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// Copyright 2014 The Bazel Authors. All rights reserved.
//
// 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.devtools.build.lib.webstatusserver;
import com.google.common.collect.ImmutableList;
import com.google.common.io.CharStreams;
import com.google.devtools.build.lib.util.ResourceFileLoader;
import com.sun.net.httpserver.HttpExchange;
import com.sun.net.httpserver.HttpHandler;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.List;
/**
* Handler for static resources (JS, html, css...)
*/
public class StaticResourceHandler implements HttpHandler {
private String response;
private List<String> contentType;
private int httpCode;
public static StaticResourceHandler createFromAbsolutePath(String path, String contentType) {
return new StaticResourceHandler(path, contentType, true);
}
public static StaticResourceHandler createFromRelativePath(String path, String contentType) {
return new StaticResourceHandler(path, contentType, false);
}
private StaticResourceHandler(String path, String contentType, boolean absolutePath) {
try {
if (absolutePath) {
InputStream resourceStream = loadFromAbsolutePath(WebStatusServerModule.class, path);
response = CharStreams.toString(new InputStreamReader(resourceStream));
} else {
response = ResourceFileLoader.loadResource(WebStatusServerModule.class, path);
}
httpCode = 200;
} catch (IOException e) {
throw new IllegalArgumentException("resource " + path + " not found");
}
this.contentType = ImmutableList.of(contentType);
}
@Override
public void handle(HttpExchange exchange) throws IOException {
exchange.getResponseHeaders().put("Content-Type", contentType);
exchange.sendResponseHeaders(httpCode, response.length());
try (OutputStream os = exchange.getResponseBody()) {
os.write(response.getBytes(StandardCharsets.UTF_8));
}
}
public static InputStream loadFromAbsolutePath(Class<?> loadingClass, String path)
throws IOException {
URL resourceUrl = loadingClass.getClassLoader().getResource(path);
if (resourceUrl == null) {
throw new IllegalArgumentException("resource " + path + " not found");
}
return resourceUrl.openStream();
}
}
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