我很难在标准IP摄像机中订阅OnVif Pullpoint服务。
我正在使用的SOAP客户端是Zeep https://python-zeep.readthedocs.io/en/master/index.html
Zeep似乎构造了错误的xml数据,但是我可能是错的(由于我对SOAP的了解有限)。让我们来看一个例子:
from zeep.client import Client, CachingClient, Settings
from zeep.wsse.username import UsernameToken
import zeep.helpers
import logging.config
# # Put Zeep into verbose mode
logging.config.dictConfig({
'version': 1,
'formatters': {
'verbose': {
'format': '%(name)s: %(message)s'
}
},
'handlers': {
'console': {
'level': 'DEBUG',
'class': 'logging.StreamHandler',
'formatter': 'verbose',
},
},
'loggers': {
'zeep.transports': {
'level': 'DEBUG',
'propagate': True,
'handlers': ['console'],
},
}
})
ip="192.168.0.134"; user="admin"; passwd="123456"; port=80 # My home cam 1. Now you know its username and password. :)
settings = Settings()
settings.strict = False
settings.xml_huge_tree = True
# # WSDL File
url = "https://www.onvif.org/ver10/events/wsdl/event.wsdl"
# # *** Events Service ***
xaddr = "http://"+ip+"/onvif/events_service"
print("creating a soap client with url = ", url)
zeep_client_events = CachingClient(wsdl=url, wsse=UsernameToken(user, passwd, use_digest=True), settings=settings)
print("soap client created")
print("binding to service")
ws_client_events = zeep_client_events.create_service("{http://www.onvif.org/ver10/events/wsdl}EventBinding", xaddr)
print("service OK")
# # *** PullPoint Service ***
xaddr = "http://"+ip+"/onvif/events_service"
print("creating a soap client with url = ", url)
zeep_client_pp = CachingClient(wsdl=url, wsse=UsernameToken(user, passwd, use_digest=True), settings=settings)
print("soap client created")
print("binding to service")
ws_client_pp = zeep_client_pp.create_service("{http://www.onvif.org/ver10/events/wsdl}PullPointSubscriptionBinding", xaddr)
print("service bound")
res = ws_client_events.CreatePullPointSubscription()
# # could see the namespaces like this:
# zeep_client_pp.namespaces
# # could create PullMessages' parameters like this:
# pm = zeep_client_pp.get_element("ns7:PullMessages")()
# So, this call never works
ws_client_pp.PullMessages(MessageLimit=1, Timeout="PT1S")
根据相机的不同,这总是导致“远端封闭连接无响应”,否则服务器将发送一条消息,指出该值无效。
将Zeep置于详细模式并检查SOAP消息正文(也已通过Wireshark确认)时,它看起来像这样:
<soap-env:Body>
<ns0:PullMessages xmlns:ns0="http://www.onvif.org/ver10/events/wsdl">
<ns0:Timeout>P%P</ns0:Timeout>
<ns0:MessageLimit>1</ns0:MessageLimit>
</ns0:PullMessages>
</soap-env:Body>
因此,似乎字符串“ PT1S”没有进入消息正文,但是仍然存在“ P%P”代替!
如何说服Zeep将正确的时间插入到位?
P。 S。而且,请不要告诉我使用“ python-onvif-zeep”。当然,我首先这样做,然后最终遇到了这个问题(pullpoint服务的“ python-onvif-zeep”示例不起作用)
答案 0 :(得分:0)
必须属于 isodate.Duration 类。这样可以解决问题:
import isodate
Timeout = isodate.Duration(seconds=10)
答案 1 :(得分:0)
请注意,events.wsdl中使用的日期时间似乎是XML类型。在Python中,datedel从datetime开始支持。
import datetime
timeout = datetime.timedelta(seconds=100)
ws_client_pp.PullMessages(MessageLimit=1, Timeout=timeout)
以上应用于zeep,生成正确的请求。 100 s是PT1M40S。
我无论如何都无法继续使用相机,但现在的时长已正确设置。