def request(self,
url,
first_request_time=None,
retry_counter=0,
post_json=None):
"""Performs HTTP GET/POST with credentials, returning the body as
JSON.
:param url: URL extension for request. Should begin with a slash.
:type url: string
:param first_request_time: The time of the first request (None if no
retries have occurred).
:type first_request_time: datetime.datetime
:param post_json: Parameters for POST endpoints
:type post_json: dict
:raises valhalla.utils.exceptions.ApiError: when the API returns an error.
:returns: openrouteservice response body
:rtype: dict
"""
if not first_request_time:
first_request_time = datetime.now()
elapsed = datetime.now() - first_request_time
if elapsed > self.retry_timeout:
raise exceptions.Timeout()
if retry_counter > 0:
# 0.5 * (1.5 ^ i) is an increased sleep time of 1.5x per iteration,
# starting at 0.5s when retry_counter=1. The first retry will occur
# at 1, so subtract that first.
delay_seconds = 1.5**(retry_counter - 1)
# Jitter this value by 50% and pause.
time.sleep(delay_seconds * (random.random() + 0.5))
# Define the request
params = {'access_token': self.key}
authed_url = self._generate_auth_url(
url,
params,
)
url_object = QUrl(self.base_url + authed_url)
self.url = url_object.url()
body = QJsonDocument.fromJson(json.dumps(post_json).encode())
request = QNetworkRequest(url_object)
request.setHeader(QNetworkRequest.ContentTypeHeader,
'application/json')
logger.log(
"url: {}\nParameters: {}".format(
self.url,
# final_requests_kwargs
json.dumps(post_json, indent=2)),
0)
start = time.time()
response: QgsNetworkReplyContent = self.nam.blockingPost(
request, body.toJson())
self.response_time = time.time() - start
try:
self.handle_response(response, post_json['id'])
except exceptions.OverQueryLimit:
# Let the instances know smth happened
self.overQueryLimit.emit()
return self.request(url, first_request_time, retry_counter + 1,
post_json)
response_content = json.loads(bytes(response.content()))
# Mapbox treats 400 errors with a 200 status code
if 'error' in response_content:
raise exceptions.ApiError(str(response_content['status_code']),
response_content['error'])
return response_content
