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@taccisum/egg-utils

v0.3.0

Published

deepexi utils for eggjs

Downloads

6

Readme

egg-utils

NPM version npm download Build Status codecov

CHANGELOG

依赖的插件

  • circuit-fuses v4.x
  • request v2.x

如何使用

添加依赖

$ npm i @taccisum/egg-utils --save

开启插件

// config/plugin.js
exports.utils = {
  enable: true,
  package: 'egg-utils',
};

http utils

简单请求:

const resp = await ctx.helper.http.requestGet('http://www.baidu.com')

sse utils

注意:node长连接默认2分钟会超时,如服务端连接发送事件的间隔需超过2分钟,需服务端自行处理(设置timeout时间 or 在2分钟的间隔内发送无效事件)

使用示例

server端
单次发送消息(如状态需实时返回给前端)
/* router */
app.get('logs', `/${APP_CONTEXT}/api/v2/logs`, app.controller.v1.getLog);
/* router */
const SSEUtils = ctx.helper.sse;
/* controller */
async getLog () {
  const ctx = this.ctx;
  ctx.body = SSEUtils.send({
    setResHeader: resHeaders => {
      ctx.set(resHeaders);
    },
    sendType: 'once',
    onceMsg: 'hello world',
  });
}
其他情况发送消息(非单次,或者其他任意情况)
/* router */
app.get('logs', `/${APP_CONTEXT}/api/v2/logs`, app.controller.v1.getLog);
/* router */
const SSEUtils = ctx.helper.sse;
/* controller */
async getLog () {
  const ctx = this.ctx;
  const msgs = ['hello' 'world'];
  let interval = null
  ctx.body = SSEUtils.send({
    setResHeader: resHeaders => {
      ctx.writeHead(resHeaders);
    },
    sendType: 'other',
    sender: send => {
      let index = 0;
      interval = setInterval(() => {
        const msg = index === msgs.length ? 'sseEnd' : msgs[index];
        send(msg);

        if (msg === 'sseEnd') {
          // 清除事件
          clearInterval(interval);
        }
        index++;
      }, 1000); //每秒发送一次消息
    },
  })
}

API

Methods

| 方法名 | 说明 | 参数 | | :--: | :--: | ---- | | send | 与客户端建立长连接,返回值是 stream对象 | optsions选项options.setResHeader 设置请求头function,requiredoptions.sendType once单次 repeat重复 other其他,默认发送一次options.sender 消息发送者,处理什么时候发送消息和结束发送消息,参数send func,结束需要发送'sseEnd'消息,非一次使用options.onceMsg 单次发送消息主体,默认是''options.retry 长连接发送错误时,重试频率,毫秒, 默认10s options.msgReplace 无法处理消息带换行符的情况,提供替换的正则,默认为'' options.finishCb stream结束时钩子函数 |

crypto utils

使用示例

md5加密
const CryptoUtils = ctx.helper.crypto;
const hashData = CryptoUtils.md5('data', 'salt');
aes加密
const CryptoUtils = ctx.helper.crypto;
const data = 'data';
const secretKey = 'secretKeyDataKey';   // 秘钥必须16位
const iv = 'secretKeyDataKey';          // 初始向量 initial vector 必须16位
CryptoUtils.aesEncrypt(data, secretKey, iv);
aes解密
const CryptoUtils = ctx.helper.crypto;
const data = 'data';
const secretKey = 'secretKeyDataKey';   // 加密时的秘钥 必须16位
const iv = 'secretKeyDataKey';          // 加密时的初始向量 initial vector 必须16位
CryptoUtils.aesDecrypt(data, secretKey, iv);
aes加解密对象
const CryptoUtils = ctx.helper.crypto;
CryptoUtils.getCipheriv(algorithm, secretKey, iv);
CryptoUtils.getDecipheriv(algorithm, secretKey, iv);

License

MIT