Public Member Functions
def	__init__ (self, url=None, url_data=None, body=None, response_stream=None, timeout=60)

def	send (self)

Private Attributes
	_r

	_response

	_url

Detailed Description

Definition at line 21 of file url_query.py.

Constructor & Destructor Documentation

◆ init()

def url_query.url_query.__init__	(	self,
		url = `None`,
		url_data = `None`,
		body = `None`,
		response_stream = `None`,
		timeout = `60`
	)

Definition at line 23 of file url_query.py.

     def __init__(self, url=None, url_data=None, body=None, response_stream=None, timeout=60):
         if not(url):
             return None
         self._url = url
         self._r = pycurl.Curl()
  
         # set options for the request - of note is the fact that we do not verify the peer or the host - because
         # CERN certificates are self-signed, and we only need the encryption from HTTPS, not the certificate checks.
  
         self._r.setopt(self._r.CONNECTTIMEOUT, timeout)
         user_agent = "User-Agent: ConditionWebServices/1.0 python/%d.%d.%d PycURL/%s" % (sys.version_info[ :3 ] + (pycurl.version_info()[1],))
         self._r.setopt(self._r.USERAGENT, user_agent)
         # we don't need to verify who signed the certificate or who the host is
         self._r.setopt(self._r.SSL_VERIFYPEER, 0)
         self._r.setopt(self._r.SSL_VERIFYHOST, 0)
         self._response = StringIO()
  
         if body:
             if isinstance(body, dict):
                 body = urlencode(body)
             elif isinstance(body, list):
                 body = json.dumps(body)
  
             self._r.setopt(self._r.POSTFIELDS, body)
  
         if url_data:
             if isinstance(url_data, dict):
                 url_data = urlencode(url_data)
             else:
                 exit("URL data '%s' for request to URL '%s' was not valid - should be a dictionary." % (str(url_data), url))
  
         # set the URL with url parameters if they were given
         self._r.setopt(self._r.URL, url + (("?%s" % url_data) if url_data else ""))
  
         if response_stream and not isinstance(response_stream, StringIO):
             response_stream = StringIO()
             # copy reference to instance variable
             self._response = response_stream
         elif not(response_stream):
             self._response = StringIO()
  
         self._r.setopt(self._r.WRITEFUNCTION, self._response.write)
  

Member Function Documentation

◆ send()

def url_query.url_query.send ( self )

Definition at line 66 of file url_query.py.

     def send(self):
         failed = True
         max_retries = 5
         attempt = 0
         # retry while we're within the limit for the number of retries
         while failed and attempt < max_retries:
             try:
                 self._r.perform()
                 failed = False
                 self._r.close()
                 return self._response.getvalue()
             except Exception as e:
                 failed = True
                 attempt += 1
                 # this catches exceptions that occur with the actual http request
                 # not exceptions sent back from server side
                 if isinstance(e, pycurl.error) and e[0] in [7, 52]:
                     # wait two seconds to retry
                     print("Request failed - waiting 3 seconds to retry.")
                     sleep(3)
                     # do nothing for now
                     pass
                 else:
                     print("Unforesoon error occurred when sending data to server.")
                     traceback.print_exc()
         if attempt == max_retries:
             raise NoMoreRetriesException(max_retries)