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URLParser.cpp
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URLParser.cpp
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/*
* Copyright (C) 2016-2020 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include <wtf/URLParser.h>
#include <array>
#include <functional>
#include <mutex>
#include <wtf/text/CodePointIterator.h>
namespace WTF {
#define URL_PARSER_DEBUGGING 0
#if URL_PARSER_DEBUGGING
#define URL_PARSER_LOG(...) WTFLogAlways(__VA_ARGS__)
#else
#define URL_PARSER_LOG(...)
#endif
ALWAYS_INLINE static void appendCodePoint(Vector<UChar>& destination, UChar32 codePoint)
{
if (U_IS_BMP(codePoint)) {
destination.append(static_cast<UChar>(codePoint));
return;
}
destination.reserveCapacity(destination.size() + 2);
destination.uncheckedAppend(U16_LEAD(codePoint));
destination.uncheckedAppend(U16_TRAIL(codePoint));
}
enum URLCharacterClass {
UserInfo = 0x1,
Default = 0x2,
ForbiddenHost = 0x4,
QueryPercent = 0x8,
SlashQuestionOrHash = 0x10,
ValidScheme = 0x20,
};
static const uint8_t characterClassTable[256] = {
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x0
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x2
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x3
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x4
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x5
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x6
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x7
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x8
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x9
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xA
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xB
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xC
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xD
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xE
UserInfo | Default | QueryPercent | ForbiddenHost, // 0xF
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x10
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x11
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x12
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x13
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x14
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x15
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x16
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x17
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x18
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x19
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1A
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1B
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1C
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1D
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1E
UserInfo | Default | QueryPercent | ForbiddenHost, // 0x1F
UserInfo | Default | QueryPercent | ForbiddenHost, // ' '
0, // '!'
UserInfo | Default | QueryPercent, // '"'
UserInfo | Default | QueryPercent | SlashQuestionOrHash | ForbiddenHost, // '#'
0, // '$'
ForbiddenHost, // '%'
0, // '&'
0, // '\''
0, // '('
0, // ')'
0, // '*'
ValidScheme, // '+'
0, // ','
ValidScheme, // '-'
ValidScheme, // '.'
UserInfo | SlashQuestionOrHash | ForbiddenHost, // '/'
ValidScheme, // '0'
ValidScheme, // '1'
ValidScheme, // '2'
ValidScheme, // '3'
ValidScheme, // '4'
