A simple, minimalistic, web-based LevelDB viewer for Node.js.
Install the module with npm i --save @pcan/leveldb-viewer. The following snippet shows the sample usage:
const { createViewerServer } = require('@pcan/leveldb-viewer');
const leveldown = require('leveldown');
const levelup = require('levelup');
const encode = require('encoding-down');
const db = levelup(encode(leveldown('/path/to/db'), { keyEncoding: 'buffer', valueEncoding: 'json' }));
const server = createViewerServer(db); // This returns a Node.JS HttpServer.
server.<
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/span>listen(9090); // you may invoke listen...
server.close() // ...and close.Once you started the server with server.listen(9090) open the browser at http://localhost:9090. You should be able to explore the contents of your LevelDB instance using a tree view.
The webpage uses a minimal API to retrieve data:
GET /api/queryretrieves the keys (or their common prefixes) usingrootparam to specify the desired prefix andlimitto limit the number of records. The response returns an array of objects having this format:{val: string, count: number}. Thevalfield is the prefix (or the whole key) andcountis the number of records having that prefix.GET /api/valueretrieves the value (as JSON object) having the specifiedkeyparam.