bool AbstractParser::parseField(StringView words)
{
#define PARSE_FIELD(X) \
for (const auto x : DEFINED_ROOM_##X##_TYPES) { \
if (getParserCommandName(x).matches(firstWord)) { \
setRoomFieldCommand(x, RoomField::X##_TYPE); \
return true; \
} \
}
if (words.isEmpty())
return false;
// REVISIT: support "set room field XXX" ?
const auto firstWord = words.takeFirstWord();
if (!words.isEmpty())
return false;
PARSE_FIELD(LIGHT);
PARSE_FIELD(SUNDEATH);
PARSE_FIELD(PORTABLE);
PARSE_FIELD(RIDABLE);
PARSE_FIELD(ALIGN);
return false;
#undef PARSE
}
void AbstractParser::parseName(StringView view)
{
if (!view.isEmpty()) {
auto dir = tryGetDir(view);
if (!view.isEmpty()) {
auto name = view.takeFirstWord();
nameDoorCommand(name.toQString(), dir);
return;
}
}
showSyntax("name <dir> <name>");
}
IDBKeyPathLexer::TokenType IDBKeyPathLexer::lexIdentifier(String& element)
{
StringView start = m_remainingText;
if (!m_remainingText.isEmpty() && isIdentifierStartCharacter(m_remainingText[0]))
m_remainingText = m_remainingText.substring(1);
else
return TokenError;
while (!m_remainingText.isEmpty() && isIdentifierCharacter(m_remainingText[0]))
m_remainingText = m_remainingText.substring(1);
element = start.substring(0, start.length() - m_remainingText.length()).toString();
return TokenIdentifier;
}
void Settings::remove(const StringView& _name) const
{
ini_t* ini = INI_T(m_ini);
FilePath uri(_name);
const StringView path = strTrim(uri.getPath(), "/");
const StringView& fileName = uri.getFileName();
int32_t section = INI_GLOBAL_SECTION;
if (!path.isEmpty() )
{
section = ini_find_section(ini, path.getPtr(), path.getLength() );
if (INI_NOT_FOUND == section)
{
section = INI_GLOBAL_SECTION;
}
}
int32_t property = ini_find_property(ini, section, fileName.getPtr(), fileName.getLength() );
if (INI_NOT_FOUND == property)
{
return;
}
ini_property_remove(ini, section, property);
if (INI_GLOBAL_SECTION != section
&& 0 == ini_property_count(ini, section) )
{
ini_section_remove(ini, section);
}
}
const char* Settings::get(const StringView& _name) const
{
ini_t* ini = INI_T(m_ini);
FilePath uri(_name);
const StringView path(strTrim(uri.getPath(), "/") );
const StringView& fileName(uri.getFileName() );
int32_t section = INI_GLOBAL_SECTION;
if (!path.isEmpty() )
{
section = ini_find_section(ini, path.getPtr(), path.getLength() );
if (INI_NOT_FOUND == section)
{
section = INI_GLOBAL_SECTION;
}
}
int32_t property = ini_find_property(ini, section, fileName.getPtr(), fileName.getLength() );
if (INI_NOT_FOUND == property)
{
return NULL;
}
return ini_property_value(ini, section, property);
}
TextEncoding HTMLMetaCharsetParser::encodingFromMetaAttributes(const AttributeList& attributes)
{
bool gotPragma = false;
enum { None, Charset, Pragma } mode = None;
StringView charset;
for (auto& attribute : attributes) {
const String& attributeName = attribute.first;
const String& attributeValue = attribute.second;
if (attributeName == http_equivAttr) {
if (equalIgnoringCase(attributeValue, "content-type"))
gotPragma = true;
} else if (charset.isEmpty()) {
if (attributeName == charsetAttr) {
charset = attributeValue;
mode = Charset;
} else if (attributeName == contentAttr) {
charset = extractCharset(attributeValue);
if (charset.length())
mode = Pragma;
}
}
}
if (mode == Charset || (mode == Pragma && gotPragma))
return TextEncoding(stripLeadingAndTrailingHTMLSpaces(charset.toStringWithoutCopying()));
return TextEncoding();
}
static void setWindowFeature(WindowFeatures& features, StringView key, StringView value)
{
// Listing a key with no value is shorthand for key=yes
int numericValue;
if (value.isEmpty() || equalLettersIgnoringASCIICase(value, "yes"))
numericValue = 1;
else
numericValue = value.toInt();
// We treat key of "resizable" here as an additional feature rather than setting resizeable to true.
