问题
I have problem upload file nodejs. i have read stack1 and stack2. but i think this different case on terminal output like this :
> Unhandled rejection Error: EXDEV: cross-device link not permitted,
> rename '/tmp/31941-53enly.png' ->
> 'public/files/complaint/Screenshot_2016-05-01_01-16-55.png'
> at Error (native)
> at Object.fs.renameSync (fs.js:681:18)
> at null.<anonymous> (/home/faris/myprojects/orchestrale-server/routes/complaintimage.js:163:20)
> at tryCatcher (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/util.js:16:23)
> at Promise._settlePromiseFromHandler (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:502:31)
> at Promise._settlePromise (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:559:18)
> at Promise._settlePromise0 (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:604:10)
> at Promise._settlePromises (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/promise.js:683:18)
> at Async._drainQueue (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/async.js:138:16)
> at Async._drainQueues (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/async.js:148:10)
> at Immediate.Async.drainQueues [as _onImmediate] (/home/faris/myprojects/orchestrale-server/node_modules/sequelize/node_modules/bluebird/js/release/async.js:17:14)
> at processImmediate [as _immediateCallback] (timers.js:383:17)
my code :
if (_.isEmpty(req.files) == false) {
var tp = avatar_folder+req.files.file.name;
fs.renameSync(req.files.file.path, tp, function(err){});
var avatar = req.files.file.name;
}
code work on another distro like elementary os, but when i run project on debian jessie or ubuntu 16 LTS that error result on terminal.
any body can't help ? that code just run perfectly on elementary os and arch.
回答1:
Same problem. Workaround: Read the temp file, write the file in new location and remove the temp file:
// Read the file
fs.readFile(oldpath, function (err, data) {
if (err) throw err;
console.log('File read!');
// Write the file
fs.writeFile(newpath, data, function (err) {
if (err) throw err;
res.write('File uploaded and moved!');
res.end();
console.log('File written!');
});
// Delete the file
fs.unlink(oldpath, function (err) {
if (err) throw err;
console.log('File deleted!');
});
});
回答2:
You can use 'mv' packgage to resolve this issue Link NPM: https://www.npmjs.com/package/mv How to use:
Replace some old code with fs.rename:
fs.rename(temp_path, target_path, (err) => {
if (err) {
console.log('> FileServer.jsx | route: "/files/upload" | err:', err);
throw err;
}
});
With:
const mv = require('mv');
mv(temp_path, target_path, function (err) {
if (err) {
console.log('> FileServer.jsx | route: "/files/upload" | err:', err);
throw err;
}
});
回答3:
it assisted me when working with nodejs , the concept should be the same https://stackoverflow.com/a/43206506/7878987
回答4:
In order to resolve this problem, you can rewrite as:
fs.writeFile(path_where_to_write, file, function(err) {
if (err) throw err; /*do something else.*/
});
/*and then Remove the file from tmp location*/
fs.unlink(tempPath);
and for multiple files, you could iterate this block based on length of files.
回答5:
var http = require('http');
var formidable = require('formidable');
var fs = require('fs');
http.createServer(function (req, res) {
if (req.url == '/fileupload') {
var form = new formidable.IncomingForm();
form.parse(req, function (err, fields, files) {
var oldpath = files.filetoupload.path;
console.log(oldpath);
var newpath = 'F:/your folder name/' + files.filetoupload.name;
fs.readFile(oldpath, function (err, data) {
if (err) throw err;
console.log('File read!');
// Write the file
fs.writeFile(newpath, data, function (err) {
if (err) throw err;
res.write('File uploaded and moved!');
res.end();
console.log('File written!');
});
// Delete the file
fs.unlink(oldpath, function (err) {
if (err) throw err;
console.log('File deleted!');
});
});
});
} else {
res.writeHead(200, {'Content-Type': 'text/html'});
res.write('<form action="fileupload" method="post" enctype="multipart/form-
data">');
res.write('<input type="file" name="filetoupload"><br>');
res.write('<input type="submit">');
res.write('</form>');
return res.end();
}
}).listen(8080);
回答6:
var http = require('http');
var formidable = require('formidable');
var fs = require('fs');
var mv = require('mv');
http.createServer(function (req, res) {
if (req.url == '/fileupload') {
var form = new formidable.IncomingForm();
form.parse(req, function (err, fields, files) {
var oldpath = files.filetoupload.path;
console.log(oldpath);
var newpath = 'F:/change path to your project dir/' + files.filetoupload.name;
mv(oldpath, newpath, function (err) {
if (err) throw err;
res.write('File uploaded and moved!');
res.end();
});
});
} else {
res.writeHead(200, {'Content-Type': 'text/html'});
res.write('<form action="fileupload" method="post" enctype="multipart/form-data">');
res.write('<input type="file" name="filetoupload"><br>');
res.write('<input type="submit">');
res.write('</form>');
return res.end();
}enter code here
}).listen(8080);
回答7:
You have to use fs.writeFileSync otherwise oldfile can be deleted before copied
fs.writeFileSync(newpath, data, function (err) {
if (err) throw err;
res.write('File uploaded and moved!');
res.end();
console.log('File written!');
});
// Delete the file
fs.unlink(oldpath, function (err) {
if (err) throw err;
console.log('File deleted!');
});
回答8:
yes, you can resole this problem as.
install mv by command
npm install mv --saveadd mv in your nodejs file
var mv = require('mv');<br>move file as:
mv('source_file', 'destination_file,' function(err) { if (err) { throw err; } console.log('file moved successfully'); };
来源：https://stackoverflow.com/questions/37153666/error-exdev-cross-device-link-not-permitted-rename-tmp-on-ubuntu-16-04-lts