The user initiates a PostObject request, but the policy form field contains unsupported fields. The valid policy form field is a JSON text encoded to include expiration and conditions fields.

Example

Assuming the JSON text constructing the policy form field is as follows:

{​
  "conditions": [​
    {"bucket": "examplebucket"},​
    ["eq", "$key", "exampleobject"]​
  ],​
  "test":"abc"​
}​

If this is used to construct the policy form field and initiate the request, this error is returned.

Solution

See PostObject for properly constructing request form fields and ensuring the policy form field contains valid values.

Last updated: 2025.10.11 16:00:22

Public security network record in Beijing: No. 11010802032137