How to use the copyFile function from fs

Find comprehensive JavaScript fs.copyFile code examples handpicked from public code repositorys.

fs.copyFile is a method in Node.js that copies a file from one location to another.

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* fs.access(): 检查文件是否存在,以及 Node.js 是否有权限访问。
* fs.appendFile(): 追加数据到文件。如果文件不存在,则创建文件。
* fs.chmod(): 更改文件(通过传入的文件名指定)的权限。相关方法:fs.lchmod()、fs.fchmod()。
* fs.chown(): 更改文件(通过传入的文件名指定)的所有者和群组。相关方法:fs.fchown()、fs.lchown()。
* fs.close(): 关闭文件描述符。
* fs.copyFile(): 拷贝文件。
* fs.createReadStream(): 创建可读的文件流。
* fs.createWriteStream(): 创建可写的文件流。
* fs.link(): 新建指向文件的硬链接。
* fs.mkdir(): 新建文件夹。
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if (filedata.mimetype == "image/jpeg") fileType = ".jpeg";
if (filedata.mimetype == "image/png") fileType = ".png";
if (filedata.mimetype == "image/gif") fileType = ".gif";
if (filedata.mimetype == "image/bmp") fileType = ".bmp";
if (filedata.mimetype == "image/webp") fileType = ".webp";
fs.copyFile(img_path+img_file, 'public/backgrounds/'+img_file+fileType, (err) => {
    if(err) {
        
        return console.log(err);
    }else{
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How does fs.copyFile work?

fs.copyFile is a Node.js method that is used to copy a file from one location to another location in the file system while allowing the option to specify the file mode, and it supports progress updates as well. The method takes three arguments, the source file path, the destination file path, and an optional flag object that can be used to specify various options, such as the file mode or progress updates. The method reads the contents of the source file and writes them to the destination file using a low-level file system API. If the destination file already exists, it will be overwritten by default.

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    assert.strictEqual(err.syscall, 'copyfile');
  }
  return true;
};

fs.copyFile(existingFile, existingFile2, COPYFILE_EXCL,
            common.mustCall(validateError));

assert.throws(
  () => fs.copyFileSync(existingFile, existingFile2, COPYFILE_EXCL),
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if (destination_stats.isDirectory()) {
    copyFolderRecursiveSync(source, destination)
} else {
    // COPY FILE
    fs.copyFile(source, destination, (err) => {
        let file_grid = document.getElementById('file_grid');
        if (err) {
            console.log(err)
        } else {
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Ai Example

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const fs = require("fs");

fs.copyFile("source.txt", "destination.txt", (err) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log("File copied successfully");
});

In this example, fs.copyFile is called with the source file path as the first argument, destination file path as the second argument and a callback function as the third argument. The callback function is executed when the copy operation is complete. If there is an error, it is logged to the console. If the copy operation is successful, the message "File copied successfully" is logged to the console.

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if(jsonData.name !== undefined){
    let char = {"name": jsonData.name, "description": jsonData.description ?? '', "personality": jsonData.personality ?? '', "first_mes": jsonData.first_mes ?? '', "avatar": 'none', "chat": Date.now(), "mes_example": jsonData.mes_example ?? '', "scenario": jsonData.scenario ?? '', "create_date": Date.now()};
    char = JSON.stringify(char);
    charaWrite('./uploads/'+filedata.filename, char, png_name, response, {file_name: png_name});
    /*
    fs.copyFile('./uploads/'+filedata.filename, charactersPath+png_name+'.png', (err) => {
        if(err) {
            response.send({error:true});
            return console.log(err);
        }else{
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  }
  fs.writeFile(fpath, fcont, 'utf8', cb)
},
copy(source, target, cb=()=>{}){
  clog.info('copy', source, 'to', target)
  fs.copyFile(source, target, cb)
},
move(source, target, cb=()=>{}){
  clog.info('move', source, 'to', target)
  fs.rename(source, target, cb)
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/**
 * @description 复制文件
 */
function copyFile(template_path, target_path, isOpenFile) {
    return new Promise((resolve, reject) => {
        fs.copyFile(template_path, target_path, (err) => {
            if (err) {
                hx.window.setStatusBarMessage('创建失败!');
                reject('fail');
            } else {
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    if (!entryStat.isFile()) {
        continue;
    }

    const copyPath = `${targetPath}/${sourceName}`;
    await fs.copyFile(entryPath, copyPath);
    file_count++;
}

console.log(`    Published ${file_count} data files.`);
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img_file = filedata.filename;
if (filedata.mimetype == "image/jpeg") fileType = ".jpeg";
if (filedata.mimetype == "image/png") fileType = ".png";
if (filedata.mimetype == "image/gif") fileType = ".gif";
if (filedata.mimetype == "image/bmp") fileType = ".bmp";
fs.copyFile(img_path + img_file, 'public/backgrounds/' + img_file + fileType, (err) => {
    if (err) {

        return console.log(err);
    } else {
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}


function copyfile() {
  const fs = require('fs');
  fs.writeFileSync('fs4.txt', '123', 'utf8');
  fs.copyFile('fs4.txt', 'a.txt', () => {
    fs.unlinkSync('fs4.txt');
    fs.unlinkSync('a.txt');
  });
}
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    });
  });
}
else if (fs.existsSync(`${this.projectsDir}/${projectName}/.example.env`))
{
  fs.copyFile(`${this.projectsDir}/${projectName}/.example.env`, `${this.projectsDir}/${projectName}/.env`, (err) =>
  {
    if (err)
    {
      return res.json({
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    permission: 'FileSystemRead',
    resource: path.toNamespacedPath(blockedFile),
  }));
}


// fs.copyFile
{
  assert.throws(() => {
    fs.copyFile(blockedFile, path.join(blockedFolder, 'any-other-file'), () => {});
  }, common.expectsError({
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