490 lines
21 KiB
Java
490 lines
21 KiB
Java
/*
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* Copyright 2011 The Netty Project
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*
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* The Netty Project licenses this file to you under the Apache License,
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* version 2.0 (the "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*/
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package io.netty.example.http.upload;
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import java.io.IOException;
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import java.net.URI;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Set;
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import io.netty.buffer.ChannelBuffer;
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import io.netty.buffer.ChannelBuffers;
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import io.netty.channel.Channel;
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import io.netty.channel.ChannelFuture;
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import io.netty.channel.ChannelFutureListener;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelStateEvent;
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import io.netty.channel.Channels;
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import io.netty.channel.ExceptionEvent;
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import io.netty.channel.MessageEvent;
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import io.netty.channel.SimpleChannelUpstreamHandler;
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import io.netty.handler.codec.http.Attribute;
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import io.netty.handler.codec.http.Cookie;
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import io.netty.handler.codec.http.CookieDecoder;
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import io.netty.handler.codec.http.CookieEncoder;
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import io.netty.handler.codec.http.DefaultHttpDataFactory;
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import io.netty.handler.codec.http.DefaultHttpResponse;
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import io.netty.handler.codec.http.DiskAttribute;
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import io.netty.handler.codec.http.DiskFileUpload;
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import io.netty.handler.codec.http.FileUpload;
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import io.netty.handler.codec.http.HttpChunk;
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import io.netty.handler.codec.http.HttpDataFactory;
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import io.netty.handler.codec.http.HttpHeaders;
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import io.netty.handler.codec.http.HttpPostRequestDecoder;
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import io.netty.handler.codec.http.HttpPostRequestDecoder.EndOfDataDecoderException;
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import io.netty.handler.codec.http.HttpPostRequestDecoder.ErrorDataDecoderException;
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import io.netty.handler.codec.http.HttpPostRequestDecoder.IncompatibleDataDecoderException;
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import io.netty.handler.codec.http.HttpPostRequestDecoder.NotEnoughDataDecoderException;
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import io.netty.handler.codec.http.HttpRequest;
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import io.netty.handler.codec.http.HttpResponse;
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import io.netty.handler.codec.http.HttpResponseStatus;
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import io.netty.handler.codec.http.HttpVersion;
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import io.netty.handler.codec.http.InterfaceHttpData;
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import io.netty.handler.codec.http.InterfaceHttpData.HttpDataType;
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import io.netty.handler.codec.http.QueryStringDecoder;
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import io.netty.util.CharsetUtil;
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/**
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*/
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public class HttpRequestHandler extends SimpleChannelUpstreamHandler {
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private volatile HttpRequest request;
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private volatile boolean readingChunks;
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private final StringBuilder responseContent = new StringBuilder();
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private static final HttpDataFactory factory = new DefaultHttpDataFactory(
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DefaultHttpDataFactory.MINSIZE); // Disk if size exceed MINSIZE
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private HttpPostRequestDecoder decoder;
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static {
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DiskFileUpload.deleteOnExitTemporaryFile = true; // should delete file
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// on exit (in normal
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// exit)
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DiskFileUpload.baseDirectory = null; // system temp directory
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DiskAttribute.deleteOnExitTemporaryFile = true; // should delete file on
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// exit (in normal exit)
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DiskAttribute.baseDirectory = null; // system temp directory
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}
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@Override
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public void channelClosed(ChannelHandlerContext ctx, ChannelStateEvent e)
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throws Exception {
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if (decoder != null) {
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decoder.cleanFiles();
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}
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}
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@Override
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public void messageReceived(ChannelHandlerContext ctx, MessageEvent e) throws Exception {
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if (!readingChunks) {
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// clean previous FileUpload if Any
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if (decoder != null) {
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decoder.cleanFiles();
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decoder = null;
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}
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HttpRequest request = this.request = (HttpRequest) e.getMessage();
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URI uri = new URI(request.getUri());
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if (!uri.getPath().startsWith("/form")) {
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// Write Menu
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writeMenu(e);
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return;
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}
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responseContent.setLength(0);
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responseContent.append("WELCOME TO THE WILD WILD WEB SERVER\r\n");
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responseContent.append("===================================\r\n");
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responseContent.append("VERSION: " +
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request.getProtocolVersion().getText() + "\r\n");
