Mar*_*ano 3 curl node.js express
当我curl -X POST -H "Content-Type:application/json" http://localhost:3000/messages -d '{"text":"Hi again, World"}'在 cURL 上对 Express 执行此请求时，出现此错误
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<pre>SyntaxError: Unexpected token ' in JSON at position 0<br> at JSON.parse (<anonymous>)<br> at createStrictSyntaxError (C:\Users\Atom\node_modules\body-parser\lib\types\json.js:158:10)<br> at parse (C:\Users\Atom\node_modules\body-parser\lib\types\json.js:83:15)<br> at C:\Users\Atom\node_modules\body-parser\lib\read.js:121:18<br> at invokeCallback (C:\Users\Atom\node_modules\raw-body\index.js:224:16)<br> at done (C:\Users\Atom\node_modules\raw-body\index.js:213:7)<br> at IncomingMessage.onEnd (C:\Users\Atom\node_modules\raw-body\index.js:273:7)<br> at IncomingMessage.emit (events.js:327:22)<br> at endReadableNT (internal/streams/readable.js:1327:12)<br> at processTicksAndRejections (internal/process/task_queues.js:80:21)</pre>
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我不知道我做错了什么，因为我只是复制粘贴本教程中的内容。我进行了搜索，在curl请求上找不到任何语法错误，但这仍然是错误的原因，我知道'是单引号(')。任何帮助将不胜感激。我的 app.js 文件：
var express = require('express');
var app = express();
const { v4: uuidv4 } = require('uuid');
require('dotenv').config();
app.use(express.json());
app.use(express.urlencoded({ extended: true }));
let users = {
1: {
id: '1',
username: 'Robin Wieruch',
},
2: {
id: '2',
username: 'Dave Davids',
},
};
let messages = {
1: {
id: '1',
text: 'Hello World',
userId: '1',
},
2: {
id: '2',
text: 'By World',
userId: '2',
},
};
app.get('/users', (req, res) => {
return res.send(Object.values(users));
});
app.get('/users/:userId', (req, res) => {
return res.send(users[req.params.userId]);
});
app.post('/messages', (req, res) => {
const id = uuidv4();
const message = {
id,
text: req.body.text
};
messages[id] = message;
return res.send(message);
});
app.get('/messages', (req, res) => {
return res.send(Object.values(messages));
});
app.get('/messages/:messageId', (req, res) => {
return res.send(messages[req.params.messageId]);
});
app.post('/users', (req, res) => {
return res.send('POST HTTP method on user resource');
});
app.put('/users/:userId', (req, res) => {
return res.send(
`PUT HTTP method on user/${req.params.userId} resource`,
);
});
app.delete('/users/:userId', (req, res) => {
return res.send(
`DELETE HTTP method on user/${req.params.userId} resource`,
);
});
app.listen(process.env.PORT, () =>
console.log(`Example app listening on port ${process.env.PORT}!`),
);
进一步的调查表明，如果您使用的是 Windows cmd 终端，您可能需要转义双引号并避免单引号，因此例如在 git bash 上，以下工作
curl -X POST -H "Content-Type:application/json" -d '{"route": "Test route"}' http://192.168.1.xx:xxxx/
但在 Windows cmd 上不行。为此我使用了：
curl -X POST -H "Content-Type:application/json" -d "{\"route\": \"Test route\"}" http://192.168.1.xx:xxxx/
注意将xx xxxx改为你自己的url、端口
此见解的来源是 https://github.com/biofects/Google-Home-Messages/issues/3
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