> ## Documentation Index
> Fetch the complete documentation index at: https://developer.wooxpro.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 订阅

用户可以选择订阅一个或者多个频道，多个频道总长度不能超过4096个字节

### 订阅消息格式

`{"action":"subscribe","args":["<topic>"]}`

#### 参数说明

* `action` = subscribe
* `args` 数组内容为订阅的主题名称 topic
* `topic` 由`<channel>:<filter>`组成
  * 其中channel 是以 business/name组成
  * filter 是可筛选数据，具体参考每个频道说明

### 示例

1. 向WOO X Pro服务器发送消息

   `{"action":"subscribe","args":["futures/klineBin1m:BTCUSDT"]}`

2. WOO X Pro服务器返回订阅结果, success=true 表示订阅成功

   `{"action":"subscribe","group":"futures/klineBin1m:BTCUSDT","success":true,"request":{"action":"subscribe","args":["futures/klineBin1m:BTCUSDT"]}}`