czdb

czdb-search-node

简体中文

A Node.js package for querying the new format data of the Pure IP offline community version database czdb. It supports two types of search algorithms: in-memory search (MEMORY) and B-tree search (BTREE). The database type (IPv4 or IPv6) and query type (MEMORY, BTREE) are determined at runtime.

Supports IPv4 and IPv6

czdb-search supports querying both IPv4 and IPv6 addresses. When creating a DbSearcher instance, you need to provide the corresponding database file and key.

Database files and keys can be obtained from www.cz88.net.

Installation

Please use Node.js v8.0.0 or higher to get ES6 support.

npm

npm install czdb

yarn

yarn add czdb

pnpm

pnpm add czdb

Usage

Note: czdb has been changed to an ESM package, so please set "type": "module" in the project's package.json when import it in the js file. For details, see Pure ESM

// Import DbSearcher
import DbSearcher, { QueryType } from "czdb";

// CommonJS require:
// const { default: DbSearcher, QueryType } = require('czdb');

// Prepare your .czdb file and key
const IPV4_DB_PATH = "YOUR_IPV4_DB_PATH";
const IPV4_IP = "1.64.219.93";
const KEY = "YOUR_KEY_HERE";

// Create a search instance
const searcher = new DbSearcher(IPV4_DB_PATH, QueryType.BTREE, KEY);

// Use the search method to search the database based on the provided IP address
const region = searcher.search(IPV4_IP);

// The returned string format is "Country–Province–City–Region ISP". If the search fails, it will return null.
console.log(region); // China–Hong Kong  PCCW Limited

// Get the database version
const version = searcher.getVersion();

console.log(region); // 20250103

Example

You can find a simple usage example in the example folder. After filling in the path and key, run the following commands to test:

npm run test

Query Types

DbSearcher supports 2 query types: MEMORY and BTREE.

MEMORY: This mode is thread-safe and stores data in memory. BTREE: This mode uses the B-tree data structure for queries. You can choose the query type when creating a DbSearcher instance.

DbSearcher searcher = new DbSearcher("YOUR_DB_PATH", QueryType.BTREE, "YOUR_KEY");

Close the Database

When the query is finished and no longer needed, you should close the database.

searcher.close();

This will release all used resources and close access to the database file.