问题
I'm writing an offline webapp that allows user to select local file, modify it and than saves a copy also locally. Is it possible without any server (I can upload a file and return base64 of it, but it's not much of a offline)? App needs to work only on Google Chrome, so maybe I should look here?
回答1:
The HTML5 File API might prove usefull
http://www.html5rocks.com/en/tutorials/file/dndfiles/
回答2:
input = document.getElementById(inputId);
var reader = new FileReader();
reader.onload = function (e) {
base64 = e.target.result;
};
reader.readAsDataURL(input.files[0]);
where input is an element <input type='file'></input>. Also works for an input that can select multiple files.
回答3:
To work with files in the browser I use downloadify. In order to make it work with paths containing "file://" you need to allow for downloadify.swf access to the file system on the settings.
来源：https://stackoverflow.com/questions/8072294/getting-content-of-a-local-file-without-uploading