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/ answers: 1 / hits: 20043
/ 5 Years ago, thu, march 28, 2019, 12:00:00
I'm setting up a server to upload zip files from the client. The server runs with express and multer to do this. When uploading a file, the server throws a MulterError: Unexpected field error and I cannot figuere out what is cousing it.
I've tried with png images and It works just fine. But with the zip files it just doesn't work.
const multerConfig = {
//specify diskStorage (another option is memory)
storage: multer.diskStorage({
//specify destination
destination: function(req, file, next){
next(null, './public/zip-storage');
},
//specify the filename to be unique
filename: function(req, file, next){
console.log(file);
const ext = file.mimetype.split('/')[1];
//set the file fieldname to a unique name containing the original name, current datetime and the extension.
next(null, file.fieldname + '-' + Date.now() + '.'+ext);
}
}),
// filter out and prevent non-image files.
fileFilter: function(req, file, next){
if(!file){
next();
}
// only permit zip mimetypes
const zip = file.mimetype.startsWith('application');
if(zip){
console.log('zip uploaded');
next(null, true);
}else{
console.log(file not supported)
errorReq = true;
return next();
}
}
};
/* ROUTES
**********/
app.get('/', function(req, res){
res.render('index.html');
});
var errorDetection = function(){
if(!errorReq){
errorReq = false;
return('complete.html');
} else{
errorReq = false;
return('errorupload.html');
}
}
app.post('/upload', multer(multerConfig).single('photo'),function(req, res){
//Here is where I could add functions to then get the url of the new photo
//And relocate that to a cloud storage solution with a callback containing its new url
//then ideally loading that into your database solution. Use case - user uploading an avatar...
res.redirect('complete.html');
}
);
// RUN SERVER
app.listen(port,function(){
console.log(`Server listening on port ${port}`);
});
This is the error:
MulterError: Unexpected field
at wrappedFileFilter (/home/axentiva-miguel/Documentos/ServerAPP/node_modules/multer/index.js:40:19)
at Busboy.<anonymous> (/home/axentiva-miguel/Documentos/ServerAPP/node_modules/multer/lib/make-middleware.js:114:7)
at emitMany (events.js:147:13)
at Busboy.emit (events.js:224:7)
at Busboy.emit (/home/axentiva-miguel/Documentos/ServerAPP/node_modules/busboy/lib/main.js:38:33)
at PartStream.<anonymous> (/home/axentiva-miguel/Documentos/ServerAPP/node_modules/busboy/lib/types/multipart.js:213:13)
at emitOne (events.js:116:13)
at PartStream.emit (events.js:211:7)
at HeaderParser.<anonymous> (/home/axentiva-miguel/Documentos/ServerAPP/node_modules/dicer/lib/Dicer.js:51:16)
at emitOne (events.js:116:13)
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