eBay Python SDK Trading API连接异常：获取Session ID及FetchToken失败

Hey Leo, let's dig into why your GetSessionID call is throwing connection errors. Here are the most common fixes and checks to run through:

1. Missing Required RuName Parameter #

The GetSessionID call requires the RuName (Redirect URL Name) parameter—this is the registered redirect URL name you set up in your eBay developer account. Your current code doesn't pass this, which is almost certainly causing a validation error that's manifesting as a connection issue.

2. Verify API Environment Configuration #

By default, the SDK connects to eBay's production environment. If you're testing with sandbox credentials, you need to explicitly set sandbox=True when initializing the Connection object. Mismatching credentials and environment will trigger connection/authorization failures.

3. Double-Check Your Credentials #

Ensure your APP_ID, DEV_ID, and CERT_ID are correct for the environment you're using (sandbox vs production). It's easy to mix up sandbox and production credentials, so confirm these match what's listed in your eBay Developer Portal.

4. Improve Error Handling for Debugging #

Your current except block is incomplete—expanding it to print the full error details will tell you exactly what's going wrong (e.g., invalid parameters, unauthorized access, network issues).

Corrected Code Example #

Here's an updated version of your code that addresses these points:

import datetime
from ebaysdk.exception import ConnectionError
from ebaysdk.trading import Connection

try:
    # Initialize connection with sandbox environment (remove sandbox=True for production)
    api = Connection(
        appid='YOUR_SANDBOX_APP_ID',
        devid='YOUR_SANDBOX_DEV_ID',
        certid='YOUR_SANDBOX_CERT_ID',
        config_file=None,
        sandbox=True,
        ruName='YOUR_REGISTERED_RU_NAME'  # Required for GetSessionID
    )
    
    # Execute GetSessionID with the required parameter
    response = api.execute('GetSessionID', {'RuName': 'YOUR_REGISTERED_RU_NAME'})
    
    # Print the response to confirm success
    print(response.dict())

except ConnectionError as e:
    # Print full error details for debugging
    print(f"Connection Error Occurred: {e}")
    print(f"Error Details: {e.response.dict()}")

Additional Checks #

• Make sure your network allows outgoing requests to eBay's API endpoints (sandbox: api.sandbox.ebay.com, production: api.ebay.com). Firewalls or proxies might block these calls.
• Confirm your eBay developer account is active and the Trading API is enabled for your app.

内容的提问来源于stack exchange，提问作者Leo Ribeiro