ValidScheme, // '5'
ValidScheme, // '6'
ValidScheme, // '7'
ValidScheme, // '8'
ValidScheme, // '9'
UserInfo | ForbiddenHost, // ':'
UserInfo, // ';'
UserInfo | Default | QueryPercent | ForbiddenHost, // '<'
UserInfo, // '='
UserInfo | Default | QueryPercent | ForbiddenHost, // '>'
UserInfo | Default | SlashQuestionOrHash | ForbiddenHost, // '?'
UserInfo | ForbiddenHost, // '@'
ValidScheme, // 'A'
ValidScheme, // 'B'
ValidScheme, // 'C'
ValidScheme, // 'D'
ValidScheme, // 'E'
ValidScheme, // 'F'
ValidScheme, // 'G'
ValidScheme, // 'H'
ValidScheme, // 'I'
ValidScheme, // 'J'
ValidScheme, // 'K'
ValidScheme, // 'L'
ValidScheme, // 'M'
ValidScheme, // 'N'
ValidScheme, // 'O'
ValidScheme, // 'P'
ValidScheme, // 'Q'
ValidScheme, // 'R'
ValidScheme, // 'S'
ValidScheme, // 'T'
ValidScheme, // 'U'
ValidScheme, // 'V'
ValidScheme, // 'W'
ValidScheme, // 'X'
ValidScheme, // 'Y'
ValidScheme, // 'Z'
UserInfo | ForbiddenHost, // '['
UserInfo | SlashQuestionOrHash | ForbiddenHost, // '\\'
UserInfo | ForbiddenHost, // ']'
UserInfo | ForbiddenHost, // '^'
0, // '_'
UserInfo | Default, // '`'
ValidScheme, // 'a'
ValidScheme, // 'b'
ValidScheme, // 'c'
ValidScheme, // 'd'
ValidScheme, // 'e'
ValidScheme, // 'f'
ValidScheme, // 'g'
ValidScheme, // 'h'
ValidScheme, // 'i'
ValidScheme, // 'j'
ValidScheme, // 'k'
ValidScheme, // 'l'
ValidScheme, // 'm'
ValidScheme, // 'n'
ValidScheme, // 'o'
ValidScheme, // 'p'
ValidScheme, // 'q'
ValidScheme, // 'r'
ValidScheme, // 's'
ValidScheme, // 't'
ValidScheme, // 'u'
ValidScheme, // 'v'
ValidScheme, // 'w'
ValidScheme, // 'x'
ValidScheme, // 'y'
ValidScheme, // 'z'
UserInfo | Default, // '{'
UserInfo | ForbiddenHost, // '|'
UserInfo | Default, // '}'
0, // '~'
QueryPercent | ForbiddenHost, // 0x7F
QueryPercent, // 0x80
QueryPercent, // 0x81
QueryPercent, // 0x82
QueryPercent, // 0x83
QueryPercent, // 0x84
QueryPercent, // 0x85
QueryPercent, // 0x86
QueryPercent, // 0x87
QueryPercent, // 0x88
QueryPercent, // 0x89
QueryPercent, // 0x8A
QueryPercent, // 0x8B
QueryPercent, // 0x8C
QueryPercent, // 0x8D
QueryPercent, // 0x8E
QueryPercent, // 0x8F
QueryPercent, // 0x90
QueryPercent, // 0x91
QueryPercent, // 0x92
QueryPercent, // 0x93
QueryPercent, // 0x94
QueryPercent, // 0x95
QueryPercent, // 0x96
QueryPercent, // 0x97
QueryPercent, // 0x98
QueryPercent, // 0x99
QueryPercent, // 0x9A
QueryPercent, // 0x9B
QueryPercent, // 0x9C
QueryPercent, // 0x9D
QueryPercent, // 0x9E
QueryPercent, // 0x9F
QueryPercent, // 0xA0
QueryPercent, // 0xA1
QueryPercent, // 0xA2
QueryPercent, // 0xA3
QueryPercent, // 0xA4
QueryPercent, // 0xA5
QueryPercent, // 0xA6
QueryPercent, // 0xA7
QueryPercent, // 0xA8
QueryPercent, // 0xA9
QueryPercent, // 0xAA
QueryPercent, // 0xAB
QueryPercent, // 0xAC
QueryPercent, // 0xAD
QueryPercent, // 0xAE
QueryPercent, // 0xAF
QueryPercent, // 0xB0
QueryPercent, // 0xB1
QueryPercent, // 0xB2
QueryPercent, // 0xB3
QueryPercent, // 0xB4
QueryPercent, // 0xB5
QueryPercent, // 0xB6
QueryPercent, // 0xB7
QueryPercent, // 0xB8
QueryPercent, // 0xB9
QueryPercent, // 0xBA
QueryPercent, // 0xBB
QueryPercent, // 0xBC
QueryPercent, // 0xBD
QueryPercent, // 0xBE
QueryPercent, // 0xBF
QueryPercent, // 0xC0
QueryPercent, // 0xC1
QueryPercent, // 0xC2
QueryPercent, // 0xC3
QueryPercent, // 0xC4
QueryPercent, // 0xC5
QueryPercent, // 0xC6
QueryPercent, // 0xC7
QueryPercent, // 0xC8
