Files
qBittorrent/src/base/rss/rss_parser.cpp
2023-06-24 16:04:04 +03:00

854 lines
44 KiB
C++

/*
* Bittorrent Client using Qt and libtorrent.
* Copyright (C) 2015 Vladimir Golovnev <glassez@yandex.ru>
* Copyright (C) 2012 Christophe Dumez <chris@qbittorrent.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* In addition, as a special exception, the copyright holders give permission to
* link this program with the OpenSSL project's "OpenSSL" library (or with
* modified versions of it that use the same license as the "OpenSSL" library),
* and distribute the linked executables. You must obey the GNU General Public
* License in all respects for all of the code used other than "OpenSSL". If you
* modify file(s), you may extend this exception to your version of the file(s),
* but you are not obligated to do so. If you do not wish to do so, delete this
* exception statement from your version.
*/
#include "rss_parser.h"
#include <QDateTime>
#include <QDebug>
#include <QGlobalStatic>
#include <QHash>
#include <QMetaObject>
#include <QRegularExpression>
#include <QStringList>
#include <QVariant>
#include <QXmlStreamEntityResolver>
#include <QXmlStreamReader>
#include "base/global.h"
#include "rss_article.h"
namespace
{
class XmlStreamEntityResolver final : public QXmlStreamEntityResolver
{
public:
QString resolveUndeclaredEntity(const QString &name) override
{
// (X)HTML entities declared in:
// http://www.w3.org/TR/xhtml1/DTD/xhtml-lat1.ent
// http://www.w3.org/TR/xhtml1/DTD/xhtml-symbol.ent
// http://www.w3.org/TR/xhtml1/DTD/xhtml-special.ent
static const QHash<QString, QString> HTMLEntities
{
{u"nbsp"_s, u"&#160;"_s}, // no-break space = non-breaking space, U+00A0 ISOnum
{u"iexcl"_s, u"&#161;"_s}, // inverted exclamation mark, U+00A1 ISOnum
{u"cent"_s, u"&#162;"_s}, // cent sign, U+00A2 ISOnum
{u"pound"_s, u"&#163;"_s}, // pound sign, U+00A3 ISOnum
{u"curren"_s, u"&#164;"_s}, // currency sign, U+00A4 ISOnum
{u"yen"_s, u"&#165;"_s}, // yen sign = yuan sign, U+00A5 ISOnum
{u"brvbar"_s, u"&#166;"_s}, // broken bar = broken vertical bar, U+00A6 ISOnum
{u"sect"_s, u"&#167;"_s}, // section sign, U+00A7 ISOnum
{u"uml"_s, u"&#168;"_s}, // diaeresis = spacing diaeresis, U+00A8 ISOdia
{u"copy"_s, u"&#169;"_s}, // copyright sign, U+00A9 ISOnum
{u"ordf"_s, u"&#170;"_s}, // feminine ordinal indicator, U+00AA ISOnum
{u"laquo"_s, u"&#171;"_s}, // left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum
{u"not"_s, u"&#172;"_s}, // not sign = angled dash, U+00AC ISOnum
{u"shy"_s, u"&#173;"_s}, // soft hyphen = discretionary hyphen, U+00AD ISOnum
{u"reg"_s, u"&#174;"_s}, // registered sign = registered trade mark sign, U+00AE ISOnum
{u"macr"_s, u"&#175;"_s}, // macron = spacing macron = overline = APL overbar, U+00AF ISOdia
{u"deg"_s, u"&#176;"_s}, // degree sign, U+00B0 ISOnum
{u"plusmn"_s, u"&#177;"_s}, // plus-minus sign = plus-or-minus sign, U+00B1 ISOnum
{u"sup2"_s, u"&#178;"_s}, // superscript two = superscript digit two = squared, U+00B2 ISOnum
{u"sup3"_s, u"&#179;"_s}, // superscript three = superscript digit three = cubed, U+00B3 ISOnum
{u"acute"_s, u"&#180;"_s}, // acute accent = spacing acute, U+00B4 ISOdia
{u"micro"_s, u"&#181;"_s}, // micro sign, U+00B5 ISOnum
{u"para"_s, u"&#182;"_s}, // pilcrow sign = paragraph sign, U+00B6 ISOnum
{u"middot"_s, u"&#183;"_s}, // middle dot = Georgian comma = Greek middle dot, U+00B7 ISOnum
{u"cedil"_s, u"&#184;"_s}, // cedilla = spacing cedilla, U+00B8 ISOdia
{u"sup1"_s, u"&#185;"_s}, // superscript one = superscript digit one, U+00B9 ISOnum
{u"ordm"_s, u"&#186;"_s}, // masculine ordinal indicator, U+00BA ISOnum
{u"raquo"_s, u"&#187;"_s}, // right-pointing double angle quotation mark = right pointing guillemet, U+00BB ISOnum
{u"frac14"_s, u"&#188;"_s}, // vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum
{u"frac12"_s, u"&#189;"_s}, // vulgar fraction one half = fraction one half, U+00BD ISOnum
