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eBay Oauth token – unable to exchange authorization code for a User access token

I am getting {"error":"invalid_client","error_description":"client authentication failed"} 401 response.
I did manage to get a user consent (docs: https://developer.ebay.com/api-docs/static/oauth-authorization-code-grant.html) by accessing the url manually and logging in to my account:

import requests, urllib, base64

my_AppID = "someAppID"
my_Ru_Name = "someRuName"
scope = "https://api.ebay.com/oauth/api_scope/sell.fulfillment"
scope = urllib.parse.quote_plus(scope)

url = f"""https://auth.ebay.com/oauth2/authorize?
client_id={my_AppID}&
redirect_uri={my_Ru_Name}&
response_type=code&
scope={scope}&"""

I printed the url string and accessed it in the browser, logged in and "consented".
This page said "Authorization successfully completed." so I took the code value from the new redirected page url.
After this I was unable to exchange the authorization code for a User access token:

my_CertID = "someCertID"
client_id = base64.b64encode(my_AppID.encode())
client_secret = base64.b64encode(my_CertID.encode())
auth_string = "Basic " + client_id.decode() + ":" + client_secret.decode()

consent_code = "v%521.1%25i..................jYw" # from the page's link after logging in
consent_code = urllib.parse.quote_plus(code)

headers = {"Content-Type": "application/x-www-form-urlencoded", "Authorization": auth_string}
data = {"grant_type": "authorization_code", "code": consent_code , "redirect_uri": Ru_Name}
url_token = "https://api.ebay.com/identity/v1/oauth2/token"

resp = requests.post(url_token, headers=headers, data=data)
print(resp.text)

# the response I get:
{"error":"invalid_client","error_description":"client authentication failed"}

What am I doing wrong?
Is it the request part? The encoding?

I am kinda new to all this so thanks in advance!

Tags:

3

Answers


  1. 0

    try following:

    client_id = my_AppID
client_secret = my_CertID
auth_string = "Basic " + base64.b64encode(client_id + ":" + client_secret)
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  2. 0

    I was having problems but have now got them sorted and use a drupal module to get my access token. I have made this available as a service here at apiauth.net. Let me know if it is any help.

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  3. 0

    The consent_code is url encoded. You need to decode it (use online service).

    url encoded the code looks like this: v%5E1.1%23i%5E1%23f%5E0%23r… – which is wrong.
    After url decode it looks like this: v^1.1#i^1#f^0#r^1#p^3#I^3…

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