QueryPercent, // 0xC9
QueryPercent, // 0xCA
QueryPercent, // 0xCB
QueryPercent, // 0xCC
QueryPercent, // 0xCD
QueryPercent, // 0xCE
QueryPercent, // 0xCF
QueryPercent, // 0xD0
QueryPercent, // 0xD1
QueryPercent, // 0xD2
QueryPercent, // 0xD3
QueryPercent, // 0xD4
QueryPercent, // 0xD5
QueryPercent, // 0xD6
QueryPercent, // 0xD7
QueryPercent, // 0xD8
QueryPercent, // 0xD9
QueryPercent, // 0xDA
QueryPercent, // 0xDB
QueryPercent, // 0xDC
QueryPercent, // 0xDD
QueryPercent, // 0xDE
QueryPercent, // 0xDF
QueryPercent, // 0xE0
QueryPercent, // 0xE1
QueryPercent, // 0xE2
QueryPercent, // 0xE3
QueryPercent, // 0xE4
QueryPercent, // 0xE5
QueryPercent, // 0xE6
QueryPercent, // 0xE7
QueryPercent, // 0xE8
QueryPercent, // 0xE9
QueryPercent, // 0xEA
QueryPercent, // 0xEB
QueryPercent, // 0xEC
QueryPercent, // 0xED
QueryPercent, // 0xEE
QueryPercent, // 0xEF
QueryPercent, // 0xF0
QueryPercent, // 0xF1
QueryPercent, // 0xF2
QueryPercent, // 0xF3
QueryPercent, // 0xF4
QueryPercent, // 0xF5
QueryPercent, // 0xF6
QueryPercent, // 0xF7
QueryPercent, // 0xF8
QueryPercent, // 0xF9
QueryPercent, // 0xFA
QueryPercent, // 0xFB
QueryPercent, // 0xFC
QueryPercent, // 0xFD
QueryPercent, // 0xFE
QueryPercent, // 0xFF
};
template<typename CharacterType> ALWAYS_INLINE static bool isC0Control(CharacterType character) { return character <= 0x1F; }
template<typename CharacterType> ALWAYS_INLINE static bool isC0ControlOrSpace(CharacterType character) { return character <= 0x20; }
template<typename CharacterType> ALWAYS_INLINE static bool isTabOrNewline(CharacterType character) { return character <= 0xD && character >= 0x9 && character != 0xB && character != 0xC; }
template<typename CharacterType> ALWAYS_INLINE static bool isInSimpleEncodeSet(CharacterType character) { return character > 0x7E || isC0Control(character); }
template<typename CharacterType> ALWAYS_INLINE static bool isInFragmentEncodeSet(CharacterType character) { return character > 0x7E || character == '`' || ((characterClassTable[character] & QueryPercent) && character != '#'); }
template<typename CharacterType> ALWAYS_INLINE static bool isInDefaultEncodeSet(CharacterType character) { return character > 0x7E || characterClassTable[character] & Default; }
template<typename CharacterType> ALWAYS_INLINE static bool isInUserInfoEncodeSet(CharacterType character) { return character > 0x7E || characterClassTable[character] & UserInfo; }
template<typename CharacterType> ALWAYS_INLINE static bool isPercentOrNonASCII(CharacterType character) { return !isASCII(character) || character == '%'; }
template<typename CharacterType> ALWAYS_INLINE static bool isSlashQuestionOrHash(CharacterType character) { return character <= '\\' && characterClassTable[character] & SlashQuestionOrHash; }
template<typename CharacterType> ALWAYS_INLINE static bool isValidSchemeCharacter(CharacterType character) { return character <= 'z' && characterClassTable[character] & ValidScheme; }
template<typename CharacterType> ALWAYS_INLINE static bool isForbiddenHostCodePoint(CharacterType character) { return character <= 0x7F && characterClassTable[character] & ForbiddenHost; }
ALWAYS_INLINE static bool shouldPercentEncodeQueryByte(uint8_t byte, const bool& urlIsSpecial)
{
if (characterClassTable[byte] & QueryPercent)
return true;
if (byte == '\'' && urlIsSpecial)
return true;
return false;
}
