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• FriendlyURLNormalizerImpl.java

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com.liferay.friendly.url.internal.util.FriendlyURLNormalizerImpl Maven / Gradle / Ivy

/**
 * SPDX-FileCopyrightText: (c) 2000 Liferay, Inc. https://liferay.com
 * SPDX-License-Identifier: LGPL-2.1-or-later OR LicenseRef-Liferay-DXP-EULA-2.0.0-2023-06
 */

package com.liferay.friendly.url.internal.util;

import com.liferay.normalizer.Normalizer;
import com.liferay.petra.nio.CharsetEncoderUtil;
import com.liferay.petra.string.CharPool;
import com.liferay.petra.string.StringPool;
import com.liferay.portal.kernel.util.FriendlyURLNormalizer;
import com.liferay.portal.kernel.util.HttpComponentsUtil;
import com.liferay.portal.kernel.util.StringUtil;
import com.liferay.portal.kernel.util.Validator;

import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.charset.CharsetEncoder;

import java.util.Arrays;

import org.osgi.service.component.annotations.Component;
import org.osgi.service.component.annotations.Reference;

/**
 * @author Brian Wing Shun Chan
 * @author Shuyang Zhou
 */
@Component(
	property = "service.ranking:Integer=100",
	service = FriendlyURLNormalizer.class
)
public class FriendlyURLNormalizerImpl implements FriendlyURLNormalizer {

	@Override
	public String normalize(String friendlyURL) {
		return _normalize(friendlyURL, false, false);
	}

	@Override
	public String normalizeWithEncoding(String friendlyURL) {
		return _normalizeWithEncoding(friendlyURL, false, false);
	}

	@Override
	public String normalizeWithEncodingPeriodsAndSlashes(String friendlyURL) {
		return _normalizeWithEncoding(friendlyURL, true, true);
	}

	@Override
	public String normalizeWithPeriods(String friendlyURL) {
		return _normalize(friendlyURL, true, false);
	}

	@Override
	public String normalizeWithPeriodsAndSlashes(String friendlyURL) {
		return _normalize(friendlyURL, true, true);
	}

	private String _normalize(
		String friendlyURL, boolean periods, boolean slashes) {

		if (Validator.isNull(friendlyURL)) {
			return friendlyURL;
		}

		friendlyURL = _normalizer.normalizeToAscii(friendlyURL);

		StringBuilder sb = new StringBuilder(friendlyURL.length());

		boolean modified = false;

		for (int i = 0; i < friendlyURL.length(); i++) {
			char c = friendlyURL.charAt(i);

			if ((CharPool.UPPER_CASE_A <= c) && (c <= CharPool.UPPER_CASE_Z)) {
				sb.append((char)(c + 32));

				modified = true;
			}
			else if (((CharPool.LOWER_CASE_A <= c) &&
					  (c <= CharPool.LOWER_CASE_Z)) ||
					 ((CharPool.NUMBER_0 <= c) && (c <= CharPool.NUMBER_9)) ||
					 (c == CharPool.UNDERLINE) ||
					 (!periods && (c == CharPool.PERIOD)) ||
					 (!slashes && (c == CharPool.SLASH))) {

				sb.append(c);
			}
			else {
				if ((i == 0) || (CharPool.DASH != sb.charAt(sb.length() - 1))) {
					sb.append(CharPool.DASH);

					if (c != CharPool.DASH) {
						modified = true;
					}
				}
				else {
					modified = true;
				}
			}
		}

		if (modified) {
			return sb.toString();
		}

		return friendlyURL;
	}

	private String _normalizeWithEncoding(
		String friendlyURL, boolean periods, boolean slashes) {

		if (Validator.isNull(friendlyURL)) {
			return friendlyURL;
		}

		String decodedFriendlyURL = HttpComponentsUtil.decodePath(friendlyURL);

		if (Validator.isNull(decodedFriendlyURL)) {
			decodedFriendlyURL = HttpComponentsUtil.decodePath(
				StringUtil.replace(
					friendlyURL, CharPool.PERCENT, CharPool.POUND));
		}

