请求必须等待数据变为可用或...

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