NodeJS Knox Formidabelt resultat i en 400, fil som inte laddas upp till S3 Bucket

Jag kunde inte få min kod att fungera med knox, jag fick hela tiden en 400 statuskod och mina filer laddades inte upp till S3. Så jag använde aws-sdk och det fungerade som magi. Mina filer laddas upp och sparas i min mongodatabas. För de som kanske stöter på samma problem, så här gjorde jag:

const { config } = require("aws-sdk");

module.exports = (express, app, formidable, fs, os, gm, s3, mongoose, io) => {
  //os.tmpDir = os.tmpdir;
  let Socket;

  io.on("connection", function (socket) {
    Socket = socket;
  });

  const singleImage = new mongoose.Schema({
    filename: {
      type: String,
      require: true,
    },
    votes: {
      type: Number,
      require: true,
    },
  });

  let singleImageModel = mongoose.model("singleImage", singleImage);
  let router = express.Router();

  router.get("/", function (req, res, next) {
    res.render("index", { host: app.get("host") });
  });

  router.post("/upload", function (req, res, next) {
    // File upload

    function generateFilename(filename) {
      let ext_regex = /(?:\.([^.]+))?$/;
      let ext = ext_regex.exec(filename)[1];
      let date = new Date().getTime();
      let charBank = "abcdefghijklmnopqrstuvwxyz";
      let fstring = "";
      for (let i = 0; i < 15; i++) {
        fstring += charBank[parseInt(Math.random() * 26)];
      }
      return (fstring += date + "." + ext);
    }

    let tmpFile, nFile, fName;
    let newForm = new formidable.IncomingForm();
    newForm.keepExtensions = true;
    newForm.parse(req, function (err, fields, files) {
      tmpFile = files.upload.path;
      fName = generateFilename(files.upload.name);
      nFile = os.tmpDir() + "\\" + fName;
      res.writeHead(200, { "Content-type": "image/JPG" });
      res.end();
    });

    newForm.on("end", function () {
      fs.rename(tmpFile, nFile, function () {
        // Resize the image and upload this file into the S3 bucket
        gm(nFile)
          .resize(300)
          .write(nFile, function () {
            // Upload to the S3 Bucket
            /* fs.readFile(nFile, function (err, buf) {
              let req = knoxClient.put(fName, {
                "Content-Length": buf.length,
                "Content-Type": "image/JPG",
                "x-amz-acl": "public-read",
              }); */

            const fileContent = fs.readFileSync(nFile);

            const params = {
              Bucket: require("../config").S3Bucket,
              Key: fName,
              Body: fileContent,
            };

            s3.upload(params, function (err, data) {
              // Delete the Local file
              fs.unlink(nFile, function (err) {
                console.log("Local file deleted!");
                if (err) {
                  console.error(err);
                }
              });
              console.log("PRINT FILE: ", fName);
              if (err) {
                console.log("ERROR MSG: ", err);
                res.status(500).send(err);
              } else {
                //This means that the file is in the S3 Bucket
                console.log(fName + " is in the S3 bucket");

                let newImage = new singleImageModel({
                  filename: fName,
                  votes: 0,
                }).save();

                Socket.emit("status", { msg: "Saved!!", delay: 3000 });
                Socket.emit("doUpdate", {});

                res.status(200).end();
              }
            });

            /*               req.on("response", function (res) {
                if (res.statusCode == 200) {
                  

                } else {
                  console.log(
                    err +
                      fName +
                      " did not get to the database or S3 bucket so " +
                      nFile +
                      " was not deleted " +
                      res.statusCode
                  );
                  console.log(res.statusMessage);
                }
              }); */

            // req.end(buf);
            //     });
          });
      });
    });
  });

  app.use("/", router);
};