[Feature] Request content based on file and database caching, not just through memory

[GrinZero]

Desc

Request content based on file and database caching, not just through memory. Otherwise, the memory pressure will be high.

To Resolve?

Unreasonable complete use of memory to save data

Resolutions(Optional)

Use some third-party storage libraries to manage data caching

[GrinZero]

some package may useful:

• node-persist
• lowdb
• flat-cache