The user initiates a PostObject request, but in the policy form field, when the element in conditions is a List and the first element is eq or starts-with, the third element is not a string type.

Example

Assuming the text for the policy form field is constructed as follows:

{​
  "conditions": [​
    ["eq","$bucket",123]​
  ],​
  "expiration":"2023-12-28T15:04:05Z"​
}​

If this text is used to build the policy form field and a request is sent, the error will be returned.

Solution

Refer to PostObject and correctly construct the request form field, ensuring the policy form field value is valid.

Last updated: 2025.10.11 16:00:20

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