// This is consistent with Firefox, but could also be handled at another level.
if (equalLettersIgnoringASCIICase(key, "left") || equalLettersIgnoringASCIICase(key, "screenx"))
features.x = numericValue;
else if (equalLettersIgnoringASCIICase(key, "top") || equalLettersIgnoringASCIICase(key, "screeny"))
features.y = numericValue;
else if (equalLettersIgnoringASCIICase(key, "width") || equalLettersIgnoringASCIICase(key, "innerwidth"))
features.width = numericValue;
else if (equalLettersIgnoringASCIICase(key, "height") || equalLettersIgnoringASCIICase(key, "innerheight"))
features.height = numericValue;
else if (equalLettersIgnoringASCIICase(key, "menubar"))
features.menuBarVisible = numericValue;
else if (equalLettersIgnoringASCIICase(key, "toolbar"))
features.toolBarVisible = numericValue;
else if (equalLettersIgnoringASCIICase(key, "location"))
features.locationBarVisible = numericValue;
else if (equalLettersIgnoringASCIICase(key, "status"))
features.statusBarVisible = numericValue;
else if (equalLettersIgnoringASCIICase(key, "fullscreen"))
features.fullscreen = numericValue;
else if (equalLettersIgnoringASCIICase(key, "scrollbars"))
features.scrollbarsVisible = numericValue;
else if (numericValue == 1)
features.additionalFeatures.append(key.toString());
}
void AbstractParser::parseDirections(StringView view)
{
if (view.isEmpty())
showSyntax("dirs [-(name|desc|dyncdesc|note|exits|all)] pattern");
else
doGetDirectionsCommand(view);
}
// https://wicg.github.io/entries-api/#resolve-a-relative-path
static String resolveRelativeVirtualPath(StringView baseVirtualPath, StringView relativeVirtualPath)
{
ASSERT(baseVirtualPath[0] == '/');
if (!relativeVirtualPath.isEmpty() && relativeVirtualPath[0] == '/')
return relativeVirtualPath.length() == 1 ? relativeVirtualPath.toString() : resolveRelativeVirtualPath("/", relativeVirtualPath.substring(1));
Vector<StringView> virtualPathSegments;
for (auto segment : baseVirtualPath.split('/'))
virtualPathSegments.append(segment);
for (auto segment : relativeVirtualPath.split('/')) {
ASSERT(!segment.isEmpty());
if (segment == ".")
continue;
if (segment == "..") {
if (!virtualPathSegments.isEmpty())
virtualPathSegments.removeLast();
continue;
}
virtualPathSegments.append(segment);
}
if (virtualPathSegments.isEmpty())
return "/"_s;
StringBuilder builder;
for (auto& segment : virtualPathSegments) {
builder.append('/');
builder.append(segment);
}
return builder.toString();
}
void AbstractParser::parseSearch(StringView view)
{
if (view.isEmpty())
showSyntax("search [-(name|desc|dyncdesc|note|exits|all)] pattern");
else
doSearchCommand(view);
}
WindowFeatures parseWindowFeatures(StringView featuresString)
{
// The IE rule is: all features except for channelmode and fullscreen default to YES, but
// if the user specifies a feature string, all features default to NO. (There is no public
// standard that applies to this method.)
//
// <http://msdn.microsoft.com/workshop/author/dhtml/reference/methods/open_0.asp>
// We always allow a window to be resized, which is consistent with Firefox.