bool URLParser::isInUserInfoEncodeSet(UChar c)
{
return WTF::isInUserInfoEncodeSet(c);
}
template<typename CharacterType, URLParser::ReportSyntaxViolation reportSyntaxViolation>
ALWAYS_INLINE void URLParser::advance(CodePointIterator<CharacterType>& iterator, const CodePointIterator<CharacterType>& iteratorForSyntaxViolationPosition)
{
++iterator;
while (UNLIKELY(!iterator.atEnd() && isTabOrNewline(*iterator))) {
if (reportSyntaxViolation == ReportSyntaxViolation::Yes)
syntaxViolation(iteratorForSyntaxViolationPosition);
++iterator;
}
}
template<typename CharacterType>
bool URLParser::takesTwoAdvancesUntilEnd(CodePointIterator<CharacterType> iterator)
{
if (iterator.atEnd())
return false;
advance<CharacterType, ReportSyntaxViolation::No>(iterator);
if (iterator.atEnd())
return false;
advance<CharacterType, ReportSyntaxViolation::No>(iterator);
return iterator.atEnd();
}
template<typename CharacterType>
ALWAYS_INLINE bool URLParser::isWindowsDriveLetter(CodePointIterator<CharacterType> iterator)
{
// https://url.spec.whatwg.org/#start-with-a-windows-drive-letter
if (iterator.atEnd() || !isASCIIAlpha(*iterator))
return false;
advance<CharacterType, ReportSyntaxViolation::No>(iterator);
if (iterator.atEnd())
return false;
if (*iterator != ':' && *iterator != '|')
return false;
advance<CharacterType, ReportSyntaxViolation::No>(iterator);
return iterator.atEnd() || *iterator == '/' || *iterator == '\\' || *iterator == '?' || *iterator == '#';
}
ALWAYS_INLINE void URLParser::appendToASCIIBuffer(UChar32 codePoint)
{
ASSERT(isASCII(codePoint));
if (UNLIKELY(m_didSeeSyntaxViolation))
m_asciiBuffer.append(codePoint);
}
ALWAYS_INLINE void URLParser::appendToASCIIBuffer(const char* characters, size_t length)
{
if (UNLIKELY(m_didSeeSyntaxViolation))
m_asciiBuffer.append(characters, length);
}
template<typename CharacterType>
void URLParser::appendWindowsDriveLetter(CodePointIterator<CharacterType>& iterator)
{
auto lengthWithOnlyOneSlashInPath = m_url.m_hostEnd + m_url.m_portLength + 1;
if (m_url.m_pathAfterLastSlash > lengthWithOnlyOneSlashInPath) {
syntaxViolation(iterator);
m_url.m_pathAfterLastSlash = lengthWithOnlyOneSlashInPath;
m_asciiBuffer.resize(lengthWithOnlyOneSlashInPath);
}
ASSERT(isWindowsDriveLetter(iterator));
appendToASCIIBuffer(*iterator);
advance(iterator);
ASSERT(!iterator.atEnd());
ASSERT(*iterator == ':' || *iterator == '|');
if (*iterator == '|')
syntaxViolation(iterator);
appendToASCIIBuffer(':');
advance(iterator);
}
bool URLParser::copyBaseWindowsDriveLetter(const URL& base)
{
if (base.protocolIs("file")) {
RELEASE_ASSERT(base.m_hostEnd + base.m_portLength < base.m_string.length());
if (base.m_string.is8Bit()) {
const LChar* begin = base.m_string.characters8();
CodePointIterator<LChar> c(begin + base.m_hostEnd + base.m_portLength + 1, begin + base.m_string.length());
if (isWindowsDriveLetter(c)) {
appendWindowsDriveLetter(c);
return true;
}
} else {
const UChar* begin = base.m_string.characters16();
CodePointIterator<UChar> c(begin + base.m_hostEnd + base.m_portLength + 1, begin + base.m_string.length());
if (isWindowsDriveLetter(c)) {
appendWindowsDriveLetter(c);
return true;
}
}
}
return false;
}
template<typename CharacterType>
bool URLParser::shouldCopyFileURL(CodePointIterator<CharacterType> iterator)
{
if (!isWindowsDriveLetter(iterator))
return true;
if (iterator.atEnd())
