FileSaver base64 string to file - JackHu88/Comm GitHub Wiki

***** Work for Chrome
function b64toFile(b64Data, filename, contentType) {
    var sliceSize = 512;
    var byteCharacters = atob(b64Data);
    var byteArrays = [];

    for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
        var slice = byteCharacters.slice(offset, offset + sliceSize);
        var byteNumbers = new Array(slice.length);

        for (var i = 0; i < slice.length; i++) {
            byteNumbers[i] = slice.charCodeAt(i);
        }
        var byteArray = new Uint8Array(byteNumbers);
        byteArrays.push(byteArray);
    }
    var file = new File(byteArrays, filename, {type: contentType});
    return file;
}
//var file=b64toFile(base64string,"R8S new.pdf","application/octet-stream");
var file=b64toFile(base64string,"R8S new.pdf","application/pdf");
saveAs(file);

*** Work for Chrome & IE
var blob=b64toBolb(base64string,"application/pdf");
saveAs(blob,"R8S new.pdf");

function b64toBolb(b64Data, contentType){
    var sliceSize = 512;
    var byteCharacters = atob(b64Data);
    var byteArrays = [];

    for (var offset = 0; offset < byteCharacters.length; offset += sliceSize) {
        var slice = byteCharacters.slice(offset, offset + sliceSize);
        var byteNumbers = new Array(slice.length);

        for (var i = 0; i < slice.length; i++) {
            byteNumbers[i] = slice.charCodeAt(i);
        }
        var byteArray = new Uint8Array(byteNumbers);
        byteArrays.push(byteArray);
    }
    var blob = new Blob(byteArrays, {type: contentType});
    return blob;
}

[WebMethod]
        [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
        public string DownloadAttrBase64String(string UserPIN, string NoteId, int attPosition)
        {
            byte[] fileArr;
            string base64String = "";
            string account = ConfigurationManager.AppSettings["NotesUser"];
            SqlAccount.SPCommonFunctionSoapClient sqlAccount = new SqlAccount.SPCommonFunctionSoapClient();
            string password = sqlAccount.GetPassword("Sharepoint Online", account);

            string _DominoServer = System.Configuration.ConfigurationManager.AppSettings["NotesServer"];
            string _DominoUser = System.Configuration.ConfigurationManager.AppSettings["NotesUserFile"];

            string _DominoPass = password;
            string NotesName = getNotesName(UserPIN);

            List<EFormVO> list = new List<EFormVO>();
            NotesSessionClass session = null;
            NotesDatabase database = null;
            NotesDocument document = null;
            NotesEmbeddedObject eo = null;

            try
            {
                session = new NotesSessionClass();
                session.Initialize(_DominoPass);
                database = session.GetDatabase(_DominoServer, _DominoUser, true);
                document = database.GetDocumentByUNID(NoteId);

                object[] attNameGroup = (object[])document.GetItemValue("AttachmentNames");
                string attName = attNameGroup[attPosition].ToString();
                eo = document.GetAttachment(attName);

                string fileLocation = Server.MapPath("/Attachments/") + attName;
                eo.ExtractFile(fileLocation);

                BinaryReader binReader = new BinaryReader(File.Open(fileLocation, FileMode.Open, FileAccess.Read));
                binReader.BaseStream.Position = 0;
                fileArr = binReader.ReadBytes(Convert.ToInt32(binReader.BaseStream.Length));
                binReader.Close();
                base64String = Convert.ToBase64String(fileArr);

            }
            catch (Exception ex)
            {
                throw new HttpException(500, ex.Message);
            }
            return base64String;
        }