WindowFeatures features;
if (featuresString.isEmpty())
return features;
features.menuBarVisible = false;
features.statusBarVisible = false;
features.toolBarVisible = false;
features.locationBarVisible = false;
features.scrollbarsVisible = false;
processFeaturesString(featuresString, [&features](StringView key, StringView value) {
setWindowFeature(features, key, value);
});
return features;
}
bool AbstractParser::parseExitFlag(const ExitFlag flag, StringView words)
{
const auto dir = tryGetDir(words);
if (!words.isEmpty())
return false;
toggleExitFlagCommand(flag, dir);
return true;
}
bool AbstractParser::parseLoadFlags(StringView words)
{
if (words.isEmpty())
return false;
const auto firstWord = words.takeFirstWord();
if (!words.isEmpty())
return false;
for (const RoomLoadFlag loadFlag : ALL_LOAD_FLAGS) {
if (getParserCommandName(loadFlag).matches(firstWord)) {
toggleRoomFlagCommand(loadFlag, RoomField::LOAD_FLAGS);
return true;
}
}
return false;
}
bool AbstractParser::parseDoorAction(const DoorActionType dat, StringView words)
{
const auto dir = tryGetDir(words);
if (!words.isEmpty())
return false;
performDoorCommand(dir, dat);
return true;
}
void AbstractParser::parseGroupTell(const StringView &view)
{
if (view.isEmpty())
sendToUser("What do you want to tell the group?\r\n");
else {
emit sendGroupTellEvent(view.toQByteArray());
sendToUser("OK.\r\n");
}
}
// https://wicg.github.io/entries-api/#valid-path
static bool isValidVirtualPath(StringView virtualPath)
{
if (virtualPath.isEmpty())
return true;
if (virtualPath[0] == '/') {
// An absolute path is a string consisting of '/' (U+002F SOLIDUS) followed by one or more path segments joined by '/' (U+002F SOLIDUS).
return isZeroOrMorePathSegmentsSeparatedBySlashes(virtualPath.substring(1));
}
return isValidRelativeVirtualPath(virtualPath);
}
// https://wicg.github.io/entries-api/#relative-path
static bool isValidRelativeVirtualPath(StringView virtualPath)
{
if (virtualPath.isEmpty())
return false;
if (virtualPath[0] == '/')
return false;
return isZeroOrMorePathSegmentsSeparatedBySlashes(virtualPath);
}
void AbstractParser::parseSpecialCommand(StringView wholeCommand)
{
if (wholeCommand.isEmpty())
throw std::runtime_error("input is empty");
if (evalSpecialCommandMap(wholeCommand))
return;
const auto word = wholeCommand.takeFirstWord();
sendToUser(QString("Unrecognized command: %1\r\n").arg(word.toQString()));
}
// https://wicg.github.io/entries-api/#path-segment
static bool isValidPathSegment(StringView segment)
{
if (segment.isEmpty() || segment == "." || segment == "..")
return true;
for (unsigned i = 0; i < segment.length(); ++i) {
if (!isValidPathNameCharacter(segment[i]))
return false;
}
return true;
}
void AbstractParser::parseGroupKick(const StringView &view)
{
if (view.isEmpty())
sendToUser("Who do you want to kick from the group?\r\n");
else {
// REVISIT: We should change GroupManager to be a "FrontEnd" in this
// thread and call it directly
emit sendGroupKickEvent(view.toQByteArray().simplified());
sendToUser("OK.\r\n");
}
}
IDBKeyPathLexer::TokenType IDBKeyPathLexer::lex(String& element)
{
if (m_remainingText.isEmpty())
return TokenEnd;
if (m_remainingText[0] == '.') {
m_remainingText = m_remainingText.substring(1);
return TokenDot;
}
return lexIdentifier(element);
}
bool AbstractParser::parseExitFlags(StringView words)
{
if (words.isEmpty())
return false;
const auto firstWord = words.takeFirstWord();
for (const ExitFlag flag : ALL_EXIT_FLAGS) {
if (getParserCommandName(flag).matches(firstWord)) {
return parseExitFlag(flag, words);
}
}
return false;
}
bool AbstractParser::parseDoorAction(StringView words)
{
if (words.isEmpty())
return false;
const auto firstWord = words.takeFirstWord();
for (const DoorActionType dat : ALL_DOOR_ACTION_TYPES) {
if (getParserCommandName(dat).matches(firstWord)) {
return parseDoorAction(dat, words);
}
}
return false;
}
void AbstractParser::parseSetCommand(StringView view)
