001: package org.tigris.scarab.screens;
002:
003: /* ================================================================
004: * Copyright (c) 2000-2002 CollabNet. All rights reserved.
005: *
006: * Redistribution and use in source and binary forms, with or without
007: * modification, are permitted provided that the following conditions are
008: * met:
009: *
010: * 1. Redistributions of source code must retain the above copyright
011: * notice, this list of conditions and the following disclaimer.
012: *
013: * 2. Redistributions in binary form must reproduce the above copyright
014: * notice, this list of conditions and the following disclaimer in the
015: * documentation and/or other materials provided with the distribution.
016: *
017: * 3. The end-user documentation included with the redistribution, if
018: * any, must include the following acknowlegement: "This product includes
019: * software developed by Collab.Net <http://www.Collab.Net/>."
020: * Alternately, this acknowlegement may appear in the software itself, if
021: * and wherever such third-party acknowlegements normally appear.
022: *
023: * 4. The hosted project names must not be used to endorse or promote
024: * products derived from this software without prior written
025: * permission. For written permission, please contact info@collab.net.
026: *
027: * 5. Products derived from this software may not use the "Tigris" or
028: * "Scarab" names nor may "Tigris" or "Scarab" appear in their names without
029: * prior written permission of Collab.Net.
030: *
031: * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
032: * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
033: * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
034: * IN NO EVENT SHALL COLLAB.NET OR ITS CONTRIBUTORS BE LIABLE FOR ANY
035: * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
036: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
037: * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
038: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
039: * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
040: * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
041: * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
042: *
043: * ====================================================================
044: *
045: * This software consists of voluntary contributions made by many
046: * individuals on behalf of Collab.Net.
047: */
048:
049: // Turbine Stuff
050: import java.io.File;
051: import java.io.BufferedInputStream;
052: import java.io.FileInputStream;
053: import java.io.OutputStream;
054: import javax.servlet.http.HttpServletResponse;
055: import org.apache.turbine.RunData;
056: import org.apache.turbine.TemplateContext;
057: import org.apache.torque.om.NumberKey;
058:
059: // Scarab Stuff
060: import org.tigris.scarab.tools.localization.L10NKeySet;
061: import org.tigris.scarab.tools.localization.L10NMessage;
062: import org.tigris.scarab.tools.localization.LocalizationKey;
063: import org.tigris.scarab.util.Log;
064: import org.tigris.scarab.om.Attachment;
065: import org.tigris.scarab.om.AttachmentManager;
066:
067: /**
068: * Sends file contents directly to the output stream.
069: *
070: * @author <a href="mailto:jmcnally@collab.net">John McNally</a>
071: * @version $Id: ViewAttachment.java 9803 2005-08-06 13:50:03Z dabbous $
072: */
073: public class ViewAttachment extends Default {
074: /**
075: * builds up the context for display of variables on the page.
076: */
077: public void doBuildTemplate(RunData data, TemplateContext context)
078: throws Exception {
079: super .doBuildTemplate(data, context);
080:
081: String attachId = data.getParameters().getString("attachId");
082: Attachment attachment = AttachmentManager.getInstance(
083: new NumberKey(attachId), false);
084: String contentType = attachment.getMimeType();
085: HttpServletResponse res = data.getResponse();
086: res.setContentType(contentType);
087: // disposition header does not seem to have that much value, but
088: // adding it in a blind attempt to help win2K, IE client
089: // to handle the downloads better
090: if (!contentType.startsWith("text")) {
091: res.setHeader("Content-Disposition",
092: "attachment; filename=" + attachment.getFileName());
093: }
094:
095: File f = new File(attachment.getFullPath());
096:
097: if (!f.exists()) {
098: LocalizationKey key = L10NKeySet.AttachmentDoesNotExist;
099: L10NMessage msg = new L10NMessage(key, attachment
100: .getFullPath());
101: getScarabRequestTool(context).setAlertMessage(msg);
102: data.setTarget("Error.vm");
103: } else {
104: res.setContentLength((int) f.length());
105:
106: BufferedInputStream bis = null;
107: OutputStream os = data.getResponse().getOutputStream();
108: try {
109: bis = new BufferedInputStream(new FileInputStream(f));
110: byte[] bytes = new byte[2048];
111: int s = 0;
112: while ((s = bis.read(bytes)) != -1) {
113: try {
114: os.write(bytes, 0, s);
115: } catch (java.io.IOException ioe) {
116: Log.get().debug(
117: "File download was aborted: "
118: + attachment.getFullPath());
119: break;
120: }
121: }
122: } finally {
123: if (bis != null) {
124: bis.close();
125: }
126: }
127: }
128: // we already sent the response, there is no target to render
129: data.setTarget(null);
130: }
131: }
|