如何在node.js上移动文件(如mv命令shell) ?是否有任何方法,或者我应该读取一个文件,写到一个新文件,并删除旧文件?
当前回答
本地使用nodejs
var fs = require('fs')
var oldPath = 'old/path/file.txt'
var newPath = 'new/path/file.txt'
fs.rename(oldPath, newPath, function (err) {
if (err) throw err
console.log('Successfully renamed - AKA moved!')
})
(注意:“如果您正在跨分区或使用不支持移动文件的虚拟文件系统,这将不起作用。[…——Flavien Volken 15年9月2日12:50)
其他回答
我将把所有涉及的函数(即重命名,复制,断开链接)彼此分离,以获得灵活性,并承诺一切,当然:
const renameFile = (path, newPath) =>
new Promise((res, rej) => {
fs.rename(path, newPath, (err, data) =>
err
? rej(err)
: res(data));
});
const copyFile = (path, newPath, flags) =>
new Promise((res, rej) => {
const readStream = fs.createReadStream(path),
writeStream = fs.createWriteStream(newPath, {flags});
readStream.on("error", rej);
writeStream.on("error", rej);
writeStream.on("finish", res);
readStream.pipe(writeStream);
});
const unlinkFile = path =>
new Promise((res, rej) => {
fs.unlink(path, (err, data) =>
err
? rej(err)
: res(data));
});
const moveFile = (path, newPath, flags) =>
renameFile(path, newPath)
.catch(e => {
if (e.code !== "EXDEV")
throw new e;
else
return copyFile(path, newPath, flags)
.then(() => unlinkFile(path));
});
moveFile只是一个方便的函数,我们可以分别应用这些函数,例如,当我们需要更细粒度的异常处理时。
如果您试图移动或重命名一个node.js源文件,请尝试https://github.com/viruschidai/node-mv。它将更新所有其他文件中对该文件的引用。
使用mv节点模块,它将首先尝试执行fs。重命名,然后退回到复制,然后取消链接。
就像上面的回答中所说的那样,我的2分:copy()方法不应该在没有轻微调整的情况下原样用于复制文件:
function copy(callback) {
var readStream = fs.createReadStream(oldPath);
var writeStream = fs.createWriteStream(newPath);
readStream.on('error', callback);
writeStream.on('error', callback);
// Do not callback() upon "close" event on the readStream
// readStream.on('close', function () {
// Do instead upon "close" on the writeStream
writeStream.on('close', function () {
callback();
});
readStream.pipe(writeStream);
}
复制函数封装在Promise中:
function copy(oldPath, newPath) {
return new Promise((resolve, reject) => {
const readStream = fs.createReadStream(oldPath);
const writeStream = fs.createWriteStream(newPath);
readStream.on('error', err => reject(err));
writeStream.on('error', err => reject(err));
writeStream.on('close', function() {
resolve();
});
readStream.pipe(writeStream);
})
但是,请记住,如果目标文件夹不存在,文件系统可能会崩溃。
在下面URL的帮助下,您可以复制或移动您的文件CURRENT Source到Destination Source
https://coursesweb.net/nodejs/move-copy-file
/*********Moves the $file to $dir2 Start *********/ var moveFile = (file, dir2)=>{ //include the fs, path modules var fs = require('fs'); var path = require('path'); //gets file name and adds it to dir2 var f = path.basename(file); var dest = path.resolve(dir2, f); fs.rename(file, dest, (err)=>{ if(err) throw err; else console.log('Successfully moved'); }); }; //move file1.htm from 'test/' to 'test/dir_1/' moveFile('./test/file1.htm', './test/dir_1/'); /*********Moves the $file to $dir2 END *********/ /*********copy the $file to $dir2 Start *********/ var copyFile = (file, dir2)=>{ //include the fs, path modules var fs = require('fs'); var path = require('path'); //gets file name and adds it to dir2 var f = path.basename(file); var source = fs.createReadStream(file); var dest = fs.createWriteStream(path.resolve(dir2, f)); source.pipe(dest); source.on('end', function() { console.log('Succesfully copied'); }); source.on('error', function(err) { console.log(err); }); }; //example, copy file1.htm from 'test/dir_1/' to 'test/' copyFile('./test/dir_1/file1.htm', './test/'); /*********copy the $file to $dir2 END *********/
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