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[FLINK-2978] [web-dashboard] Integrate web client into Web Frontend
This closes apache#1338
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131 changes: 131 additions & 0 deletions
131
flink-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/HttpRequestHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| /* | ||
| * 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; | ||
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| /***************************************************************************** | ||
| * This code is based on the "HttpUploadServerHandler" from the | ||
| * Netty project's HTTP server example. | ||
| * | ||
| * See http://netty.io and | ||
| * https://github.com/netty/netty/blob/netty-4.0.31.Final/example/src/main/java/io/netty/example/http/upload/HttpUploadServerHandler.java | ||
| *****************************************************************************/ | ||
|
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| import io.netty.channel.ChannelHandlerContext; | ||
| import io.netty.channel.SimpleChannelInboundHandler; | ||
| import io.netty.handler.codec.http.HttpContent; | ||
| import io.netty.handler.codec.http.HttpHeaders; | ||
| import io.netty.handler.codec.http.HttpMethod; | ||
| import io.netty.handler.codec.http.HttpObject; | ||
| import io.netty.handler.codec.http.HttpRequest; | ||
| import io.netty.handler.codec.http.LastHttpContent; | ||
| import io.netty.handler.codec.http.QueryStringDecoder; | ||
| import io.netty.handler.codec.http.QueryStringEncoder; | ||
| import io.netty.handler.codec.http.multipart.DefaultHttpDataFactory; | ||
| import io.netty.handler.codec.http.multipart.DiskFileUpload; | ||
| import io.netty.handler.codec.http.multipart.HttpDataFactory; | ||
| import io.netty.handler.codec.http.multipart.HttpPostRequestDecoder; | ||
| import io.netty.handler.codec.http.multipart.HttpPostRequestDecoder.EndOfDataDecoderException; | ||
| import io.netty.handler.codec.http.multipart.InterfaceHttpData; | ||
| import io.netty.handler.codec.http.multipart.InterfaceHttpData.HttpDataType; | ||
|
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| import java.io.File; | ||
| import java.util.UUID; | ||
|
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| /** | ||
| * Simple code which handles all HTTP requests from the user, and passes them to the Router | ||
| * handler directly if they do not involve file upload requests. | ||
| * If a file is required to be uploaded, it handles the upload, and in the http request to the | ||
| * next handler, passes the name of the file to the next handler. | ||
| */ | ||
| public class HttpRequestHandler extends SimpleChannelInboundHandler<HttpObject> { | ||
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| private HttpRequest request; | ||
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| private boolean readingChunks; | ||
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| private static final HttpDataFactory factory = new DefaultHttpDataFactory(true); // use disk | ||
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| private String requestPath; | ||
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| private HttpPostRequestDecoder decoder; | ||
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| private final File uploadDir; | ||
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| /** | ||
| * The directory where files should be uploaded. | ||
| */ | ||
| public HttpRequestHandler(File uploadDir) { | ||
| this.uploadDir = uploadDir; | ||
| } | ||
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| @Override | ||
| public void channelUnregistered(ChannelHandlerContext ctx) throws Exception { | ||
| if (decoder != null) { | ||
| decoder.cleanFiles(); | ||
| } | ||
| } | ||
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| @Override | ||
| public void channelRead0(ChannelHandlerContext ctx, HttpObject msg) throws Exception { | ||
| if (msg instanceof HttpRequest) { | ||
| request = (HttpRequest) msg; | ||
| requestPath = new QueryStringDecoder(request.getUri()).path(); | ||
| if (request.getMethod() != HttpMethod.POST) { | ||
| ctx.fireChannelRead(request); | ||
| } else { | ||
| // try to decode the posted data now. | ||
| decoder = new HttpPostRequestDecoder(factory, request); | ||
| readingChunks = HttpHeaders.isTransferEncodingChunked(request); | ||
