上传前更改文件内容 [英] Alter file contents before uploading

问题描述

我想在上传到我们的服务器之前加密文件的内容..我们正在使用fineuploader。

I would like to encrypt the contents of a file before uploading to our server .. we are using fineuploader.

我想做的是：

function onSubmitted(id)
{
    var file = uploader.getFile(id);
    var reader = new FileReader();

    reader.onload = function (e) {
      //encrypt here

      // but how do I save the file back to fineuploader?

      //then continue to submit/upload
     };

   reader.readAsArrayBuffer(file);
}

有什么方法可以开箱即用，或者我需要诉诸猖獗的hackery :) :)

is there any way of doing this out of the box or will I need to resort to rampant hackery :) :)

推荐答案

如何返回false以拒绝 onSubmit <中的文件/ code>，对其进行加密，然后通过 addBlobs API方法重新提交加密版本。例如：

How about returning false to reject the file from onSubmit, encrypt it, then re-submit the encrypted version via the addBlobs API method. For example:

callbacks: {
    onSubmit: function(id) {
        if (!fileOrBlob.blob || !fileOrBlob.blob.encrypted) {
            var fileOrBlob = uploader.getFile(id),
                reader = new FileReader();

            reader.onload = function (e) {
                //encrypt here

                encryptedBlob.encrypted = true;
                uploader.addBlobs({name: fileOrBlob.name, blob: encryptedBlob});
            };

            reader.readAsArrayBuffer(file);

            return false;
        }
    }
} 

注意：上面没有经过测试。如果您遇到严重问题，我会在大约9小时内回来查看。

NOTE: The above has not been tested. If you run into serious issues, I'll check back in about 9 hours.

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