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authorGerald Palfinger <gerald.palfinger@iaik.tugraz.at>2022-01-11 10:51:08 +0100
committerGerald Palfinger <gerald.palfinger@iaik.tugraz.at>2022-01-12 14:08:10 +0100
commit08a09e29f16a6419e10ab3af2efbeda69cb84694 (patch)
tree55c7cb404f6f5c704fa884707e2600f200625731 /pdf-as-web/src/main/java
parenta898c819e2b496d63c5335faa6f232e7f16423cb (diff)
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Change placeholder image output from PNG to JPG
Microsoft Word's "print to pdf" function lowers the quality of png images used in a word document. This leads to a failure on pdf-as placeholder detection using the resulting pdf document.
Diffstat (limited to 'pdf-as-web/src/main/java')
-rw-r--r--pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PlaceholderGeneratorServlet.java29
1 files changed, 11 insertions, 18 deletions
diff --git a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PlaceholderGeneratorServlet.java b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PlaceholderGeneratorServlet.java
index a35269d2..1036ef0b 100644
--- a/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PlaceholderGeneratorServlet.java
+++ b/pdf-as-web/src/main/java/at/gv/egiz/pdfas/web/servlets/PlaceholderGeneratorServlet.java
@@ -15,7 +15,6 @@ import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
-import org.apache.commons.io.IOUtils;
import org.apache.http.HttpStatus;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -29,9 +28,6 @@ import at.gv.egiz.pdfas.web.helper.QRCodeGenerator;
public class PlaceholderGeneratorServlet extends HttpServlet implements PlaceholderExtractorConstants {
- /**
- *
- */
private static final long serialVersionUID = -5854130802422496977L;
public static final String PARAM_ID = "id";
@@ -55,10 +51,9 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
this.doProcess(req, resp);
}
- protected void doProcess(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
-
+ protected void doProcess(HttpServletRequest req, HttpServletResponse resp) throws IOException {
if(!WebConfiguration.isQRPlaceholderGenerator()) {
- logger.info("QR Placeholder is disabled by configuration (see {})" + WebConfiguration.PLACEHOLDER_GENERATOR_ENABLED);
+ logger.info("QR Placeholder is disabled by configuration (see {})", WebConfiguration.PLACEHOLDER_GENERATOR_ENABLED);
resp.sendError(HttpStatus.SC_NOT_FOUND);
return;
}
@@ -74,7 +69,7 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
if(id != null && !id.isEmpty()) {
id = id.replaceAll("[^0-9]", "");
- if(id != null && !id.isEmpty()) {
+ if(!id.isEmpty()) {
try{
if(id.length()> 5)
id = id.substring(0,5);
@@ -99,9 +94,9 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
}
}
- filename = filename + ".png";
+ filename = filename + ".jpg";
- logger.info("generating qr placeholder for '{}' as {}", buildString, filename);
+ logger.info("Generating QR placeholder for '{}' as {}", buildString, filename);
//if(id != null || profile != null) {
// We need to generate the image
@@ -152,7 +147,7 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
try {
QRCodeGenerator.generateQRCode(buildString, baos, qrSize);
} catch (WriterException e) {
- logger.warn("Failed to generate QR Code for placeholder generationg", e);
+ logger.warn("Failed to generate QR Code for placeholder generation", e);
resp.sendError(HttpStatus.SC_INTERNAL_SERVER_ERROR);
return;
}
@@ -160,9 +155,8 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
baos.close();
BufferedImage qr = ImageIO.read(new ByteArrayInputStream(baos.toByteArray()));
- BufferedImage off_Image =
- new BufferedImage(width, height,
- BufferedImage.TYPE_INT_ARGB);
+ BufferedImage off_Image = new BufferedImage(width, height,
+ BufferedImage.TYPE_INT_RGB); //use TYPE_INT_ARGB for png, TYPE_INT_RGB for jpg
Graphics g = off_Image.getGraphics();
g.setColor(new Color(255,255,255,1));
@@ -188,7 +182,6 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
int start = (height - textHeight) / 2;
if(profile != null && profile.endsWith("_EN")) {
-
g.drawString("placeholder for the", qrSize + ( 3 * border), start + lineSpace);
g.drawString("electronic signature", qrSize + ( 3 * border), start + (2 * lineSpace));
} else {
@@ -196,7 +189,6 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
g.drawString("elektronische Signatur", qrSize + ( 3 * border), start + (2 * lineSpace));
}
if(id != null && !id.isEmpty()) {
-
Font nrFont = new Font(Font.SANS_SERIF, Font.BOLD | Font.ITALIC, 10);
g.setFont(nrFont);
@@ -204,12 +196,13 @@ public class PlaceholderGeneratorServlet extends HttpServlet implements Placehol
}
logger.info("serving qr placeholder for '{}'", buildString);
- resp.setContentType("image/png");
+ resp.setContentType("image/jpeg");
resp.setHeader("Cache-Control", "private, no-store, no-cache, must-revalidate");
resp.setHeader("Pragma", "no-cache");
resp.setHeader ("Content-Disposition", "attachment; filename=\""+filename+"\"");
- ImageIO.write(off_Image, "PNG", resp.getOutputStream());
+ // Use JPG (instead of PNG) as output format to avoid placeholder being not recognised after printing to PDF in Microsoft Word
+ ImageIO.write(off_Image, "JPG", resp.getOutputStream());
return;
/*} else {
// just use the template