From f06ff492f18d7c9cdf861a79293279e5ed55823f Mon Sep 17 00:00:00 2001
From: Michal Srb <msrb@redhat.com>
Date: Fri, 26 Apr 2013 07:32:04 +0200
Subject: [PATCH 2/2] Replace bundled gdata-java-client classes with
commons-codec
---
.../gdata/util/common/base/Escaper.java | 97 ----
.../util/common/base/PercentEscaper.java | 281 ----------
.../util/common/base/UnicodeEscaper.java | 506 ------------------
.../org/yaml/snakeyaml/util/UriEncoder.java | 37 +-
4 files changed, 28 insertions(+), 893 deletions(-)
delete mode 100644 src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/Escaper.java
delete mode 100644 src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/PercentEscaper.java
delete mode 100644 src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/UnicodeEscaper.java
diff --git a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/Escaper.java b/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/Escaper.java
deleted file mode 100644
index c26e3cb..0000000
--- a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/Escaper.java
+++ /dev/null
@@ -1,97 +0,0 @@
-/* Copyright (c) 2008 Google Inc.
- *
- * Licensed 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.
- */
-
-package org.yaml.snakeyaml.external.com.google.gdata.util.common.base;
-
-/**
- * An object that converts literal text into a format safe for inclusion in a
- * particular context (such as an XML document). Typically (but not always), the
- * inverse process of "unescaping" the text is performed automatically by the
- * relevant parser.
- *
- * <p>
- * For example, an XML escaper would convert the literal string
- * {@code "Foo<Bar>"} into {@code "Foo<Bar>"} to prevent {@code "<Bar>"}
- * from being confused with an XML tag. When the resulting XML document is
- * parsed, the parser API will return this text as the original literal string
- * {@code "Foo<Bar>"}.
- *
- * <p>
- * An {@code Escaper} instance is required to be stateless, and safe when used
- * concurrently by multiple threads.
- *
- * <p>
- * Several popular escapers are defined as constants in the class
- * {@link CharEscapers}. To create your own escapers, use
- * {@link CharEscaperBuilder}, or extend {@link CharEscaper} or
- * {@code UnicodeEscaper}.
- *
- *
- */
-public interface Escaper {
- /**
- * Returns the escaped form of a given literal string.
- *
- * <p>
- * Note that this method may treat input characters differently depending on
- * the specific escaper implementation.
- * <ul>
- * <li>{@link UnicodeEscaper} handles <a
- * href="http://en.wikipedia.org/wiki/UTF-16">UTF-16</a> correctly,
- * including surrogate character pairs. If the input is badly formed the
- * escaper should throw {@link IllegalArgumentException}.
- * <li>{@link CharEscaper} handles Java characters independently and does
- * not verify the input for well formed characters. A CharEscaper should not
- * be used in situations where input is not guaranteed to be restricted to
- * the Basic Multilingual Plane (BMP).
- * </ul>
- *
- * @param string
- * the literal string to be escaped
- * @return the escaped form of {@code string}
- * @throws NullPointerException
- * if {@code string} is null
- * @throws IllegalArgumentException
- * if {@code string} contains badly formed UTF-16 or cannot be
- * escaped for any other reason
- */
- public String escape(String string);
-
- /**
- * Returns an {@code Appendable} instance which automatically escapes all
- * text appended to it before passing the resulting text to an underlying
- * {@code Appendable}.
- *
- * <p>
- * Note that this method may treat input characters differently depending on
- * the specific escaper implementation.
- * <ul>
- * <li>{@link UnicodeEscaper} handles <a
- * href="http://en.wikipedia.org/wiki/UTF-16">UTF-16</a> correctly,
- * including surrogate character pairs. If the input is badly formed the
- * escaper should throw {@link IllegalArgumentException}.
- * <li>{@link CharEscaper} handles Java characters independently and does
- * not verify the input for well formed characters. A CharEscaper should not
- * be used in situations where input is not guaranteed to be restricted to
- * the Basic Multilingual Plane (BMP).
- * </ul>
- *
- * @param out
- * the underlying {@code Appendable} to append escaped output to
- * @return an {@code Appendable} which passes text to {@code out} after
- * escaping it.
