| /* |
| * ==================================================================== |
| * 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. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| * |
| */ |
| |
| package org.apache.hc.core5.http; |
| |
| import org.apache.hc.core5.annotation.Internal; |
| import org.apache.hc.core5.util.TextUtils; |
| import org.apache.hc.core5.util.Tokenizer; |
| |
| @Internal |
| public class ProtocolVersionParser { |
| |
| public final static ProtocolVersionParser INSTANCE = new ProtocolVersionParser(); |
| |
| private static final char SLASH = '/'; |
| private static final char FULL_STOP = '.'; |
| private static final Tokenizer.Delimiter PROTO_DELIMITER = Tokenizer.delimiters(SLASH); |
| private static final Tokenizer.Delimiter FULL_STOP_OR_BLANK = Tokenizer.delimiters(FULL_STOP, ' ', '\t'); |
| private static final Tokenizer.Delimiter BLANK = Tokenizer.delimiters(' ', '\t'); |
| private final Tokenizer tokenizer; |
| |
| public ProtocolVersionParser() { |
| this.tokenizer = Tokenizer.INSTANCE; |
| } |
| |
| @Internal |
| @FunctionalInterface |
| public interface Factory { |
| |
| ProtocolVersion create(int major, int minor); |
| |
| } |
| |
| public ProtocolVersion parse( |
| final String protocol, |
| final Factory factory, |
| final CharSequence buffer, |
| final Tokenizer.Cursor cursor, |
| final Tokenizer.Delimiter delimiterPredicate) throws ParseException { |
| final int lowerBound = cursor.getLowerBound(); |
| final int upperBound = cursor.getUpperBound(); |
| final String token1 = tokenizer.parseToken(buffer, cursor, |
| delimiterPredicate != null ? (ch) -> delimiterPredicate.test(ch) || FULL_STOP_OR_BLANK.test(ch) : FULL_STOP_OR_BLANK); |
| final int major; |
| try { |
| major = Integer.parseInt(token1); |
| } catch (final NumberFormatException e) { |
| throw new ParseException("Invalid " + protocol + " major version number", |
| buffer, lowerBound, upperBound, cursor.getPos()); |
| } |
| if (cursor.atEnd()) { |
| return factory != null ? factory.create(major, major) : new ProtocolVersion(protocol, major, 0); |
| } |
| if (buffer.charAt(cursor.getPos()) != FULL_STOP) { |
| return factory != null ? factory.create(major, major) : new ProtocolVersion(protocol, major, 0); |
| } else { |
| cursor.updatePos(cursor.getPos() + 1); |
| final String token2 = tokenizer.parseToken(buffer, cursor, |
| delimiterPredicate != null ? (ch) -> delimiterPredicate.test(ch) || BLANK.test(ch) : BLANK); |
| final int minor; |
| try { |
| minor = Integer.parseInt(token2); |
| } catch (final NumberFormatException e) { |
| throw new ParseException("Invalid " + protocol + " minor version number", |
| buffer, lowerBound, upperBound, cursor.getPos()); |
| } |
| return factory != null ? factory.create(major, minor) : new ProtocolVersion(protocol, major, minor); |
| } |
| } |
| |
| public ProtocolVersion parse( |
| final String protocol, |
| final CharSequence buffer, |
| final Tokenizer.Cursor cursor, |
| final Tokenizer.Delimiter delimiterPredicate) throws ParseException { |
| return parse(protocol, null, buffer, cursor, delimiterPredicate); |
| } |
| |
| public ProtocolVersion parse( |
| final String protocol, |
| final CharSequence buffer, |
| final Tokenizer.Cursor cursor) throws ParseException { |
| return parse(protocol, null, buffer, cursor, null); |
| } |
| |
| public ProtocolVersion parse( |
| final CharSequence buffer, |
| final Tokenizer.Cursor cursor, |
| final Tokenizer.Delimiter delimiterPredicate) throws ParseException { |
| tokenizer.skipWhiteSpace(buffer, cursor); |
| final String proto = tokenizer.parseToken(buffer, cursor, PROTO_DELIMITER); |
| if (TextUtils.isBlank(proto)) { |
| throw new ParseException("Invalid protocol name"); |
| } |
| if (!cursor.atEnd() && buffer.charAt(cursor.getPos()) == SLASH) { |
| cursor.updatePos(cursor.getPos() + 1); |
| return parse(proto, null, buffer, cursor, delimiterPredicate); |
| } else { |
| throw new ParseException("Invalid protocol name"); |
| } |
| } |
| |
| } |