{
if (view.isEmpty()) {
sendToUser(QString("Syntax: %1set prefix [punct-char]\r\n").arg(prefixChar));
return;
}
auto first = view.takeFirstWord();
if (Abbrev{"prefix", 3}.matches(first)) {
if (view.isEmpty()) {
showCommandPrefix();
return;
}
auto next = view.takeFirstWord();
if (next.size() == 3) {
auto quote = next.takeFirstLetter();
const bool validQuote = quote == '\'' || quote == '"';
const auto prefix = next.takeFirstLetter().toLatin1();
if (validQuote && isValidPrefix(prefix) && quote == next.takeFirstLetter()
&& quote != prefix && setCommandPrefix(prefix)) {
return;
}
} else if (next.size() == 1) {
const auto prefix = next.takeFirstLetter().toLatin1();
if (setCommandPrefix(prefix)) {
return;
}
}
sendToUser("Invalid prefix.\r\n");
return;
}
sendToUser("That variable is not supported.");
}
void AbstractParser::parseHelp(StringView words)
{
if (words.isEmpty()) {
showHelp();
return;
}
auto next = words.takeFirstWord();
if (Abbrev{"abbreviations", 2}.matches(next)) {
showHelpCommands(true);
return;
} else if (Abbrev{"commands", 1}.matches(next)) {
showHelpCommands(false);
return;
}
auto &map = m_specialCommandMap;
auto name = next.toQString().toStdString();
auto it = map.find(name);
if (it != map.end()) {
it->second.help(name);
return;
}
if (Abbrev{"map", 1}.matches(next))
showMapHelp();
else if (Abbrev{"door", 1}.matches(next))
showDoorCommandHelp();
else if (Abbrev{"group", 1}.matches(next))
showGroupHelp();
else if (Abbrev{"exits", 2}.matches(next))
showExitHelp();
else if (Abbrev{"flags", 1}.matches(next))
showRoomSimpleFlagsHelp();
else if (Abbrev{"mobiles", 2}.matches(next))
showRoomMobFlagsHelp();
else if (Abbrev{"load", 2}.matches(next))
showRoomLoadFlagsHelp();
else if (Abbrev{"miscellaneous", 2}.matches(next))
showMiscHelp();
else {
showHelp();
}
}
bool MultipartHandle::parseHeadersIfPossible()
{
size_t contentLength = m_buffer.size();
if (!contentLength)
return false;
const char* content = m_buffer.data();
// Check if we have the header closing strings.
if (!strnstr(content, "\r\n\r\n", contentLength)) {
// Some servers closes the headers with only \n-s.
if (!strnstr(content, "\n\n", contentLength)) {
// Don't have the header closing string. Wait for more data.
return false;
}
}
// Parse the HTTP headers.
String value;
StringView name;
char* p = const_cast<char*>(content);
const char* end = content + contentLength;
size_t totalConsumedLength = 0;
for (; p < end; ++p) {
String failureReason;
size_t consumedLength = parseHTTPHeader(p, end - p, failureReason, name, value, false);
if (!consumedLength)
break; // No more header to parse.
p += consumedLength;
totalConsumedLength += consumedLength;
// The name should not be empty, but the value could be empty.
if (name.isEmpty())
break;
m_headers.add(name.toString(), value);
}
m_buffer.remove(0, totalConsumedLength + 1);
return true;
}
void Settings::set(const StringView& _name, const StringView& _value)
{
ini_t* ini = INI_T(m_ini);
FilePath uri(_name);
const StringView path(strTrim(uri.getPath(), "/") );
const StringView& fileName(uri.getFileName() );
int32_t section = INI_GLOBAL_SECTION;
if (!path.isEmpty() )
{
section = ini_find_section(ini, path.getPtr(), path.getLength() );
if (INI_NOT_FOUND == section)
{
section = ini_section_add(ini, path.getPtr(), path.getLength() );
}
}
int32_t property = ini_find_property(ini, section, fileName.getPtr(), fileName.getLength() );
if (INI_NOT_FOUND == property)
{
ini_property_add(
ini
, section
, fileName.getPtr()
, fileName.getLength()
, _value.getPtr()
, _value.getLength()
);
}
else
{
ini_property_value_set(
ini
, section
, property
, _value.getPtr()
, _value.getLength()
);
}
}
CString TextEncoding::encode(StringView text, UnencodableHandling handling) const
{
if (!m_name)
return CString();
if (text.isEmpty())
return "";
// FIXME: What's the right place to do normalization?
// It's a little strange to do it inside the encode function.
