Drupal中无刷新上传文件技术探讨
在web中实现无刷新上传文件目前有几种方式：
1. 使用HTML5中的FormData和fileReader实现。但是这种方式只能用于IE10之后。
2. 使用swf文件做中转。
3. 使用隐藏的iframe提交。
以上2和3其实类似。
我在Drupal 7里发现content-type为image的字段都可以实现无刷新上传。
我研究了半天不知道它是怎么做到的。我的结论是：目前可排除第一种和第二种。但是第三种我也没在HTML内发现iframe的存在。
求解！
谢谢！
回复讨论(解决方案)
你有代码，你不知道是怎么回事
我没代码，我怎知道什么回事呢
百度、google一大堆无刷新上传的东西，不局限这三种吧！按你说的，你已经把那三种可能给排除了，所以...
你有代码，你不知道是怎么回事
我没代码，我怎知道什么回事呢
这是Drupal7内置的功能，应该是内置的module/file/里实现的。但是对Drupal7源码不熟，有Drupal高手有研究吗？
百度、google一大堆无刷新上传的东西，不局限这三种吧！按你说的，你已经把那三种可能给排除了，所以...
谢谢xuyanlu，其实我是想搞明白Drupal里是怎么实现的。:)
自己找到了。
Drupal引入了jquery.form.js。
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