function FileInfo(file, pagesize) {
this.Size = file.size;
this.File = file;
this.FileType = file.type;
this.FileName = file.name;
this.PageSize = pagesize;
this.PageIndex = 0;
this.Pages = 0;
this.UploadError = null;
this.UploadProcess = null;
this.DataBuffer = null;
this.UploadBytes = 0;
this.ID = Math.floor(Math.random() * 0x10000).toString(16);
this.LoadCallBack = null;
if
(Math.floor(this.Size % this.PageSize) > 0) {
this.Pages = Math.floor((this.Size / this.PageSize)) + 1;
}
else
{
this.Pages = Math.floor(this.Size / this.PageSize);
}
}
FileInfo.prototype.Reset = function
() {
this.PageIndex = 0;
this.UploadBytes = 0;
}
FileInfo.prototype.toBase64String = function
() {
var
binary = ''
var
bytes = new Uint8Array(this.DataBuffer)
var
len = bytes.byteLength;
for
(var i = 0; i
binary += String.fromCharCode(bytes[i])
}
return
window.btoa(binary);
}
FileInfo.prototype.OnLoadData = function
(evt) {
var
obj = evt.target["tag"];
if
(evt.target.readyState == FileReader.DONE) {
obj.DataBuffer = evt.target.result;
if
(obj.LoadCallBack != null)
obj.LoadCallBack(obj);
}
else
{
if
(obj.UploadError != null)
obj.UploadError(fi, evt.target.error);
}
}
FileInfo.prototype.Load = function
(completed) {
this.LoadCallBack = completed;
if
(this.filereader == null
|| this.filereader == undefined)
this.filereader = new
FileReader();
var
reader = this.filereader;
reader["tag"] = this;
reader.onloadend = this.OnLoadData;
var
count = this.Size - this.PageIndex * this.PageSize;
if
(count > this.PageSize)
count = this.PageSize;
this.UploadBytes += count;
var
blob = this.File.slice(this.PageIndex * this.PageSize, this.PageIndex * this.PageSize + count);
reader.readAsArrayBuffer(blob);
};
FileInfo.prototype.OnUploadData = function
(file) {
var
channel = file._channel;
var
url = file._url;
channel.Send({ url: url, parameters: { FileID: file.ID, PageIndex: file.PageIndex, Pages: file.Pages, Base64Data: file.toBase64String()} }, function
(result) {
if
(result.status == null
|| result.status == undefined) {
file.PageIndex++;
if
(file.UploadProcess != null)
file.UploadProcess(file);
if
(file.PageIndex
file.Load(file.OnUploadData);
}
}
else
{
if
(file.UploadError != null)
file.UploadError(file, data.status);
}
});
}
FileInfo.prototype.Upload = function
(channel, url) {
var
fi = this;
channel.Send({ url: url, parameters: { FileName: fi.FileName, Size: fi.Size, FileID: fi.ID} }, function
(result) {
if
(result.status == null
|| result.status == undefined) {
fi._channel = channel;
fi._url = result.data;
fi.Load(fi.OnUploadData);
}
else
{
if
(file.UploadError != null)
file.UploadError(fi, result.status);
}
});
}