{u"frac34"_s, u"&#190;"_s}, // vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum
{u"iquest"_s, u"&#191;"_s}, // inverted question mark = turned question mark, U+00BF ISOnum
{u"Agrave"_s, u"&#192;"_s}, // latin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1
{u"Aacute"_s, u"&#193;"_s}, // latin capital letter A with acute, U+00C1 ISOlat1
{u"Acirc"_s, u"&#194;"_s}, // latin capital letter A with circumflex, U+00C2 ISOlat1
{u"Atilde"_s, u"&#195;"_s}, // latin capital letter A with tilde, U+00C3 ISOlat1
{u"Auml"_s, u"&#196;"_s}, // latin capital letter A with diaeresis, U+00C4 ISOlat1
{u"Aring"_s, u"&#197;"_s}, // latin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1
{u"AElig"_s, u"&#198;"_s}, // latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1
{u"Ccedil"_s, u"&#199;"_s}, // latin capital letter C with cedilla, U+00C7 ISOlat1
{u"Egrave"_s, u"&#200;"_s}, // latin capital letter E with grave, U+00C8 ISOlat1
{u"Eacute"_s, u"&#201;"_s}, // latin capital letter E with acute, U+00C9 ISOlat1
{u"Ecirc"_s, u"&#202;"_s}, // latin capital letter E with circumflex, U+00CA ISOlat1
{u"Euml"_s, u"&#203;"_s}, // latin capital letter E with diaeresis, U+00CB ISOlat1
{u"Igrave"_s, u"&#204;"_s}, // latin capital letter I with grave, U+00CC ISOlat1
{u"Iacute"_s, u"&#205;"_s}, // latin capital letter I with acute, U+00CD ISOlat1
{u"Icirc"_s, u"&#206;"_s}, // latin capital letter I with circumflex, U+00CE ISOlat1
{u"Iuml"_s, u"&#207;"_s}, // latin capital letter I with diaeresis, U+00CF ISOlat1
{u"ETH"_s, u"&#208;"_s}, // latin capital letter ETH, U+00D0 ISOlat1
{u"Ntilde"_s, u"&#209;"_s}, // latin capital letter N with tilde, U+00D1 ISOlat1
{u"Ograve"_s, u"&#210;"_s}, // latin capital letter O with grave, U+00D2 ISOlat1
{u"Oacute"_s, u"&#211;"_s}, // latin capital letter O with acute, U+00D3 ISOlat1
{u"Ocirc"_s, u"&#212;"_s}, // latin capital letter O with circumflex, U+00D4 ISOlat1
{u"Otilde"_s, u"&#213;"_s}, // latin capital letter O with tilde, U+00D5 ISOlat1
{u"Ouml"_s, u"&#214;"_s}, // latin capital letter O with diaeresis, U+00D6 ISOlat1
{u"times"_s, u"&#215;"_s}, // multiplication sign, U+00D7 ISOnum
{u"Oslash"_s, u"&#216;"_s}, // latin capital letter O with stroke = latin capital letter O slash, U+00D8 ISOlat1
{u"Ugrave"_s, u"&#217;"_s}, // latin capital letter U with grave, U+00D9 ISOlat1
{u"Uacute"_s, u"&#218;"_s}, // latin capital letter U with acute, U+00DA ISOlat1
{u"Ucirc"_s, u"&#219;"_s}, // latin capital letter U with circumflex, U+00DB ISOlat1
{u"Uuml"_s, u"&#220;"_s}, // latin capital letter U with diaeresis, U+00DC ISOlat1
{u"Yacute"_s, u"&#221;"_s}, // latin capital letter Y with acute, U+00DD ISOlat1
{u"THORN"_s, u"&#222;"_s}, // latin capital letter THORN, U+00DE ISOlat1
{u"szlig"_s, u"&#223;"_s}, // latin small letter sharp s = ess-zed, U+00DF ISOlat1
{u"agrave"_s, u"&#224;"_s}, // latin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1
{u"aacute"_s, u"&#225;"_s}, // latin small letter a with acute, U+00E1 ISOlat1
{u"acirc"_s, u"&#226;"_s}, // latin small letter a with circumflex, U+00E2 ISOlat1
{u"atilde"_s, u"&#227;"_s}, // latin small letter a with tilde, U+00E3 ISOlat1
{u"auml"_s, u"&#228;"_s}, // latin small letter a with diaeresis, U+00E4 ISOlat1
{u"aring"_s, u"&#229;"_s}, // latin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1
{u"aelig"_s, u"&#230;"_s}, // latin small letter ae = latin small ligature ae, U+00E6 ISOlat1
{u"ccedil"_s, u"&#231;"_s}, // latin small letter c with cedilla, U+00E7 ISOlat1
{u"egrave"_s, u"&#232;"_s}, // latin small letter e with grave, U+00E8 ISOlat1
{u"eacute"_s, u"&#233;"_s}, // latin small letter e with acute, U+00E9 ISOlat1
{u"ecirc"_s, u"&#234;"_s}, // latin small letter e with circumflex, U+00EA ISOlat1
{u"euml"_s, u"&#235;"_s}, // latin small letter e with diaeresis, U+00EB ISOlat1