- */
- public Appendable escape(Appendable out);
-}
diff --git a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/PercentEscaper.java b/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/PercentEscaper.java
deleted file mode 100644
index 5e2f902..0000000
--- a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/PercentEscaper.java
+++ /dev/null
@@ -1,281 +0,0 @@
-/* Copyright (c) 2008 Google Inc.
- *
- * Licensed 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.
- */
-
-package org.yaml.snakeyaml.external.com.google.gdata.util.common.base;
-
-/**
- * A {@code UnicodeEscaper} that escapes some set of Java characters using the
- * URI percent encoding scheme. The set of safe characters (those which remain
- * unescaped) can be specified on construction.
- *
- * <p>
- * For details on escaping URIs for use in web pages, see section 2.4 of <a
- * href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986</a>.
- *
- * <p>
- * In most cases this class should not need to be used directly. If you have no
- * special requirements for escaping your URIs, you should use either
- * {@link CharEscapers#uriEscaper()} or {@link CharEscapers#uriEscaper(boolean)}.
- *
- * <p>
- * When encoding a String, the following rules apply:
- * <ul>
- * <li>The alphanumeric characters "a" through "z", "A" through "Z" and "0"
- * through "9" remain the same.
- * <li>Any additionally specified safe characters remain the same.
- * <li>If {@code plusForSpace} was specified, the space character " " is
- * converted into a plus sign "+".
- * <li>All other characters are converted into one or more bytes using UTF-8
- * encoding and each byte is then represented by the 3-character string "%XY",
- * where "XY" is the two-digit, uppercase, hexadecimal representation of the
- * byte value.
- * </ul>
- *
- * <p>
- * RFC 2396 specifies the set of unreserved characters as "-", "_", ".", "!",
- * "~", "*", "'", "(" and ")". It goes on to state:
- *
- * <p>
- * <i>Unreserved characters can be escaped without changing the semantics of the
- * URI, but this should not be done unless the URI is being used in a context
- * that does not allow the unescaped character to appear.</i>
- *
- * <p>
- * For performance reasons the only currently supported character encoding of
- * this class is UTF-8.
- *
- * <p>
- * <b>Note</b>: This escaper produces uppercase hexidecimal sequences. From <a
- * href="http://www.ietf.org/rfc/rfc3986.txt">RFC 3986</a>:<br>
- * <i>"URI producers and normalizers should use uppercase hexadecimal digits for
- * all percent-encodings."</i>
- *
- *
- */
-public class PercentEscaper extends UnicodeEscaper {
- /**
- * A string of safe characters that mimics the behavior of
- * {@link java.net.URLEncoder}.
- *
- */
- public static final String SAFECHARS_URLENCODER = "-_.*";
-
- /**
- * A string of characters that do not need to be encoded when used in URI
- * path segments, as specified in RFC 3986. Note that some of these
- * characters do need to be escaped when used in other parts of the URI.
- */
- public static final String SAFEPATHCHARS_URLENCODER = "-_.!~*'()@:$&,;=";
-
- /**
- * A string of characters that do not need to be encoded when used in URI
- * query strings, as specified in RFC 3986. Note that some of these
- * characters do need to be escaped when used in other parts of the URI.
- */
- public static final String SAFEQUERYSTRINGCHARS_URLENCODER = "-_.!~*'()@:$,;/?:";
-
- // In some uri escapers spaces are escaped to '+'
- private static final char[] URI_ESCAPED_SPACE = { '+' };
-
- private static final char[] UPPER_HEX_DIGITS = "0123456789ABCDEF".toCharArray();
-
- /**
- * If true we should convert space to the {@code +} character.
- */
- private final boolean plusForSpace;
-
- /**
- * An array of flags where for any {@code char c} if {@code safeOctets[c]}
- * is true then {@code c} should remain unmodified in the output. If
- * {@code c > safeOctets.length} then it should be escaped.
- */
- private final boolean[] safeOctets;
-
- /**
- * Constructs a URI escaper with the specified safe characters and optional
- * handling of the space character.