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responseContent.append("REQUEST_URI: " + request.getUri() +
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"\r\n\r\n");
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responseContent.append("\r\n\r\n");
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// new method
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List<Entry<String, String>> headers = request.getHeaders();
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for (Entry<String, String> entry: headers) {
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responseContent.append("HEADER: " + entry.getKey() + "=" +
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entry.getValue() + "\r\n");
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}
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responseContent.append("\r\n\r\n");
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// new method
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Set<Cookie> cookies;
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String value = request.getHeader(HttpHeaders.Names.COOKIE);
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if (value == null) {
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cookies = Collections.emptySet();
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} else {
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CookieDecoder decoder = new CookieDecoder();
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cookies = decoder.decode(value);
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}
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for (Cookie cookie: cookies) {
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responseContent.append("COOKIE: " + cookie.toString() + "\r\n");
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}
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responseContent.append("\r\n\r\n");
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QueryStringDecoder decoderQuery = new QueryStringDecoder(request
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.getUri());
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Map<String, List<String>> uriAttributes = decoderQuery
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.getParameters();
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for (String key: uriAttributes.keySet()) {
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for (String valuen: uriAttributes.get(key)) {
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responseContent.append("URI: " + key + "=" + valuen +
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"\r\n");
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}
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}
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responseContent.append("\r\n\r\n");
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// if GET Method: should not try to create a HttpPostRequestDecoder
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try {
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decoder = new HttpPostRequestDecoder(factory, request);
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} catch (ErrorDataDecoderException e1) {
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e1.printStackTrace();
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responseContent.append(e1.getMessage());
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writeResponse(e.getChannel());
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Channels.close(e.getChannel());
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return;
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} catch (IncompatibleDataDecoderException e1) {
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// GET Method: should not try to create a HttpPostRequestDecoder
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// So OK but stop here
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responseContent.append(e1.getMessage());
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responseContent.append("\r\n\r\nEND OF GET CONTENT\r\n");
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writeResponse(e.getChannel());
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return;
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}
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responseContent.append("Is Chunked: " + request.isChunked() +
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"\r\n");
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responseContent.append("IsMultipart: " + decoder.isMultipart() +
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"\r\n");
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if (request.isChunked()) {
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// Chunk version
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responseContent.append("Chunks: ");
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readingChunks = true;
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} else {
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// Not chunk version
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readHttpDataAllReceive(e.getChannel());
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responseContent
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.append("\r\n\r\nEND OF NOT CHUNKED CONTENT\r\n");
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writeResponse(e.getChannel());
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}
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} else {
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// New chunk is received
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HttpChunk chunk = (HttpChunk) e.getMessage();
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try {
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decoder.offer(chunk);
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} catch (ErrorDataDecoderException e1) {
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e1.printStackTrace();
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responseContent.append(e1.getMessage());
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writeResponse(e.getChannel());
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Channels.close(e.getChannel());
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return;
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}
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responseContent.append("o");
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// example of reading chunk by chunk (minimize memory usage due to Factory)
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readHttpDataChunkByChunk(e.getChannel());
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// example of reading only if at the end
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if (chunk.isLast()) {
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readHttpDataAllReceive(e.getChannel());
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writeResponse(e.getChannel());
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readingChunks = false;
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}
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}
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}
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/**
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* Example of reading all InterfaceHttpData from finished transfer
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*
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* @param channel
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*/
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private void readHttpDataAllReceive(Channel channel) {
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List<InterfaceHttpData> datas = null;
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try {
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datas = decoder.getBodyHttpDatas();
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} catch (NotEnoughDataDecoderException e1) {
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// Should not be!
