211 lines
6.8 KiB
Java
211 lines
6.8 KiB
Java
/*
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* This file is part of BlueMap, licensed under the MIT License (MIT).
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*
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* Copyright (c) Blue (Lukas Rieger) <https://bluecolored.de>
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* Copyright (c) contributors
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package de.bluecolored.bluemap.common.web.http;
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import java.io.*;
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import java.nio.ByteBuffer;
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import java.nio.channels.Channels;
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import java.nio.channels.ReadableByteChannel;
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import java.nio.channels.WritableByteChannel;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.Locale;
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import java.util.Map;
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public class HttpResponse implements Closeable {
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private static final byte[] CHUNK_SUFFIX = "\r\n".getBytes(StandardCharsets.UTF_8);
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private String version;
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private HttpStatusCode statusCode;
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private final Map<String, HttpHeader> headers;
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private ReadableByteChannel data;
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private ByteBuffer headerData;
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private ByteBuffer dataBuffer;
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private boolean complete = false;
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private boolean headerComplete = false;
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private boolean dataChannelComplete = false;
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private boolean dataComplete = false;
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public HttpResponse(HttpStatusCode statusCode) {
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this.version = "HTTP/1.1";
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this.statusCode = statusCode;
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this.headers = new HashMap<>();
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}
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public boolean read(WritableByteChannel channel) throws IOException {
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if (complete) return true;
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// send headers
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if (!headerComplete) {
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if (headerData == null) writeHeaderData();
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if (headerData.hasRemaining()) {
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channel.write(headerData);
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}
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if (headerData.hasRemaining()) return false;
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headerComplete = true;
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headerData = null; // free ram
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}
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if (!hasData()){
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complete = true;
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return true;
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}
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// send data chunked
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if (dataBuffer == null) dataBuffer = ByteBuffer.allocate(1024 + 200).flip(); // 200 extra bytes
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while (true) {
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if (dataBuffer.hasRemaining()) channel.write(dataBuffer);
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if (dataBuffer.hasRemaining()) return false;
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if (dataComplete) break; // nothing more to do
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// fill data buffer from channel
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dataBuffer.clear();
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dataBuffer.position(100); // keep 100 space in front
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dataBuffer.limit(1124); // keep 100 space at the end
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int readTotal = 0;
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if (!dataChannelComplete) {
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int read = 0;
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while (dataBuffer.hasRemaining() && (read = data.read(dataBuffer)) != -1) {
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readTotal += read;
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}
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if (read == -1) dataChannelComplete = true;
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}
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if (readTotal == 0) dataComplete = true;
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byte[] chunkPrefix = (Integer.toHexString(readTotal) + "\r\n")
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.getBytes(StandardCharsets.UTF_8);
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dataBuffer.limit(dataBuffer.capacity());
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dataBuffer.put(CHUNK_SUFFIX);
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dataBuffer.limit(dataBuffer.position());
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int startPos = 100 - chunkPrefix.length;
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dataBuffer.position(startPos);
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dataBuffer.put(chunkPrefix);
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dataBuffer.position(startPos);
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}
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complete = true;
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return true;
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}
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private void writeHeaderData() {
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ByteArrayOutputStream headerDataOut = new ByteArrayOutputStream();
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if (hasData()){
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headers.put("Transfer-Encoding", new HttpHeader("Transfer-Encoding", "chunked"));
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} else {
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headers.put("Content-Length", new HttpHeader("Content-Length", "0"));
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}
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headerDataOut.writeBytes((version + " " + statusCode.getCode() + " " + statusCode.getMessage() + "\r\n")
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.getBytes(StandardCharsets.UTF_8));
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for (HttpHeader header : headers.values()){
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headerDataOut.writeBytes((header.getKey() + ": " + header.getValue() + "\r\n")
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.getBytes(StandardCharsets.UTF_8));
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}
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headerDataOut.writeBytes(("\r\n")
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.getBytes(StandardCharsets.UTF_8));
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headerData = ByteBuffer.allocate(headerDataOut.size())
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.put(headerDataOut.toByteArray())
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.flip();
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}
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public void addHeader(String key, String value){
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HttpHeader header;
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HttpHeader existing = getHeader(key);
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if (existing != null) {
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header = new HttpHeader(existing.getKey(), existing.getValue() + ", " + value);
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} else {
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header = new HttpHeader(key, value);
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}
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this.headers.put(key.toLowerCase(Locale.ROOT), header);
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}
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public void setData(ReadableByteChannel channel){
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this.data = channel;
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}
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public void setData(InputStream dataStream){
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this.data = Channels.newChannel(dataStream);
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}
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public void setData(String data){
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setData(new ByteArrayInputStream(data.getBytes(StandardCharsets.UTF_8)));
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}
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public boolean hasData() {
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return this.data != null;
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}
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public boolean isComplete() {
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return complete;
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}
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@Override
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public void close() throws IOException {
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if (data != null) data.close();
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}
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public HttpStatusCode getStatusCode(){
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return statusCode;
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}
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public void setStatusCode(HttpStatusCode statusCode) {
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this.statusCode = statusCode;
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}
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public String getVersion() {
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return version;
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}
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public void setVersion(String version) {
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this.version = version;
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}
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public Map<String, HttpHeader> getHeaders() {
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return headers;
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}
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public HttpHeader getHeader(String header) {
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return this.headers.get(header.toLowerCase(Locale.ROOT));
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}
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public boolean hasHeaderValue(String key, String value) {
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HttpHeader header = getHeader(key);
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if (header == null) return false;
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return header.contains(value);
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}
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}
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