return false;
advance(iterator);
if (iterator.atEnd())
return true;
advance(iterator);
if (iterator.atEnd())
return true;
return !isSlashQuestionOrHash(*iterator);
}
static void percentEncodeByte(uint8_t byte, Vector<LChar>& buffer)
{
buffer.append('%');
buffer.append(upperNibbleToASCIIHexDigit(byte));
buffer.append(lowerNibbleToASCIIHexDigit(byte));
}
void URLParser::percentEncodeByte(uint8_t byte)
{
ASSERT(m_didSeeSyntaxViolation);
appendToASCIIBuffer('%');
appendToASCIIBuffer(upperNibbleToASCIIHexDigit(byte));
appendToASCIIBuffer(lowerNibbleToASCIIHexDigit(byte));
}
const char replacementCharacterUTF8PercentEncoded[10] = "%EF%BF%BD";
const size_t replacementCharacterUTF8PercentEncodedLength = sizeof(replacementCharacterUTF8PercentEncoded) - 1;
template<bool(*isInCodeSet)(UChar32), typename CharacterType>
ALWAYS_INLINE void URLParser::utf8PercentEncode(const CodePointIterator<CharacterType>& iterator)
{
ASSERT(!iterator.atEnd());
UChar32 codePoint = *iterator;
if (LIKELY(isASCII(codePoint))) {
if (UNLIKELY(isInCodeSet(codePoint))) {
syntaxViolation(iterator);
percentEncodeByte(codePoint);
} else
appendToASCIIBuffer(codePoint);
return;
}
ASSERT_WITH_MESSAGE(isInCodeSet(codePoint), "isInCodeSet should always return true for non-ASCII characters");
syntaxViolation(iterator);
uint8_t buffer[U8_MAX_LENGTH];
int32_t offset = 0;
UBool isError = false;
U8_APPEND(buffer, offset, U8_MAX_LENGTH, codePoint, isError);
if (isError) {
appendToASCIIBuffer(replacementCharacterUTF8PercentEncoded, replacementCharacterUTF8PercentEncodedLength);
return;
}
for (int32_t i = 0; i < offset; ++i)
percentEncodeByte(buffer[i]);
}
template<typename CharacterType>
ALWAYS_INLINE void URLParser::utf8QueryEncode(const CodePointIterator<CharacterType>& iterator)
{
ASSERT(!iterator.atEnd());
UChar32 codePoint = *iterator;
if (LIKELY(isASCII(codePoint))) {
if (UNLIKELY(shouldPercentEncodeQueryByte(codePoint, m_urlIsSpecial))) {
syntaxViolation(iterator);
percentEncodeByte(codePoint);
} else
appendToASCIIBuffer(codePoint);
return;
}
syntaxViolation(iterator);
uint8_t buffer[U8_MAX_LENGTH];
int32_t offset = 0;
UBool isError = false;
U8_APPEND(buffer, offset, U8_MAX_LENGTH, codePoint, isError);
if (isError) {
appendToASCIIBuffer(replacementCharacterUTF8PercentEncoded, replacementCharacterUTF8PercentEncodedLength);
return;
}
for (int32_t i = 0; i < offset; ++i) {
auto byte = buffer[i];
if (shouldPercentEncodeQueryByte(byte, m_urlIsSpecial))
percentEncodeByte(byte);
else
appendToASCIIBuffer(byte);
}
}
template<typename CharacterType>
void URLParser::encodeNonUTF8Query(const Vector<UChar>& source, const URLTextEncoding& encoding, CodePointIterator<CharacterType> iterator)
{
auto encoded = encoding.encodeForURLParsing(StringView(source.data(), source.size()));
auto* data = encoded.data();
size_t length = encoded.size();
if (!length == !iterator.atEnd()) {
syntaxViolation(iterator);
return;
}
size_t i = 0;
for (; i < length; ++i) {
ASSERT(!iterator.atEnd());
uint8_t byte = data[i];
if (UNLIKELY(byte != *iterator)) {
syntaxViolation(iterator);
break;
}
if (UNLIKELY(shouldPercentEncodeQueryByte(byte, m_urlIsSpecial))) {
syntaxViolation(iterator);
break;
}
appendToASCIIBuffer(byte);
++iterator;
}
while (!iterator.atEnd() && isTabOrNewline(*iterator))
++iterator;
ASSERT((i == length) == iterator.atEnd());
for (; i < length; ++i) {
