# DescribeListeners

## 1. 接口描述

本接口(DescribeListeners)用于查询一台或多台指定Listener的信息。用户可以根据负载均衡实例的ID、监听器的ID等信息来搜索监听器的信息。

## 2. 请求参数

以下请求参数列表仅列出了接口中需要的请求参数

| 参数名称            | 必选 | 类型              | 描述                                   |
| --------------- | -- | --------------- | ------------------------------------ |
| listenerIds     | 否  | Array of String | <p>监听器ID列表。</p><p>最多支持100个。</p>      |
| loadBalancerIds | 否  | Array of String | <p>负载均衡实例ID列表。</p><p>最多支持100个。</p>   |
| listenerName    | 否  | String          | <p>监听器名称。</p><p>支持模糊搜索。</p>          |
| pageNum         | 否  | Integer         | <p>返回的分页数。</p><p>默认值：1</p>           |
| pageSize        | 否  | Integer         | <p>返回的分页大小。</p><p>默认为20，最大为1000。</p> |

## 3. 响应结果

| 参数名称       | 类型                                                                                   | 描述                                                       |
| ---------- | ------------------------------------------------------------------------------------ | -------------------------------------------------------- |
| requestId  | String                                                                               | <p>唯一请求 ID。</p><p>每次请求都会返回。定位问题时需要提供该次请求的 requestId。</p> |
| totalCount | Integer                                                                              | 符合条件的Listener总数量。                                        |
| dataSet    | Array of [ListenerInfo](/api-reference/cn/compute/bmc/datastructure.md#listenerinfo) | 监听器集合。                                                   |

## 4. 代码示例

{% tabs %}
{% tab title="示例" %}

1. **根据负载均衡实例ID查询。**

```json
POST /api/v2/bmc HTTP/1.1
Host: console.zenlayer.com
Content-Type: application/json
X-ZC-Action: DescribeListeners
Request:
{
  "loadBalancerIds": ["xxxx"]
}
Response:
{
  "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F",
  "response": {
    "requestId": "TEEFDCA5B-76FB-4E91-A18E-DF7F5D2CE41F",
    "totalCount": 10,
    "dataSet": [
      {
        "listenerId": "xxxxx",
        "listenerName": "xxxx",
        "status": "Available",
        "port": "80",
        "protocol": "TCP",
        "backendProtocol": "TCP",
        "scheduler": "rr",
        "kind": "DR",
        "loadBalancerId": "xxxx",
        "createTime": "2022-08-31 11:11:20"
      }
    ]
  }
}
```

{% endtab %}
{% endtabs %}

## 5. 开发者工具

Zenlayer Cloud API 2.0 提供了配套的[开发工具集（SDK）](/api-reference/cn/api-introduction/toolkit.md)，未来会陆续支持更多开发语言，方便快速接入和使用Zenlayer的产品和服务。

## 6. 错误码

下面包含业务逻辑中遇到的错误码，其他错误码见[公共错误码](/api-reference/cn/api-introduction/instruction/commonerrorcode.md)

| HTTP状态码 | 错误码 | 说明 |
| ------- | --- | -- |


---

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