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// Copyright (C) 2010 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package com.google.gerrit.httpd.raw;
import static com.google.gerrit.httpd.HtmlDomUtil.compress;
import static com.google.gerrit.httpd.HtmlDomUtil.newDocument;
import static com.google.gerrit.httpd.HtmlDomUtil.toUTF8;
import static java.nio.charset.StandardCharsets.UTF_8;
import static javax.servlet.http.HttpServletResponse.SC_NOT_FOUND;
import static org.eclipse.jgit.util.HttpSupport.HDR_CACHE_CONTROL;
import static org.eclipse.jgit.util.HttpSupport.HDR_EXPIRES;
import static org.eclipse.jgit.util.HttpSupport.HDR_PRAGMA;
import com.google.gerrit.common.Version;
import com.google.gerrit.server.tools.ToolsCatalog;
import com.google.gerrit.server.tools.ToolsCatalog.Entry;
import com.google.gwtjsonrpc.server.RPCServletUtils;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.io.IOException;
import java.io.OutputStream;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/** Sends the client side tools we keep within our software. */
@Singleton
public class ToolServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
private final ToolsCatalog toc;
@Inject
ToolServlet(ToolsCatalog toc) {
this.toc = toc;
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
Entry ent = toc.get(req.getPathInfo());
if (ent == null) {
rsp.sendError(SC_NOT_FOUND);
return;
}
switch (ent.getType()) {
case FILE:
doGetFile(ent, rsp);
break;
case DIR:
doGetDirectory(ent, req, rsp);
break;
default:
rsp.sendError(SC_NOT_FOUND);
break;
}
}
private void doGetFile(Entry ent, HttpServletResponse rsp) throws IOException {
byte[] tosend = ent.getBytes();
rsp.setDateHeader(HDR_EXPIRES, 0L);
rsp.setHeader(HDR_PRAGMA, "no-cache");
rsp.setHeader(HDR_CACHE_CONTROL, "no-cache, must-revalidate");
rsp.setContentType("application/octet-stream");
rsp.setContentLength(tosend.length);
try (OutputStream out = rsp.getOutputStream()) {
out.write(tosend);
}
}
private void doGetDirectory(Entry ent, HttpServletRequest req, HttpServletResponse rsp)
throws IOException {
String path = "/tools/" + ent.getPath();
Document page = newDocument();
Element html = page.createElement("html");
Element head = page.createElement("head");
Element title = page.createElement("title");
Element body = page.createElement("body");
page.appendChild(html);
html.appendChild(head);
html.appendChild(body);
head.appendChild(title);
title.setTextContent("Gerrit Code Review - " + path);
Element h1 = page.createElement("h1");
h1.setTextContent(title.getTextContent());
body.appendChild(h1);
Element ul = page.createElement("ul");
body.appendChild(ul);
for (Entry e : ent.getChildren()) {
String name = e.getName();
if (e.getType() == Entry.Type.DIR && !name.endsWith("/")) {
name += "/";
}
Element li = page.createElement("li");
Element a = page.createElement("a");
a.setAttribute("href", name);
a.setTextContent(name);
li.appendChild(a);
ul.appendChild(li);
}
body.appendChild(page.createElement("hr"));
Element footer = page.createElement("p");
footer.setAttribute("style", "text-align: right; font-style: italic");
footer.setTextContent("Powered by Gerrit Code Review " + Version.getVersion());
body.appendChild(footer);
byte[] tosend = toUTF8(page);
if (RPCServletUtils.acceptsGzipEncoding(req)) {
rsp.setHeader("Content-Encoding", "gzip");
tosend = compress(tosend);
}
rsp.setDateHeader(HDR_EXPIRES, 0L);
rsp.setHeader(HDR_PRAGMA, "no-cache");
rsp.setHeader(HDR_CACHE_CONTROL, "no-cache, must-revalidate");
rsp.setContentType("text/html");
rsp.setCharacterEncoding(UTF_8.name());
rsp.setContentLength(tosend.length);
try (OutputStream out = rsp.getOutputStream()) {
out.write(tosend);
}
}
}
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