ASSERT(m_didSeeSyntaxViolation);
uint8_t byte = data[i];
if (shouldPercentEncodeQueryByte(byte, m_urlIsSpecial))
percentEncodeByte(byte);
else
appendToASCIIBuffer(byte);
}
}
std::optional<uint16_t> URLParser::defaultPortForProtocol(StringView scheme)
{
static constexpr uint16_t ftpPort = 21;
static constexpr uint16_t httpPort = 80;
static constexpr uint16_t httpsPort = 443;
static constexpr uint16_t wsPort = 80;
static constexpr uint16_t wssPort = 443;
auto length = scheme.length();
if (!length)
return std::nullopt;
switch (scheme[0]) {
case 'w':
switch (length) {
case 2:
if (scheme[1] == 's')
return wsPort;
return std::nullopt;
case 3:
if (scheme[1] == 's'
&& scheme[2] == 's')
return wssPort;
return std::nullopt;
default:
return false;
}
case 'h':
switch (length) {
case 4:
if (scheme[1] == 't'
&& scheme[2] == 't'
&& scheme[3] == 'p')
return httpPort;
return std::nullopt;
case 5:
if (scheme[1] == 't'
&& scheme[2] == 't'
&& scheme[3] == 'p'
&& scheme[4] == 's')
return httpsPort;
return std::nullopt;
default:
return std::nullopt;
}
case 'f':
if (length == 3
&& scheme[1] == 't'
&& scheme[2] == 'p')
return ftpPort;
return std::nullopt;
default:
return std::nullopt;
}
}
enum class Scheme {
WS,
WSS,
File,
FTP,
HTTP,
HTTPS,
NonSpecial
};
ALWAYS_INLINE static Scheme scheme(StringView scheme)
{
auto length = scheme.length();
if (!length)
return Scheme::NonSpecial;
switch (scheme[0]) {
case 'f':
switch (length) {
case 3:
if (scheme[1] == 't'
&& scheme[2] == 'p')
return Scheme::FTP;
return Scheme::NonSpecial;
case 4:
if (scheme[1] == 'i'
&& scheme[2] == 'l'
&& scheme[3] == 'e')
return Scheme::File;
return Scheme::NonSpecial;
default:
return Scheme::NonSpecial;
}
case 'h':
switch (length) {
case 4:
if (scheme[1] == 't'
&& scheme[2] == 't'
&& scheme[3] == 'p')
return Scheme::HTTP;
return Scheme::NonSpecial;
case 5:
if (scheme[1] == 't'
&& scheme[2] == 't'
&& scheme[3] == 'p'
&& scheme[4] == 's')
return Scheme::HTTPS;
return Scheme::NonSpecial;
default:
return Scheme::NonSpecial;
}
case 'w':
switch (length) {
case 2:
if (scheme[1] == 's')
return Scheme::WS;
return Scheme::NonSpecial;
case 3:
if (scheme[1] == 's'
&& scheme[2] == 's')
return Scheme::WSS;
return Scheme::NonSpecial;
default:
return Scheme::NonSpecial;
}
default:
return Scheme::NonSpecial;
}
}
std::optional<String> URLParser::maybeCanonicalizeScheme(StringView scheme)
{
if (scheme.isEmpty())
return std::nullopt;
if (!isASCIIAlpha(scheme[0]))
return std::nullopt;
for (size_t i = 1; i < scheme.length(); ++i) {
if (isASCIIAlphanumeric(scheme[i]) || scheme[i] == '+' || scheme[i] == '-' || scheme[i] == '.')
continue;
return std::nullopt;
}
return scheme.convertToASCIILowercase();
}
bool URLParser::isSpecialScheme(StringView schemeArg)
{
return scheme(schemeArg) != Scheme::NonSpecial;
}
enum class URLParser::URLPart {
SchemeEnd,
UserStart,
UserEnd,
PasswordEnd,
HostEnd,
PortEnd,
PathAfterLastSlash,
PathEnd,
QueryEnd,
};
size_t URLParser::urlLengthUntilPart(const URL& url, URLPart part)
{
switch (part) {
case URLPart::QueryEnd:
return url.m_queryEnd;
case URLPart::PathEnd:
return url.m_pathEnd;
case URLPart::PathAfterLastSlash:
return url.m_pathAfterLastSlash;
case URLPart::PortEnd:
return url.m_hostEnd + url.m_portLength;
case URLPart::HostEnd:
return url.m_hostEnd;
case URLPart::PasswordEnd:
return url.m_passwordEnd;
case URLPart::UserEnd:
