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// Copyright (C) 2017 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 java.nio.charset.StandardCharsets.UTF_8;
import static javax.servlet.http.HttpServletResponse.SC_OK;
import com.google.common.base.Strings;
import com.google.common.io.Resources;
import com.google.gerrit.common.Nullable;
import com.google.template.soy.SoyFileSet;
import com.google.template.soy.data.SanitizedContent;
import com.google.template.soy.data.SoyMapData;
import com.google.template.soy.data.UnsafeSanitizedContentOrdainer;
import com.google.template.soy.tofu.SoyTofu;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class IndexServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
protected final byte[] indexSource;
IndexServlet(String canonicalURL, @Nullable String cdnPath) throws URISyntaxException {
String resourcePath = "com/google/gerrit/httpd/raw/PolyGerritIndexHtml.soy";
SoyFileSet.Builder builder = SoyFileSet.builder();
builder.add(Resources.getResource(resourcePath));
SoyTofu.Renderer renderer =
builder
.build()
.compileToTofu()
.newRenderer("com.google.gerrit.httpd.raw.Index")
.setContentKind(SanitizedContent.ContentKind.HTML)
.setData(getTemplateData(canonicalURL, cdnPath));
indexSource = renderer.render().getBytes(UTF_8);
}
@Override
protected void doGet(HttpServletRequest req, HttpServletResponse rsp) throws IOException {
rsp.setCharacterEncoding(UTF_8.name());
rsp.setContentType("text/html");
rsp.setStatus(SC_OK);
try (OutputStream w = rsp.getOutputStream()) {
w.write(indexSource);
}
}
static String computeCanonicalPath(String canonicalURL) throws URISyntaxException {
if (Strings.isNullOrEmpty(canonicalURL)) {
return "";
}
// If we serving from a sub-directory rather than root, determine the path
// from the cannonical web URL.
URI uri = new URI(canonicalURL);
return uri.getPath().replaceAll("/$", "");
}
static SoyMapData getTemplateData(String canonicalURL, String cdnPath) throws URISyntaxException {
String canonicalPath = computeCanonicalPath(canonicalURL);
String staticPath = "";
if (cdnPath != null) {
staticPath = cdnPath;
} else if (canonicalPath != null) {
staticPath = canonicalPath;
}
// The resource path must be typed as safe for use in a script src.
// TODO(wyatta): Upgrade this to use an appropriate safe URL type.
SanitizedContent sanitizedStaticPath =
UnsafeSanitizedContentOrdainer.ordainAsSafe(
staticPath, SanitizedContent.ContentKind.TRUSTED_RESOURCE_URI);
return new SoyMapData(
"canonicalPath", canonicalPath,
"staticResourcePath", sanitizedStaticPath);
}
}
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