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e1.printStackTrace();
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responseContent.append(e1.getMessage());
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writeResponse(channel);
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Channels.close(channel);
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return;
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}
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for (InterfaceHttpData data: datas) {
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writeHttpData(data);
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}
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responseContent.append("\r\n\r\nEND OF CONTENT AT FINAL END\r\n");
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}
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/**
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* Example of reading request by chunk and getting values from chunk to
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* chunk
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*
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* @param channel
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*/
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private void readHttpDataChunkByChunk(Channel channel) {
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try {
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while (decoder.hasNext()) {
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InterfaceHttpData data = decoder.next();
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if (data != null) {
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// new value
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writeHttpData(data);
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}
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}
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} catch (EndOfDataDecoderException e1) {
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// end
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responseContent
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.append("\r\n\r\nEND OF CONTENT CHUNK BY CHUNK\r\n\r\n");
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}
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}
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private void writeHttpData(InterfaceHttpData data) {
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if (data.getHttpDataType() == HttpDataType.Attribute) {
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Attribute attribute = (Attribute) data;
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String value;
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try {
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value = attribute.getValue();
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} catch (IOException e1) {
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// Error while reading data from File, only print name and error
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e1.printStackTrace();
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responseContent.append("\r\nBODY Attribute: " +
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attribute.getHttpDataType().name() + ": " +
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attribute.getName() + " Error while reading value: " +
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e1.getMessage() + "\r\n");
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return;
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}
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if (value.length() > 100) {
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responseContent.append("\r\nBODY Attribute: " +
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attribute.getHttpDataType().name() + ": " +
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attribute.getName() + " data too long\r\n");
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} else {
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responseContent.append("\r\nBODY Attribute: " +
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attribute.getHttpDataType().name() + ": " +
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attribute.toString() + "\r\n");
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}
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} else {
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responseContent.append("\r\nBODY FileUpload: " +
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data.getHttpDataType().name() + ": " + data.toString() +
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"\r\n");
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if (data.getHttpDataType() == HttpDataType.FileUpload) {
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FileUpload fileUpload = (FileUpload) data;
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if (fileUpload.isCompleted()) {
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if (fileUpload.length() < 10000) {
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responseContent.append("\tContent of file\r\n");
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try {
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responseContent
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.append(((FileUpload) data)
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.getString(((FileUpload) data)
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.getCharset()));
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} catch (IOException e1) {
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// do nothing for the example
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e1.printStackTrace();
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}
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responseContent.append("\r\n");
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} else {
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responseContent
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.append("\tFile too long to be printed out:" +
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fileUpload.length() + "\r\n");
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}
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// fileUpload.isInMemory();// tells if the file is in Memory
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// or on File
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// fileUpload.renameTo(dest); // enable to move into another
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// File dest
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// decoder.removeFileUploadFromClean(fileUpload); //remove
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// the File of to delete file
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} else {
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responseContent
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.append("\tFile to be continued but should not!\r\n");
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}
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}
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}
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}
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private void writeResponse(Channel channel) {
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// Convert the response content to a ChannelBuffer.
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ChannelBuffer buf = ChannelBuffers.copiedBuffer(responseContent
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.toString(), CharsetUtil.UTF_8);
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responseContent.setLength(0);
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// Decide whether to close the connection or not.
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boolean close = HttpHeaders.Values.CLOSE.equalsIgnoreCase(request
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.getHeader(HttpHeaders.Names.CONNECTION)) ||
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request.getProtocolVersion().equals(HttpVersion.HTTP_1_0) &&
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!HttpHeaders.Values.KEEP_ALIVE.equalsIgnoreCase(request
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.getHeader(HttpHeaders.Names.CONNECTION));
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// Build the response object.
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HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1,
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HttpResponseStatus.OK);
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response.setContent(buf);
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response.setHeader(HttpHeaders.Names.CONTENT_TYPE,
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"text/plain; charset=UTF-8");
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if (!close) {
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// There's no need to add 'Content-Length' header
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// if this is the last response.
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response.setHeader(HttpHeaders.Names.CONTENT_LENGTH, String
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.valueOf(buf.readableBytes()));
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}
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Set<Cookie> cookies;
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String value = request.getHeader(HttpHeaders.Names.COOKIE);
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if (value == null) {
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cookies = Collections.emptySet();
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} else {
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CookieDecoder decoder = new CookieDecoder();
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cookies = decoder.decode(value);
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}
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if (!cookies.isEmpty()) {
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// Reset the cookies if necessary.
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CookieEncoder cookieEncoder = new CookieEncoder(true);
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for (Cookie cookie: cookies) {
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cookieEncoder.addCookie(cookie);
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}
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response.addHeader(HttpHeaders.Names.SET_COOKIE, cookieEncoder
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.encode());
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}
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// Write the response.
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ChannelFuture future = channel.write(response);
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// Close the connection after the write operation is done if necessary.
