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?
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
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
其他回答
如果它涉及文件上传,浏览器通常以“multipart/form-data”内容类型发送它。 您可以在这种情况下使用它
var multipart = require('multipart');
multipart.parse(req)
参考1
参考2
在像这样的表单字段上
<input type="text" name="user[name]" value="MyName">
<input type="text" name="user[email]" value="myemail@somewherefarfar.com">
上面的一些答案会失败,因为它们只支持平面数据。
现在我正在使用Casey Chu的答案,但使用“qs”而不是“querystring”模块。这也是“体解析器”使用的模块。所以如果你想要嵌套数据,你必须安装qs。
npm install qs --save
然后像这样替换第一行:
//var qs = require('querystring');
var qs = require('qs');
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);
console.log(post.user.name); // should work
// use post['blah'], etc.
});
}
}
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)
});
对于任何想知道如何在不安装web框架的情况下完成这个微不足道的任务的人,我设法把它放在一起。几乎没有生产准备,但它似乎工作。
function handler(req, res) {
var POST = {};
if (req.method == 'POST') {
req.on('data', function(data) {
data = data.toString();
data = data.split('&');
for (var i = 0; i < data.length; i++) {
var _data = data[i].split("=");
POST[_data[0]] = _data[1];
}
console.log(POST);
})
}
}
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);
}
});
});
}