NodeJS Knox Formidable führt zu einem 400, File not Uploaded to S3 Bucket

Ich konnte meinen Code nicht mit Knox zum Laufen bringen, ich bekam immer einen 400 statusCode und meine Dateien wurden nicht auf S3 hochgeladen. Also habe ich aws-sdk verwendet und es hat wie von Zauberhand funktioniert. Meine Dateien werden hochgeladen und in meiner Mongo-Datenbank gespeichert. Für diejenigen, die auf dasselbe Problem stoßen könnten, habe ich Folgendes getan:

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);
};