Javascript connect modrewrite将我的POST请求更改为GET_Javascript_Node.js_Proxy_Connect Modrewrite

Javascript connect modrewrite将我的POST请求更改为GET

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Javascript connect modrewrite将我的POST请求更改为GET,javascript,node.js,proxy,connect-modrewrite,Javascript,Node.js,Proxy,Connect Modrewrite,我需要重定向一个POST请求，为了演示这个问题，我已经设置了2个nodejs服务器。一个提供一些HTML并进行修改，另一个在修改后接收帖子。第一个提供HTML并进行重写的程序如下所示： var connect = require('connect'); var cors = require('cors'); const modRewrite = require('connect-modrewrite') var http = require('http'); const { nextTick

我需要重定向一个POST请求，为了演示这个问题，我已经设置了2个nodejs服务器。一个提供一些HTML并进行修改，另一个在修改后接收帖子。第一个提供HTML并进行重写的程序如下所示：

var connect = require('connect');
var cors = require('cors');
const modRewrite = require('connect-modrewrite')

var http = require('http');
const { nextTick } = require('process');

var app = connect();

app.use(cors())


app.use('/test', function(req, res, next){
    res.end(`
        <!doctype html><html><body>

        <button type="button"class="yes">click</button>

        <script>
            async function postData (url = '', data = {}) {
                const response = await fetch(url, {
                    method: 'POST',
                    mode: 'cors',
                    cache: 'no-cache', 
                    credentials: 'same-origin',
                    headers: {
                        'Content-Type': 'application/json',
                        'Access-Control-Allow-Origin': '*',
                        'Access-Control-Allow-Methods': 'DELETE, POST, GET, OPTIONS'
                    },
                    redirect: 'follow', // manual, *follow, error
                    referrerPolicy: 'no-referrer', // no-referrer, *client
                    body: JSON.stringify(data)
                })
                return await response.json();
              }

              document.querySelector('.yes').addEventListener('click', () => {
                postData('http://localhost:3000/a/b', { answer: 42 }).then(data => {
                    console.log(data); 
                });
            });
        </script></body></html>`);
    });

    app.use(function(req, res, next){
        console.log('RECEIVED', req.method);
        next();
    });

    app.use(modRewrite([
        '^/(.*)$ http://localhost:4001/$1 [R, L]'
    ])
);

http.createServer(app).listen(3000);

因此，流程如下所示：

1) In the browser I do a fetch/POST
2) It is received as POST and connect-modrewrite is applied
3) My second backend prints: RECEIVED /a/b GET

所以我的问题是，为什么我的帖子被转换成GET，我该如何解决这个问题？

这是预期的行为。当您执行重定向（301/302）时，POST数据在重定向时被丢弃，因为客户端将对301指定的URL执行GET请求

为了解决这个问题，您应该使用重定向307。请参见以下参考：

1) In the browser I do a fetch/POST
2) It is received as POST and connect-modrewrite is applied
3) My second backend prints: RECEIVED /a/b GET