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if (close) {
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future.addListener(ChannelFutureListener.CLOSE);
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}
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}
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private void writeMenu(MessageEvent e) {
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// print several HTML forms
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// Convert the response content to a ChannelBuffer.
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responseContent.setLength(0);
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// create Pseudo Menu
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responseContent.append("<html>");
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responseContent.append("<head>");
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responseContent.append("<title>Netty Test Form</title>\r\n");
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responseContent.append("</head>\r\n");
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responseContent
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.append("<body bgcolor=white><style>td{font-size: 12pt;}</style>");
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responseContent.append("<table border=\"0\">");
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responseContent.append("<tr>");
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responseContent.append("<td>");
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responseContent.append("<h1>Netty Test Form</h1>");
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responseContent.append("Choose one FORM");
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responseContent.append("</td>");
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responseContent.append("</tr>");
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responseContent.append("</table>\r\n");
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// GET
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responseContent
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.append("<CENTER>GET FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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responseContent.append("<FORM ACTION=\"/formget\" METHOD=\"GET\">");
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responseContent
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.append("<input type=hidden name=getform value=\"GET\">");
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responseContent.append("<table border=\"0\">");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
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responseContent
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.append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
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responseContent.append("</td></tr>");
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responseContent
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.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
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responseContent
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.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
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responseContent.append("</table></FORM>\r\n");
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responseContent
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.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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// POST
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responseContent
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.append("<CENTER>POST FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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responseContent.append("<FORM ACTION=\"/formpost\" METHOD=\"POST\">");
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responseContent
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.append("<input type=hidden name=getform value=\"POST\">");
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responseContent.append("<table border=\"0\">");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
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responseContent
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.append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
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responseContent
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.append("<tr><td>Fill with file (only file name will be transmitted): <br> <input type=file name=\"myfile\">");
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responseContent.append("</td></tr>");
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responseContent
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.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
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responseContent
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.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
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responseContent.append("</table></FORM>\r\n");
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responseContent
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.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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// POST with enctype="multipart/form-data"
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responseContent
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.append("<CENTER>POST MULTIPART FORM<HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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responseContent
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.append("<FORM ACTION=\"/formpostmultipart\" ENCTYPE=\"multipart/form-data\" METHOD=\"POST\">");
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responseContent
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.append("<input type=hidden name=getform value=\"POST\">");
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responseContent.append("<table border=\"0\">");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"info\" size=10></td></tr>");
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responseContent
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.append("<tr><td>Fill with value: <br> <input type=text name=\"secondinfo\" size=20>");
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responseContent
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.append("<tr><td>Fill with value: <br> <textarea name=\"thirdinfo\" cols=40 rows=10></textarea>");
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responseContent
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.append("<tr><td>Fill with file: <br> <input type=file name=\"myfile\">");
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responseContent.append("</td></tr>");
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responseContent
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.append("<tr><td><INPUT TYPE=\"submit\" NAME=\"Send\" VALUE=\"Send\"></INPUT></td>");
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responseContent
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.append("<td><INPUT TYPE=\"reset\" NAME=\"Clear\" VALUE=\"Clear\" ></INPUT></td></tr>");
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responseContent.append("</table></FORM>\r\n");
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responseContent
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.append("<CENTER><HR WIDTH=\"75%\" NOSHADE color=\"blue\"></CENTER>");
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responseContent.append("</body>");
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responseContent.append("</html>");
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ChannelBuffer buf = ChannelBuffers.copiedBuffer(responseContent
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.toString(), CharsetUtil.UTF_8);
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// Build the response object.
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HttpResponse response = new DefaultHttpResponse(HttpVersion.HTTP_1_1,
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HttpResponseStatus.OK);
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response.setContent(buf);
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response.setHeader(HttpHeaders.Names.CONTENT_TYPE,
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"text/html; charset=UTF-8");
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response.setHeader(HttpHeaders.Names.CONTENT_LENGTH, String.valueOf(buf
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.readableBytes()));
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// Write the response.
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e.getChannel().write(response);
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}
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, ExceptionEvent e)
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throws Exception {
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e.getCause().printStackTrace();
|
|
System.err.println(responseContent.toString());
|
|
e.getChannel().close();
|
|
}
|
|
}
|