javascript - 使用Node.js和Express进行POST时如何访问请求体？(How to access the request body when POSTing using Node.js and Express?)

Question

I have the following Node.js code:

(我有以下Node.js代码：)

var express = require('express');
var app = express.createServer(express.logger());
app.use(express.bodyParser());

app.post('/', function(request, response) {
    response.write(request.body.user);
    response.end();
});

Now if I POST something like:

(现在，如果我发布类似的东西：)

curl -d user=Someone -H Accept:application/json --url http://localhost:5000

I get Someone as expected.

(我按预期得到了Someone 。)

Now, what if I want to get the full request body?

(现在，如果我想获得完整的请求体，该怎么办？)

I tried doing response.write(request.body) but Node.js throws an exception saying " first argument must be a string or Buffer " then goes to an "infinite loop" with an exception that says " Can't set headers after they are sent. ";

(我尝试做response.write(request.body)但是Node.js抛出一个异常，说“ 第一个参数必须是一个字符串或缓冲区 ”然后进入“无限循环”，异常是“ 无法在它们之后设置标题 ” 发送。 “;)

this also true even if I did var reqBody = request.body;

(即使我做了var reqBody = request.body;这也是如此var reqBody = request.body;)

and then writing response.write(reqBody) .

(然后编写response.write(reqBody) 。)

What's the issue here?

(这是什么问题？)

Also, can I just get the raw request without using express.bodyParser() ?

(另外，我可以在不使用express.bodyParser()情况下获取原始请求吗？)

  ask by TheBlueSky translate from so

Answer 1

Express 4.0 and above:(Express 4.0及以上版本：)

$ npm install --save body-parser

And then in your node app:

(然后在您的节点应用程序中：)

const bodyParser = require('body-parser');
app.use(bodyParser);

---

Express 3.0 and below:(Express 3.0及以下版本：)

Try passing this in your cURL call:

(尝试在你的cURL调用中传递它：)

--header "Content-Type: application/json"

and making sure your data is in JSON format:

(并确保您的数据是JSON格式：)

{"user":"someone"}

Also, you can use console.dir in your node.js code to see the data inside the object as in the following example:

(此外，您可以在node.js代码中使用console.dir来查看对象内的数据，如以下示例所示：)

var express = require('express');
var app = express.createServer();

app.use(express.bodyParser());

app.post('/', function(req, res){
    console.dir(req.body);
    res.send("test");
}); 

app.listen(3000);

This other question might also help: How to receive JSON in express node.js POST request?

(这个问题也可能会有所帮助： 如何在express node.js POST请求中接收JSON？)

If you don't want to use the bodyParser check out this other question: https://stackoverflow.com/a/9920700/446681

(如果你不想使用bodyParser，请查看另一个问题： https ：//stackoverflow.com/a/9920700/446681)