- *
- * @param safeChars
- * a non null string specifying additional safe characters for
- * this escaper (the ranges 0..9, a..z and A..Z are always safe
- * and should not be specified here)
- * @param plusForSpace
- * true if ASCII space should be escaped to {@code +} rather than
- * {@code %20}
- * @throws IllegalArgumentException
- * if any of the parameters were invalid
- */
- public PercentEscaper(String safeChars, boolean plusForSpace) {
- // Avoid any misunderstandings about the behavior of this escaper
- if (safeChars.matches(".*[0-9A-Za-z].*")) {
- throw new IllegalArgumentException(
- "Alphanumeric characters are always 'safe' and should not be "
- + "explicitly specified");
- }
- // Avoid ambiguous parameters. Safe characters are never modified so if
- // space is a safe character then setting plusForSpace is meaningless.
- if (plusForSpace && safeChars.contains(" ")) {
- throw new IllegalArgumentException(
- "plusForSpace cannot be specified when space is a 'safe' character");
- }
- if (safeChars.contains("%")) {
- throw new IllegalArgumentException("The '%' character cannot be specified as 'safe'");
- }
- this.plusForSpace = plusForSpace;
- this.safeOctets = createSafeOctets(safeChars);
- }
-
- /**
- * Creates a boolean[] with entries corresponding to the character values
- * for 0-9, A-Z, a-z and those specified in safeChars set to true. The array
- * is as small as is required to hold the given character information.
- */
- private static boolean[] createSafeOctets(String safeChars) {
- int maxChar = 'z';
- char[] safeCharArray = safeChars.toCharArray();
- for (char c : safeCharArray) {
- maxChar = Math.max(c, maxChar);
- }
- boolean[] octets = new boolean[maxChar + 1];
- for (int c = '0'; c <= '9'; c++) {
- octets[c] = true;
- }
- for (int c = 'A'; c <= 'Z'; c++) {
- octets[c] = true;
- }
- for (int c = 'a'; c <= 'z'; c++) {
- octets[c] = true;
- }
- for (char c : safeCharArray) {
- octets[c] = true;
- }
- return octets;
- }
-
- /*
- * Overridden for performance. For unescaped strings this improved the
- * performance of the uri escaper from ~760ns to ~400ns as measured by
- * {@link CharEscapersBenchmark}.
- */
- @Override
- protected int nextEscapeIndex(CharSequence csq, int index, int end) {
- for (; index < end; index++) {
- char c = csq.charAt(index);
- if (c >= safeOctets.length || !safeOctets[c]) {
- break;
- }
- }
- return index;
- }
-
- /*
- * Overridden for performance. For unescaped strings this improved the
- * performance of the uri escaper from ~400ns to ~170ns as measured by
- * {@link CharEscapersBenchmark}.
- */
- @Override
- public String escape(String s) {
- int slen = s.length();
- for (int index = 0; index < slen; index++) {
- char c = s.charAt(index);
- if (c >= safeOctets.length || !safeOctets[c]) {
- return escapeSlow(s, index);
- }
- }
- return s;
- }
-
- /**
- * Escapes the given Unicode code point in UTF-8.
- */
- @Override
- protected char[] escape(int cp) {
- // We should never get negative values here but if we do it will throw
- // an
- // IndexOutOfBoundsException, so at least it will get spotted.
- if (cp < safeOctets.length && safeOctets[cp]) {
- return null;
- } else if (cp == ' ' && plusForSpace) {
- return URI_ESCAPED_SPACE;
- } else if (cp <= 0x7F) {
- // Single byte UTF-8 characters
- // Start with "%--" and fill in the blanks
- char[] dest = new char[3];
- dest[0] = '%';
- dest[2] = UPPER_HEX_DIGITS[cp & 0xF];
- dest[1] = UPPER_HEX_DIGITS[cp >>> 4];
- return dest;
- } else if (cp <= 0x7ff) {
- // Two byte UTF-8 characters [cp >= 0x80 && cp <= 0x7ff]
- // Start with "%--%--" and fill in the blanks
- char[] dest = new char[6];
- dest[0] = '%';
- dest[3] = '%';
- dest[5] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[4] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[2] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[1] = UPPER_HEX_DIGITS[0xC | cp];
- return dest;
- } else if (cp <= 0xffff) {
- // Three byte UTF-8 characters [cp >= 0x800 && cp <= 0xffff]
- // Start with "%E-%--%--" and fill in the blanks
- char[] dest = new char[9];
- dest[0] = '%';
- dest[1] = 'E';
- dest[3] = '%';
- dest[6] = '%';
- dest[8] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[7] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[5] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[4] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[2] = UPPER_HEX_DIGITS[cp];
- return dest;
- } else if (cp <= 0x10ffff) {
- char[] dest = new char[12];
- // Four byte UTF-8 characters [cp >= 0xffff && cp <= 0x10ffff]
- // Start with "%F-%--%--%--" and fill in the blanks
- dest[0] = '%';
- dest[1] = 'F';
- dest[3] = '%';
- dest[6] = '%';
- dest[9] = '%';
- dest[11] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[10] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[8] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[7] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[5] = UPPER_HEX_DIGITS[cp & 0xF];
- cp >>>= 4;
- dest[4] = UPPER_HEX_DIGITS[0x8 | (cp & 0x3)];
- cp >>>= 2;
- dest[2] = UPPER_HEX_DIGITS[cp & 0x7];
- return dest;
- } else {
- // If this ever happens it is due to bug in UnicodeEscaper, not bad
- // input.
