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83 | package Torello.HTML.Tools.Images;
import Torello.Java.Additional.Ret2;
import java.awt.image.BufferedImage;
// Convert a B64-Image to a java.awt.image.BufferedImage instance
class ConvertB64Image
{
static Ret2<BufferedImage, IF> run(final RECORD r)
throws ImageScraperException
{
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
// Internally, the request-class saves B64-Images as Two-Element String[]-Array's
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
final String imageFormatStr = r.b64ImageData[0];
final String b64EncodedImage = r.b64ImageData[1];
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
// Skipping B64-Images entirely is one of the boolean-options in 'Request'
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
if (r.request.skipBase64EncodedImages)
{
if (r.logLevelEQ1) r.append("x ");
else if (r.logLevelGTEQ2) r.appendI4
("Skipping - Skip Request for all Base64-Encoded Images\n");
r.results.skipB64();
return null;
}
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
// Try to do the B64-Converstion
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
try
{
final IF ext = IF.get(imageFormatStr);
final BufferedImage image = IF.decodeBase64ToImage(b64EncodedImage, ext);
// SUCCESS!
if (image != null) new Ret2<>(image, ext);
}
catch (Exception e)
{
// This call either returns null, or throws an ImageScraperException
return r.reportEx(
r.request.skipOnB64DecodeException,
"Exception throw Java's Base-64 Image Decoder while decoding a Base-64 Image",
"Base-64 Image Decoding",
e
);
}
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
// ELSE: The Image was null, so use 'NullImageException'
// *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
final Exception niex = new NullImageException(
"The B64-Image Encoding Regular-Expression matched the Source-URL, but " +
"Java's B64-Image Decoder has returned null upon decoding it."
);
niex.fillInStackTrace();
// Returns 'null', or throws an exception
return r.reportEx(
r.request.skipOnNullImageException,
"Null Image returned by Java's B64 Image-Decoder",
"Base-64 Image Decoding",
niex
);
}
}
|