使用一个输入javascript处理目录/文件上传 [英] Handle directory/files upload with one input javascript

问题描述

我想允许用户拖动和上传目录和文件。

I want to allow users dragging and uploading directory and files.

我知道我可以创建

<input type="file" multiple />
<!-- for files/multiple files upload-->

和

<input type="file" directory mozDirectory webkitDirectory />
<!-- for directory uploads -->

我尝试检测用户拖动项目（如果它是目录或文件）并设置目录属性取决于在那，但事实证明，javascript不允许你检查。

i tried detecting while user is dragging the item if it is a directory or file and setting directory attribute depending on that, but turns out that javascript doesn't allow you to check that.

我也看到很多网站用户可以拖动文件和目录在一起，甚至多个目录。

also i have seen on lot of websites that users are able to drag both files and directories together and even multiple directories.

我该如何实现？

推荐答案

文件夹的拖放工作在 Chrome> = 21

这是您需要的（未尝试过） ，但它可以给你这个想法）：

Here's what you need (Not tried, but it can give you the idea):

function traverseFileTree(item, path) {
  path = path || "";
  if (item.isFile) {
    // Get file
    item.file(function(file) {
      console.log("File:", path + file.name);
    });
  } else if (item.isDirectory) {
    // Get folder contents
    var dirReader = item.createReader();
    dirReader.readEntries(function(entries) {
      for (var i=0; i<entries.length; i++) {
        traverseFileTree(entries[i], path + item.name + "/");
      }
    });
  }
}

dropArea.addEventListener("drop", function(event) {
  event.preventDefault();

  var items = event.dataTransfer.items;
  for (var i=0; i<items.length; i++) {
    // webkitGetAsEntry is where the magic happens
    var item = items[i].webkitGetAsEntry();
    if (item) {
      traverseFileTree(item);
    }
  }
}, false);

可以找到更多信息这里

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