return url.m_userEnd;
case URLPart::UserStart:
return url.m_userStart;
case URLPart::SchemeEnd:
return url.m_schemeEnd;
}
ASSERT_NOT_REACHED();
return 0;
}
void URLParser::copyASCIIStringUntil(const String& string, size_t length)
{
RELEASE_ASSERT(length <= string.length());
if (string.isNull())
return;
ASSERT(m_asciiBuffer.isEmpty());
if (string.is8Bit())
appendToASCIIBuffer(string.characters8(), length);
else {
const UChar* characters = string.characters16();
for (size_t i = 0; i < length; ++i) {
UChar c = characters[i];
ASSERT_WITH_SECURITY_IMPLICATION(isASCII(c));
appendToASCIIBuffer(c);
}
}
}
template<typename CharacterType>
void URLParser::copyURLPartsUntil(const URL& base, URLPart part, const CodePointIterator<CharacterType>& iterator, const URLTextEncoding*& nonUTF8QueryEncoding)
{
syntaxViolation(iterator);
m_asciiBuffer.clear();
copyASCIIStringUntil(base.m_string, urlLengthUntilPart(base, part));
switch (part) {
case URLPart::QueryEnd:
m_url.m_queryEnd = base.m_queryEnd;
FALLTHROUGH;
case URLPart::PathEnd:
m_url.m_pathEnd = base.m_pathEnd;
FALLTHROUGH;
case URLPart::PathAfterLastSlash:
m_url.m_pathAfterLastSlash = base.m_pathAfterLastSlash;
FALLTHROUGH;
case URLPart::PortEnd:
m_url.m_portLength = base.m_portLength;
FALLTHROUGH;
case URLPart::HostEnd:
m_url.m_hostEnd = base.m_hostEnd;
FALLTHROUGH;
case URLPart::PasswordEnd:
m_url.m_passwordEnd = base.m_passwordEnd;
FALLTHROUGH;
case URLPart::UserEnd:
m_url.m_userEnd = base.m_userEnd;
FALLTHROUGH;
case URLPart::UserStart:
m_url.m_userStart = base.m_userStart;
FALLTHROUGH;
case URLPart::SchemeEnd:
m_url.m_isValid = base.m_isValid;
m_url.m_protocolIsInHTTPFamily = base.m_protocolIsInHTTPFamily;
m_url.m_schemeEnd = base.m_schemeEnd;
}
switch (scheme(StringView(m_asciiBuffer.data(), m_url.m_schemeEnd))) {
case Scheme::WS:
case Scheme::WSS:
nonUTF8QueryEncoding = nullptr;
m_urlIsSpecial = true;
return;
case Scheme::File:
m_urlIsFile = true;
FALLTHROUGH;
case Scheme::FTP:
case Scheme::HTTP:
case Scheme::HTTPS:
m_urlIsSpecial = true;
return;
case Scheme::NonSpecial:
m_urlIsSpecial = false;
nonUTF8QueryEncoding = nullptr;
auto pathStart = m_url.m_hostEnd + m_url.m_portLength;
if (pathStart + 2 < m_asciiBuffer.size()
&& m_asciiBuffer[pathStart] == '/'
&& m_asciiBuffer[pathStart + 1] == '.'
&& m_asciiBuffer[pathStart + 2] == '/') {
m_asciiBuffer.remove(pathStart + 1, 2);
m_url.m_pathAfterLastSlash = std::max(2u, m_url.m_pathAfterLastSlash) - 2;
m_url.m_pathEnd = std::max(2u, m_url.m_pathEnd) - 2;
m_url.m_queryEnd = std::max(2u, m_url.m_queryEnd) - 2;
}
return;
}
ASSERT_NOT_REACHED();
}
static const char dotASCIICode[2] = {'2', 'e'};
template<typename CharacterType>
ALWAYS_INLINE bool URLParser::isSingleDotPathSegment(CodePointIterator<CharacterType> c)
{
if (c.atEnd())
return false;
if (*c == '.') {
advance<CharacterType, ReportSyntaxViolation::No>(c);
return c.atEnd() || isSlashQuestionOrHash(*c);
}
if (*c != '%')
return false;
advance<CharacterType, ReportSyntaxViolation::No>(c);
if (c.atEnd() || *c != dotASCIICode[0])
return false;
advance<CharacterType, ReportSyntaxViolation::No>(c);
if (c.atEnd())
return false;
if (toASCIILower(*c) == dotASCIICode[1]) {
advance<CharacterType, ReportSyntaxViolation::No>(c);
return c.atEnd() || isSlashQuestionOrHash(*c);
}
return false;
}
template<typename CharacterType>