{u"igrave"_s, u"&#236;"_s}, // latin small letter i with grave, U+00EC ISOlat1
{u"iacute"_s, u"&#237;"_s}, // latin small letter i with acute, U+00ED ISOlat1
{u"icirc"_s, u"&#238;"_s}, // latin small letter i with circumflex, U+00EE ISOlat1
{u"iuml"_s, u"&#239;"_s}, // latin small letter i with diaeresis, U+00EF ISOlat1
{u"eth"_s, u"&#240;"_s}, // latin small letter eth, U+00F0 ISOlat1
{u"ntilde"_s, u"&#241;"_s}, // latin small letter n with tilde, U+00F1 ISOlat1
{u"ograve"_s, u"&#242;"_s}, // latin small letter o with grave, U+00F2 ISOlat1
{u"oacute"_s, u"&#243;"_s}, // latin small letter o with acute, U+00F3 ISOlat1
{u"ocirc"_s, u"&#244;"_s}, // latin small letter o with circumflex, U+00F4 ISOlat1
{u"otilde"_s, u"&#245;"_s}, // latin small letter o with tilde, U+00F5 ISOlat1
{u"ouml"_s, u"&#246;"_s}, // latin small letter o with diaeresis, U+00F6 ISOlat1
{u"divide"_s, u"&#247;"_s}, // division sign, U+00F7 ISOnum
{u"oslash"_s, u"&#248;"_s}, // latin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1
{u"ugrave"_s, u"&#249;"_s}, // latin small letter u with grave, U+00F9 ISOlat1
{u"uacute"_s, u"&#250;"_s}, // latin small letter u with acute, U+00FA ISOlat1
{u"ucirc"_s, u"&#251;"_s}, // latin small letter u with circumflex, U+00FB ISOlat1
{u"uuml"_s, u"&#252;"_s}, // latin small letter u with diaeresis, U+00FC ISOlat1
{u"yacute"_s, u"&#253;"_s}, // latin small letter y with acute, U+00FD ISOlat1
{u"thorn"_s, u"&#254;"_s}, // latin small letter thorn, U+00FE ISOlat1
{u"yuml"_s, u"&#255;"_s}, // latin small letter y with diaeresis, U+00FF ISOlat1
// Latin Extended-A
{u"OElig"_s, u"&#338;"_s}, // latin capital ligature OE, U+0152 ISOlat2
{u"oelig"_s, u"&#339;"_s}, // latin small ligature oe, U+0153 ISOlat2
// ligature is a misnomer, this is a separate character in some languages
{u"Scaron"_s, u"&#352;"_s}, // latin capital letter S with caron, U+0160 ISOlat2
{u"scaron"_s, u"&#353;"_s}, // latin small letter s with caron, U+0161 ISOlat2
{u"Yuml"_s, u"&#376;"_s}, // latin capital letter Y with diaeresis, U+0178 ISOlat2
// Spacing Modifier Letters
{u"circ"_s, u"&#710;"_s}, // modifier letter circumflex accent, U+02C6 ISOpub
{u"tilde"_s, u"&#732;"_s}, // small tilde, U+02DC ISOdia
// General Punctuation
{u"ensp"_s, u"&#8194;"_s}, // en space, U+2002 ISOpub
{u"emsp"_s, u"&#8195;"_s}, // em space, U+2003 ISOpub
{u"thinsp"_s, u"&#8201;"_s}, // thin space, U+2009 ISOpub
{u"zwnj"_s, u"&#8204;"_s}, // zero width non-joiner, U+200C NEW RFC 2070
{u"zwj"_s, u"&#8205;"_s}, // zero width joiner, U+200D NEW RFC 2070
{u"lrm"_s, u"&#8206;"_s}, // left-to-right mark, U+200E NEW RFC 2070
{u"rlm"_s, u"&#8207;"_s}, // right-to-left mark, U+200F NEW RFC 2070
{u"ndash"_s, u"&#8211;"_s}, // en dash, U+2013 ISOpub
{u"mdash"_s, u"&#8212;"_s}, // em dash, U+2014 ISOpub
{u"lsquo"_s, u"&#8216;"_s}, // left single quotation mark, U+2018 ISOnum
{u"rsquo"_s, u"&#8217;"_s}, // right single quotation mark, U+2019 ISOnum
{u"sbquo"_s, u"&#8218;"_s}, // single low-9 quotation mark, U+201A NEW
{u"ldquo"_s, u"&#8220;"_s}, // left double quotation mark, U+201C ISOnum
{u"rdquo"_s, u"&#8221;"_s}, // right double quotation mark, U+201D ISOnum
{u"bdquo"_s, u"&#8222;"_s}, // double low-9 quotation mark, U+201E NEW
{u"dagger"_s, u"&#8224;"_s}, // dagger, U+2020 ISOpub
{u"Dagger"_s, u"&#8225;"_s}, // double dagger, U+2021 ISOpub
{u"permil"_s, u"&#8240;"_s}, // per mille sign, U+2030 ISOtech
{u"lsaquo"_s, u"&#8249;"_s}, // single left-pointing angle quotation mark, U+2039 ISO proposed
// lsaquo is proposed but not yet ISO standardized
{u"rsaquo"_s, u"&#8250;"_s}, // single right-pointing angle quotation mark, U+203A ISO proposed
// rsaquo is proposed but not yet ISO standardized
// Currency Symbols
{u"euro"_s, u"&#8364;"_s}, // euro sign, U+20AC NEW
// Latin Extended-B
{u"fnof"_s, u"&#402;"_s}, // latin small letter f with hook = function = florin, U+0192 ISOtech
// Greek
