How can I retrieve objects from back4app using python 3?

Question

I am trying to interact with a database stored in back4app using python. After sending my GET request, I get "{'message': 'Not Found', 'error': {}}". My python code is as follows:

import json, http.client, urllib.parse
# create a connection to the server
url = "parseapi.back4app.com"
connection = http.client.HTTPSConnection(url)
connection.connect()

# define parameter for GET request
params = urllib.parse.urlencode({"where":json.dumps({"Name": "Dru Love"})})

# perform GET request
connection.request('GET', '/parse/classes/PGA?%s' % params, '', {
       "X-Parse-Application-Id": "app_id",
       "X-Parse-REST-API-Key": "api_key"
     })

# store response in result variable
result = json.loads(connection.getresponse().read())
connection.close()
print(result)

Response:

{'message': 'Not Found', 'error': {}}

Without *reading the docs* (pointer) I'm wondering about the `$`. It doesn't look right. — Klaus D., Mar 30 '18 at 15:30
Before the rest api key? It's in the rest api docs provided by back4app. I tried removing it and nothing seems to change, same result. — SPFort, Mar 30 '18 at 15:37

score 0 · Answer 1 · answered Mar 30 '18 at 15:37

0

I'm really recommend to use requests package. The package is very nice, for HTTP calls.

Little example for the your case.

# Your payloads
params = {
    "X-Parse-Application-Id": "app-id",
    "X-Parse-REST-API-Key": "YOUR_IP_KEY"
}


url = 'https://parseapi.back4app.com/parse/classes/Congressmen'


# GET method, with URI parameters
response = requests.get(url, params=params)

print(response.url)

# Get json data from a response.
print(response.json())

answered Mar 30 '18 at 15:37

I still have the same problem. The response I get is: {'error': 'unauthorized'} – SPFort Mar 30 '18 at 15:53
`{'error': 'unauthorized'} ` meant that you provided an bad credentials, check your `app-id` or `api_key`. – Mar 30 '18 at 16:18
My app-id and Rest-Api-key are definitely correct, I have quadruple checked them at this point. The thing I am most unsure about is honestly the url I am using. Am I using the correct url? If not, where do I find the correct one? – SPFort Mar 30 '18 at 16:38
I don't know anything about `parseapi` – Mar 30 '18 at 18:16

score 0 · Accepted Answer · answered May 10 '18 at 18:53

The problem is in the call to connection.request(). The "/parse" should be removed from the url that gets passed in. The working code looks as follows:

connection.request('GET', '/classes/PGA?%s' % params, '', {
       "X-Parse-Application-Id": app_id,
       "X-Parse-REST-API-Key": api_key,
   })

MartinV · Answer 3 · 2022-09-14T10:48:14.673

To connect to back4app using python requests module, you need to define App ID and REST API Key in headers (not using params)

# Your payloads
headers = {
    "X-Parse-Application-Id": "app-id",
    "X-Parse-REST-API-Key": "YOUR_IP_KEY"
}


url = 'https://parseapi.back4app.com/parse/classes/Congressmen'


# GET method, with URI parameters
response = requests.get(url, headers=headers)

print(response.url)

# Get json data from a response.
print(response.json())

How can I retrieve objects from back4app using python 3?

3 Answers3