我觉得我已经尝试了一切,希望有一些新鲜的眼睛来看待我的问题。正如标题所暗示的那样,我正在向运行 express 的 NodeJS 服务器发送一个 http post 请求,nodeJS 返回未定义/空的req.body
。
NodeJS Express Code:
const express = require('express');
const path = require('path');
const app = express();
const PORT = process.env.PORT || 5000;
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With,
Content-Type, Accept");
next();
});
app.post('/addComment', (req, res) => {
console.log(req.body);
});
app.listen(PORT, () => console.log(`Listening on ${ PORT }`));
Javascript 浏览器代码:
let data = {name: 'aName'};
fetch('http://localhost:5000/addComment', {
method: 'post',
body: JSON.stringify(data)
});
你必须使用body-parser
中间件:
const bodyParser = require('body-parser')
app.use(bodyParser.urlencoded({ extended: false }))
app.use(bodyParser.json());
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With,
Content-Type, Accept");
next();
});
app.post('/addComment', (req, res) => {
console.log(req.body);
});
app.listen(PORT, () => console.log(`Listening on ${ PORT }`));
请参阅正文解析器。
如果您使用的是最新的 express,则实际上可以使用 do
const express = require('express');
const path = require('path');
const app = express();
const PORT = process.env.PORT || 5000;
app.use(express.json())
app.use (express.urlencoded({extended: false}))
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With,
Content-Type, Accept");
next();
});
app.post('/addComment', (req, res) => {
console.log(req.body);
});
app.listen(PORT, () => console.log(`Listening on ${ PORT }`));
由于大众需求,Express 现在默认捆绑了正文解析器。