Node.js 开发Rest的Api示例项目（二）

app.js

      'use strict';
      console.log('Hello world');
      const Koa = require('koa');
      const bodyParser = require('koa-bodyparser');
      const app = new Koa();
      const controller = require('./controller');
      // parse request body:
      app.use(bodyParser());
      // add controller:
      app.use(controller());
      app.listen(5000);
      console.log('app started at port 5000...');
  
 

controller.js

      const fs = require('fs');
      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) {
         var fs = require('fs');
         var files = fs.readdirSync(__dirname + '\\controllers');
         var js_files = files.filter((f) => {
             return f.endsWith('.js');
          });
         for (var f of js_files) {
             console.log(`process controller: ${f}...`);
             let mapping = require(__dirname + '\\controllers\\' + 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();
      };
  
 

  
 
 

controllers文件夹下的接口接口文件：

./controllers/hello.js

      'use strict'
      module.exports = {
          'POST /hello/:name': async (ctx, next) => {
              var name = ctx.request.body.name || '';
              ctx.response.body = `<h1>Hello post, ${name}!</h1>`;
          }
      };
  
 

./controllers/index.js

      'use strict'
      var fn_index = async (ctx, next) => {
          ctx.response.body = `<h1>Index</h1>
       <form action="/signin" method="post">
       <p>Name: <input name="name" value="koa"></p>
       <p>Password: <input name="password" type="password"></p>
       <p><input type="submit" value="Submit"></p>
       </form>`;
      };
      var fn_signin = async (ctx, next) => {
         var
              name = ctx.request.body.name || '',
              password = ctx.request.body.password || '';
         console.log(`signin with name: ${name}, password: ${password}`);
         if (name === 'koa' && password === '12345') {
              ctx.response.body = `<h1>Welcome, ${name}!</h1>`;
          } else {
              ctx.response.body = `<h1>Login failed!</h1>
       <p><a href="/">Try again</a></p>`;
          }
      };
      module.exports = {
         'GET /': fn_index,
         'POST /signin': fn_signin
      };
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/79305544