first commit

.gitignore

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+node_modules
+yarn.lock

README.md

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+# 我的koa模板
+- bin 基础依赖
+- cmntroller 路由文件地址
+- app.js 入口文件

app.js

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+const Koa = require("koa");
+const requter = require("./bin/router.js");
+dbs = require("./bin/mongodb.js")('mongodb://localhost:27017/wxdemo',"javavue")
+// console.log(requter)
+// import requter from "./bin/router"
+
+const app = new Koa();
+app.use(async (ctx, next) => {
+    // 允许来自所有域名请求
+    ctx.set("Access-Control-Allow-Origin", "*");
+    // 这样就能只允许 http://localhost:8080 这个域名的请求了
+    // ctx.set("Access-Control-Allow-Origin", "http://localhost:8080"); 
+    // 设置所允许的HTTP请求方法
+    ctx.set("Access-Control-Allow-Methods", "OPTIONS, GET, PUT, POST, DELETE");
+
+    // 字段是必需的。它也是一个逗号分隔的字符串，表明服务器支持的所有头信息字段.
+    ctx.set("Access-Control-Allow-Headers", "x-requested-with, accept, origin, content-type, referer, user-agent");
+
+    // 服务器收到请求以后，检查了Origin、Access-Control-Request-Method和Access-Control-Request-Headers字段以后，确认允许跨源请求，就可以做出回应。
+    // Content-Type表示具体请求中的媒体类型信息
+    ctx.set("Content-Type", "application/json;charset=utf-8");
+
+    // 该字段可选。它的值是一个布尔值，表示是否允许发送Cookie。默认情况下，Cookie不包括在CORS请求之中。
+    // 当设置成允许请求携带cookie时，需要保证"Access-Control-Allow-Origin"是服务器有的域名，而不能是"*";
+    ctx.set("Access-Control-Allow-Credentials", true);
+
+    // 该字段可选，用来指定本次预检请求的有效期，单位为秒。
+    // 当请求方法是PUT或DELETE等特殊方法或者Content-Type字段的类型是application/json时，服务器会提前发送一次请求进行验证
+    // 下面的的设置只本次验证的有效时间，即在该时间段内服务端可以不用进行验证
+    ctx.set("Access-Control-Max-Age", 300);
+
+    /*
+    CORS请求时，XMLHttpRequest对象的getResponseHeader()方法只能拿到6个基本字段：
+        Cache-Control、
+        Content-Language、
+        Content-Type、
+        Expires、
+        Last-Modified、
+        Pragma。
+    */
+    // 需要获取其他字段时，使用Access-Control-Expose-Headers，
+    // getResponseHeader('myData')可以返回我们所需的值
+    //https://www.rails365.net/articles/cors-jin-jie-expose-headers-wu
+    ctx.set("Access-Control-Expose-Headers", "myData");
+    if(ctx.method == "OPTIONS"){
+    ctx.body = ""
+
+    }else{
+    await next();
+
+    }
+})
+app.use(async (ctx,next)=>{
+    // await next();
+    console.log(ctx.url)
+    // console.time("asd")
+    // ctx.response.body = {a:1};
+    await next()
+    // console.log("执行")
+    // console.timeEnd("asd")
+});
+
+
+const bodyParser = require('koa-bodyparser');
+app.use(bodyParser());
+// console.log(requter())
+app.use(requter());
+app.listen(3002);
+console.log("http://localhost:3002")