{u"Alpha"_s, u"&#913;"_s}, // greek capital letter alpha, U+0391
{u"Beta"_s, u"&#914;"_s}, // greek capital letter beta, U+0392
{u"Gamma"_s, u"&#915;"_s}, // greek capital letter gamma, U+0393 ISOgrk3
{u"Delta"_s, u"&#916;"_s}, // greek capital letter delta, U+0394 ISOgrk3
{u"Epsilon"_s, u"&#917;"_s}, // greek capital letter epsilon, U+0395
{u"Zeta"_s, u"&#918;"_s}, // greek capital letter zeta, U+0396
{u"Eta"_s, u"&#919;"_s}, // greek capital letter eta, U+0397
{u"Theta"_s, u"&#920;"_s}, // greek capital letter theta, U+0398 ISOgrk3
{u"Iota"_s, u"&#921;"_s}, // greek capital letter iota, U+0399
{u"Kappa"_s, u"&#922;"_s}, // greek capital letter kappa, U+039A
{u"Lambda"_s, u"&#923;"_s}, // greek capital letter lambda, U+039B ISOgrk3
{u"Mu"_s, u"&#924;"_s}, // greek capital letter mu, U+039C
{u"Nu"_s, u"&#925;"_s}, // greek capital letter nu, U+039D
{u"Xi"_s, u"&#926;"_s}, // greek capital letter xi, U+039E ISOgrk3
{u"Omicron"_s, u"&#927;"_s}, // greek capital letter omicron, U+039F
{u"Pi"_s, u"&#928;"_s}, // greek capital letter pi, U+03A0 ISOgrk3
{u"Rho"_s, u"&#929;"_s}, // greek capital letter rho, U+03A1
{u"Sigma"_s, u"&#931;"_s}, // greek capital letter sigma, U+03A3 ISOgrk3
{u"Tau"_s, u"&#932;"_s}, // greek capital letter tau, U+03A4
{u"Upsilon"_s, u"&#933;"_s}, // greek capital letter upsilon, U+03A5 ISOgrk3
{u"Phi"_s, u"&#934;"_s}, // greek capital letter phi, U+03A6 ISOgrk3
{u"Chi"_s, u"&#935;"_s}, // greek capital letter chi, U+03A7
{u"Psi"_s, u"&#936;"_s}, // greek capital letter psi, U+03A8 ISOgrk3
{u"Omega"_s, u"&#937;"_s}, // greek capital letter omega, U+03A9 ISOgrk3
{u"alpha"_s, u"&#945;"_s}, // greek small letter alpha, U+03B1 ISOgrk3
{u"beta"_s, u"&#946;"_s}, // greek small letter beta, U+03B2 ISOgrk3
{u"gamma"_s, u"&#947;"_s}, // greek small letter gamma, U+03B3 ISOgrk3
{u"delta"_s, u"&#948;"_s}, // greek small letter delta, U+03B4 ISOgrk3
{u"epsilon"_s, u"&#949;"_s}, // greek small letter epsilon, U+03B5 ISOgrk3
{u"zeta"_s, u"&#950;"_s}, // greek small letter zeta, U+03B6 ISOgrk3
{u"eta"_s, u"&#951;"_s}, // greek small letter eta, U+03B7 ISOgrk3
{u"theta"_s, u"&#952;"_s}, // greek small letter theta, U+03B8 ISOgrk3
{u"iota"_s, u"&#953;"_s}, // greek small letter iota, U+03B9 ISOgrk3
{u"kappa"_s, u"&#954;"_s}, // greek small letter kappa, U+03BA ISOgrk3
{u"lambda"_s, u"&#955;"_s}, // greek small letter lambda, U+03BB ISOgrk3
{u"mu"_s, u"&#956;"_s}, // greek small letter mu, U+03BC ISOgrk3
{u"nu"_s, u"&#957;"_s}, // greek small letter nu, U+03BD ISOgrk3
{u"xi"_s, u"&#958;"_s}, // greek small letter xi, U+03BE ISOgrk3
{u"omicron"_s, u"&#959;"_s}, // greek small letter omicron, U+03BF NEW
{u"pi"_s, u"&#960;"_s}, // greek small letter pi, U+03C0 ISOgrk3
{u"rho"_s, u"&#961;"_s}, // greek small letter rho, U+03C1 ISOgrk3
{u"sigmaf"_s, u"&#962;"_s}, // greek small letter final sigma, U+03C2 ISOgrk3
{u"sigma"_s, u"&#963;"_s}, // greek small letter sigma, U+03C3 ISOgrk3
{u"tau"_s, u"&#964;"_s}, // greek small letter tau, U+03C4 ISOgrk3
{u"upsilon"_s, u"&#965;"_s}, // greek small letter upsilon, U+03C5 ISOgrk3
{u"phi"_s, u"&#966;"_s}, // greek small letter phi, U+03C6 ISOgrk3
{u"chi"_s, u"&#967;"_s}, // greek small letter chi, U+03C7 ISOgrk3
{u"psi"_s, u"&#968;"_s}, // greek small letter psi, U+03C8 ISOgrk3
{u"omega"_s, u"&#969;"_s}, // greek small letter omega, U+03C9 ISOgrk3
{u"thetasym"_s, u"&#977;"_s}, // greek theta symbol, U+03D1 NEW
{u"upsih"_s, u"&#978;"_s}, // greek upsilon with hook symbol, U+03D2 NEW
{u"piv"_s, u"&#982;"_s}, // greek pi symbol, U+03D6 ISOgrk3
// General Punctuation
{u"bull"_s, u"&#8226;"_s}, // bullet = black small circle, U+2022 ISOpub
// bullet is NOT the same as bullet operator, U+2219
{u"hellip"_s, u"&#8230;"_s}, // horizontal ellipsis = three dot leader, U+2026 ISOpub
{u"prime"_s, u"&#8242;"_s}, // prime = minutes = feet, U+2032 ISOtech
{u"Prime"_s, u"&#8243;"_s}, // double prime = seconds = inches, U+2033 ISOtech
