Nodejs-ioredis-command

require ioredis

const Redis = require('ioredis');
const fs = require('fs');

const tlsSettings = {
  rejectUnauthorized: false,
  key: fs.readFileSync('/opt/Will_Project/formdataAPI/certificate/ys_client.key', 'ascii'),
  cert: fs.readFileSync('/opt/Will_Project/formdataAPI/certificate/ys_client.crt', 'ascii'),
  ca: [fs.readFileSync('/opt/Will_Project/formdataAPI/certificate/ys_ca.key', 'ascii')]
};

const redis = new Redis({
  host: '127.0.0.1',
  port: 6379,
  tls: tlsSettings,
});

SELECT -- 選擇 DB: 0 ~15

function selectDB(dbNumber){
  return new Promise((resolve, reject) => {
    redis.select(dbNumber, () => {
      console.log(new Date(), 'Redis Client Connect To DB',dbNumber);
      resolve()
    })
  });
}

SET -- 新增、更新資料

function setKey(key, data ){
  return new Promise((resolve, reject) => {
    redis.set(key, JSON.stringify(data), function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'Set Key',key,'Result ->' + result);
      resolve(result);
    })
  })
}

SET KEY EXPIRE -- 設定資料到期時間，單位為秒
ex: setKeyExpire('1770ZZ:inLane', data, 300) //設定此資料expire time - 300秒

function setKeyExpire(key, data, expireTime ){
  return new Promise((resolve, reject) => {
    redis.set(key, JSON.stringify(data), 'ex', expireTime, function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'Set Key',key,'Expire Time Result ->' + result);
      resolve(result);
    })
  })
}

GET -- 取得資料

function getKey(key){
  return new Promise((resolve, reject) => {
    redis.get(key, function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'Get Key',key,'Result ->' + result);
      resolve(result);
    })
  })
}

DEL -- 刪除資料

function delKey(key){
  return new Promise((resolve, reject) => {
    redis.del(key, function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'Del Key',key,'Result' + result);
      resolve(result);
    })
  })
}

LPUSH -- 新增 List 資料

function lpushKey(key, value){
  return new Promise((resolve, reject) => {
    redis.lpush(key, value, function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'LPUSH Key',key,'Result ->' + result);
      resolve(result);
    })
  })
}

LRANGE -- 取得 List 資料

function getListKey(key, startIndex, endIndex){
  return new Promise((resolve, reject) => {
    redis.lrange(key, startIndex, endIndex, function(err, result) {
      if (err) reject(err)
      console.log(new Date(), 'LRANGE Key',key,'Result ->' + result);
      resolve(result);
    })
  })
}

SCAN -- 模糊搜尋key
ex: scanKey('3896NN*')

function scanKey(matchKey, dbNumber){
  return new Promise((resolve, reject) => {

    if (dbNumber !== undefined) redis.select(dbNumber)
    const stream = redis.scanStream({
      match: matchKey
    });
    let result_array = []
    stream.on("data", (resultKeys) => {
      for (let i = 0; i < resultKeys.length; i++) {
        result_array.push(resultKeys[i])
        //console.log(resultKeys[i]);
      }
    });
    stream.on("end", () => {
      console.log(new Date(), "All keys have been visited");
      resolve(result_array)
    });
  })
}

Return to Top