diff options
| -rw-r--r-- | src/network/access/qnetworkcookie.cpp | 437 |
1 files changed, 384 insertions, 53 deletions
diff --git a/src/network/access/qnetworkcookie.cpp b/src/network/access/qnetworkcookie.cpp index a327bc0..b127f18 100644 --- a/src/network/access/qnetworkcookie.cpp +++ b/src/network/access/qnetworkcookie.cpp @@ -49,6 +49,7 @@ #include "QtCore/qlist.h" #include "QtCore/qlocale.h" #include "QtCore/qstring.h" +#include "QtCore/qstringlist.h" #include "QtCore/qurl.h" #include "private/qobject_p.h" @@ -513,6 +514,385 @@ QByteArray QNetworkCookie::toRawForm(RawForm form) const return result; } +static const char zones[] = + "pst\0" // -8 + "pdt\0" + "mst\0" // -7 + "mdt\0" + "cst\0" // -6 + "cdt\0" + "est\0" // -5 + "edt\0" + "ast\0" // -4 + "nst\0" // -3 + "gmt\0" // 0 + "utc\0" + "bst\0" + "met\0" // 1 + "eet\0" // 2 + "jst\0" // 9 + "\0"; +static int zoneOffsets[] = {-8, -8, -7, -7, -6, -6, -5, -5, -4, -3, 0, 0, 0, 1, 2, 9 }; + +static const char months[] = + "jan\0" + "feb\0" + "mar\0" + "apr\0" + "may\0" + "jun\0" + "jul\0" + "aug\0" + "sep\0" + "oct\0" + "nov\0" + "dec\0" + "\0"; + +static inline bool isNumber(char s) { return s >= '0' && s <= '9'; } +static inline bool isTerminator (char c) { return c == '\n' || c == '\r'; } +static inline bool isValueSeparator (char c) { return isTerminator(c) || c == ';'; } +static inline bool isWhitespace (char c) { return c == ' ' || c == '\t'; } + +static bool checkStaticArray(int &val, const QByteArray &dateString, int at, const char *array, size_t size) { + if (dateString[at] < 'a' || dateString[at] > 'z') + return false; + if (val == -1 && dateString.length() >= at + 3) { + int j = 0; + size_t i = 0; + while (i <= size) { + const char *str(array + i); + if (str[0] == dateString[at] + && str[1] == dateString[at + 1] + && str[2] == dateString[at + 2]) { + val = j; + return true; + } + i += strlen(str) + 1; + ++j; + } + } + return false; +} + +//#define PARSEDATESTRINGDEBUG + +#define ADAY 1 +#define AMONTH 2 +#define AYEAR 4 + +/* + Parse all the date formats that Firefox can. + + The official format is: + expires=ddd(d)?, dd-MMM-yyyy hh:mm:ss GMT + + But browsers have been supporting a very wide range of date + strings. To work on many sites we need to support more then + just the official date format. + + For reference see Firefox's PR_ParseTimeStringToExplodedTime in + prtime.c. The Firefox date parser is coded in a very complex way + and is slightly over ~700 lines long. While this implementation + will be slightly slower for the non standard dates it is smaller, + more readable, and maintainable. + + Or in their own words: + "} // else what the hell is this." +*/ +static QDateTime parseDateString(const QByteArray &dateString) +{ + QTime time; + // placeholders for values when we are not sure it is a year, month or day + int unknown[3] = {-1, -1, -1}; + int month = -1; + int day = -1; + int year = -1; + int zoneOffset = -1; + + // hour:minute:second.ms pm + QRegExp timeRx(QLatin1String("(\\d{1,2}):(\\d{1,2})(:(\\d{1,2})|)(\\.(\\d{1,3})|)((\\s{0,}(am|pm))|)")); + + int at = 0; + while (at < dateString.length()) { +#ifdef PARSEDATESTRINGDEBUG + qDebug() << dateString.mid(at); +#endif + bool isNum = isNumber(dateString[at]); + + // Month + if (!isNum + && checkStaticArray(month, dateString, at, months, sizeof(months)- 1)) { + ++month; +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Month:" << month; +#endif + at += 3; + continue; + } + // Zone + if (!isNum + && zoneOffset == -1 + && checkStaticArray(zoneOffset, dateString, at, zones, sizeof(zones)- 1)) { + int sign = (at >= 0 && dateString[at - 1] == '-') ? -1 : 1; + zoneOffset = sign * zoneOffsets[zoneOffset] * 60 * 60; +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Zone:" << month; +#endif + at += 3; + continue; + } + // Zone offset + if (!isNum + && (zoneOffset == -1 || zoneOffset == 0) // Can only go after gmt + && (dateString[at] == '+' || dateString[at] == '-') + && (at == 0 + || isWhitespace(dateString[at - 1]) + || dateString[at - 1] == ',' + || (dateString[at - 1] == 't'))) { + + int end = 1; + while (dateString[at + end] >= '0' && dateString[at + end] <= '9' + && end < 5) + ++end; + int minutes = 0; + int hours = 0; + switch (end - 1) { + case 4: + minutes = atoi(dateString.mid(at + 3, 2).constData()); + // fall through + case 2: + hours = atoi(dateString.mid(at + 1, 2).constData()); + break; + case 1: + hours = atoi(dateString.mid(at + 1, 1).constData()); + break; + default: + at += end; + continue; + } + if (end != 1) { + int sign = dateString[at] == '-' ? -1 : 1; + zoneOffset = sign * ((minutes * 60) + (hours * 60 * 60)); +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Zone offset:" << zoneOffset << hours << minutes; +#endif + at += end; + continue; + } + } + + // Time + if (isNum && time.isNull() + && dateString.length() >= at + 3 + && (dateString[at + 2] == ':' || dateString[at + 1] == ':')) { + // While the date can be found all over the string the format + // for the time is set and a nice regexp can be used. + int pos = timeRx.indexIn(QLatin1String(dateString), at); + if (pos != -1) { + QStringList list = timeRx.capturedTexts(); + int h = atoi(list.at(1).toLatin1().constData()); + int m = atoi(list.at(2).toLatin1().constData()); + int s = atoi(list.at(4).toLatin1().constData()); + int ms = atoi(list.at(6).toLatin1().constData()); + if (h < 12 && !list.at(9).isEmpty()) + if (list.at(9) == QLatin1String("pm")) + h += 12; + time = QTime(h, m, s, ms); +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Time:" << list << timeRx.matchedLength(); +#endif + at += timeRx.matchedLength(); + continue; + } + } + + // 4 digit Year + if (isNum + && year == -1 + && dateString.length() >= at + 3) { + if (isNumber(dateString[at + 1]) + && isNumber(dateString[at + 2]) + && isNumber(dateString[at + 3])) { + year = atoi(dateString.mid(at, 4).constData()); + at += 4; +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Year:" << year; +#endif + continue; + } + } + + // a one or two digit number + // Could be month, day or year + if (isNum) { + int length = 1; + if (dateString.length() >= at + 1 + && isNumber(dateString[at + 1])) + ++length; + int x = atoi(dateString.mid(at, length).constData()); + if (year == -1 && (x > 31 || x == 0)) { + year = x; + } else { + if (unknown[0] == -1) unknown[0] = x; + else if (unknown[1] == -1) unknown[1] = x; + else if (unknown[2] == -1) unknown[2] = x; + } + at += length; +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Saving" << x; +#endif + continue; + } + + // Unknown character, typically a weekday such as 'Mon' + ++at; + } + + // Once we are done parsing the string take the digits in unknown + // and determine which is the unknown year/month/day + + int couldBe[3] = { 0, 0, 0 }; + int unknownCount = 3; + for (int i = 0; i < unknownCount; ++i) { + if (unknown[i] == -1) { + couldBe[i] = ADAY | AYEAR | AMONTH; + unknownCount = i; + continue; + } + + if (unknown[i] >= 1) + couldBe[i] = ADAY; + + if (month == -1 && unknown[i] >= 1 && unknown[i] <= 12) + couldBe[i] |= AMONTH; + + if (year == -1) + couldBe[i] |= AYEAR; + } + + // For any possible day make sure one of the values that could be a month + // can contain that day. + // For any possible month make sure one of the values that can be a + // day that month can have. + // Example: 31 11 06 + // 31 can't be a day because 11 and 6 don't have 31 days + for (int i = 0; i < unknownCount; ++i) { + int currentValue = unknown[i]; + bool findMatchingMonth = couldBe[i] & ADAY && currentValue >= 29; + bool findMatchingDay = couldBe[i] & AMONTH; + if (!findMatchingMonth || !findMatchingDay) + continue; + for (int j = 0; j < 3; ++j) { + if (j == i) + continue; + for (int k = 0; k < 2; ++k) { + if (k == 0 && !(findMatchingMonth && (couldBe[j] & AMONTH))) + continue; + else if (k == 1 && !(findMatchingDay && (couldBe[j] & ADAY))) + continue; + int m = currentValue; + int d = unknown[j]; + if (k == 0) + qSwap(m, d); + if (m == -1) m = month; + bool found = true; + switch(m) { + case 2: + // When we get 29 and the year ends up having only 28 + // See date.isValid below + // Example: 29 23 Feb + if (d <= 29) + found = false; + break; + case 4: case 6: case 9: case 11: + if (d <= 30) + found = false; + break; + default: + if (d > 0 && d <= 31) + found = false; + } + if (k == 0) findMatchingMonth = found; + else if (k == 1) findMatchingDay = found; + } + } + if (findMatchingMonth) + couldBe[i] &= ~ADAY; + if (findMatchingDay) + couldBe[i] &= ~AMONTH; + } + + // First