| if (readingChunks) { | ||
| readingChunks = true; | ||
| } | ||
| } | ||
| } else if (decoder != null && msg instanceof HttpContent) { | ||
| // New chunk is received | ||
| HttpContent chunk = (HttpContent) msg; | ||
| decoder.offer(chunk); | ||
| try { | ||
| while (decoder.hasNext()) { | ||
| InterfaceHttpData data = decoder.next(); | ||
| // IF SOMETHING EVER NEEDS POST PARAMETERS, THIS WILL BE THE PLACE TO HANDLE IT | ||
| // all fields values will be passed with type Attribute. | ||
| if (data.getHttpDataType() == HttpDataType.FileUpload) { | ||
| DiskFileUpload file = (DiskFileUpload) data; | ||
| if (file.isCompleted()) { | ||
| String newName = UUID.randomUUID() + "_" + file.getFilename(); | ||
| file.renameTo(new File(uploadDir, newName)); | ||
| QueryStringEncoder encoder = new QueryStringEncoder(requestPath); | ||
| encoder.addParam("file", newName); | ||
| request.setUri(encoder.toString()); | ||
| } | ||
| } | ||
| data.release(); | ||
| } | ||
| } catch (EndOfDataDecoderException e) { | ||
| // | ||
| } | ||
| if (chunk instanceof LastHttpContent) { | ||
| readingChunks = false; | ||
| decoder.destroy(); | ||
| decoder = null; | ||
| ctx.fireChannelRead(request); | ||
| } | ||
| } | ||
| } | ||
| } |
83 changes: 83 additions & 0 deletions
83
...k-runtime-web/src/main/java/org/apache/flink/runtime/webmonitor/PipelineErrorHandler.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| /* | ||
| * 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; | ||
|
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| import com.fasterxml.jackson.core.JsonGenerator; | ||
| 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.HttpResponseStatus; | ||
| import io.netty.handler.codec.http.HttpVersion; | ||
| import org.apache.flink.runtime.webmonitor.handlers.JsonFactory; | ||
| import org.slf4j.Logger; | ||
| import org.slf4j.LoggerFactory; | ||
|
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| import java.io.IOException; | ||
| import java.io.StringWriter; | ||
|
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| /** | ||
| * This is the last handler in the pipeline and logs all error messages. | ||
| */ | ||
| @ChannelHandler.Sharable | ||
| public class PipelineErrorHandler extends SimpleChannelInboundHandler<Object> { | ||
|
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| private static final Logger LOG = LoggerFactory.getLogger(PipelineErrorHandler.class); | ||
|
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| @Override | ||
| protected void channelRead0(ChannelHandlerContext ctx, Object message) { | ||
| // we can't deal with this message. No one in the pipeline handled it. Log it. | ||
| LOG.debug("Unknown message received: {}", message); | ||
| sendError(ctx, "Unknown message received."); | ||
| } | ||
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| @Override | ||
| public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) { | ||
| LOG.debug("Unhandled exception: {}", cause); | ||
| sendError(ctx, cause.getMessage()); | ||
| } | ||
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| private void sendError(ChannelHandlerContext ctx, String error) { | ||
| DefaultFullHttpResponse response; | ||
| StringWriter writer = new StringWriter(); | ||
| try { | ||
| JsonGenerator gen = JsonFactory.jacksonFactory.createJsonGenerator(writer); | ||
| gen.writeStartObject(); | ||
| gen.writeStringField("error", error); | ||
| gen.writeEndObject(); | ||
| gen.close(); | ||
| // send a bad request status code. | ||
| response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, | ||
| HttpResponseStatus.BAD_REQUEST, Unpooled.wrappedBuffer(writer.toString().getBytes())); | ||
| response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "application/json"); | ||
| } catch (IOException e) { | ||
| // seriously? Let's just send some plain text. | ||
| response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, | ||
| HttpResponseStatus.BAD_REQUEST, Unpooled.wrappedBuffer(error.getBytes())); | ||
| response.headers().set(HttpHeaders.Names.CONTENT_TYPE, "text/plain"); | ||
| } | ||
| response.headers().set(HttpHeaders.Names.CONTENT_ENCODING, "utf-8"); | ||
| response.headers().set(HttpHeaders.Names.CONTENT_LENGTH, response.content().readableBytes()); | ||
| if (ctx.channel().isActive()) { | ||
| ctx.writeAndFlush(response); | ||
| } | ||
| } | ||
| } |
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