Changeset 449 for tapas/web/src/com/ether/WebHelper.java

Timestamp:

04/02/12 18:22:23 (12 years ago)

Author:

vmipsl

Message:

downloadFile to response

File:

• tapas/web/src/com/ether/WebHelper.java (modified) (2 diffs)

tapas/web/src/com/ether/WebHelper.java

@@ -12 +12 @@
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
+import java.io.BufferedInputStream;
+import java.io.File;
 import java.io.FileInputStream;
 import java.io.IOException;
+import java.io.InputStream;
+import java.io.OutputStream;
 import java.io.PrintWriter;
 import java.security.InvalidParameterException;
@@ -130 +134 @@
     }
 
+    /**
+     * This method send to the response (to download) the file named fileName localized in the path downloadPath
+     *
+     * @param fileName
+     * @param downloadPath
+     * @param response
+     * @throws WebException
+     */
+    public static void downloadFileToResponse( @NotNull final String fileName, @NotNull final String downloadPath, @NotNull final HttpServletResponse response )
+            throws WebException
+    {
+        response.setContentType( "multipart/zip" );
+        response.setHeader( "Content-Disposition", "attachment; filename=\"" + fileName.trim() + "\";" );
+
+        final File file = new File( downloadPath + fileName );
+        if( !file.exists() )
+            throw new WebException( WebException.WebCode.ERROR_TO_DOWNLOAD_FILE, file.getPath() );
+
+        response.setContentLength( (int) file.length() );
+        try
+        {
+            final OutputStream outputStream = response.getOutputStream();
+            final FileInputStream fileInputStream = new FileInputStream( file );
+
+            final BufferedInputStream bufferedInputStream = new BufferedInputStream( fileInputStream );
+            final InputStream inputStream = new BufferedInputStream( bufferedInputStream );
+
+            int count;
+            final byte[] buf = new byte[4096];
+            while( ( count = inputStream.read( buf ) ) > -1 )
+                outputStream.write( buf, 0, count );
+            inputStream.close();
+            outputStream.close();
+        }
+        catch( Exception ex )
+        {
+            throw new WebException( WebException.WebCode.ERROR_TO_DOWNLOAD_FILE, ex );
+        }
+    }
+
     public static final int STATUS_CODE_SERVICE_EXCEPTION = 500;
     public static final String PROPERTIES_FILE = "tapas.properties";