<rst>EN::001-Introduction::9-Differences between Open source version and SaaS version</rst>
<rst>Header: Versions of CppComet</rst> 

====== Versions of CppComet ======

There are two versions of CppComet [[https://github.com/CppComet/comet-server|pensors version]] and [[https://comet-server.com|SaaS platform]].
They are fully compatible with Api, and the only difference is when specifying the parameters for the connection.

====== Connecting from the JavaScript API ======

When connecting from the JavaScript API to the SaaS version
<code JavaScript> CometServer(). Start ({dev_id: 15, user_id: 1, user_key: "userHash"}) </code>

When connecting from the JavaScript API to the open source version
<code JavaScript> CometServer (). Start ({dev_id: 0, user_id: 1, user_key: "userHash", node: "example.com"}) </code>

====== Connecting from CometQL ======

When connecting from CometQL to SaaS version
<code php>
$ dev_id = "15";

// It is issued in a personal account on comet-server.com
$ Dev_key = "lPXBFPqNg3f661JcegBY0N0dPXqUBdHXqj2cHf04PZgLHxT6z55e20ozojvMRvB8";
$ link = mysqli_connect ("app.comet-server.ru", $ dev_id, $ dev_key, "CometQL_v1");
</code>

When connecting from CometQL to the open source version
<code php>
$ dev_id = "root";

// Set in the comet.ini file
$ Dev_key = "lPXBFPqNg3f661JcegBY0N0dPXqUBdHXqj2cHf04PZgLHxT6z55e20ozojvMRvB8";
$ link = mysqli_connect ("example.com", $ dev_id, $ dev_key, "CometQL_v1");
</code>

====== Sharing Security ======

In the SaaS version, all user data is isolated from each other based on the dev_id parameter which is specified when connecting to the server. You are using your dev_id or how you will not affect the clients that specified when you connected another dev_id.
If we talk about [[https://github.com/CppComet/comet-server|open source version]], then there is no division into dev_id, that is, it is calculated that there is only one user for one server instance. Therefore, you do not need to specify the dev_id parameter when connecting.