{u"oline"_s, u"&#8254;"_s}, // overline = spacing overscore, U+203E NEW
{u"frasl"_s, u"&#8260;"_s}, // fraction slash, U+2044 NEW
// Letterlike Symbols
{u"weierp"_s, u"&#8472;"_s}, // script capital P = power set = Weierstrass p, U+2118 ISOamso
{u"image"_s, u"&#8465;"_s}, // black-letter capital I = imaginary part, U+2111 ISOamso
{u"real"_s, u"&#8476;"_s}, // black-letter capital R = real part symbol, U+211C ISOamso
{u"trade"_s, u"&#8482;"_s}, // trade mark sign, U+2122 ISOnum
{u"alefsym"_s, u"&#8501;"_s}, // alef symbol = first transfinite cardinal, U+2135 NEW
// alef symbol is NOT the same as hebrew letter alef,
// U+05D0 although the same glyph could be used to depict both characters
// Arrows
{u"larr"_s, u"&#8592;"_s}, // leftwards arrow, U+2190 ISOnum
{u"uarr"_s, u"&#8593;"_s}, // upwards arrow, U+2191 ISOnum
{u"rarr"_s, u"&#8594;"_s}, // rightwards arrow, U+2192 ISOnum
{u"darr"_s, u"&#8595;"_s}, // downwards arrow, U+2193 ISOnum
{u"harr"_s, u"&#8596;"_s}, // left right arrow, U+2194 ISOamsa
{u"crarr"_s, u"&#8629;"_s}, // downwards arrow with corner leftwards = carriage return, U+21B5 NEW
{u"lArr"_s, u"&#8656;"_s}, // leftwards double arrow, U+21D0 ISOtech
// Unicode does not say that lArr is the same as the 'is implied by' arrow
// but also does not have any other character for that function. So lArr can
// be used for 'is implied by' as ISOtech suggests
{u"uArr"_s, u"&#8657;"_s}, // upwards double arrow, U+21D1 ISOamsa
{u"rArr"_s, u"&#8658;"_s}, // rightwards double arrow, U+21D2 ISOtech
// Unicode does not say this is the 'implies' character but does not have
// another character with this function so rArr can be used for 'implies'
// as ISOtech suggests
{u"dArr"_s, u"&#8659;"_s}, // downwards double arrow, U+21D3 ISOamsa
{u"hArr"_s, u"&#8660;"_s}, // left right double arrow, U+21D4 ISOamsa
// Mathematical Operators
{u"forall"_s, u"&#8704;"_s}, // for all, U+2200 ISOtech
{u"part"_s, u"&#8706;"_s}, // partial differential, U+2202 ISOtech
{u"exist"_s, u"&#8707;"_s}, // there exists, U+2203 ISOtech
{u"empty"_s, u"&#8709;"_s}, // empty set = null set, U+2205 ISOamso
{u"nabla"_s, u"&#8711;"_s}, // nabla = backward difference, U+2207 ISOtech
{u"isin"_s, u"&#8712;"_s}, // element of, U+2208 ISOtech
{u"notin"_s, u"&#8713;"_s}, // not an element of, U+2209 ISOtech
{u"ni"_s, u"&#8715;"_s}, // contains as member, U+220B ISOtech
{u"prod"_s, u"&#8719;"_s}, // n-ary product = product sign, U+220F ISOamsb
// prod is NOT the same character as U+03A0 'greek capital letter pi' though
// the same glyph might be used for both
{u"sum"_s, u"&#8721;"_s}, // n-ary summation, U+2211 ISOamsb
// sum is NOT the same character as U+03A3 'greek capital letter sigma'
// though the same glyph might be used for both
{u"minus"_s, u"&#8722;"_s}, // minus sign, U+2212 ISOtech
{u"lowast"_s, u"&#8727;"_s}, // asterisk operator, U+2217 ISOtech
{u"radic"_s, u"&#8730;"_s}, // square root = radical sign, U+221A ISOtech
{u"prop"_s, u"&#8733;"_s}, // proportional to, U+221D ISOtech
{u"infin"_s, u"&#8734;"_s}, // infinity, U+221E ISOtech
{u"ang"_s, u"&#8736;"_s}, // angle, U+2220 ISOamso
{u"and"_s, u"&#8743;"_s}, // logical and = wedge, U+2227 ISOtech
{u"or"_s, u"&#8744;"_s}, // logical or = vee, U+2228 ISOtech
{u"cap"_s, u"&#8745;"_s}, // intersection = cap, U+2229 ISOtech
{u"cup"_s, u"&#8746;"_s}, // union = cup, U+222A ISOtech
{u"int"_s, u"&#8747;"_s}, // integral, U+222B ISOtech
{u"there4"_s, u"&#8756;"_s}, // therefore, U+2234 ISOtech
{u"sim"_s, u"&#8764;"_s}, // tilde operator = varies with = similar to, U+223C ISOtech
// tilde operator is NOT the same character as the tilde, U+007E,
// although the same glyph might be used to represent both
{u"cong"_s, u"&#8773;"_s}, // approximately equal to, U+2245 ISOtech
{u"asymp"_s, u"&#8776;"_s}, // almost equal to = asymptotic to, U+2248 ISOamsr
