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tcb-router's Introduction

tcb-router

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基于 koa 风格的小程序·云开发云函数轻量级类路由库,主要用于优化服务端函数处理逻辑

云函数端

使用

npm install --save tcb-router
// 云函数的 index.js
const TcbRouter = require('./router');

exports.main = (event, context) => {
    const app = new TcbRouter({ event });
  
    // app.use 表示该中间件会适用于所有的路由
    app.use(async (ctx, next) => {
        ctx.data = {};
        await next(); // 执行下一中间件
    });

    // 路由为数组表示,该中间件适用于 user 和 timer 两个路由
    app.router(['user', 'timer'], async (ctx, next) => {
        ctx.data.company = 'Tencent';
        await next(); // 执行下一中间件
    });

    // 路由为字符串,该中间件只适用于 user 路由
    app.router('user', async (ctx, next) => {
        ctx.data.name = 'heyli';
        await next(); // 执行下一中间件
    }, async (ctx, next) => {
        ctx.data.sex = 'male';
        await next(); // 执行下一中间件
    }, async (ctx) => {
        ctx.data.city = 'Foshan';
        // ctx.body 返回数据到小程序端
        ctx.body = { code: 0, data: ctx.data};
    });

    // 路由为字符串,该中间件只适用于 timer 路由
    app.router('timer', async (ctx, next) => {
        ctx.data.name = 'flytam';
        await next(); // 执行下一中间件
    }, async (ctx, next) => {
        ctx.data.sex = await new Promise(resolve => {
        // 等待500ms,再执行下一中间件
        setTimeout(() => {
            resolve('male');
        }, 500);
        });
        await next(); // 执行下一中间件
    }, async (ctx)=>  {
        ctx.data.city = 'Taishan';

        // ctx.body 返回数据到小程序端
        ctx.body = { code: 0, data: ctx.data };
    });

    return app.serve();

}

tips: 小程序云函数的 node 环境默认支持 async/await 语法,推荐涉及到的异步操作时像 demo 中那样使用

小程序端

// 调用名为 router 的云函数,路由名为 user
wx.cloud.callFunction({
    // 要调用的云函数名称
    name: "router",
    // 传递给云函数的参数
    data: {
        $url: "user", // 要调用的路由的路径,传入准确路径或者通配符*
        other: "xxx"
    }
});

接口

构造函数

  • 参数

    • Object,存入云函数的 event 参数
  • 示例

const TcbRouter = require('./router');
exports.main = (event, context) => {
    const app = new TcbRouter({ event });
};

app.use

  • 参数

    • Function, 应用于所有路由的中间件
  • 示例

app.use(async (ctx, next) => {
    ctx.data = {};
    await next(); // 执行下一中间件
});

app.router

  • 参数

    • Array|String,路由或路由数组
    • Function, 应用于对应路由的中间伯
  • 示例

app.router(['user', 'timer'], async (ctx, next) => {
    ctx.data = {}
    ctx.data.company = 'Tencent';
    await next(); // 执行下一中间件
});

// 路由为字符串,该中间件只适用于 user 路由
app.router('user', async (ctx, next) => {
    ctx.data.name = 'heyli';
    ctx.body = {code: 0, data: ctx.data}; // 将数据返回给云函数,用ctx.body
});

测试

npm run test

tcb-router's People

Contributors

flytam avatar lcxfs1991 avatar chhpt avatar

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