- throw new IllegalArgumentException("Invalid unicode character value " + cp);
- }
- }
-}
diff --git a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/UnicodeEscaper.java b/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/UnicodeEscaper.java
deleted file mode 100644
index 5403185..0000000
--- a/src/main/java/org/yaml/snakeyaml/external/com/google/gdata/util/common/base/UnicodeEscaper.java
+++ /dev/null
@@ -1,506 +0,0 @@
-/* Copyright (c) 2008 Google Inc.
- *
- * Licensed 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.
- */
-
-package org.yaml.snakeyaml.external.com.google.gdata.util.common.base;
-
-import java.io.IOException;
-
-/**
- * An {@link Escaper} that converts literal text into a format safe for
- * inclusion in a particular context (such as an XML document). Typically (but
- * not always), the inverse process of "unescaping" the text is performed
- * automatically by the relevant parser.
- *
- * <p>
- * For example, an XML escaper would convert the literal string
- * {@code "Foo<Bar>"} into {@code "Foo<Bar>"} to prevent {@code "<Bar>"}
- * from being confused with an XML tag. When the resulting XML document is
- * parsed, the parser API will return this text as the original literal string
- * {@code "Foo<Bar>"}.
- *
- * <p>
- * <b>Note:</b> This class is similar to {@link CharEscaper} but with one very
- * important difference. A CharEscaper can only process Java <a
- * href="http://en.wikipedia.org/wiki/UTF-16">UTF16</a> characters in isolation
- * and may not cope when it encounters surrogate pairs. This class facilitates
- * the correct escaping of all Unicode characters.
- *
- * <p>
- * As there are important reasons, including potential security issues, to
- * handle Unicode correctly if you are considering implementing a new escaper
- * you should favor using UnicodeEscaper wherever possible.
- *
- * <p>
- * A {@code UnicodeEscaper} instance is required to be stateless, and safe when
- * used concurrently by multiple threads.
- *
- * <p>
- * Several popular escapers are defined as constants in the class
- * {@link CharEscapers}. To create your own escapers extend this class and
- * implement the {@link #escape(int)} method.
- *
- *
- */
-public abstract class UnicodeEscaper implements Escaper {
- /** The amount of padding (chars) to use when growing the escape buffer. */
- private static final int DEST_PAD = 32;
-
- /**
- * Returns the escaped form of the given Unicode code point, or {@code null}
- * if this code point does not need to be escaped. When called as part of an
- * escaping operation, the given code point is guaranteed to be in the range
- * {@code 0 <= cp <= Character#MAX_CODE_POINT}.
- *
- * <p>
- * If an empty array is returned, this effectively strips the input
- * character from the resulting text.
- *
- * <p>
- * If the character does not need to be escaped, this method should return
- * {@code null}, rather than an array containing the character
- * representation of the code point. This enables the escaping algorithm to
- * perform more efficiently.
- *
- * <p>
- * If the implementation of this method cannot correctly handle a particular
- * code point then it should either throw an appropriate runtime exception
- * or return a suitable replacement character. It must never silently
- * discard invalid input as this may constitute a security risk.
- *
- * @param cp
- * the Unicode code point to escape if necessary
- * @return the replacement characters, or {@code null} if no escaping was
- * needed
- */
- protected abstract char[] escape(int cp);
-
- /**
- * Scans a sub-sequence of characters from a given {@link CharSequence},
- * returning the index of the next character that requires escaping.
