added close to fix possible resource leak warning

source/net/yacy/http/servlets/YaCyDefaultServlet.java

@@ -488,7 +488,6 @@ public class YaCyDefaultServlet extends HttpServlet  {
 
         // Get the output stream (or writer)
         OutputStream out;
-       // boolean written;
         try {
             out = response.getOutputStream();
         } catch (IllegalStateException e) {
@@ -514,6 +513,7 @@ public class YaCyDefaultServlet extends HttpServlet  {
                 response.setHeader(HttpHeaders.CONTENT_RANGE,
                         InclusiveByteRange.to416HeaderRangeString(content_length));
                 resource.writeTo(out, 0, content_length);
+                out.close();
                 return;
             }
 
@@ -528,6 +528,7 @@ public class YaCyDefaultServlet extends HttpServlet  {
                 response.setHeader(HttpHeaders.CONTENT_RANGE,
                         singleSatisfiableRange.toHeaderRangeString(content_length));
                 resource.writeTo(out, singleSatisfiableRange.getFirst(content_length), singleLength);
+                out.close();
                 return;
             }
 
@@ -814,13 +815,10 @@ public class YaCyDefaultServlet extends HttpServlet  {
                     final RasterPlotter yp = (RasterPlotter) tmp;
                     // send an image to client
                     result = RasterPlotter.exportImage(yp.getImage(), "png");
-                }
-                if (tmp instanceof EncodedImage) {
+                } else if (tmp instanceof EncodedImage) {
                     final EncodedImage yp = (EncodedImage) tmp;
                     result = yp.getImage();
-                }
-
-                if (tmp instanceof Image) {
+                } else if (tmp instanceof Image) {
                     final Image i = (Image) tmp;
 
                     // generate an byte array from the generated image
@@ -843,7 +841,7 @@ public class YaCyDefaultServlet extends HttpServlet  {
                 response.setStatus(HttpServletResponse.SC_OK);
 
                 result.writeTo(response.getOutputStream());
-
+                result.close();
                 return;
             }
 

source/net/yacy/server/http/HTTPDemon.java

@@ -104,9 +104,9 @@ public final class HTTPDemon {
     static Map<String, byte[]> parseMultipart(final RequestHeader header, final serverObjects args, final InputStream in) throws IOException {
 
         final InputStream body = prepareBody(header, in);
-
         final RequestContext request = new yacyContextRequest(header, body);
-
+        body.close();
+        
         // check information
         if (!FileUploadBase.isMultipartContent(request)) {
             throw new IOException("the request is not a multipart-message!");

source/net/yacy/server/http/TemplateEngine.java

@@ -384,8 +384,10 @@ public final class TemplateEngine {
                 } else {
                     // inconsistency, simply finalize this
                     FileUtils.copy(pis, out);
+                    pis.close();
                     final byte[] sb = structure.getBytes();
                     structure.close();
+                    keyStream.close();
                     return sb;
                 }