javascript 如何复制文件？
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How to copy a file?
提问by Jose Olivo
How to copy a file in Node.js?
如何在 Node.js 中复制文件？
Example
例子
+ /old
|- image.png
+ /new
I want to copy image1.png from 'old' to 'new' directory.
我想将 image1.png 从“旧”目录复制到“新”目录。
This doesn't work.
这不起作用。
newFile = fs.createWriteStream('./new/image2.png');
oldFile = fs.createReadStream('./old/image1.png');
oldFile.addListener("data", function(chunk) {
newFile.write(chunk);
})
oldFile.addListener("close",function() {
newFile.end();
});
Thanks for reply!
谢谢你的回复！
回答by Antony Hatchkins
The preferred way currently:
目前首选的方式：
oldFile.pipe(newFile);
回答by b_erb
newFile.once('open', function(fd){
require('util').pump(oldFile, newFile);
});
回答by tomraithel
If you want to do this job syncronously, just read and then write the file directly:
如果你想同步完成这项工作，只需直接读取然后写入文件：
var copyFileSync = function(srcFile, destFile, encoding) {
var content = fs.readFileSync(srcFile, encoding);
fs.writeFileSync(destFile, content, encoding);
}
Of course, error handling and stuff is always a good idea!
当然，错误处理和其他东西总是一个好主意！
回答by Oleg2tor
fs.rename( './old/image1.png', './new/image2.png', function(err){
if(err) console.log(err);
console.log("moved");
});
