# Get decompression rule information - DescribeUdsRule

## Overview

Query for decompression rules






## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `DescribeUdsRule`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.dezai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **BucketName** | string | Source BucketName |**Yes**|
| **RuleId** | string | Rule ID, if not set, query all rules of this bucket |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|
| **TotalCount** | int | The ID of the rule to be deleted |**Yes**|
| **DataSet** | array[string] | Rule Array |No|




## Example

### Request Example
    
```
https://api.dezai.com/?Action=DescribeUdsRule
&BucketName=“BucketName”
&RuleId="RuleId"
```

### Response Example
    
```json
{
  "Action": "DescribeUdsRuleResponse",
  "DataSet": [
    "zivXZtSg"
  ],
  "Message": "fhLdrSPb",
  "RetCode": 0,
  "RuleId": "wyOlYNVU"
}
```