- *
- * <p>
- * <b>Note:</b> When implementing an escaper, it is a good idea to override
- * this method for efficiency. The base class implementation determines
- * successive Unicode code points and invokes {@link #escape(int)} for each
- * of them. If the semantics of your escaper are such that code points in
- * the supplementary range are either all escaped or all unescaped, this
- * method can be implemented more efficiently using
- * {@link CharSequence#charAt(int)}.
- *
- * <p>
- * Note however that if your escaper does not escape characters in the
- * supplementary range, you should either continue to validate the
- * correctness of any surrogate characters encountered or provide a clear
- * warning to users that your escaper does not validate its input.
- *
- * <p>
- * See {@link PercentEscaper} for an example.
- *
- * @param csq
- * a sequence of characters
- * @param start
- * the index of the first character to be scanned
- * @param end
- * the index immediately after the last character to be scanned
- * @throws IllegalArgumentException
- * if the scanned sub-sequence of {@code csq} contains invalid
- * surrogate pairs
- */
- protected int nextEscapeIndex(CharSequence csq, int start, int end) {
- int index = start;
- while (index < end) {
- int cp = codePointAt(csq, index, end);
- if (cp < 0 || escape(cp) != null) {
- break;
- }
- index += Character.isSupplementaryCodePoint(cp) ? 2 : 1;
- }
- return index;
- }
-
- /**
- * Returns the escaped form of a given literal string.
- *
- * <p>
- * If you are escaping input in arbitrary successive chunks, then it is not
- * generally safe to use this method. If an input string ends with an
- * unmatched high surrogate character, then this method will throw
- * {@link IllegalArgumentException}. You should either ensure your input is
- * valid <a href="http://en.wikipedia.org/wiki/UTF-16">UTF-16</a> before
- * calling this method or use an escaped {@link Appendable} (as returned by
- * {@link #escape(Appendable)}) which can cope with arbitrarily split input.
- *
- * <p>
- * <b>Note:</b> When implementing an escaper it is a good idea to override
- * this method for efficiency by inlining the implementation of
- * {@link #nextEscapeIndex(CharSequence, int, int)} directly. Doing this for
- * {@link PercentEscaper} more than doubled the performance for unescaped
- * strings (as measured by {@link CharEscapersBenchmark}).
- *
- * @param string
- * the literal string to be escaped
- * @return the escaped form of {@code string}
- * @throws NullPointerException
- * if {@code string} is null
- * @throws IllegalArgumentException
- * if invalid surrogate characters are encountered
- */
- public String escape(String string) {
- int end = string.length();
- int index = nextEscapeIndex(string, 0, end);
- return index == end ? string : escapeSlow(string, index);
- }
-
- /**
- * Returns the escaped form of a given literal string, starting at the given
- * index. This method is called by the {@link #escape(String)} method when
- * it discovers that escaping is required. It is protected to allow
- * subclasses to override the fastpath escaping function to inline their
- * escaping test. See {@link CharEscaperBuilder} for an example usage.
- *
- * <p>
- * This method is not reentrant and may only be invoked by the top level
- * {@link #escape(String)} method.
- *
- * @param s
- * the literal string to be escaped
- * @param index
- * the index to start escaping from
- * @return the escaped form of {@code string}
- * @throws NullPointerException
- * if {@code string} is null
- * @throws IllegalArgumentException
- * if invalid surrogate characters are encountered
- */
- protected final String escapeSlow(String s, int index) {
- int end = s.length();
-
- // Get a destination buffer and setup some loop variables.
- char[] dest = DEST_TL.get();
- int destIndex = 0;
- int unescapedChunkStart = 0;
-
- while (index < end) {
- int cp = codePointAt(s, index, end);
- if (cp < 0) {
- throw new IllegalArgumentException("Trailing high surrogate at end of input");
- }
- char[] escaped = escape(cp);
- if (escaped != null) {
- int charsSkipped = index - unescapedChunkStart;
-
- // This is the size needed to add the replacement, not the full
- // size needed by the string. We only regrow when we absolutely
- // must.