bin/mongodb.js

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+var MongoClient = require('mongodb').MongoClient;
+var dburl;
+let idadd = async (set) => {
+    let id = 0
+    if (set == "idadd") {
+        return 0;
+    } else {
+        await find('idadd', { 'set': set }).then((res) => {
+            if (res.data.length != 0) {
+                id = res.data[0].num_key
+            } else {
+                id = 1
+            }
+        })
+    }
+
+    if (id == 1) {
+        await add('idadd', { set, 'num_key': 2 })
+    } else if (set != "idadd") {
+        console.log(id)
+
+        await update('idadd', { 'set': set }, { 'num_key': id + 1 })
+    }
+    console.log(id)
+    return id
+
+}
+let add = async (set, data, url = dburl) => {
+    if (set != "idadd") {
+        let id = await idadd(set)
+        data.num_key = id
+    }
+
+    return new Promise((resolve, reject) => {
+
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            try {
+                dbo.collection(set).insertOne(data, function (err, res) {
+                    if (err) throw err;
+                    db.close();
+                    resolve({ code: 0 ,msg:"添加成功"});
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+let adds = async (set, data, url = dburl) => {
+
+    if (set != "idadd") {
+        for (let i in data) {
+            let id = await idadd(set)
+            data[i].num_key = id
+        }
+    }
+    return new Promise((resolve, reject) => {
+
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            try {
+                dbo.collection(set).insertMany(data, function (err, res) {
+                    if (err) throw err;
+                    db.close();
+                    resolve({ code: 0, num: res.insertedCount });
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+let remove = async (set, where, url = dburl) => {
+    return new Promise((resolve, reject) => {
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            try {
+                dbo.collection(set).deleteOne(where, function (err, obj) {
+                    if (err) throw err;
+                    db.close();
+                    resolve({ code: 0 });
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+let removes = async (set, where, url = dburl) => {
+    return new Promise((resolve, reject) => {
+        if (where == "" || Object.keys(where).length == 0) {
+            reject({ code: 1 })
+        }
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            try {
+                dbo.collection(set).deleteMany(where, function (err, obj) {
+                    if (err) throw err;
+                    db.close();
+                    resolve({ code: 0, num: obj.result.n });
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+let find = async (set, where = {}, page = 0, num = 0, url = dburl) => {
+    return new Promise((resolve, reject) => {
+        if (num == 0) {
+            MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+                if (err) throw err;
+                var dbo = db.db(url.dbname);
+                try {
+                    dbo.collection(set).find(where).toArray(function (err, result) {
+                        if (err) throw err;
+                        resolve({ code: 0, data: result });
+                        db.close();
+                    });
+                } catch (error) {
+                    reject({ code: 1, error })
+                }
+
+            });
+        } else {
+            MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+                if (err) throw err;
+                var dbo = db.db(url.dbname);
+                try {
+                    dbo.collection(set).find(where).skip(num * page).limit(num).toArray(function (err, result) {
+                        if (err) throw err;
+                        resolve({ code: 0, data: result });
+                        db.close();
+                    });
+                } catch (error) {
+                    reject({ code: 1, error })
+                }
+
+            });
+        }
+
+    })
+}
+let update = async (set, where = {}, data, defin = true, url = dburl) => {
+    return new Promise((resolve, reject) => {
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            if (defin) {
+                data = { $set: data }
+            }
+            try {
+                dbo.collection(set).updateOne(where, data, function (err, res) {
+                    if (err) throw err;
+                    resolve({ code: 0 });
+                    db.close();
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+let updates = async (set, where = {}, data, url = dburl) => {
+    return new Promise((resolve, reject) => {
+        MongoClient.connect(url.url, { useUnifiedTopology: true, useNewUrlParser: true }, function (err, db) {
+            if (err) throw err;
+            var dbo = db.db(url.dbname);
+            data = { $set: data }
+            try {
+                dbo.collection(set).updateMany(where, data, function (err, res) {
+                    if (err) throw err;
+                    db.close();
+                    resolve({ code: 0, num: res.result.nModified });
+                });
+            } catch (error) {
+                reject({ code: 1, error })
+            }
+
+        });
+    })
+}
+
+module.exports = function (url, dbname) {
+    dburl = { url, dbname };
+    return {
+        add,
+        adds,
+        remove,
+        find,
+        update,
+        updates,
+        removes
+    }
+}

