15、获取车场通道列表

> 
>  支持 SDK车场、4G 车场
调用该接口查询指定车场的云端通道信息，以便进行开关闸等操作。

测试地址：http://test.bolink.club/zld/openservice/getchannels
正式地址：http://yun.bolink.club/zld/openservice/getchannels
字段信息：

|   名称 |  说明  |  类型|  示例  |   是否必传字段 |
| --- | --- | --- | --- |  --- |
comid |车场编号 |String |3251| 是
union_id |厂商平台账号| String |200002 |是
query_time|查询时间 |number|1618905936|是

示例：

{"data": {"comid": "21961","union_id": "200174","query_time": "1618969601"},"sign":"6F8F98781D476C51E4614F8281E34110"}

对 json 进行Base64编码：
eyJkYXRhIjogeyJjb21pZCI6ICIyMTk2MSIsInVuaW9uX2lkIjogIjIwMDE3NCIsInF1ZXJ5X3RpbWUiOiAiMTYxODk2OTYwMSJ9LCJzaWduIjoiNkY4Rjk4NzgxRDQ3NkM1MUU0NjE0RjgyODFFMzQxMTAifQ==

同步返回:Base64处理过的字符串
|   名称 |   类型 |  说明|    是否必传字段|  示例  |
| --- | --- | --- | --- |  --- |
state | Number  | 调用结果 0失败，1成功  | 是  | 1
message  | String |  提示信息  | 是  | 修改成功
comid	|	String	|车场编号|
channel_list|	Array	|查询成功返回的集合数据(以下数据必传)	|是|	[]
channel_id	|String	|通道编号		
channel_name|String	|通道名称		
passtype|string|通道进出方向，1 入口，0 出口|

eyJkYXRhIjp7InN0YXRlIjoxLCJjb21pZCI6IjIxOTYxIiwibWVzc2FnZSI6IuafpeivouaIkOWKnyEiLCJjaGFubmVsX2xpc3QiOlt7ImNoYW5uZWxfbmFtZSI6IuWwj+WcuuWFpeWPoyIsInBhc3N0eXBlIjoiMSIsImNoYW5uZWxfaWQiOiI1MzAzOCJ9LHsiY2hhbm5lbF9uYW1lIjoi5YyX5Lqs5rWL6K+V6L2m5Zy6MTEx5Ye65Y+jIiwicGFzc3R5cGUiOiIxIiwiY2hhbm5lbF9pZCI6IjE4OTEifSx7ImNoYW5uZWxfbmFtZSI6IuWMl+S6rOa1i+ivlei9puWcujExMeWFpeWPoyIsInBhc3N0eXBlIjoiMCIsImNoYW5uZWxfaWQiOiIxODkwIn1dfSwic2lnbiI6IjZGOEY5ODc4MUQ0NzZDNTFFNDYxNEY4MjgxRTM0MTEwIn0=
base64解码后的结果：
{"data":{"state":1,"comid":"21961","message":"查询成功!","channel_list":[{"channel_name":"小场入口","passtype":"1","channel_id":"53038"},{"channel_name":"北京测试车场111出口","passtype":"1","channel_id":"1891"},{"channel_name":"北京测试车场111入口","passtype":"0","channel_id":"1890"}]},"sign":"6F8F98781D476C51E4614F8281E34110"}