problem description
when uploading multiple files using formidable, there is always one more empty file, as shown in the following figure
so the traversal file stream is printed out, and sure enough, it is looped three times, and the code is as follows:
related codes
var form = new formidable.IncomingForm();
form.uploadDir = "public" + AVATAR_UPLOAD_FOLDER; //
form.keepExtensions = true; //
form.maxFieldsSize = 2 * 1024 * 1024; //
var newPath;
var allFile=[];
form.on("file", function (filed, file) {
console.log("filed:::",filed);
console.log("file:::",file);
allFile.push([filed, file]);//
// console.log("**********=>allFile:",allFile);
}).parse(req, function (err, fields, files) {
var extName = ""; //
if(files.file && files.file.length>0){
console.log("0");
switch (files.file.type) {
case "image/pjpeg":
extName = "jpg";
break;
case "image/jpeg":
extName = "jpg";
break;
case "image/png":
extName = "png";
break;
case "image/x-png":
extName = "png";
break;
}
if (extName.length == 0) {
res.locals.error = "pngjpg";
res.render("index", {title: TITLE});
return;
}
allFile.forEach(function(file,index){
var fieldName=file[0];
var types = file[1].name.split(".");
var date = new Date();
var ms = Date.parse(date);
fs.renameSync(file[1].path,form.uploadDir+"/"+types[0]+"."+String(types[types.length-1]));//
});
}
})
the following is the printout:
filed::: file
file::: File {
_events: {},
_eventsCount: 0,
_maxListeners: undefined,
size: 0,
path: "public\\avatar\\upload_255fc288f22bda9c2e6f3f985c353609",
name: "",
type: "application/octet-stream",
hash: null,
lastModifiedDate: null,
_writeStream:
WriteStream {
_writableState:
WritableState {
objectMode: false,
highWaterMark: 16384,
finalCalled: true,
needDrain: false,
ending: true,
ended: true,
finished: true,
destroyed: true,
decodeStrings: true,
defaultEncoding: "utf8",
length: 0,
writing: false,
corked: 0,
sync: true,
bufferProcessing: false,
onwrite: [Function: bound onwrite],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 0,
prefinished: true,
errorEmitted: false,
emitClose: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] },
writable: false,
_events: { open: [Function] },
_eventsCount: 1,
_maxListeners: undefined,
path: "public\\avatar\\upload_255fc288f22bda9c2e6f3f985c353609",
fd: null,
flags: "w",
mode: 438,
start: undefined,
autoClose: true,
pos: undefined,
bytesWritten: 0,
closed: false } }
filed::: file
file::: File {
_events: {},
_eventsCount: 0,
_maxListeners: undefined,
size: 16144,
path:
"public\\avatar\\upload_5427e66c7f095253103cf435ca326903.png",
name: "1506492549107.png",
type: "image/png",
hash: null,
lastModifiedDate: 2018-09-06T07:32:45.571Z,
_writeStream:
WriteStream {
_writableState:
WritableState {
objectMode: false,
highWaterMark: 16384,
finalCalled: true,
needDrain: false,
ending: true,
ended: true,
finished: true,
destroyed: true,
decodeStrings: true,
defaultEncoding: "utf8",
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function: bound onwrite],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 0,
prefinished: true,
errorEmitted: false,
emitClose: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] },
writable: false,
_events: {},
_eventsCount: 0,
_maxListeners: undefined,
path:
"public\\avatar\\upload_5427e66c7f095253103cf435ca326903.png",
fd: null,
flags: "w",
mode: 438,
start: undefined,
autoClose: true,
pos: undefined,
bytesWritten: 16144,
closed: false } }
filed::: file
file::: File {
_events: {},
_eventsCount: 0,
_maxListeners: undefined,
size: 18898,
path:
"public\\avatar\\upload_75052b6e88a8a2a04c3e98090b577dfd.png",
name: "1506492173800.png",
type: "image/png",
hash: null,
lastModifiedDate: 2018-09-06T07:32:45.575Z,
_writeStream:
WriteStream {
_writableState:
WritableState {
objectMode: false,
highWaterMark: 16384,
finalCalled: true,
needDrain: true,
ending: true,
ended: true,
finished: true,
destroyed: true,
decodeStrings: true,
defaultEncoding: "utf8",
length: 0,
writing: false,
corked: 0,
sync: false,
bufferProcessing: false,
onwrite: [Function: bound onwrite],
writecb: null,
writelen: 0,
bufferedRequest: null,
lastBufferedRequest: null,
pendingcb: 0,
prefinished: true,
errorEmitted: false,
emitClose: false,
bufferedRequestCount: 0,
corkedRequestsFree: [Object] },
writable: false,
_events: {},
_eventsCount: 0,
_maxListeners: undefined,
path:
"public\\avatar\\upload_75052b6e88a8a2a04c3e98090b577dfd.png",
fd: null,
flags: "w",
mode: 438,
start: undefined,
autoClose: true,
pos: undefined,
bytesWritten: 18898,
closed: false } }