{u"ne"_s, u"&#8800;"_s}, // not equal to, U+2260 ISOtech
{u"equiv"_s, u"&#8801;"_s}, // identical to, U+2261 ISOtech
{u"le"_s, u"&#8804;"_s}, // less-than or equal to, U+2264 ISOtech
{u"ge"_s, u"&#8805;"_s}, // greater-than or equal to, U+2265 ISOtech
{u"sub"_s, u"&#8834;"_s}, // subset of, U+2282 ISOtech
{u"sup"_s, u"&#8835;"_s}, // superset of, U+2283 ISOtech
{u"nsub"_s, u"&#8836;"_s}, // not a subset of, U+2284 ISOamsn
{u"sube"_s, u"&#8838;"_s}, // subset of or equal to, U+2286 ISOtech
{u"supe"_s, u"&#8839;"_s}, // superset of or equal to, U+2287 ISOtech
{u"oplus"_s, u"&#8853;"_s}, // circled plus = direct sum, U+2295 ISOamsb
{u"otimes"_s, u"&#8855;"_s}, // circled times = vector product, U+2297 ISOamsb
{u"perp"_s, u"&#8869;"_s}, // up tack = orthogonal to = perpendicular, U+22A5 ISOtech
{u"sdot"_s, u"&#8901;"_s}, // dot operator, U+22C5 ISOamsb
// dot operator is NOT the same character as U+00B7 middle dot
// Miscellaneous Technical
{u"lceil"_s, u"&#8968;"_s}, // left ceiling = APL upstile, U+2308 ISOamsc
{u"rceil"_s, u"&#8969;"_s}, // right ceiling, U+2309 ISOamsc
{u"lfloor"_s, u"&#8970;"_s}, // left floor = APL downstile, U+230A ISOamsc
{u"rfloor"_s, u"&#8971;"_s}, // right floor, U+230B ISOamsc
{u"lang"_s, u"&#9001;"_s}, // left-pointing angle bracket = bra, U+2329 ISOtech
// lang is NOT the same character as U+003C 'less than sign'
// or U+2039 'single left-pointing angle quotation mark'
{u"rang"_s, u"&#9002;"_s}, // right-pointing angle bracket = ket, U+232A ISOtech
// rang is NOT the same character as U+003E 'greater than sign'
// or U+203A 'single right-pointing angle quotation mark'
// Geometric Shapes
{u"loz"_s, u"&#9674;"_s}, // lozenge, U+25CA ISOpub
// Miscellaneous Symbols
{u"spades"_s, u"&#9824;"_s}, // black spade suit, U+2660 ISOpub
{u"clubs"_s, u"&#9827;"_s}, // black club suit = shamrock, U+2663 ISOpub
{u"hearts"_s, u"&#9829;"_s}, // black heart suit = valentine, U+2665 ISOpub
{u"diams"_s, u"&#9830;"_s} // black diamond suit, U+2666 ISOpub
};
return HTMLEntities.value(name);
}
};
// Ported to Qt from KDElibs4
QDateTime parseDate(const QString &string)
{
const char16_t shortDay[][4] =
{
u"Mon", u"Tue", u"Wed",
u"Thu", u"Fri", u"Sat",
u"Sun"
};
const char16_t longDay[][10] =
{
u"Monday", u"Tuesday", u"Wednesday",
u"Thursday", u"Friday", u"Saturday",
u"Sunday"
};
const char16_t shortMonth[][4] =
{
u"Jan", u"Feb", u"Mar", u"Apr",
u"May", u"Jun", u"Jul", u"Aug",
u"Sep", u"Oct", u"Nov", u"Dec"
};
const QString str = string.trimmed();
if (str.isEmpty())
return QDateTime::currentDateTime();
int nyear = 6; // indexes within string to values
int nmonth = 4;
int nday = 2;
int nwday = 1;
int nhour = 7;
int nmin = 8;
int nsec = 9;
// Also accept obsolete form "Weekday, DD-Mon-YY HH:MM:SS ±hhmm"
QRegularExpression rx {u"^(?:([A-Z][a-z]+),\\s*)?(\\d{1,2})(\\s+|-)([^-\\s]+)(\\s+|-)(\\d{2,4})\\s+(\\d\\d):(\\d\\d)(?::(\\d\\d))?\\s+(\\S+)$"_s};
QRegularExpressionMatch rxMatch;
QStringList parts;
if (str.indexOf(rx, 0, &rxMatch) == 0)
{
// Check that if date has '-' separators, both separators are '-'.
parts = rxMatch.capturedTexts();
const bool h1 = (parts[3] == u"-");
const bool h2 = (parts[5] == u"-");
if (h1 != h2)
return QDateTime::currentDateTime();
}
else
{
// Check for the obsolete form "Wdy Mon DD HH:MM:SS YYYY"
rx = QRegularExpression {u"^([A-Z][a-z]+)\\s+(\\S+)\\s+(\\d\\d)\\s+(\\d\\d):(\\d\\d):(\\d\\d)\\s+(\\d\\d\\d\\d)$"_s};
if (str.indexOf(rx, 0, &rxMatch) != 0)
return QDateTime::currentDateTime();
nyear = 7;
nmonth = 2;
nday = 3;
nwday = 1;
nhour = 4;
nmin = 5;
nsec = 6;
parts = rxMatch.capturedTexts();
}
bool ok[4];
const int day = parts[nday].toInt(&ok[0]);
int year = parts[nyear].toInt(&ok[1]);
const int hour = parts[nhour].toInt(&ok[2]);
const int minute = parts[nmin].toInt(&ok[3]);
if (!ok[0] || !ok[1] || !ok[2] || !ok[3])
return QDateTime::currentDateTime();
int second = 0;
if (!parts[nsec].isEmpty())
{
