我尝试使用node.js设置一个API,并在我的app.js类中处理请求错误,如果出现问题我会返回404,现在这就是我的问题,我看不到我如何请求任何东西错误,我仍然收到 404 错误,我尝试向我的 API 发送一个发布请求,如下所示:
{
"name":"Harry Potter 5",
"price":"12.99"
}
然后我明白了
这是我的 app.js
const express = require('express');
const app = express();
const morgan = require('morgan');
const productRoutes = require('./api/routes/product');
const orderRoutes = require('./api/routes/order');
const bodyParser = require('body-parser');
app.use(morgan('dev'));
app.use(bodyParser.urlencoded({
extended:false
}));
app.use(bodyParser.json());
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.use('/products', productRoutes);
app.use('/orders', orderRoutes);
module.exports = app;
这是我的product.js
const express = require('express');
const router = express.Router();
router.get('/', (req, res, next) => {
res.status(200).json({
message: 'Handling GET requests to /products'
});
});
router.post('/', (req, res, next) => {
const product = {
name: req.body.name,
price: req.body.price
};
res.status(201).json({
message: 'Handling POST requests to /products',
createdProduct: product
});
});
router.get('/:productId', (req, res, next) => {
const id = req.params.productId;
if (id === 'special') {
res.status(200).json({
message: 'You discovered the special ID',
id: id
});
} else {
res.status(200).json({
message: 'You passed an ID'
});
}
});
router.patch('/:productId', (req, res, next) => {
res.status(200).json({
message: 'Updated product!'
});
});
router.delete('/:productId', (req, res, next) => {
res.status(200).json({
message: 'Deleted product!'
});
});
module.exports = router;
最佳答案
这是因为您将所有内容都设置为错误:)
请参阅 here 中的文档- 来自提供的链接:
Writing error handlers Define error-handling middleware functions in the same way as other middleware functions, except error-handling functions have four arguments instead of three: (err, req, res, next). For example:
// pay attention to err param app.use(function (err, req, res, next) { console.error(err.stack)` res.status(500).send('Something broke!') })
在您的代码中,您有以下内容:
app.use((req, res, next) => {
const error = new Error("Not found");
error.status = 404;
next(error);
});
它告诉express每个请求都应该用404响应。您应该将其设置为适当的错误处理程序,或者将其删除。
关于javascript - 尝试发送 POST 请求时收到 404 错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/53806322/