HMS Core: HTTP Request to Map kit via Python script

Question

I am trying to send http/https requests to the Map kit API throughout a python 3 script:

origin = {
    "lng": -4.66529,
    "lat": 54.216608
}
destination = {
    "lng": -4.66552,
    "lat": 54.2166
}
data_input = {
    "origin": origin,
    "destination": destination
}
json_input = json.dumps(data_input)

url = "https://mapapi.cloud.huawei.com/mapApi/v1/routeService/driving"   
headers = {"api-key": self.key,
           "Content-Type": "application/json"}
           
http_proxy = "http://proxy_ip:proxy_port"
https_proxy = "http://proxy_ip:proxy_port" 

proxyDict = {
    "http": http_proxy,
    "https": https_proxy
}

response = requests.get(url=url, data=json_input, headers=headers, proxies=proxyDict, verify=False)


print(response.status_code)
print(response.json()) 

but I have two main issues:

• An SSL cerification Error:

ssl.SSLCertVerificationError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1076)

• If I turn off the SSL verification, this is what I get as a print of the response:

404
{'returnCode': '5', 'returnDesc': 'NOT_FOUND'}

Any idea about these issues? especially the second one?

Answer 1

Route planning APIs in Web APIs of HUAWEI Map Kit are a set of HTTPS-based APIs for planning walking, cycling, and driving routes and calculating route distances. The APIs return planned routes in JSON format, and provide the capabilities to plan walking, cycling, and driving routes.

API Reference: Walking Route Planning

Solution:

There are two issues in your code:

1. The GET request instead of the POST request is used. The POST request must be used for route planning.
2. The required key is missing in the URL. You are advised to incorporate the key into the URL. The sample code is as follows:

origin = {
"lng": -4.66529,
"lat": 54.216608
}
destination = {
"lng": -4.66552,
"lat": 54.2166
}
data_input = {
"origin": origin,
"destination": destination
}
json_input = json.dumps(data_input)

# replace with your own api_key, this api_key is not complete
url = "https://mapapi.cloud.huawei.com/mapApi/v1/routeService/driving?key=CV7bZ85W6Y4m%2f6fGZStNnquSLeYmJukcjeD9uJgKBRcZCg25dF%2f4cWeA5CQfWxQOKe2ByIaeEkwmMIPGBW5pPu0T%2"
headers = {"Content-Type": "application/json"}

# http_proxy = "http://proxy_ip:proxy_port"
# https_proxy = "http://proxy_ip:proxy_port"
#
# proxyDict = {
# "http": http_proxy,
# "https": https_proxy
# }

response = requests.post(url=url, data=json_input, headers=headers, verify=False)

print(response.status_code)
print(response.json())

Then, the request result can be obtained successfully.

200
{'routes': [{'paths': [{'duration': 2.0, 'durationText': '1min', 'durationInTrafficText': '1min', 'durationInTraffic': 2.0, 'distance': 13.0, 'startLocation': {'lng': -4.6652902, 'lat': 54.21660782}, 'startAddress': 'German, Isle of Man, the United Kingdom', 'distanceText': '13m', 'steps': [{'duration': 1.0, 'orientation': 0, 'durationText': '1min', 'distance': 12.078, 'startLocation': {'lng': -4.6652902, 'lat': 54.21660782}, 'instruction': '', 'action': 'end', 'distanceText': '12m', 'endLocation': {'lng': -4.66544603, 'lat': 54.21666592}, 'polyline': [{'lng': -4.6652902, 'lat': 54.21660782}, {'lng': -4.66529083, 'lat': 54.21660806}, {'lng': -4.66529083, 'lat': 54.21660806}, {'lng': -4.66540472, 'lat': 54.21665}, {'lng': -4.66544603, 'lat': 54.21666592}], 'roadName': 'Poortown Road'}], 'endLocation': {'lng': -4.66544603, 'lat': 54.21666592}, 'endAddress': 'German, Isle of Man, the United Kingdom'}], 'bounds': {'southwest': {'lng': -4.66552194, 'lat': 54.21584278}, 'northeast': {'lng': -4.66216583, 'lat': 54.21669556}}}], 'returnCode': '0', 'returnDesc': 'OK'}

Update:

Here is the Result Codes.

If you receive a 401 response, the possible causes are as follows:

• The app ID in your project is different from that in AppGallery Connect.
• No signing certificate fingerprint is configured. You need to generate a signing certificate fingerprint and configure it in AppGallery Connect.
• The AppGallery Connect configuration file of your app is not configured. You need to follow instructions in Adding the AppGallery Connect Configuration File of Your App to configure it.
• The API key is not transcoded using encode.

Answer 2

For the second question, you need to do a POST instead of a GET.