		StringBuilder sb = new StringBuilder(decodedFriendlyURL.length());

		boolean modified = false;

		ByteBuffer byteBuffer = null;
		CharBuffer charBuffer = null;

		CharsetEncoder charsetEncoder = null;

		for (int i = 0; i < decodedFriendlyURL.length(); i++) {
			char c = decodedFriendlyURL.charAt(i);

			if ((CharPool.UPPER_CASE_A <= c) && (c <= CharPool.UPPER_CASE_Z)) {
				sb.append((char)(c + 32));

				modified = true;
			}
			else if (((CharPool.LOWER_CASE_A <= c) &&
					  (c <= CharPool.LOWER_CASE_Z)) ||
					 ((CharPool.NUMBER_0 <= c) && (c <= CharPool.NUMBER_9)) ||
					 (!periods && (c == CharPool.PERIOD)) ||
					 (!slashes && (c == CharPool.SLASH)) ||
					 (c == CharPool.STAR) || (c == CharPool.UNDERLINE)) {

				sb.append(c);
			}
			else if (Arrays.binarySearch(_REPLACE_CHARS, c) >= 0) {
				if ((i == 0) || (CharPool.DASH != sb.charAt(sb.length() - 1))) {
					sb.append(CharPool.DASH);

					if (c != CharPool.DASH) {
						modified = true;
					}
				}
				else {
					modified = true;
				}
			}
			else {
				if ((periods && (c == CharPool.PERIOD)) ||
					(slashes && (c == CharPool.SLASH))) {

					if ((i == 0) ||
						(CharPool.DASH != sb.charAt(sb.length() - 1))) {

						sb.append(CharPool.DASH);

						if (c != CharPool.DASH) {
							modified = true;
						}
					}
					else {
						modified = true;
					}
				}
				else {
					c = Character.toLowerCase(c);

					if (charsetEncoder == null) {
						charsetEncoder = CharsetEncoderUtil.getCharsetEncoder(
							StringPool.UTF8);

						byteBuffer = ByteBuffer.allocate(4);
						charBuffer = CharBuffer.allocate(2);
					}
					else {
						byteBuffer.clear();
						charBuffer.clear();
					}

					charBuffer.put(c);

					boolean endOfInput = false;

					if ((decodedFriendlyURL.length() - 1) == i) {
						endOfInput = true;
					}

					if (Character.isHighSurrogate(c) &&
						((i + 1) < decodedFriendlyURL.length())) {

						c = decodedFriendlyURL.charAt(i + 1);

						if (Character.isLowSurrogate(c)) {
							charBuffer.put(c);

							i++;
						}
						else {
							endOfInput = true;
						}
					}

					charBuffer.flip();

					charsetEncoder.encode(charBuffer, byteBuffer, endOfInput);

					byteBuffer.flip();

					while (byteBuffer.hasRemaining()) {
						byte b = byteBuffer.get();

						sb.append(CharPool.PERCENT);
						sb.append(_HEX_DIGITS[(b >> 4) & 0x0F]);
						sb.append(_HEX_DIGITS[b & 0x0F]);
					}

					if (endOfInput) {
						charsetEncoder.flush(byteBuffer);

						charsetEncoder.reset();
					}

					modified = true;
				}
			}
		}

		if (modified) {
			return sb.toString();
		}

		return friendlyURL;
	}

	private static final char[] _HEX_DIGITS = {
		'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D',
		'E', 'F'
	};

	private static final char[] _REPLACE_CHARS;

	static {
		char[] replaceChars = {
			'-', ' ', ',', '\\', '\'', '\"', '(', ')', '[', ']', '{', '}', '?',
			'#', '@', '+', '~', ';', '$', '!', '=', ':', '&', '\u00a3',
			'\u2013', '\u2014', '\u2018', '\u2019', '\u201c', '\u201d'
		};

		Arrays.sort(replaceChars);

		_REPLACE_CHARS = replaceChars;
	}

	@Reference
	private Normalizer _normalizer;

}