- int sizeNeeded = destIndex + charsSkipped + escaped.length;
- if (dest.length < sizeNeeded) {
- int destLength = sizeNeeded + (end - index) + DEST_PAD;
- dest = growBuffer(dest, destIndex, destLength);
- }
- // If we have skipped any characters, we need to copy them now.
- if (charsSkipped > 0) {
- s.getChars(unescapedChunkStart, index, dest, destIndex);
- destIndex += charsSkipped;
- }
- if (escaped.length > 0) {
- System.arraycopy(escaped, 0, dest, destIndex, escaped.length);
- destIndex += escaped.length;
- }
- }
- unescapedChunkStart = index + (Character.isSupplementaryCodePoint(cp) ? 2 : 1);
- index = nextEscapeIndex(s, unescapedChunkStart, end);
- }
-
- // Process trailing unescaped characters - no need to account for
- // escaped
- // length or padding the allocation.
- int charsSkipped = end - unescapedChunkStart;
- if (charsSkipped > 0) {
- int endIndex = destIndex + charsSkipped;
- if (dest.length < endIndex) {
- dest = growBuffer(dest, destIndex, endIndex);
- }
- s.getChars(unescapedChunkStart, end, dest, destIndex);
- destIndex = endIndex;
- }
- return new String(dest, 0, destIndex);
- }
-
- /**
- * Returns an {@code Appendable} instance which automatically escapes all
- * text appended to it before passing the resulting text to an underlying
- * {@code Appendable}.
- *
- * <p>
- * Unlike {@link #escape(String)} it is permitted to append arbitrarily
- * split input to this Appendable, including input that is split over a
- * surrogate pair. In this case the pending high surrogate character will
- * not be processed until the corresponding low surrogate is appended. This
- * means that a trailing high surrogate character at the end of the input
- * cannot be detected and will be silently ignored. This is unavoidable
- * since the Appendable interface has no {@code close()} method, and it is
- * impossible to determine when the last characters have been appended.
- *
- * <p>
- * The methods of the returned object will propagate any exceptions thrown
- * by the underlying {@code Appendable}.
- *
- * <p>
- * For well formed <a href="http://en.wikipedia.org/wiki/UTF-16">UTF-16</a>
- * the escaping behavior is identical to that of {@link #escape(String)} and
- * the following code is equivalent to (but much slower than)
- * {@code escaper.escape(string)}:
- *
- * <pre>
- * {
- * @code
- * StringBuilder sb = new StringBuilder();
- * escaper.escape(sb).append(string);
- * return sb.toString();
- * }
- * </pre>
- *
- * @param out
- * the underlying {@code Appendable} to append escaped output to
- * @return an {@code Appendable} which passes text to {@code out} after
- * escaping it
- * @throws NullPointerException
- * if {@code out} is null
- * @throws IllegalArgumentException
- * if invalid surrogate characters are encountered
- *
- */
- public Appendable escape(final Appendable out) {
- assert out != null;
-
- return new Appendable() {
- int pendingHighSurrogate = -1;
- char[] decodedChars = new char[2];
-
- public Appendable append(CharSequence csq) throws IOException {
- return append(csq, 0, csq.length());
- }
-
- public Appendable append(CharSequence csq, int start, int end) throws IOException {
- int index = start;
- if (index < end) {
- // This is a little subtle: index must never reference the
- // middle of a
- // surrogate pair but unescapedChunkStart can. The first
- // time we enter
- // the loop below it is possible that index !=
- // unescapedChunkStart.
- int unescapedChunkStart = index;
- if (pendingHighSurrogate != -1) {
- // Our last append operation ended halfway through a
- // surrogate pair
- // so we have to do some extra work first.
- char c = csq.charAt(index++);
- if (!Character.isLowSurrogate(c)) {
- throw new IllegalArgumentException(
- "Expected low surrogate character but got " + c);
- }
- char[] escaped = escape(Character.toCodePoint((char) pendingHighSurrogate,
- c));
- if (escaped != null) {
- // Emit the escaped character and adjust
- // unescapedChunkStart to
- // skip the low surrogate we have consumed.
- outputChars(escaped, escaped.length);
- unescapedChunkStart += 1;
- } else {
- // Emit pending high surrogate (unescaped) but do
- // not modify
- // unescapedChunkStart as we must still emit the low
- // surrogate.
