【发布时间】：2019-11-07 22:21:03
【问题描述】：
我写了一个GET API 打印传递的参数：
exports.agency_information = (req, res, next) => {
console.log({param: req.params.usercode});
};
这是router：
const router = require('express').Router();
const AgencyController = require('../controllers/agency');
router.get('/:usercode', AgencyController.agency_information);
module.exports = router;
但我不明白为什么当我调用 api 时总是返回 200 OK 而在 Postman 中这是返回：
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<meta name="theme-color" content="#000000" />
<meta name="description" content="Fare la constatazione amichevole non è mai stato così facile" />
<link rel="apple-touch-icon" href="logo192.png" />
<link rel="manifest" href="/manifest.json" />
<title>ConstaFAST</title>
<link href="/static/css/2.0624914a.chunk.css" rel="stylesheet">
<link href="/static/css/main.02a2fc0a.chunk.css" rel="stylesheet">
</head>
<body><noscript>You need to enable JavaScript to run this app.</noscript>
<div id="root"></div>
<script>
!function(i){function e(e){for(var r,t,n=e[0],o=e[1],u=e[2],l=0,f=[];l<n.length;l++)t=n[l],Object.prototype.hasOwnProperty.call(p,t)&&p[t]&&f.push(p[t][0]),p[t]=0;for(r in o)Object.prototype.hasOwnProperty.call(o,r)&&(i[r]=o[r]);for(s&&s(e);f.length;)f.shift()();return c.push.apply(c,u||[]),a()}function a(){for(var e,r=0;r<c.length;r++){for(var t=c[r],n=!0,o=1;o<t.length;o++){var u=t[o];0!==p[u]&&(n=!1)}n&&(c.splice(r--,1),e=l(l.s=t[0]))}return e}var t={},p={1:0},c=[];function l(e){if(t[e])return t[e].exports;var r=t[e]={i:e,l:!1,exports:{}};return i[e].call(r.exports,r,r.exports,l),r.l=!0,r.exports}l.m=i,l.c=t,l.d=function(e,r,t){l.o(e,r)||Object.defineProperty(e,r,{enumerable:!0,get:t})},l.r=function(e){"undefined"!=typeof Symbol&&Symbol.toStringTag&&Object.defineProperty(e,Symbol.toStringTag,{value:"Module"}),Object.defineProperty(e,"__esModule",{value:!0})},l.t=function(r,e){if(1&e&&(r=l(r)),8&e)return r;if(4&e&&"object"==typeof r&&r&&r.__esModule)return r;var t=Object.create(null);if(l.r(t),Object.defineProperty(t,"default",{enumerable:!0,value:r}),2&e&&"string"!=typeof r)for(var n in r)l.d(t,n,function(e){return r[e]}.bind(null,n));return t},l.n=function(e){var r=e&&e.__esModule?function(){return e.default}:function(){return e};return l.d(r,"a",r),r},l.o=function(e,r){return Object.prototype.hasOwnProperty.call(e,r)},l.p="/";var r=this.webpackJsonpwww=this.webpackJsonpwww||[],n=r.push.bind(r);r.push=e,r=r.slice();for(var o=0;o<r.length;o++)e(r[o]);var s=n;a()}([])
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<script src="/static/js/2.9ed2bde4.chunk.js"></script>
<script src="/static/js/main.ea8659b8.chunk.js"></script>
</body>
</html>
无论有无任何参数，结果都是一样的。
服务器代码
const express = require('express');
const app = express();
const path = require('path');
const morgan = require('morgan');
const bodyParser = require('body-parser');
const mongoose = require('mongoose');
require('dotenv').config()
const agencyRoutes = require('./api/routes/agency');
const companyRoutes = require('./api/routes/company');
const port = process.env.PORT || 3000;
mongoose.connect(process.env.DB_CONNECT, {
useCreateIndex: true,
useNewUrlParser: true,
useUnifiedTopology: true
}, () => console.log('Connect to the database'));
mongoose.Promise = global.Promise;
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use( (req, res, next) => {
res.header('Access-Control-Allow-Origin', '*');
res.header(
'Access-Control-Allow-Headers',
'Origin, X-Requested-With, Content-Type, Accept, Authorization'
);
if ( req.method === 'OPTIONS' ) {
res.header('Access-Control-Allow-Methods', 'PUT, POST, PATCH, DELETE, GET');
return res.status(200).json({});
}
next();
});
app.use(express.static(path.resolve(__dirname, '../www', 'build')));
app.get('*', (req, res) => {
res.sendFile(path.resolve(__dirname, '../www', 'build', 'index.html'));
});
app.use('/api/agency', agencyRoutes);
app.use('/api/company', companyRoutes);
app.use( (req, res, next) => {
const error = new Error('Not found');
error.status = 404;
next(error);
});
app.use( (error, req, res, next) => {
res.status(error.status || 500);
res.json({
error: {
message: error.message
}
});
});
app.listen(port, () => console.log(`Server up and running on port ${port}`));
【问题讨论】：