Dynamsoft TWAIN Products

I have an image that is frequently reused, so I've created a button that adds the common page to the image buffer.

Here's the code for my button:
<input id="btnDocSeparator " onclick="return btnDocSeparator _onclick()" type="button" value="Doc Separator">

Here's the function:
function btnDocSeparator _onclick() {
frmScan.DynamicWebTwain1.HTTPDownloadEx("localhost", "WebCapture/PATCHCODE4.tif", 2);
if (frmScan.DynamicWebTwain1.ErrorCode != 0) {
alert(frmScan.DynamicWebTwain1Thumbnail.ErrorString);
}
}

This works well for a short time after the application is opened, but if you let it sit for approximately 2-5 minutes and click the button it will pause for a while and then throw the following error:
"The connection with the server was reset". If I refresh the page the buffer clears and the function will work again for several minutes.

I tried rewriting the function to use HTTPDownload() instead of HTTPDownloadEx(), but it has the same problem. Do you have any suggestions?


Thanks,
William Davis

Hi William,

The code seems all right.

We tried on our side, and the issue didn't occur. We think that the issue on your side could have been caused by unstable network. Such as Connection Timeout of the server etc. Would you please check this on your side?

Also, you can try the line below and see if the same issue repeats:

Please keep us updated on the issue.

I was able to fix this problem by executing the following code when I load the page that contains the Dynamsoft ActiveX control:

frmScan.DynamicWebTwain1.HTTPPort = 443;
frmScan.DynamicWebTwain1.IfSSL = true;

I had the HTTPPort parameter set to "443" in my Web Twain object, but I wasn't setting the IfSSL property to true. This caused HTTPDownloadEx to work initially, but break after a few minutes.

Hi William,

I'm glad to hear that you've solved the problem by yourself.