Скачать или смотреть How to Resolve the AUTHORIZATION_INVALID_TOKEN Error in DocuSign API Connections

Learn how to troubleshoot and fix the `AUTHORIZATION_INVALID_TOKEN` error when connecting with DocuSign API credentials, ensuring seamless envelope sending.
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This video is based on the question https://stackoverflow.com/q/70454922/ asked by the user 'Javier Gomez' ( https://stackoverflow.com/u/17743761/ ) and on the answer https://stackoverflow.com/a/70456502/ provided by the user 'Inbar Gazit' ( https://stackoverflow.com/u/3255871/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Resolving the AUTHORIZATION_INVALID_TOKEN Error in DocuSign API Connections

If you're working with the DocuSign API and have encountered the dreaded AUTHORIZATION_INVALID_TOKEN error while attempting to send an envelope PDF, you are not alone. Many developers face this issue, which manifests as an HTTP 401 error, suggesting that the access token used for API calls is either expired, revoked, or malformed. In this guide, we'll dig deep into understanding this problem and provide a step-by-step guide on resolving it effectively.

Understanding the Error

When you attempt to connect to the DocuSign API and receive an error message like the following:

[[See Video to Reveal this Text or Code Snippet]]

It signifies an issue with the access token you've provided for authorization. Access tokens are essential for authentication purposes while using APIs, and any problems with these tokens can prevent successful API calls.

What Causes the Error?

Expired Tokens: Access tokens typically have a limited lifespan, usually around 8 hours.

Revoked Tokens: If your token is revoked due to security settings or changes in permissions, it will no longer be valid.

Malformed Tokens: Any errors in how the token was generated or formatted can lead to this issue.

Solution to Fix the AUTHORIZATION_INVALID_TOKEN Error

Step 1: Be Mindful of Token Expiration

Access tokens must be refreshed periodically. If you are hardcoding a token into your application, make sure it is not older than 8 hours. Hardcoding tokens is common for quick tests, but it’s not a viable long-term solution.

Step 2: Implement Real-Time Token Retrieval

Instead of managing tokens manually, implement a system to retrieve them automatically when needed. Here's how to do it using JWT (JSON Web Tokens):

Initial Authorization: First, obtain user consent to use the API. This can be done through an initial login process where the user grants your application access.

Store Credentials Securely: Once authorized, store the necessary credentials securely in your application (but avoid hardcoding tokens). You'll typically have:

Client ID

Client Secret

User ID

Private Key (for JWT)

Real-Time Token Generation: Use your private key to generate a new access token when needed through your code. This method ensures that your application can always have a valid token in real time.

Example in Code (Pseudo Code)

Here’s a simple example of how you might structure your code to generate a new access token using JWT:

[[See Video to Reveal this Text or Code Snippet]]

Step 3: Error Handling

Make sure to implement error handling in your application. If a token is invalid, your application should:

Log the error details for troubleshooting.

Attempt to generate and use a new token.

Provide user feedback if the issue persists.

Conclusion

In summary, if you're struggling with an AUTHORIZATION_INVALID_TOKEN error while using the DocuSign API, remember to avoid hardcoding tokens and instead utilize real-time token generation via JWT. This will not only resolve your immediate issues but will also enhance the security and reliability of your API interactions.

By following the steps outlined above, you can seamlessly connect to the DocuSign API, ensuring your envelope sending functionality operates without a hitch. Don’t hesitate to revisit your token management strategy to avoid running into similar problems in the future.