fix for graphics generation bug, see http://www.yacy-forum.de/viewtopic.php?p=10987#10987

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@886 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/http/httpdFileHandler.java

@@ -417,6 +417,11 @@ public final class httpdFileHandler extends httpdAbstractHandler implements http
                     e.getTargetException().getMessage(),e);
                     targetClass = null;
                 }
+                if (bi == null) {
+                    // error with image generation; send file-not-found
+                    httpd.sendRespondError(this.connectionProperties,out,3,404,"File not Found",null,null);
+                } else {
+                    // send an image to client
                     targetDate = new Date(System.currentTimeMillis());
                     String mimeType = mimeTable.getProperty(targetExt,"text/html");
                     
@@ -429,7 +434,7 @@ public final class httpdFileHandler extends httpdAbstractHandler implements http
                     httpd.sendRespondHeader(this.connectionProperties, out, "HTTP/1.1", 200, null, mimeType, result.length, targetDate, null, null, null, null);
                     Thread.currentThread().sleep(200); // see below
                     serverFileUtils.write(result, out);
-                
+                }
             } else if ((targetFile.exists()) && (targetFile.canRead())) {
                 // we have found a file that can be written to the client
                 // if this file uses templates, then we use the template

source/de/anomic/tools/ImagePainter.java

@@ -350,6 +350,7 @@ public class ImagePainter {
         GraphicsConfiguration gc = gs.getDefaultConfiguration();
         BufferedImage bi = gc.createCompatibleImage(width, height, Transparency.TRANSLUCENT);
          */
+        try {
             BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
             Graphics2D gr = bi.createGraphics();
             gr.setBackground(Color.white);
@@ -382,6 +383,25 @@ public class ImagePainter {
                 }
             }
             return bi;
+        } catch (Exception e) {
+            // strange case where environment disallowes generation of graphics
+            /*
+             java.lang.InternalError: Can't connect to X11 window server using ':0.0' as the value of the DISPLAY variable.
+             at sun.awt.X11GraphicsEnvironment.initDisplay(Native Method)
+             at sun.awt.X11GraphicsEnvironment.access$000(X11GraphicsEnvironment.java:53)
+             at sun.awt.X11GraphicsEnvironment$1.run(X11GraphicsEnvironment.java:142)
+             at java.security.AccessController.doPrivileged(Native Method)
+             at sun.awt.X11GraphicsEnvironment.<clinit>(X11GraphicsEnvironment.java:131)
+             at java.lang.Class.forName0(Native Method)
+             at java.lang.Class.forName(Class.java:164)
+             at java.awt.GraphicsEnvironment.getLocalGraphicsEnvironment(GraphicsEnvironment.java:68)
+             at java.awt.image.BufferedImage.createGraphics(BufferedImage.java:1141)
+             at de.anomic.tools.ImagePainter.toImage(ImagePainter.java:354)
+             */
+            System.out.println("Error with Graphics environment:");
+            e.printStackTrace();
+            return new BufferedImage(0, 0, BufferedImage.TYPE_INT_RGB);
+        }
     }
 
 }