Data processing method, apparatus, device, and system

A data processing device, comprising:

• a processor;
• and
• a memory storing instructions executable by the processor,
• wherein the processor is configured to:
• send a plug-in service request to a platform server, the plug-in service request comprising a plug-in identifier configured for the platform server to establish a usage association between a plug-in corresponding to the plug-in identifier and an applet, wherein the plug-in has an independent data server;
• receive an applet access request, determine whether the applet access request and a service corresponding to the plug-in meet a preset correspondence, and if it is determined that the applet access request and the service corresponding to the plug-in meet the preset correspondence, load the plug-in according to the usage association;
• and
• send the applet access request to the plug-in, so that the plug-in completes a task corresponding to the applet access request by accessing the data server of the plug-in,
• wherein the plug-in comprises at least one of a component, a page, or a calling interface, and the processor is further configured to load the plug-in by using at least one of:
• embedding the component in the plug-in into the applet, the component being provided with a component attribute configured to cause the applet to send the applet access request to the plug-in;
• adding a link to the page in the plug-in to the applet;
• or
• calling the calling interface in the plug-in,
• wherein in loading the plug-in by calling the calling interface in the plug-in, the processor is further configured to:
• send a callback function to the plug-in through the calling interface, so that the plug-in accesses a data server of the applet when calling the callback function.