Introduction
This documentation contains the information necessary to develop your own Wialon-based applications.
Only the POST method is used for the requests. The additional parameters (params) are sent and returned as JSON. For all text parameters, the UTF-8 coding should be used.
It is recommended to use the DEC format as HEX is only supported as a text format.
For Wialon Hosting, the http://hst-api.wialon.com/ host is used in the requests (http://hst-api.wialon.us/, http://hst-api.wialon.ru/ — depending on the data centre), for Wialon Local — the URL monitoring site.
Request template
A template of any request should be like this:
http://{host}/wialon/ajax.html?sid=<text>&svc=<svc>¶ms={<params>}
It is necessary to indicate Content-Type:application/x-www-form-urlencoded in the request header.
Parameters
The following parameters must be used in a request:
| Name | Description |
|---|---|
| sid | The unique ID of the session. |
| svc | The name of the request. |
| params | The parameters for the request execution. |
The following sections describe only the values of the parameters svc and params.
The session identifier (sid) is a required parameter for all requests. The exceptions are the requests from the Token login section and some requests from the Other requests section.
If there are no running requests, the default session duration is 5 minutes. To maintain the session, you should use the constant sending of the avl_evts request, for example, every 2 seconds.
All numbers, including flags, must be in decimal system.