set the year/month/day that have been deduced + // and reduce the set as we go along to deduce more + for (int i = 0; i < unknownCount; ++i) { + int unset = 0; + for (int j = 0; j < 3; ++j) { + if (couldBe[j] == ADAY && day == -1) { + day = unknown[j]; + unset |= ADAY; + } else if (couldBe[j] == AMONTH && month == -1) { + month = unknown[j]; + unset |= AMONTH; + } else if (couldBe[j] == AYEAR && year == -1) { + year = unknown[j]; + unset |= AYEAR; + } else { + // common case + break; + } + couldBe[j] &= ~unset; + } + } + + // Now fallback to a standardized order to fill in the rest with + for (int i = 0; i < unknownCount; ++i) { + if (couldBe[i] & AMONTH && month == -1) month = unknown[i]; + else if (couldBe[i] & ADAY && day == -1) day = unknown[i]; + else if (couldBe[i] & AYEAR && year == -1) year = unknown[i]; + } +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Final set" << year << month << day; +#endif + + if (year == -1 || month == -1 || day == -1) { +#ifdef PARSEDATESTRINGDEBUG + qDebug() << "Parser failure" << year << month << day; +#endif + return QDateTime(); + } + + // Y2k behavior + int y2k = 0; + if (year < 70) + y2k = 2000; + else if (year < 100) + y2k = 1900; + + QDate date(year + y2k, month, day); + + // When we were given a bad cookie that when parsed + // set the day to 29 and the year to one that doesn't + // have the 29th of Feb rather then adding the extra + // complicated checking earlier just swap here. + // Example: 29 23 Feb + if (!date.isValid()) + date = QDate(day + y2k, month, year); + + QDateTime dateTime; + + if (zoneOffset == -1) { + dateTime = QDateTime(date, time); + dateTime = dateTime.toTimeSpec(Qt::UTC); + } else { + dateTime = QDateTime(date, time, Qt::UTC); + dateTime = dateTime.addSecs(zoneOffset); + } + if (!dateTime.isValid()) + return QDateTime(); + return dateTime; +} + /*! Parses the cookie string \a cookieString as received from a server response in the "Set-Cookie:" header. If there's a parsing error, @@ -572,64 +952,15 @@ QList<QNetworkCookie> QNetworkCookie::parseCookies(const QByteArray &cookieStrin field.first = field.first.toLower(); // everything but the NAME=VALUE is case-insensitive if (field.first == "expires") { - static const char dateFormats[] = - "d-MMM-yyyy hh:mm:ss\0" - "d MMM yyyy hh:mm:ss\0" - "d-MMM-yy hh:mm:ss\0" - "\0"; - - // expires is a special case because it contains a naked comma - // and naked spaces. The format is: - // expires=ddd(d)?, dd-MMM-yyyy hh:mm:ss GMT - // but we also accept standard HTTP dates - - // make sure we're at the comma - if (position >= length || cookieString.at(position) != ',') - // invalid cookie string - return QList<QNetworkCookie>(); - - ++position; + position -= field.second.length(); int end; for (end = position; end < length; ++end) - if (cookieString.at(end) == ',' || cookieString.at(end) == ';') + if (isValueSeparator(cookieString.at(end))) break; - QByteArray datestring = cookieString.mid(position, end - position).trimmed(); + QByteArray dateString = cookieString.mid(position, end - position).trimmed(); position = end; - if (datestring.endsWith(" GMT") || datestring.endsWith(" UTC")) - datestring.chop(4); - else if (datestring.endsWith(" +0000")) - datestring.chop(6); - - size_t i = 0; - int j = 0; - QLocale cLocale = QLocale::c(); - QDateTime dt; - do { - QLatin1String df(dateFormats + i); - i += strlen(dateFormats + i) + 1; - -#ifndef QT_NO_DATESTRING - dt = cLocale.toDateTime(QString::fromLatin1(datestring), df); - - // some cookies are set with a two-digit year - // (although this is not allowed); this is interpreted as a year - // in the 20th century by QDateTime. - // Work around this case here (assuming 00-69 is 21st century, - // 70-99 is 20th century) - QDate date = dt.date(); - if (j == 2 && date.year() >= 1900 && date.year() < 1970) - dt = dt.addYears(100); - if (date.year() >= 0 && date.year() < 100) - dt = dt.addYears(1900); -#endif - j++; - } while (!dt.isValid() && i <= sizeof dateFormats - 1); - if (!dt.isValid()) - // invalid cookie string - return QList<QNetworkCookie>(); - - dt.setTimeSpec(Qt::UTC); + QDateTime dt = parseDateString(dateString.toLower()); cookie.setExpirationDate(dt); } else if (field.first == "domain") { QByteArray rawDomain = field.second; |