org.apache.flink.runtime.rest.handler.util.HandlerRedirectUtils Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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
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* Unless required by applicable law or agreed to in writing, software
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package org.apache.flink.runtime.rest.handler.util;
import org.apache.flink.configuration.ConfigConstants;
import org.apache.flink.shaded.netty4.io.netty.buffer.ByteBuf;
import org.apache.flink.shaded.netty4.io.netty.buffer.Unpooled;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.DefaultFullHttpResponse;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.FullHttpResponse;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpHeaders;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponse;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpResponseStatus;
import org.apache.flink.shaded.netty4.io.netty.handler.codec.http.HttpVersion;
import javax.annotation.Nullable;
import java.nio.charset.Charset;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Utilities to extract a redirect address.
*
* This is necessary at the moment, because many execution graph structures are not serializable.
* The proper solution here is to have these serializable and transparently work with the leading
* job manager instead of redirecting.
*/
public class HandlerRedirectUtils {
public static final Charset ENCODING = ConfigConstants.DEFAULT_CHARSET;
public static HttpResponse getRedirectResponse(String redirectAddress, String path, HttpResponseStatus code) {
checkNotNull(redirectAddress, "Redirect address");
checkNotNull(path, "Path");
String newLocation = String.format("%s%s", redirectAddress, path);
HttpResponse redirectResponse = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, code);
redirectResponse.headers().set(HttpHeaders.Names.LOCATION, newLocation);
redirectResponse.headers().set(HttpHeaders.Names.CONTENT_LENGTH, 0);
return redirectResponse;
}
public static HttpResponse getResponse(HttpResponseStatus status, @Nullable String message) {
ByteBuf messageByteBuf = message == null ? Unpooled.buffer(0)
: Unpooled.wrappedBuffer(message.getBytes(ENCODING));
FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, status, messageByteBuf);
response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "text/plain; charset=" + ENCODING.name());
response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes());
return response;
}
}