- out.append((char) pendingHighSurrogate);
- }
- pendingHighSurrogate = -1;
- }
- while (true) {
- // Find and append the next subsequence of unescaped
- // characters.
- index = nextEscapeIndex(csq, index, end);
- if (index > unescapedChunkStart) {
- out.append(csq, unescapedChunkStart, index);
- }
- if (index == end) {
- break;
- }
- // If we are not finished, calculate the next code
- // point.
- int cp = codePointAt(csq, index, end);
- if (cp < 0) {
- // Our sequence ended half way through a surrogate
- // pair so just
- // record the state and exit.
- pendingHighSurrogate = -cp;
- break;
- }
- // Escape the code point and output the characters.
- char[] escaped = escape(cp);
- if (escaped != null) {
- outputChars(escaped, escaped.length);
- } else {
- // This shouldn't really happen if nextEscapeIndex
- // is correct but
- // we should cope with false positives.
- int len = Character.toChars(cp, decodedChars, 0);
- outputChars(decodedChars, len);
- }
- // Update our index past the escaped character and
- // continue.
- index += (Character.isSupplementaryCodePoint(cp) ? 2 : 1);
- unescapedChunkStart = index;
- }
- }
- return this;
- }
-
- public Appendable append(char c) throws IOException {
- if (pendingHighSurrogate != -1) {
- // Our last append operation ended halfway through a
- // surrogate pair
- // so we have to do some extra work first.
- if (!Character.isLowSurrogate(c)) {
- throw new IllegalArgumentException(
- "Expected low surrogate character but got '" + c + "' with value "
- + (int) c);
- }
- char[] escaped = escape(Character.toCodePoint((char) pendingHighSurrogate, c));
- if (escaped != null) {
- outputChars(escaped, escaped.length);
- } else {
- out.append((char) pendingHighSurrogate);
- out.append(c);
- }
- pendingHighSurrogate = -1;
- } else if (Character.isHighSurrogate(c)) {
- // This is the start of a (split) surrogate pair.
- pendingHighSurrogate = c;
- } else {
- if (Character.isLowSurrogate(c)) {
- throw new IllegalArgumentException("Unexpected low surrogate character '"
- + c + "' with value " + (int) c);
- }
- // This is a normal (non surrogate) char.
- char[] escaped = escape(c);
- if (escaped != null) {
- outputChars(escaped, escaped.length);
- } else {
- out.append(c);
- }
- }
- return this;
- }
-
- private void outputChars(char[] chars, int len) throws IOException {
- for (int n = 0; n < len; n++) {
- out.append(chars[n]);
- }
- }
- };
- }
-
- /**
- * Returns the Unicode code point of the character at the given index.
- *
- * <p>
- * Unlike {@link Character#codePointAt(CharSequence, int)} or
- * {@link String#codePointAt(int)} this method will never fail silently when
- * encountering an invalid surrogate pair.
- *
- * <p>
- * The behaviour of this method is as follows:
- * <ol>
- * <li>If {@code index >= end}, {@link IndexOutOfBoundsException} is thrown.
- * <li><b>If the character at the specified index is not a surrogate, it is
- * returned.</b>
- * <li>If the first character was a high surrogate value, then an attempt is
- * made to read the next character.
- * <ol>
- * <li><b>If the end of the sequence was reached, the negated value of the
- * trailing high surrogate is returned.</b>
- * <li><b>If the next character was a valid low surrogate, the code point
- * value of the high/low surrogate pair is returned.</b>
- * <li>If the next character was not a low surrogate value, then
- * {@link IllegalArgumentException} is thrown.
- * </ol>
- * <li>If the first character was a low surrogate value,
- * {@link IllegalArgumentException} is thrown.
