Java tutorial
/* * The MIT License * * Copyright 2015 Tim Boudreau * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.mastfrog.acteur.wicket.adapters; import com.google.common.net.MediaType; import com.mastfrog.acteur.headers.Headers; import com.mastfrog.acteur.server.PathFactory; import com.mastfrog.url.Path; import com.mastfrog.util.Exceptions; import io.netty.buffer.ByteBuf; import io.netty.buffer.ByteBufAllocator; import io.netty.channel.ChannelFuture; import io.netty.channel.ChannelFutureListener; import io.netty.handler.codec.http.DefaultCookie; import io.netty.handler.codec.http.DefaultHttpContent; import io.netty.handler.codec.http.HttpResponseStatus; import io.netty.handler.codec.http.LastHttpContent; import java.net.URI; import java.net.URISyntaxException; import java.nio.charset.Charset; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import javax.inject.Inject; import javax.servlet.http.Cookie; import org.apache.wicket.request.http.WebResponse; import org.apache.wicket.util.time.Time; import org.joda.time.DateTime; /** * Wraps an Acteur Response object and exposes it as a Wicket WebResponse * object. * * @author Tim Boudreau */ public class ResponseAdapter extends WebResponse { private final com.mastfrog.acteur.Response resp; private final Charset charset; private CFL cfl; private final ByteBufAllocator alloc; private HttpResponseStatus status; private final PathFactory paths; private boolean redir; boolean flushed; @Inject public ResponseAdapter(com.mastfrog.acteur.Response resp, Charset charset, ByteBufAllocator alloc, PathFactory paths) { this.resp = resp; this.charset = charset; this.alloc = alloc; this.paths = paths; } public HttpResponseStatus status() { return status; } @Override public void write(CharSequence cs) { write(cs.toString().getBytes(charset)); } @Override public void write(byte[] bytes) { CFL cfl = cfl(); cfl.add(bytes); } @Override public void write(byte[] bytes, int offset, int length) { byte[] copy = new byte[length]; System.arraycopy(bytes, offset, copy, 0, length); write(copy); } @Override public String encodeURL(CharSequence cs) { return paths.constructURL(Path.parse(cs.toString()), false).toString(); } @Override public Object getContainerResponse() { return resp; } private CFL cfl() { if (cfl == null) { cfl = new CFL(alloc); resp.setBodyWriter(cfl); } return cfl; } @Override public void addCookie(Cookie cookie) { resp.add(Headers.SET_COOKIE, CookieConverter.INSTANCE.unconvert(cookie)); } @Override public void clearCookie(Cookie cookie) { DefaultCookie ck = (DefaultCookie) CookieConverter.INSTANCE.unconvert(cookie); ck.setDiscard(true); resp.add(Headers.SET_COOKIE, ck); } @Override public void setHeader(String string, String string1) { resp.add(Headers.stringHeader(string), string1); } @Override public void addHeader(String string, String string1) { resp.add(Headers.stringHeader(string), string1); } @Override public void setDateHeader(String string, Time time) { DateTime dt = new DateTime(time.getMilliseconds()); String value = Headers.ISO2822DateFormat.print(dt); addHeader(string, value); } @Override public void setContentLength(long l) { resp.add(Headers.CONTENT_LENGTH, l); } @Override public void setContentType(String string) { resp.add(Headers.CONTENT_TYPE, MediaType.parse(string)); } @Override public void setStatus(int i) { this.status = HttpResponseStatus.valueOf(i); } @Override public void sendError(int i, String string) { this.status = HttpResponseStatus.valueOf(i); resp.setMessage(string); } @Override public String encodeRedirectURL(CharSequence cs) { String s = cs.toString(); if (s.startsWith("http:") || s.startsWith("https:")) { return s; } return paths.constructURL(Path.parse(s), false).toString(); // XXX https } @Override public void sendRedirect(String string) { setStatus(307); try { resp.add(Headers.LOCATION, new URI(encodeRedirectURL(string))); } catch (URISyntaxException ex) { Exceptions.chuck(ex); } redir = true; } @Override public boolean isRedirect() { return redir; } @Override public void flush() { //do nothing flushed = true; } static class CFL implements ChannelFutureListener { private final List<byte[]> bytes = new LinkedList<>(); private Iterator<byte[]> iter; private final ByteBufAllocator alloc; public CFL(ByteBufAllocator alloc) { this.alloc = alloc; } CFL add(byte[] bytes) { if (iter != null) { throw new IllegalStateException("Cannot add bytes to write while content is being written"); } if (bytes.length > 0) { this.bytes.add(bytes); } return this; } @Override public void operationComplete(ChannelFuture f) throws Exception { if (iter == null) { iter = bytes.iterator(); } if (!iter.hasNext()) { f = f.channel().writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT).addListener(CLOSE); bytes.clear(); iter = null; } else { byte[] bytes = iter.next(); ByteBuf buf = alloc.buffer().writeBytes(bytes); f = f.channel().writeAndFlush(new DefaultHttpContent(buf)).addListener(this); } } } }