second = parts[nsec].toInt(&ok[0]);
if (!ok[0])
return QDateTime::currentDateTime();
}
const bool leapSecond = (second == 60);
if (leapSecond)
second = 59; // apparently a leap second - validate below, once time zone is known
int month = 0;
for ( ; (month < 12) && (parts[nmonth] != shortMonth[month]); ++month);
int dayOfWeek = -1;
if (!parts[nwday].isEmpty())
{
// Look up the weekday name
while ((++dayOfWeek < 7) && (shortDay[dayOfWeek] != parts[nwday]));
if (dayOfWeek >= 7)
for (dayOfWeek = 0; (dayOfWeek < 7) && (longDay[dayOfWeek] != parts[nwday]); ++dayOfWeek);
}
// if (month >= 12 || dayOfWeek >= 7
// || (dayOfWeek < 0 && format == RFCDateDay))
// return QDateTime;
const int i = parts[nyear].size();
if (i < 4)
{
// It's an obsolete year specification with less than 4 digits
year += ((i == 2) && (year < 50)) ? 2000 : 1900;
}
// Parse the UTC offset part
int offset = 0; // set default to '-0000'
bool negOffset = false;
if (parts.count() > 10)
{
rx = QRegularExpression {u"^([+-])(\\d\\d)(\\d\\d)$"_s};
if (parts[10].indexOf(rx, 0, &rxMatch) == 0)
{
// It's a UTC offset ±hhmm
parts = rxMatch.capturedTexts();
offset = parts[2].toInt(&ok[0]) * 3600;
const int offsetMin = parts[3].toInt(&ok[1]);
if (!ok[0] || !ok[1] || offsetMin > 59)
return {};
offset += offsetMin * 60;
negOffset = (parts[1] == u"-");
if (negOffset)
offset = -offset;
}
else
{
// Check for an obsolete time zone name
const QByteArray zone = parts[10].toLatin1();
if ((zone.length() == 1) && (isalpha(zone[0])) && (toupper(zone[0]) != 'J'))
{
negOffset = true; // military zone: RFC 2822 treats as '-0000'
}
else if ((zone != "UT") && (zone != "GMT"))
{ // treated as '+0000'
offset = (zone == "EDT")
? -4 * 3600
: ((zone == "EST") || (zone == "CDT"))
? -5 * 3600
: ((zone == "CST") || (zone == "MDT"))
? -6 * 3600
: ((zone == "MST") || (zone == "PDT"))
? -7 * 3600
: (zone == "PST")
? -8 * 3600
: 0;
if (!offset)
{
// Check for any other alphabetic time zone
bool nonalpha = false;
for (int i = 0, end = zone.size(); (i < end) && !nonalpha; ++i)
nonalpha = !isalpha(zone[i]);
if (nonalpha)
return {};
// TODO: Attempt to recognize the time zone abbreviation?
negOffset = true; // unknown time zone: RFC 2822 treats as '-0000'
}
}
}
}
const QDate qDate(year, month + 1, day); // convert date, and check for out-of-range
if (!qDate.isValid())
return QDateTime::currentDateTime();
const QTime qTime(hour, minute, second);
QDateTime result(qDate, qTime, Qt::UTC);
if (offset)
result = result.addSecs(-offset);
if (!result.isValid())
return QDateTime::currentDateTime(); // invalid date/time
if (leapSecond)
{
// Validate a leap second time. Leap seconds are inserted after 23:59:59 UTC.
// Convert the time to UTC and check that it is 00:00:00.
if ((hour*3600 + minute*60 + 60 - offset + 86400*5) % 86400) // (max abs(offset) is 100 hours)
return QDateTime::currentDateTime(); // the time isn't the last second of the day
}
return result;
}
}
const int PARSINGRESULT_TYPEID = qRegisterMetaType<RSS::Private::ParsingResult>();
RSS::Private::Parser::Parser(const QString &lastBuildDate)
{
m_result.lastBuildDate = lastBuildDate;
}
// read and create items from a rss document
void RSS::Private::Parser::parse(const QByteArray &feedData)
{
QXmlStreamReader xml {feedData};
XmlStreamEntityResolver resolver;
xml.setEntityResolver(&resolver);
bool foundChannel = false;
while (xml.readNextStartElement())
{
if (xml.name() == u"rss")
{
// Find channels
while (xml.readNextStartElement())
{
if (xml.name() == u"channel")
{
parseRSSChannel(xml);
foundChannel = true;
break;
}
qDebug() << "Skip rss item: " << xml.name();
xml.skipCurrentElement();
}
break;
}
if (xml.name() == u"feed")
{ // Atom feed
parseAtomChannel(xml);
foundChannel = true;
break;
}
qDebug() << "Skip root item: " << xml.name();
xml.skipCurrentElement();
}
if (xml.hasError())
{
m_result.error = tr("%1 (line: %2, column: %3, offset: %4).")
