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POST from react.js reaches node/js server as GET
P粉316423089
P粉316423089 2024-04-03 17:22:04
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It appears that my POST request is being converted to GET somewhere in my REACT client code. This is the reaction code: 

function SavePatient(event) {

  event.preventDefault();
  console.log("Saving Patient Data");
  console.log(patientData);

  fetch('http://localhost:3001',
  {
    Method: 'POST',
    Headers: {
      'Accept': 'application/json',
      'Content-Type': 'multipart/form-data'
    },
    Body: JSON.stringify(patientData),
    Cache: 'default'
  });

This is the server code: 

function requestListener(req,res) {

    res.setHeader('Access-Control-Allow-Origin', '*'); 
    res.setHeader( 'Access-Control-Allow-Headers',
                    'Origin, X-Requested-With, Content-Type, Accept');

    console.log(req.url,req.method,req.headers);
    // console.log(req);
    //process.exit();

    const url = req.url;
    const body = [];
    let parsedBody = "";

    function readData(chunk) {
        console.log(chunk);
        body.push(chunk);
    }

    function endReadData(chunk) {
        parsedBody = Buffer.concat(body).toString();
        console.log(parsedBody);
    }

    if (url === '/savepatient') {
        const body = [];
        req.on('data', readData);
        req.on('end', endReadData); 
        res.setHeader('Content-Type', 'text/json');
        res.setHeader('Access-Control-Allow-Origin', '*'); 
        res.setHeader( 'Access-Control-Allow-Headers',
                        'Origin, X-Requested-With, Content-Type, Accept');
        res.write('{"name":"John", "age":30, "car":null}');
        console.log('Saving...');
        fs.writeFileSync('storage/message.txt','TESTE');
        return res.end();
    }
    // console.log('Aqui')
    // res.setHeader('Content-Type', 'text/html');
    // res.write('<html>');
    // res.write('<head><title>MEDPRO.app server</title></head>');
    // res.write('<body><h1>Hello from the MEDPRO.app server!</h1></body>');
    // res.write('</html>');
    // res.end();
}

The server code works fine and I receive the POST request normally using Postman. The problem is that when I send the request from the client using fetch... it arrives as POST... very strange.

I expected the POST request to reach the server.

Can be found using the Postman test server.

For my client, this is the message the server receives:

/Obtain{ host: 'localhost:3001', connection: "keep alive", 'sec-ch-ua': '"Chromium";v="112", "Google Chrome";v="112", "Not:A-Brand";v="99"', 'sec-ch-ua-mobile': '?0', 'user-agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, such as Gecko) Chrome/112.0.0.0 Safari/537.36',

'sec-ch-ua-platform': '"Windows"', accept:'/', Source: 'http://localhost:3000', 'sec-fetch-site': 'Same site', 'sec-fetch-mode': 'cors', 'sec-fetch-dest': 'empty', Cited by: 'http://localhost:3000/', 'Accept encoding': 'gzip, deflate, br', 'Receptive language': 'en,en-US;q=0.9,es;q=0.8,pt-BR;q=0.7,pt;q=0.6' }

P粉316423089
P粉316423089

reply all(1)
P粉116631591
P粉1166315912024-04-04 00:22:48 1 floor

Try setting everything to lowercase in the fetch method; this should do the trick as it is case sensitive.

like this:

function SavePatient(event) {

  event.preventDefault();
  console.log("Saving Patient Data");
  console.log(patientData);

  fetch('http://localhost:3001',
  {
    method: 'POST',
    headers: {
      'Accept': 'application/json',
      'Content-Type': 'multipart/form-data'
    },
    body: JSON.stringify(patientData),
    cache: 'default'
  });
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