File API
W3C Working Draft 20 October 2011
interface FileReader: EventTarget {
// async read methods
void readAsArrayBuffer(Blob blob);
void readAsBinaryString(Blob blob);
void readAsText(Blob blob, optional DOMString encoding);
void readAsDataURL(Blob blob);
...
}
interface Blob {
readonly attribute unsigned long long size;
readonly attribute DOMString type;
//slice Blob into byte-ranged chunks
Blob slice(optional long long start,
optional long long end,
optional DOMString contentType);
};