如何处理POST数据在Node.js?

如何从Node.js中的HTTP post方法中提取表单数据(form[method="post"])和文件上传?

我看了文件，谷歌了一下，什么都没找到。

function (request, response) {
    //request.post????
}

有图书馆或黑客吗?

当前回答

您需要使用请求以块的形式接收POST数据。On ('data'， function(chunk){…})

const http = require('http');

http.createServer((req, res) => {
    if (req.method == 'POST') {
        whole = ''
        req.on('data', (chunk) => {
            # consider adding size limit here
            whole += chunk.toString()
        })

        req.on('end', () => {
            console.log(whole)
            res.writeHead(200, 'OK', {'Content-Type': 'text/html'})
            res.end('Data received.')
        })
    }
}).listen(8080)

你应该考虑像jh建议的那样在指定位置增加一个尺寸限制。

2016-07-17 13:10:57

其他回答

如果你使用Express (Node.js的高性能、高级web开发)，你可以这样做:

HTML:

<form method="post" action="/">
    <input type="text" name="user[name]">
    <input type="text" name="user[email]">
    <input type="submit" value="Submit">
</form>

API客户端:

fetch('/', {
    method: 'POST',
    headers: {
        'Content-Type': 'application/json'
    },
    body: JSON.stringify({
        user: {
            name: "John",
            email: "john@example.com"
        }
    })
});

Node.js:(自Express v4.16.0起)

// Parse URL-encoded bodies (as sent by HTML forms)
app.use(express.urlencoded());

// Parse JSON bodies (as sent by API clients)
app.use(express.json());

// Access the parse results as request.body
app.post('/', function(request, response){
    console.log(request.body.user.name);
    console.log(request.body.user.email);
});

Node.js:(对于Express <4.16.0)

const bodyParser = require("body-parser");

/** bodyParser.urlencoded(options)
 * Parses the text as URL encoded data (which is how browsers tend to send form data from regular forms set to POST)
 * and exposes the resulting object (containing the keys and values) on req.body
 */
app.use(bodyParser.urlencoded({
    extended: true
}));

/**bodyParser.json(options)
 * Parses the text as JSON and exposes the resulting object on req.body.
 */
app.use(bodyParser.json());

app.post("/", function (req, res) {
    console.log(req.body.user.name)
});

2010-11-28 10:45:30

你可以使用querystring模块:

var qs = require('querystring');

function (request, response) {
    if (request.method == 'POST') {
        var body = '';

        request.on('data', function (data) {
            body += data;

            // Too much POST data, kill the connection!
            // 1e6 === 1 * Math.pow(10, 6) === 1 * 1000000 ~~~ 1MB
            if (body.length > 1e6)
                request.connection.destroy();
        });

        request.on('end', function () {
            var post = qs.parse(body);
            // use post['blah'], etc.
        });
    }
}

现在，例如，如果你有一个名为age的输入字段，你可以使用变量post访问它:

console.log(post.age);

2010-11-30 02:44:51

有很多种方法。然而，我所知道的最快的方法是使用带有body-parser的Express.js库。

var express = require("express");
var bodyParser = require("body-parser");
var app = express();

app.use(bodyParser.urlencoded({extended : true}));

app.post("/pathpostdataissentto", function(request, response) {
  console.log(request.body);
  //Or
  console.log(request.body.fieldName);
});

app.listen(8080);

这可以用于字符串，但我要更改bodyParser。urlencoded to bodyParser。如果POST数据包含json数组，则改为json。

更多信息:http://www.kompulsa.com/how-to-accept-and-parse-post-requests-in-node-js/

2015-11-03 22:25:42

要详细说明使用URLSearchParams:

Node.js知识:如何读取POST数据? 类:URLSearchParams .js文档 MDN: URLSearchParams

const http = require('http');

const POST_HTML =
  '<html><head><title>Post Example</title></head>' +
  '<body>' +
  '<form method="post">' +
  'Input 1: <input name="input1"><br>' +
  'Input 2: <input name="input2"><br>' +
  'Input 1: <input name="input1"><br>' +
  '<input type="submit">' +
  '</form>' +
  '</body></html>';

const FORM_DATA = 'application/x-www-form-urlencoded';

function processFormData(body) {
  const params = new URLSearchParams(body);

  for ([name, value] of params.entries()) console.log(`${name}: ${value}`);
}

// req: http.IncomingMessage
// res: http.ServerResponse
//
function requestListener(req, res) {
  const contentType = req.headers['content-type'];
  let body = '';

  const append = (chunk) => {
    body += chunk;
  };
  const complete = () => {
    if (contentType === FORM_DATA) processFormData(body);

    res.writeHead(200);
    res.end(POST_HTML);
  };

  req.on('data', append);
  req.on('end', complete);
}

http.createServer(requestListener).listen(8080);

$ node index.js
input1: one
input2: two
input1: three

2022-05-22 15:40:17

您可以使用“request - Simplified HTTP client”和Javascript Promise轻松地发送和获取POST请求的响应。

var request = require('request');

function getData() {
    var options = {
        url: 'https://example.com',
        headers: {
            'Content-Type': 'application/json'
        }
    };

    return new Promise(function (resolve, reject) {
        var responseData;
        var req = request.post(options, (err, res, body) => {
            if (err) {
                console.log(err);
                reject(err);
            } else {
                console.log("Responce Data", JSON.parse(body));
                responseData = body;
                resolve(responseData);
            }
        });
    });
}

2019-01-23 07:27:38

如何处理POST数据在Node.js?

推荐文章

最新文章

标签