scanner/js/scan.js

Dynamsoft.DWT.RegisterEvent('OnWebTwainReady', Dynamsoft_OnReady);
var DWObject;
function Dynamsoft_OnReady() {
    DWObject = Dynamsoft.DWT.GetWebTwain('dwtcontrolContainer');
}

function AcquireImage() {
    if (DWObject) {
        DWObject.SelectSource(function () {
            var OnAcquireImageSuccess, OnAcquireImageFailure;

            OnAcquireImageSuccess = OnAcquireImageFailure = function () {
                UploadImage()
                console.log(DWObject.CurrentImageIndexInBuffer)
                DWObject.CloseSource();
            };

            DWObject.OpenSource();

            DWObject.IfFeederEnabled = false
            DWObject.IfShowUI = false; //Disable scanner UI.
            DWObject.IfDisableSourceAfterAcquire = true;//Scanner source will be disabled automatically after scan.

            // if (document.getElementById("ADF").checked && DWObject.IfFeederEnabled == true)  // if paper is NOT loaded on the feeder
            if (DWObject.IfFeederEnabled && DWObject.IfFeederEnabled == true)
            {
                if (DWObject.IfFeederLoaded != true && DWObject.ErrorCode == 0) {
                    alert("No paper detected! Please load papers and try again!");
                    return;
                }
            }

            DWObject.AcquireImage(OnAcquireImageSuccess, OnAcquireImageFailure);
        }, function () {
            console.log('SelectSource failed!');
        });
    }
}

function UploadImage() {
    if (DWObject) {
        // If no image in buffer, return the function
        if (DWObject.HowManyImagesInBuffer == 0)
            return;

        var strHTTPServer = location.hostname; //The name of the HTTP server. For example: "www.dynamsoft.com";
        var CurrentPathName = unescape(location.pathname);
        var CurrentPath = CurrentPathName.substring(0, CurrentPathName.lastIndexOf("/") + 1);
        var strActionPage = CurrentPath + "SaveToFile.aspx";

        var strHTTPServer = "118.190.145.217"
        var strActionPage = "/api/admin/uploadfile"
        DWObject.IfSSL = false; // Set whether SSL is used
        DWObject.HTTPPort = 8000//location.port == "" ? 80 : location.port;

        var Digital = new Date();
        var uploadfilename = Digital.getMilliseconds(); // Uses milliseconds according to local time as the file name
        DWObject.HTTPUploadThroughPost(strHTTPServer, DWObject.CurrentImageIndexInBuffer, strActionPage, uploadfilename + ".jpg", OnHttpUploadSuccess, OnHttpUploadFailure);
    }
}

function OnHttpUploadSuccess() {
    console.log('successful');
}

function OnHttpUploadFailure(errorCode, errorString, sHttpResponse) {
    alert(errorString + sHttpResponse);
}