ALWAYS_INLINE bool URLParser::isDoubleDotPathSegment(CodePointIterator<CharacterType> c)
{
if (c.atEnd())
return false;
if (*c == '.') {
advance<CharacterType, ReportSyntaxViolation::No>(c);
return isSingleDotPathSegment(c);
}
if (*c != '%')
return false;
advance<CharacterType, ReportSyntaxViolation::No>(c);
if (c.atEnd() || *c != dotASCIICode[0])
return false;
advance<CharacterType, ReportSyntaxViolation::No>(c);
if (c.atEnd())
return false;
if (toASCIILower(*c) == dotASCIICode[1]) {
advance<CharacterType, ReportSyntaxViolation::No>(c);
return isSingleDotPathSegment(c);
}
return false;
}
template<typename CharacterType>
void URLParser::consumeSingleDotPathSegment(CodePointIterator<CharacterType>& c)
{
ASSERT(isSingleDotPathSegment(c));
if (*c == '.') {
advance(c);
if (!c.atEnd()) {
if (*c == '/' || *c == '\\')
advance(c);
else
ASSERT(*c == '?' || *c == '#');
}
} else {
ASSERT(*c == '%');
advance(c);
ASSERT(*c == dotASCIICode[0]);
advance(c);
ASSERT(toASCIILower(*c) == dotASCIICode[1]);
advance(c);
if (!c.atEnd()) {
if (*c == '/' || *c == '\\')
advance(c);
else
ASSERT(*c == '?' || *c == '#');
}
}
}
template<typename CharacterType>
void URLParser::consumeDoubleDotPathSegment(CodePointIterator<CharacterType>& c)
{
ASSERT(isDoubleDotPathSegment(c));
if (*c == '.')
advance(c);
else {
ASSERT(*c == '%');
advance(c);
ASSERT(*c == dotASCIICode[0]);
advance(c);
ASSERT(toASCIILower(*c) == dotASCIICode[1]);
advance(c);
}
consumeSingleDotPathSegment(c);
}
bool URLParser::shouldPopPath(unsigned newPathAfterLastSlash)
{
ASSERT(m_didSeeSyntaxViolation);
if (!m_urlIsFile)
return true;
ASSERT(m_url.m_pathAfterLastSlash <= m_asciiBuffer.size());
CodePointIterator<LChar> componentToPop(&m_asciiBuffer[newPathAfterLastSlash], &m_asciiBuffer[0] + m_url.m_pathAfterLastSlash);
if (newPathAfterLastSlash == m_url.m_hostEnd + m_url.m_portLength + 1 && isWindowsDriveLetter(componentToPop))
return false;
return true;
}
void URLParser::popPath()
{
ASSERT(m_didSeeSyntaxViolation);
if (m_url.m_pathAfterLastSlash > m_url.m_hostEnd + m_url.m_portLength + 1) {
auto newPathAfterLastSlash = m_url.m_pathAfterLastSlash - 1;
if (m_asciiBuffer[newPathAfterLastSlash] == '/')
newPathAfterLastSlash--;
while (newPathAfterLastSlash > m_url.m_hostEnd + m_url.m_portLength && m_asciiBuffer[newPathAfterLastSlash] != '/')
newPathAfterLastSlash--;
newPathAfterLastSlash++;
if (shouldPopPath(newPathAfterLastSlash))
m_url.m_pathAfterLastSlash = newPathAfterLastSlash;
}
m_asciiBuffer.resize(m_url.m_pathAfterLastSlash);
}
template<typename CharacterType>
void URLParser::syntaxViolation(const CodePointIterator<CharacterType>& iterator)
{
if (m_didSeeSyntaxViolation)
return;
m_didSeeSyntaxViolation = true;
ASSERT(m_asciiBuffer.isEmpty());
size_t codeUnitsToCopy = iterator.codeUnitsSince(reinterpret_cast<const CharacterType*>(m_inputBegin));
RELEASE_ASSERT(codeUnitsToCopy <= m_inputString.length());
m_asciiBuffer.reserveCapacity(m_inputString.length());
for (size_t i = 0; i < codeUnitsToCopy; ++i) {
ASSERT(isASCII(m_inputString[i]));
m_asciiBuffer.uncheckedAppend(m_inputString[i]);
}
}
void URLParser::failure()
{
m_url.invalidate();
m_url.m_string = m_inputString;
}
template<typename CharacterType>
bool URLParser::checkLocalhostCodePoint(CodePointIterator<CharacterType>& iterator, UChar32 codePoint)
{
if (iterator.atEnd() || toASCIILower(*iterator) != codePoint)
return false;