.arg(xml.errorString()).arg(xml.lineNumber())
.arg(xml.columnNumber()).arg(xml.characterOffset());
}
else if (!foundChannel)
{
m_result.error = tr("Invalid RSS feed.");
}
emit finished(m_result);
m_result.articles.clear();
m_result.error.clear();
m_articleIDs.clear();
}
void RSS::Private::Parser::parseRssArticle(QXmlStreamReader &xml)
{
QVariantHash article;
QString altTorrentUrl;
while (!xml.atEnd())
{
xml.readNext();
const QString name(xml.name().toString());
if (xml.isEndElement() && (name == u"item"))
break;
if (xml.isStartElement())
{
if (name == u"title")
{
article[Article::KeyTitle] = xml.readElementText().trimmed();
}
else if (name == u"enclosure")
{
if (xml.attributes().value(u"type"_s) == u"application/x-bittorrent")
article[Article::KeyTorrentURL] = xml.attributes().value(u"url"_s).toString();
else if (xml.attributes().value(u"type"_s).isEmpty())
altTorrentUrl = xml.attributes().value(u"url"_s).toString();
}
else if (name == u"link")
{
const QString text {xml.readElementText().trimmed()};
if (text.startsWith(u"magnet:", Qt::CaseInsensitive))
article[Article::KeyTorrentURL] = text; // magnet link instead of a news URL
else
article[Article::KeyLink] = text;
}
else if (name == u"description")
{
article[Article::KeyDescription] = xml.readElementText(QXmlStreamReader::IncludeChildElements);
}
else if (name == u"pubDate")
{
article[Article::KeyDate] = parseDate(xml.readElementText().trimmed());
}
else if (name == u"author")
{
article[Article::KeyAuthor] = xml.readElementText().trimmed();
}
else if (name == u"guid")
{
article[Article::KeyId] = xml.readElementText().trimmed();
}
else
{
article[name] = xml.readElementText(QXmlStreamReader::IncludeChildElements);
}
}
}
if (article[Article::KeyTorrentURL].toString().isEmpty())
article[Article::KeyTorrentURL] = altTorrentUrl;
addArticle(article);
}
void RSS::Private::Parser::parseRSSChannel(QXmlStreamReader &xml)
{
while (!xml.atEnd())
{
xml.readNext();
if (xml.isStartElement())
{
if (xml.name() == u"title")
{
m_result.title = xml.readElementText();
}
else if (xml.name() == u"lastBuildDate")
{
const QString lastBuildDate = xml.readElementText();
if (!lastBuildDate.isEmpty())
{
if (m_result.lastBuildDate == lastBuildDate)
{
qDebug() << "The RSS feed has not changed since last time, aborting parsing.";
return;
}
m_result.lastBuildDate = lastBuildDate;
}
}
else if (xml.name() == u"item")
{
parseRssArticle(xml);
}
}
}
}
void RSS::Private::Parser::parseAtomArticle(QXmlStreamReader &xml)
{
QVariantHash article;
bool doubleContent = false;
while (!xml.atEnd())
{
xml.readNext();
const QString name(xml.name().toString());
if (xml.isEndElement() && (name == u"entry"))
break;
if (xml.isStartElement())
{
if (name == u"title")
{
article[Article::KeyTitle] = xml.readElementText().trimmed();
}
else if (name == u"link")
{
const QString link = (xml.attributes().isEmpty()
? xml.readElementText().trimmed()
: xml.attributes().value(u"href"_s).toString());
if (link.startsWith(u"magnet:", Qt::CaseInsensitive))
{
article[Article::KeyTorrentURL] = link; // magnet link instead of a news URL
}
else
{
// Atom feeds can have relative links, work around this and
// take the stress of figuring article full URI from UI
// Assemble full URI
article[Article::KeyLink] = (m_baseUrl.isEmpty() ? link : m_baseUrl + link);
}
}
else if ((name == u"summary") || (name == u"content"))
{
if (doubleContent)
{ // Duplicate content -> ignore
xml.skipCurrentElement();
continue;
}
// Try to also parse broken articles, which don't use html '&' escapes
// Actually works great for non-broken content too
const QString feedText = xml.readElementText(QXmlStreamReader::IncludeChildElements).trimmed();
if (!feedText.isEmpty())
{
article[Article::KeyDescription] = feedText;
doubleContent = true;
}
}
else if (name == u"updated")
{
// ATOM uses standard compliant date, don't do fancy stuff
const QDateTime articleDate = QDateTime::fromString(xml.readElementText().trimmed(), Qt::ISODate);
article[Article::KeyDate] = (articleDate.isValid() ? articleDate : QDateTime::currentDateTime());
}
else if (name == u"author")
{
while (xml.readNextStartElement())
{
if (xml.name() == u"name")
article[Article::KeyAuthor] = xml.readElementText().trimmed();
else
xml.skipCurrentElement();
}
}
else if (name == u"id")
{
article[Article::KeyId] = xml.readElementText().trimmed();
}
else
{
article[name] = xml.readElementText(QXmlStreamReader::IncludeChildElements);
}
}
}
addArticle(article);
}
void RSS::Private::Parser::parseAtomChannel(QXmlStreamReader &xml)
{
m_baseUrl = xml.attributes().value(u"xml:base"_s).toString();
while (!xml.atEnd())
{
xml.readNext();
if (xml.isStartElement())
{
if (xml.name() == u"title")
{
m_result.title = xml.readElementText();
}
else if (xml.name() == u"updated")
{
const QString lastBuildDate = xml.readElementText();
if (!lastBuildDate.isEmpty())
{
if (m_result.lastBuildDate == lastBuildDate)
{
qDebug() << "The RSS feed has not changed since last time, aborting parsing.";
return;
}
m_result.lastBuildDate = lastBuildDate;
}
}
else if (xml.name() == u"entry")
{
parseAtomArticle(xml);
}
}
}
}
void RSS::Private::Parser::addArticle(QVariantHash article)
{
QVariant &torrentURL = article[Article::KeyTorrentURL];
if (torrentURL.toString().isEmpty())
torrentURL = article.value(Article::KeyLink);
// If item does not have an ID, fall back to some other identifier.
QVariant &localId = article[Article::KeyId];
if (localId.toString().isEmpty())
{
localId = article.value(Article::KeyTorrentURL);
if (localId.toString().isEmpty())
{
localId = article.value(Article::KeyTitle);
if (localId.toString().isEmpty())
{
// The article could not be uniquely identified
// since it has no appropriate data.
// Just ignore it.
return;
}
}
}
if (m_articleIDs.contains(localId.toString()))
{
// The article could not be uniquely identified
// since the Feed has duplicate identifiers.
// Just ignore it.
return;
}
m_articleIDs.insert(localId.toString());
m_result.articles.prepend(article);
}