我有一个多线程python程序,它会不断打开与本地URL( http://testing.com/sendMessages_mock.php )的连接,我已经安装了WAMP并在本地安装了sendMessages_mock.php文件进行测试目的。有时,我得到" [Errno 10061]无法建立连接,因为目标计算机主动拒绝它"
每个线程都会调用此函数。每一秒,就会有数百个线程调用此函数。仅针对少数线程调用获取此异常。有什么想法吗?
def sendMessage(body):
try:
request = Request(url="http://testing.com/sendMessages_mock.php", data=json.dumps(body))
request.add_header('Authorization', 'key=' + CONST.API_KEY)
request.add_header('Content-Type', 'application/json')
response = urlopen(request)
responseData = response.read().decode('utf-8')
except Exception as exceptionErr:
print("Oops! " + str(traceback.format_exc()))
答案 0 :(得分:1)
如果每秒过多的调用是导致WAMP拒绝请求的问题,并且您想在Python端解决此问题,则可以编写限制器类来处理sendMessage执行并限制调用次数。
请注意,这是我对别人问题的第一个回答,所以这可能是绝对错误的。请有合理的怀疑态度。
#python 2.7
import threading
class Throttle(object):
def __init__(self, call_limit, interval):
self.call_limit = call_limit
self.interval = interval
self.cleaner = None
self.buffer = threading.Semaphore(call_limit)
self.calls_in_buffer = 0
def call(self, function, *args):
self.buffer.acquire()
self.calls_in_buffer += 1
try:
return function(*args)
except:
raise
finally:
if self.cleaner == None:
self._init_cleaner()
def _drain(self):
for i in range(self.call_limit):
self.calls_in_buffer -= 1
self.buffer.release()
self.cleaner = None
def _init_cleaner(self):
self.cleaner = threading.Timer(self.interval, self._drain)
self.cleaner.daemon = True
self.cleaner.start()
通过这样的类进行调用可以有效地限制请求,因此服务器将能够处理它们。