Accessing the Salesforce API for the first time... using python

Question

Really early days for me learning to use the API as well as Python.

The code below Authenticates and passes back the token correctly - but I have no idea how to pass the session ID in the code after... I get an "invalid session ID error".

I simply need help with getting the "get" to authenticate and execute a simple request successfully. Thank you!

import requests
    consumer_key = "xxxx"
    consumer_secret = "xxxx"
    username = "xxxx"
    password = "xxxx"
    payload = {
        'grant_type': 'password',
        'client_id': consumer_key,
        'client_secret': consumer_secret,
        'username': username,
        'password': password
    }
    r = requests.post("https://login.salesforce.com/services/oauth2/token",
        headers={"Content-Type":"application/x-www-form-urlencoded"},
        data=payload)
    print r.content
    r = requests.get("https://ap2.salesforce.com/services/data/v36.0/wave")
    print r.text

Answer 1

Refer to Set up Authorization:

Once authenticated, every request must pass in the access_token value in the header. It cannot be passed as a request parameter.

Parse for access_token in request.content. Then use it in Authorization header:

import json, requests
#...
body = json.loads(r.content)
token = body["access_token"]
url = body["instance_url"] + "/services/data/v36.0/limits"

r = requests.get(url, headers = {"Authorization":"Bearer " + token});
print r.content

Answer 2

For now it is necessary additionally to have security_token.

You can get it in SalesForce, using Lightning Theme:

1. Click in the top right corner your profile icon -> Settings;
2. In the tree select My Personal Information -> Reset My Security Token;
3. Click Reset Security Token;
4. Check your email for a new token.

In order to get client_id and client_secret (also known as consumer_key and consumer_secret) in SalesForce, using Lightning Theme it is necessary to:

1. Click Gear Icon in the top right corner (next to Profile Icon) -> Setup;
2. In the tree select PLATFORM TOOLS -> Apps -> App Manager;
3. Click New Connected App in the top right corner;
4. Fill in all required fields;
5. Tick Enable OAuth Settings + enter any Callback URL + select needed Scopes;
6. Click Save at the bottom, then Continue;
7. On the new page you will see Consumer Key and Consumer Secret fields.

---

import requests

email = [email protected]
password = 'your_password'
security_token = 'admlnlkrsl'

client_id = 'Asdmlansdkjaduqoenaqonq234234'
client_secret = 'sdqlasdasmdpfk2093jdsajdiom'

your_instance = 'https://your_company.lightning.force.com'

payload = {
    'grant_type': 'password',
    'client_id': client_id,
    'client_secret': client_secret,
    'username': email,
    'password': password+security_token
}

request_token_url = "https://login.salesforce.com/services/oauth2/token"

r = requests.post(
    request_token_url,
    headers={"Content-Type":"application/x-www-form-urlencoded"}, data=payload)

body = r.json()
token = body['access_token']

url = your_instance + "/services/data/v45.0"
r = requests.get(url, headers = {"Authorization":"Bearer " + token})
print('response:', r.json())

SalesForce API Username-Password OAuth Authentication Flow

SalesForce EndPoints