If you're unable to upload a file to the Autodesk Forge server, here are the most common causes and how to troubleshoot them:

✅ 1. Authentication Issues

You need a valid access token to use the Forge Data Management API.

Check:

• Are you using a valid OAuth token (2-legged or 3-legged, depending on your use case)?

• Is the token not expired?

• Does your app have the correct scopes (e.g., data:write, bucket:create, data:create)?

Fix:
Regenerate the token using the correct client ID/secret and ensure scopes are properly set.

✅ 2. Bucket Issues

Files in Forge are uploaded to buckets. If the bucket doesn’t exist or you don’t have permission, the upload will fail.

Check:

• Does the bucket already exist?

• Are you using the correct bucket key?

• Is the bucket in the right region?

Fix:
Use this API to create a bucket before uploading:

http

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POST https://developer.api.autodesk.com/oss/v2/buckets

✅ 3. Uploading File Error

To upload a file, you typically use:

http

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PUT https://developer.api.autodesk.com/oss/v2/buckets/:bucketKey/objects/:objectName

Common issues:

• File name (:objectName) includes spaces or unsupported characters.

• Content-Type header missing or incorrect.

• File is too large for single PUT (Forge has limits).

Fix:

• Encode object name properly (URL-safe).

• Set headers like:

http

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Content-Type: application/octet-stream Authorization: Bearer <access_token> Content-Length: <file_size>

For large files (>100 MB), use resumable uploads.

✅ 4. Missing or Incorrect Headers

Forge APIs are sensitive to headers.

Ensure headers include:

http

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Authorization: Bearer <access_token> Content-Type: application/octet-stream

✅ 5. Check the Response/Error Message

Forge will typically return an error message or status code. Some common ones:

• 401 Unauthorized → Token issue

• 403 Forbidden → Invalid bucket or permission

• 404 Not Found → Bucket or object name incorrect

• 413 Payload Too Large → Use resumable uploads

✅ 6. Use Postman or Curl for Debugging

Try this from command line:

bash

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curl -X PUT \ -H "Authorization: Bearer YOUR_ACCESS_TOKEN" \ -H "Content-Type: application/octet-stream" \ --data-binary "@yourfile.dwg" \ "https://developer.api.autodesk.com/oss/v2/buckets/your-bucket/objects/yourfile.dwg"

Chandraprabha?