# 根据自定义场次UUID查询直播场次

### 接口描述

```
1、查询根据自定义场次UUID查询直播场次
3、接口支持https协议
```

### 接口URL

```
http://api.polyv.net/live/v3/channel/session/list-session-by-external
```

### 请求方式

```
GET
```

### 接口约束

1、接口同时支持HTTP 、HTTPS ，建议使用HTTPS 确保接口安全，接口调用有频率限制，[详细请查看](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/limit/README.md)

### 请求参数描述

| 参数名               | 必选   | 类型     | 说明                                                                                                                                                                                                        |
| ----------------- | ---- | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| appId             | true | String | 账号appId【详见[获取密钥](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/getSecretKey/README.md)】                                                                                        |
| timestamp         | true | Long   | 当前13位毫秒级时间戳，3分钟内有效                                                                                                                                                                                        |
| sign              | true | String | 签名，为32位大写的MD5值,`生成签名的appSecret密钥作为通信数据安全的关键信息，严禁保存在客户端直接使用，所有API都必须通过客户自己服务器中转调用POLYV服务器获取响应数据`【详见[签名生成规则](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/buildSign/README.md)】 |
| channelId         | true | String | 场次ID                                                                                                                                                                                                      |
| externalSessionId | true | String | 自定义直播场次UUID，该参数设置自【[直播场次关联自定义ID](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/channel/session/relevance-session-by-external/README.md)】                                       |

### 示例

```requestUrl
http://api.polyv.net/live/v3/channel/session/list-session-by-external?appId=fso8gzbxlr&timestamp=1636421147000&channelId=2659445&externalSessionId=binytest2021110802&sign=56933052D433EB34E9BA0F9DA5197728
```

### 响应参数描述

| 参数名     | 类型      | 说明                                                                                                                                                                  |
| ------- | ------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| code    | Integer | 响应状态码，200为成功返回，非200为失败【详见[全局错误说明](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/errorInfo/README.md)】                                    |
| status  | String  | 响应状态文本信息                                                                                                                                                            |
| message | String  | 响应描述信息，当code为400或者500的时候，辅助描述错误原因                                                                                                                                   |
| data    | Object  | 请求失败时为空，请求成功时为角色的信息 【详见[data字段描述](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/channel/session/get_session-by-external.md?id=data字段描述)】 |

#### data字段描述

| 参数名  | 类型             | 说明   |
| ---- | -------------- | ---- |
| list | List< String > | 场次ID |

### Java请求示例

```java
private static final Logger log = LoggerFactory.getLogger(ChannelOperateTest.class);
/**
 * 查询角色信息
 * @throws IOException
 * @throws NoSuchAlgorithmException
 */
@Test
public void testQuerySessionListByExternalSessionId() throws IOException, NoSuchAlgorithmException {
    //公共参数,填写自己的实际参数
    String appId = super.appId;
    String appSecret = super.appSecret;
    String userId = super.userId;
    String timestamp = String.valueOf(System.currentTimeMillis());
    //业务参数
    String url = "https://api.polyv.net/live/v3/channel/session/list-session-by-external";
    String channelId="2149710";
    String externalSessionId= "test";
 
    Map<String, String> requestMap = new HashMap<>();
    requestMap.put("appId", appId);
    requestMap.put("timestamp", timestamp);
    requestMap.put("channelId", channelId);
    requestMap.put("externalSessionId", externalSessionId);
    requestMap.put("sign", LiveSignUtil.getSign(requestMap, appSecret));
    String response = HttpUtil.get(url, requestMap);
    log.info("根据自定义场次UUID查询直播场次，返回值：{}", response);
    //do somethings
    
}
```

### 响应示例

系统全局错误说明详见[全局错误说明](https://git.polyv.net/help-center/document-center/-/blob/master/live/api/errorInfo/README.md)

成功示例

```json
{
    "code": 200,
    "status": "success",
    "message": "",
    "data": {
        "list": [
            "g41jb9hxbk",
            "g41ked2ck6",
            "g41k9buc96",
            "g41jwdl09l"
        ]
    }
}
```

异常示例

```json
{
    "code": 400,
    "status": "error",
    "message": "invalid signature.",
    "data": ""
}
```


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