- * </ol>
- *
- * @param seq
- * the sequence of characters from which to decode the code point
- * @param index
- * the index of the first character to decode
- * @param end
- * the index beyond the last valid character to decode
- * @return the Unicode code point for the given index or the negated value
- * of the trailing high surrogate character at the end of the
- * sequence
- */
- protected static final int codePointAt(CharSequence seq, int index, int end) {
- if (index < end) {
- char c1 = seq.charAt(index++);
- if (c1 < Character.MIN_HIGH_SURROGATE || c1 > Character.MAX_LOW_SURROGATE) {
- // Fast path (first test is probably all we need to do)
- return c1;
- } else if (c1 <= Character.MAX_HIGH_SURROGATE) {
- // If the high surrogate was the last character, return its
- // inverse
- if (index == end) {
- return -c1;
- }
- // Otherwise look for the low surrogate following it
- char c2 = seq.charAt(index);
- if (Character.isLowSurrogate(c2)) {
- return Character.toCodePoint(c1, c2);
- }
- throw new IllegalArgumentException("Expected low surrogate but got char '" + c2
- + "' with value " + (int) c2 + " at index " + index);
- } else {
- throw new IllegalArgumentException("Unexpected low surrogate character '" + c1
- + "' with value " + (int) c1 + " at index " + (index - 1));
- }
- }
- throw new IndexOutOfBoundsException("Index exceeds specified range");
- }
-
- /**
- * Helper method to grow the character buffer as needed, this only happens
- * once in a while so it's ok if it's in a method call. If the index passed
- * in is 0 then no copying will be done.
- */
- private static final char[] growBuffer(char[] dest, int index, int size) {
- char[] copy = new char[size];
- if (index > 0) {
- System.arraycopy(dest, 0, copy, 0, index);
- }
- return copy;
- }
-
- /**
- * A thread-local destination buffer to keep us from creating new buffers.
- * The starting size is 1024 characters. If we grow past this we don't put
- * it back in the threadlocal, we just keep going and grow as needed.
- */
- private static final ThreadLocal<char[]> DEST_TL = new ThreadLocal<char[]>() {
- @Override
- protected char[] initialValue() {
- return new char[1024];
- }
- };
-}
diff --git a/src/main/java/org/yaml/snakeyaml/util/UriEncoder.java b/src/main/java/org/yaml/snakeyaml/util/UriEncoder.java
index 4cc18b4..b6a1992 100644
--- a/src/main/java/org/yaml/snakeyaml/util/UriEncoder.java
+++ b/src/main/java/org/yaml/snakeyaml/util/UriEncoder.java
@@ -23,27 +23,46 @@ import java.nio.charset.CharacterCodingException;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.nio.charset.CodingErrorAction;
-
+import java.util.BitSet;
+
+import org.apache.commons.codec.net.URLCodec;
import org.yaml.snakeyaml.error.YAMLException;
-import org.yaml.snakeyaml.external.com.google.gdata.util.common.base.Escaper;
-import org.yaml.snakeyaml.external.com.google.gdata.util.common.base.PercentEscaper;
public abstract class UriEncoder {
private static final CharsetDecoder UTF8Decoder = Charset.forName("UTF-8").newDecoder()
.onMalformedInput(CodingErrorAction.REPORT);
- // Include the [] chars to the SAFEPATHCHARS_URLENCODER to avoid
- // its escape as required by spec. See
- // http://yaml.org/spec/1.1/#escaping%20in%20URI/
- private static final String SAFE_CHARS = PercentEscaper.SAFEPATHCHARS_URLENCODER + "[]/";
- private static final Escaper escaper = new PercentEscaper(SAFE_CHARS, false);
+ // default safe characters which can appear within URI and shouldn't be escaped
+ private static final BitSet allowedCharacters = new BitSet(256);
+
+ static {
+ for (int i = 'a'; i <= 'z'; i++) {
+ allowedCharacters.set(i);
+ }
+ for (int i = 'A'; i <= 'Z'; i++) {
+ allowedCharacters.set(i);
+ }
+ for (int i = '0'; i <= '9'; i++) {
+ allowedCharacters.set(i);
+ }
+ // http://yaml.org/spec/1.1/#escaping%20in%20URI/
+ for (char c : "-_.!~*'()@:$&,;=/[]".toCharArray()) {
+ allowedCharacters.set(c);
+ }
+ }
/**
* Escape special characters with '%'
* @param uri URI to be escaped
* @return encoded URI
*/
public static String encode(String uri) {
- return escaper.escape(uri);
+ try {
+ byte[] rawdata = URLCodec.encodeUrl(allowedCharacters,
+ uri.getBytes("UTF-8"));
+ return new String(rawdata, 0, rawdata.length, "US-ASCII");
+ } catch (UnsupportedEncodingException e) {
+ throw new YAMLException(e);
+ }
}
/**
--
2.20.1