| /* |
| * ==================================================================== |
| * 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.net; |
| |
| import java.nio.ByteBuffer; |
| import java.nio.CharBuffer; |
| import java.nio.charset.Charset; |
| import java.nio.charset.StandardCharsets; |
| import java.util.BitSet; |
| |
| /** |
| * Percent-encoding mechanism defined in RFC 3986 |
| * |
| * @since 5.1 |
| */ |
| public class PercentCodec { |
| |
| static final BitSet GEN_DELIMS = new BitSet(256); |
| static final BitSet SUB_DELIMS = new BitSet(256); |
| static final BitSet UNRESERVED = new BitSet(256); |
| static final BitSet URIC = new BitSet(256); |
| |
| static { |
| GEN_DELIMS.set(':'); |
| GEN_DELIMS.set('/'); |
| GEN_DELIMS.set('?'); |
| GEN_DELIMS.set('#'); |
| GEN_DELIMS.set('['); |
| GEN_DELIMS.set(']'); |
| GEN_DELIMS.set('@'); |
| |
| SUB_DELIMS.set('!'); |
| SUB_DELIMS.set('$'); |
| SUB_DELIMS.set('&'); |
| SUB_DELIMS.set('\''); |
| SUB_DELIMS.set('('); |
| SUB_DELIMS.set(')'); |
| SUB_DELIMS.set('*'); |
| SUB_DELIMS.set('+'); |
| SUB_DELIMS.set(','); |
| SUB_DELIMS.set(';'); |
| SUB_DELIMS.set('='); |
| |
| for (int i = 'a'; i <= 'z'; i++) { |
| UNRESERVED.set(i); |
| } |
| for (int i = 'A'; i <= 'Z'; i++) { |
| UNRESERVED.set(i); |
| } |
| // numeric characters |
| for (int i = '0'; i <= '9'; i++) { |
| UNRESERVED.set(i); |
| } |
| UNRESERVED.set('-'); |
| UNRESERVED.set('.'); |
| UNRESERVED.set('_'); |
| UNRESERVED.set('~'); |
| URIC.or(SUB_DELIMS); |
| URIC.or(UNRESERVED); |
| } |
| |
| private static final int RADIX = 16; |
| |
| static void encode(final StringBuilder buf, final CharSequence content, final Charset charset, |
| final BitSet safechars, final boolean blankAsPlus) { |
| if (content == null) { |
| return; |
| } |
| final CharBuffer cb = CharBuffer.wrap(content); |
| final ByteBuffer bb = (charset != null ? charset : StandardCharsets.UTF_8).encode(cb); |
| while (bb.hasRemaining()) { |
| final int b = bb.get() & 0xff; |
| if (safechars.get(b)) { |
| buf.append((char) b); |
| } else if (blankAsPlus && b == ' ') { |
| buf.append("+"); |
| } else { |
| buf.append("%"); |
| final char hex1 = Character.toUpperCase(Character.forDigit((b >> 4) & 0xF, RADIX)); |
| final char hex2 = Character.toUpperCase(Character.forDigit(b & 0xF, RADIX)); |
| buf.append(hex1); |
| buf.append(hex2); |
| } |
| } |
| } |
| |
| static void encode(final StringBuilder buf, final CharSequence content, final Charset charset, final boolean blankAsPlus) { |
| encode(buf, content, charset, UNRESERVED, blankAsPlus); |
| } |
| |
| public static void encode(final StringBuilder buf, final CharSequence content, final Charset charset) { |
| encode(buf, content, charset, UNRESERVED, false); |
| } |
| |
| public static String encode(final CharSequence content, final Charset charset) { |
| if (content == null) { |
| return null; |
| } |
| final StringBuilder buf = new StringBuilder(); |
| encode(buf, content, charset, UNRESERVED, false); |
| return buf.toString(); |
| } |
| |
| static String decode(final CharSequence content, final Charset charset, final boolean plusAsBlank) { |
| if (content == null) { |
| return null; |
| } |
| final ByteBuffer bb = ByteBuffer.allocate(content.length()); |
| final CharBuffer cb = CharBuffer.wrap(content); |
| while (cb.hasRemaining()) { |
| final char c = cb.get(); |
| if (c == '%' && cb.remaining() >= 2) { |
| final char uc = cb.get(); |
| final char lc = cb.get(); |
| final int u = Character.digit(uc, RADIX); |
| final int l = Character.digit(lc, RADIX); |
| if (u != -1 && l != -1) { |
| bb.put((byte) ((u << 4) + l)); |
| } else { |
| bb.put((byte) '%'); |
| bb.put((byte) uc); |
| bb.put((byte) lc); |
| } |
| } else if (plusAsBlank && c == '+') { |
| bb.put((byte) ' '); |
| } else { |
| bb.put((byte) c); |
| } |
| } |
| bb.flip(); |
| return (charset != null ? charset : StandardCharsets.UTF_8).decode(bb).toString(); |
| } |
| |
| public static String decode(final CharSequence content, final Charset charset) { |
| return decode(content, charset, false); |
| } |
| |
| } |