Node.js 0.5.x的递归目录创建

Question

我有一个函数可以下载文件并根据发送给它的参数将其保存在嵌套目录结构中(例如:./somedir/a/b/c或./somedir2/a/d/b).我不能相信沿途的任何目录都已创建,因此我需要检查并创建文件路径中的每个目录(如果它不存在).现在,我有一些适用于Node 0.4.x的代码,但至少在Windows版本的0.5.x(特别是在0.5.10上测试)中出现了一些问题.

我对理解文件系统很糟糕,所以如果有人能弄明白我是如何做到这一点的,或者用类似的其他东西替换它,我会非常感激.目标是使代码能够在Unix和Windows以及Node 0.4.x和0.5.x上正常运行.

// automatically create directories if they do not exist at a path
function mkdirs(_path, mode, callback) {
  var dirs = _path.split("/");
  var walker = [dirs.shift()];

  var walk = function (ds, acc, m, cb) {
    if (ds.length > 0) {
      var d = ds.shift();
      acc.push(d);
      var dir = acc.join("/");

      fs.stat(dir, function (err, stat) {
        if (err) {
          // file does not exist
          if (err.errno == 2) {
            fs.mkdir(dir, m, function (erro) {
              if (erro && erro.errno != 17) {
                terminal.error(erro, "Failed to make " + dir);
                return cb(new Error("Failed to make " + dir + "\n" + erro));
              } else {
                return walk(ds, acc, m, cb);
              }
            });
          } else {
            return cb(err);
          }
        } else {
          if (stat.isDirectory()) {
            return walk(ds, acc, m, cb);
          } else {
            return cb(new Error("Failed to mkdir " + dir + ": File exists\n"));
          }
        }
      });
    } else {
      return cb();
    }
  };
  return walk(dirs, walker, mode, callback);
};

用法示例:

mkdirs('/path/to/file/directory/', 0777, function(err){

编辑:节点0.8.x的更新(在CoffeeScript中):

# 
# Function mkdirs
# Ensures all directories in a path exist by creating those that don't
# @params
#    path:      string of the path to create (directories only, no files!)
#    mode:      the integer permission level
#    callback:  the callback to be used when complete
# @callback
#    an error object or false
#
mkdirs = (path, mode, callback) ->
  tryDirectory = (dir, cb) ->
    fs.stat dir, (err, stat) ->
      if err #the file doesn't exist, try one stage earlier then create
        if err.errno is 2 or err.errno is 32 or err.errno is 34
          if dir.lastIndexOf("/") is dir.indexOf("/") #only slash remaining is initial slash
            #should only be triggered when path is '/' in Unix, or 'C:/' in Windows
            cb new Error("notfound")
          else
            tryDirectory dir.substr(0, dir.lastIndexOf("/")), (err) ->
              if err #error, return
                cb err
              else #make this directory
                fs.mkdir dir, mode, (error) ->
                  if error and error.errno isnt 17
                    cb new Error("failed")
                  else
                    cb()
        else #unkown error
          cb err
      else
        if stat.isDirectory() #directory exists, no need to check previous directories
          cb()
        else #file exists at location, cannot make folder
          cb new Error("exists")
  path = (if path.indexOf("\\") >= 0 then path.replace("\\", "/") else path) #change windows slashes to unix
  path = path.substr(0, path.length - 1)  if path.substr(path.length - 1) is "/" #remove trailing slash
  tryDirectory path, callback

Answer 1

function mkdir(path, root) {

    var dirs = path.split('/'), dir = dirs.shift(), root = (root || '') + dir + '/';

    try { fs.mkdirSync(root); }
    catch (e) {
        //dir wasn't made, something went wrong
        if(!fs.statSync(root).isDirectory()) throw new Error(e);
    }

    return !dirs.length || mkdir(dirs.join('/'), root);
}

用法:

var fs = require('fs');
mkdir('parent/child/grandchild');

Answer 2

看看node-fs(https://npmjs.org/package/node-fs).

node-fs是原始nodejs fs库的扩展,提供了新的功能,例如递归目录创建.

Answer 3

我有一个网站,允许用户将他们的照片上传到他们自己的文件夹.我找不到一个好的开源模块来递归创建目录,所以我实现了一个.https://github.com/samxxu/ensureDir,可以安装

$ npm install ensureDir

这是完整的源代码:

var path = require('path');
var fs = require('fs');

/**
 * ensure a directory exists, create it recursively if not.
 *
 * @param dir The directory you want to ensure it exists
 * @param mode Refer to fs.mkdir()
 * @param callback
 */
module.exports = function ensureDir(dir, mode, callback) {
  if (mode && typeof mode === 'function') {
    callback = mode;
    mode = null;
  }

  mode = mode || 0777 & (~process.umask());

  callback = callback || function () {
  };

  _ensureDir(dir, mode, callback);
}

function _ensureDir(dir, mode, callback) {
  var existsFunction = fs.exists || path.exists;

  existsFunction(dir, function (exists) {
    if (exists) return callback(null);

    var current = path.resolve(dir);
    var parent = path.dirname(current);

    _ensureDir(parent, mode, function (err) {
      if (err) return callback(err);

      fs.mkdir(current, mode, function (err) {
        if (err) return callback(err);
        callback();
      });
    });
  });
}