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[FLINK-3125] [web dashboard] Web server starts also when JobManager l…
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...e-web/src/main/java/org/apache/flink/runtime/webmonitor/handlers/ConstantTextHandler.java
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| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you 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. | ||
| */ | ||
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| package org.apache.flink.runtime.webmonitor.handlers; | ||
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| import io.netty.buffer.Unpooled; | ||
| import io.netty.channel.ChannelHandler; | ||
| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.channel.SimpleChannelInboundHandler; | ||
| import io.netty.handler.codec.http.DefaultFullHttpResponse; | ||
| import io.netty.handler.codec.http.HttpHeaders; | ||
| import io.netty.handler.codec.http.HttpResponse; | ||
| import io.netty.handler.codec.http.HttpResponseStatus; | ||
| import io.netty.handler.codec.http.HttpVersion; | ||
| import io.netty.handler.codec.http.router.KeepAliveWrite; | ||
| import io.netty.handler.codec.http.router.Routed; | ||
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| import org.apache.flink.runtime.webmonitor.files.MimeTypes; | ||
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| import java.io.UnsupportedEncodingException; | ||
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| /** | ||
| * Responder that returns a constant String. | ||
| */ | ||
| @ChannelHandler.Sharable | ||
| public class ConstantTextHandler extends SimpleChannelInboundHandler<Routed> { | ||
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| private static final String MIME_TYPE = MimeTypes.getMimeTypeForExtension("txt"); | ||
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| private final byte[] encodedText; | ||
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| public ConstantTextHandler(String text) { | ||
| try { | ||
| this.encodedText = text.getBytes("UTF-8"); | ||
| } | ||
| catch (UnsupportedEncodingException e) { | ||
| throw new RuntimeException(e.getMessage(), e); | ||
| } | ||
| } | ||
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| @Override | ||
| protected void channelRead0(ChannelHandlerContext ctx, Routed routed) throws Exception { | ||
| HttpResponse response = new DefaultFullHttpResponse( | ||
| HttpVersion.HTTP_1_1, HttpResponseStatus.OK, Unpooled.wrappedBuffer(encodedText)); | ||
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| response.headers().set(HttpHeaders.Names.CONTENT_ENCODING, "utf-8"); | ||
| response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, encodedText.length); | ||
| response.headers().set(HttpHeaders.Names.CONTENT_TYPE, MIME_TYPE); | ||
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| KeepAliveWrite.flush(ctx, routed.request(), response); | ||
| } | ||
| } |
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