// Perhaps normalization should be an explicit step done before calling encode.
auto upconvertedCharacters = text.upconvertedCharacters();
const UChar* source = upconvertedCharacters;
size_t sourceLength = text.length();
Vector<UChar> normalizedCharacters;
UErrorCode err = U_ZERO_ERROR;
if (unorm_quickCheck(source, sourceLength, UNORM_NFC, &err) != UNORM_YES) {
// First try using the length of the original string, since normalization to NFC rarely increases length.
normalizedCharacters.grow(sourceLength);
int32_t normalizedLength = unorm_normalize(source, sourceLength, UNORM_NFC, 0, normalizedCharacters.data(), sourceLength, &err);
if (err == U_BUFFER_OVERFLOW_ERROR) {
err = U_ZERO_ERROR;
normalizedCharacters.resize(normalizedLength);
normalizedLength = unorm_normalize(source, sourceLength, UNORM_NFC, 0, normalizedCharacters.data(), normalizedLength, &err);
}
ASSERT(U_SUCCESS(err));
source = normalizedCharacters.data();
sourceLength = normalizedLength;
}
return newTextCodec(*this)->encode(source, sourceLength, handling);
}
bool AbstractParser::parsePrint(StringView &input)
{
const auto syntax = [this]() { sendToUser("Print what? [dynamic | static | note]\r\n"); };
if (input.isEmpty()) {
syntax();
return true;
}
const auto next = input.takeFirstWord();
if (Abbrev{"dynamic", 1}.matches(next)) {
printRoomInfo(dynamicRoomFields);
return true;
} else if (Abbrev{"static", 1}.matches(next)) {
printRoomInfo(staticRoomFields);
return true;
} else if (Abbrev{"note", 1}.matches(next)) {
showNote();
return true;
} else {
syntax();
return true;
}
}
const char* WebSocketHandshake::readHTTPHeaders(const char* start, const char* end)
{
StringView name;
String value;
bool sawSecWebSocketExtensionsHeaderField = false;
bool sawSecWebSocketAcceptHeaderField = false;
bool sawSecWebSocketProtocolHeaderField = false;
const char* p = start;
for (; p < end; p++) {
size_t consumedLength = parseHTTPHeader(p, end - p, m_failureReason, name, value);
if (!consumedLength)
return nullptr;
p += consumedLength;
// Stop once we consumed an empty line.
if (name.isEmpty())
break;
HTTPHeaderName headerName;
if (!findHTTPHeaderName(name, headerName)) {
// Evidence in the wild shows that services make use of custom headers in the handshake
m_serverHandshakeResponse.addHTTPHeaderField(name.toString(), value);
continue;
}
// https://tools.ietf.org/html/rfc7230#section-3.2.4
// "Newly defined header fields SHOULD limit their field values to US-ASCII octets."
if ((headerName == HTTPHeaderName::SecWebSocketExtensions
|| headerName == HTTPHeaderName::SecWebSocketAccept
|| headerName == HTTPHeaderName::SecWebSocketProtocol)
&& !value.containsOnlyASCII()) {
m_failureReason = makeString(name, " header value should only contain ASCII characters");
return nullptr;
}
if (headerName == HTTPHeaderName::SecWebSocketExtensions) {
if (sawSecWebSocketExtensionsHeaderField) {
m_failureReason = ASCIILiteral("The Sec-WebSocket-Extensions header must not appear more than once in an HTTP response");
return nullptr;
}
if (!m_extensionDispatcher.processHeaderValue(value)) {
m_failureReason = m_extensionDispatcher.failureReason();
return nullptr;
}
sawSecWebSocketExtensionsHeaderField = true;
} else {
if (headerName == HTTPHeaderName::SecWebSocketAccept) {
if (sawSecWebSocketAcceptHeaderField) {
m_failureReason = ASCIILiteral("The Sec-WebSocket-Accept header must not appear more than once in an HTTP response");
return nullptr;
}
sawSecWebSocketAcceptHeaderField = true;
} else if (headerName == HTTPHeaderName::SecWebSocketProtocol) {
if (sawSecWebSocketProtocolHeaderField) {
m_failureReason = ASCIILiteral("The Sec-WebSocket-Protocol header must not appear more than once in an HTTP response");
return nullptr;
}
sawSecWebSocketProtocolHeaderField = true;
}
m_serverHandshakeResponse.addHTTPHeaderField(headerName, value);
}
}
return p;
}
