246 lines
7.1 KiB
Java
246 lines
7.1 KiB
Java
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/*
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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 io.gitlab.jfronny.dynres.web.bluemapcore;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashSet;
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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 java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import io.gitlab.jfronny.dynres.web.bluemapcore.HttpConnection.ConnectionClosedException;
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import io.gitlab.jfronny.dynres.web.bluemapcore.HttpConnection.InvalidRequestException;
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public class HttpRequest {
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private static final Pattern REQUEST_PATTERN = Pattern.compile("^(\\w+) (\\S+) (.+)$");
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private String method;
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private String adress;
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private String version;
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private Map<String, Set<String>> header;
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private Map<String, Set<String>> headerLC;
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private byte[] data;
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private String path = null;
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private Map<String, String> getParams = null;
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private String getParamString = null;
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public HttpRequest(String method, String adress, String version, Map<String, Set<String>> header) {
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this.method = method;
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this.adress = adress;
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this.version = version;
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this.header = header;
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this.headerLC = new HashMap<>();
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for (Entry<String, Set<String>> e : header.entrySet()){
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Set<String> values = new HashSet<>();
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for (String v : e.getValue()){
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values.add(v.toLowerCase());
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}
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headerLC.put(e.getKey().toLowerCase(), values);
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}
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this.data = new byte[0];
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}
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public String getMethod() {
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return method;
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}
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public String getAdress(){
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return adress;
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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 Map<String, Set<String>> getHeader() {
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return header;
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}
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public Map<String, Set<String>> getLowercaseHeader() {
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return headerLC;
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}
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public Set<String> getHeader(String key){
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Set<String> headerValues = header.get(key);
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if (headerValues == null) return Collections.emptySet();
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return headerValues;
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}
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public Set<String> getLowercaseHeader(String key){
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Set<String> headerValues = headerLC.get(key.toLowerCase());
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if (headerValues == null) return Collections.emptySet();
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return headerValues;
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}
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public String getPath() {
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if (path == null) parseAdress();
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return path;
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}
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public Map<String, String> getGETParams() {
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if (getParams == null) parseAdress();
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return Collections.unmodifiableMap(getParams);
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}
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public String getGETParamString() {
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if (getParamString == null) parseAdress();
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return getParamString;
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}
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private void parseAdress() {
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String adress = this.adress;
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if (adress.isEmpty()) adress = "/";
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String[] adressParts = adress.split("\\?", 2);
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String path = adressParts[0];
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this.getParamString = adressParts.length > 1 ? adressParts[1] : "";
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Map<String, String> getParams = new HashMap<>();
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for (String getParam : this.getParamString.split("&")){
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if (getParam.isEmpty()) continue;
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String[] kv = getParam.split("=", 2);
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String key = kv[0];
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String value = kv.length > 1 ? kv[1] : "";
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getParams.put(key, value);
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}
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this.path = path;
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this.getParams = getParams;
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}
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public InputStream getData(){
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return new ByteArrayInputStream(data);
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}
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public static HttpRequest read(InputStream in) throws IOException, InvalidRequestException {
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BufferedReader reader = new BufferedReader(new InputStreamReader(in, StandardCharsets.UTF_8));
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List<String> header = new ArrayList<>(20);
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while(header.size() < 1000){
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String headerLine = readLine(reader);
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if (headerLine.isEmpty()) break;
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header.add(headerLine);
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}
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if (header.isEmpty()) throw new InvalidRequestException();
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Matcher m = REQUEST_PATTERN.matcher(header.remove(0));
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if (!m.find()) throw new InvalidRequestException();
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String method = m.group(1);
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if (method == null) throw new InvalidRequestException();
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String adress = m.group(2);
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if (adress == null) throw new InvalidRequestException();
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String version = m.group(3);
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if (version == null) throw new InvalidRequestException();
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Map<String, Set<String>> headerMap = new HashMap<String, Set<String>>();
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for (String line : header){
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if (line.trim().isEmpty()) continue;
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String[] kv = line.split(":", 2);
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if (kv.length < 2) continue;
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Set<String> values = new HashSet<>();
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if (kv[0].trim().equalsIgnoreCase("If-Modified-Since")){
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values.add(kv[1].trim());
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} else {
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for(String v : kv[1].split(",")){
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values.add(v.trim());
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}
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}
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headerMap.put(kv[0].trim(), values);
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}
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HttpRequest request = new HttpRequest(method, adress, version, headerMap);
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if (request.getLowercaseHeader("Transfer-Encoding").contains("chunked")){
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try {
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ByteArrayOutputStream dataStream = new ByteArrayOutputStream();
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while (dataStream.size() < 1000000){
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String hexSize = reader.readLine();
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int chunkSize = Integer.parseInt(hexSize, 16);
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if (chunkSize <= 0) break;
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byte[] data = new byte[chunkSize];
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in.read(data);
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dataStream.write(data);
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}
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if (dataStream.size() >= 1000000) {
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throw new InvalidRequestException();
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}
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request.data = dataStream.toByteArray();
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return request;
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} catch (NumberFormatException ex){
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return request;
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}
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} else {
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Set<String> clSet = request.getLowercaseHeader("Content-Length");
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if (clSet.isEmpty()){
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return request;
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} else {
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try {
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int cl = Integer.parseInt(clSet.iterator().next());
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byte[] data = new byte[cl];
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in.read(data);
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request.data = data;
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return request;
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} catch (NumberFormatException ex){
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return request;
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}
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}
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}
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}
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private static String readLine(BufferedReader in) throws ConnectionClosedException, IOException {
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String line = in.readLine();
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if (line == null){
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throw new ConnectionClosedException();
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}
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return line;
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}
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}
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