bin/router.js

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+const fs = require("fs")
+const os = require('os');
+
+function addMapping(router, mapping) {
+    for (var url in mapping) {
+        if (url.startsWith('GET ')) {
+            var path = url.substring(4);
+            router.get(path, mapping[url]);
+            console.log(`register URL mapping: GET ${path}`);
+        } else if (url.startsWith('POST ')) {
+            var path = url.substring(5);
+            router.post(path, mapping[url]);
+            console.log(`register URL mapping: POST ${path}`);
+        } else {
+            console.log(`invalid URL: ${url}`);
+        }
+    }
+}
+
+function addControllers(router, controllers_dir) {
+    let ostype = os.type() == "Windows_NT"
+    let dir;
+    if (ostype) {
+        dir = __dirname.replace("\\bin", "")
+    } else {
+        dir = __dirname.replace("/bin", "")
+    }
+
+    var files = fs.readdirSync(dir + "/" + controllers_dir);
+    var js_files = files.filter((f) => {
+        return f.endsWith('.js');
+    });
+
+    for (var f of js_files) {
+        // console.log(`process controller: ${f}...`);
+        let mapping = require(dir + `/${controllers_dir}/` + f);
+        addMapping(router, mapping);
+    }
+}
+module.exports = function (dir) {
+    let
+        controllers_dir = dir || 'controllers', // 如果不传参数，扫描目录默认为'controllers'
+        router = require('koa-router')();
+    addControllers(router, controllers_dir);
+    return router.routes();
+    // return 1;
+};

controllers/index.js

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+let index = async (ctx,next)=>{
+    ctx.body = ""
+}
+
+let login = async (ctx,next)=>{
+    let res = await dbs.find("user",{user: ctx.query.user,pwd: ctx.query.pwd})
+    if(res.data.length == 0){
+        ctx.body = JSON.stringify({
+            code: 500,
+            msg: "用户名或密码错误"
+        })
+    }else{
+        ctx.body = JSON.stringify({
+            code: 200,
+            msg: "登录成功",
+            data: {
+                username:res.data[0].user,
+                token:res.data[0]._id
+            }
+        })
+    }
+    
+}
+let register = async (ctx,next)=>{
+    const msg = dbs.add("user",{user: ctx.query.user,pwd: ctx.query.pwd})
+    ctx.body = JSON.stringify(msg)
+}
+let getlist = async (ctx,next)=>{
+    const list = await dbs.find("user")
+    ctx.body = JSON.stringify(list)
+}
+
+let deluser = async (ctx,next)=>{
+    const res = await dbs.remove("user",{num_key: parseInt(ctx.query.id)})
+    ctx.body = JSON.stringify({...res,id:ctx.query.id})
+
+}
+let update = async (ctx,nex)=>{
+    console.log(ctx.request.body)
+    const res = await dbs.update("user",{num_key: ctx.request.body.id},{user: ctx.request.body.user,pwd:ctx.request.body.pwd})
+    ctx.body = JSON.stringify(res)
+
+}
+
+module.exports = {
+    "GET /":index,
+    "GET /login": login,
+    "GET /register": register,
+    "GET /getlist": getlist,
+    "GET /deluser": deluser ,
+    "POST /update": update
+}

package.json

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+{
+  "name": "wecat-serve-demo",
+  "version": "1.0.0",
+  "main": "index.js",
+  "repository": "http://git.luyuan.tk/pplokijuhyg/wecat-serve-demo.git",
+  "author": "pplokijuhyg <1162963624@qq.com>",
+  "license": "MIT",
+  "scripts": {
+    "start": "node app.js"
+  },
+  "dependencies": {
+    "fs": "^0.0.1-security",
+    "koa": "^2.11.0",
+    "koa-bodyparser": "^4.2.1",
+    "koa-router": "^7.4.0",
+    "mongodb": "^3.3.5"
+  }
+}