mirror of
https://github.com/UglyToad/PdfPig.git
synced 2026-03-10 00:23:29 +08:00
525 lines
18 KiB
C#
525 lines
18 KiB
C#
namespace UglyToad.PdfPig.Tests.Tokenization.Scanner
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{
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using PdfPig.Core;
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using PdfPig.Encryption;
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using PdfPig.Tokenization.Scanner;
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using PdfPig.Tokens;
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using Xunit;
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public class PdfTokenScannerTests
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{
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[Fact]
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public void ReadsSimpleObject()
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{
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const string s = @"294 0 obj
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/WDKAAR+CMBX12
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endobj";
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var pdfScanner = GetScanner(s);
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pdfScanner.MoveNext();
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var objectToken = Assert.IsType<ObjectToken>(pdfScanner.CurrentToken);
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var name = Assert.IsType<NameToken>(objectToken.Data);
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Assert.Equal(294, objectToken.Number.ObjectNumber);
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Assert.Equal(0, objectToken.Number.Generation);
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Assert.Equal("WDKAAR+CMBX12", name.Data);
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Assert.StartsWith("294 0 obj", s.Substring((int)objectToken.Position));
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}
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[Fact]
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public void ReadsIndirectReferenceInObject()
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{
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const string s = @"
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15 0 obj
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12 7 R
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endobj";
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var scanner = GetScanner(s);
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var token = ReadToEnd(scanner)[0];
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var reference = Assert.IsType<IndirectReferenceToken>(token.Data);
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Assert.Equal(new IndirectReference(12, 7), reference.Data);
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}
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[Fact]
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public void ReadsObjectWithUndefinedIndirectReference()
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{
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const string s = @"
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5 0 obj
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<<
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/XObject <<
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/Pic1 7 0 R
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>>
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/ProcSet [/PDF /Text /ImageC ]
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/Font <<
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/F0 8 0 R
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/F1 9 0 R
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/F2 10 0 R
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/F3 0 0 R
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>>
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>>
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endobj";
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var scanner = GetScanner(s);
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ReadToEnd(scanner);
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var token = scanner.Get(new IndirectReference(5, 0));
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Assert.NotNull(token);
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token = scanner.Get(new IndirectReference(0, 0));
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Assert.Null(token);
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}
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[Fact]
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public void ReadsNumericObjectWithComment()
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{
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const string s = @"%PDF-1.2
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% I commented here too, tee hee
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10383384 2 obj
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%and here, I just love comments
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45
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endobj
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%%EOF";
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var pdfScanner = GetScanner(s);
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pdfScanner.MoveNext();
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var obj = Assert.IsType<ObjectToken>(pdfScanner.CurrentToken);
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var num = Assert.IsType<NumericToken>(obj.Data);
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Assert.Equal(45, num.Int);
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Assert.Equal(10383384, obj.Number.ObjectNumber);
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Assert.Equal(2, obj.Number.Generation);
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Assert.StartsWith("10383384 2 obj", s.Substring((int)obj.Position));
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Assert.False(pdfScanner.MoveNext());
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}
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[Fact]
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public void ReadsArrayObject()
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{
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const string s = @"
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endobj
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295 0 obj
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[
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676 938 875 787 750 880 813 875 813 875 813 656 625 625 938 938 313
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344 563 563 563 563 563 850 500 574 813 875 563 1019 1144 875 313
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]
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endobj";
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var pdfScanner = GetScanner(s);
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pdfScanner.MoveNext();
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var obj = Assert.IsType<ObjectToken>(pdfScanner.CurrentToken);
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var array = Assert.IsType<ArrayToken>(obj.Data);
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Assert.Equal(676, ((NumericToken)array.Data[0]).Int);
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Assert.Equal(33, array.Data.Count);
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Assert.Equal(295, obj.Number.ObjectNumber);
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Assert.Equal(0, obj.Number.Generation);
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Assert.StartsWith("295 0 obj", s.Substring((int)obj.Position));
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Assert.False(pdfScanner.MoveNext());
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}
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[Fact]
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public void ReadsDictionaryObjectThenNameThenDictionary()
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{
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const string s = @"
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274 0 obj
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<<
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/Type /Pages
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/Count 2
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/Parent 275 0 R
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/Kids [ 121 0 R 125 0 R ]
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>>
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endobj
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%Other parts...
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310 0 obj
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/WPXNWT+CMR9
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endobj 311 0 obj
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<<
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/Type /Font
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/Subtype /Type1
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/FirstChar 0
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/LastChar 127
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/Widths 313 0 R
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/BaseFont 310 0 R /FontDescriptor 312 0 R
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>>
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endobj";
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var scanner = GetScanner(s);
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var tokens = ReadToEnd(scanner);
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var dictionary = Assert.IsType<DictionaryToken>(tokens[0].Data);
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Assert.Equal(4, dictionary.Data.Count);
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Assert.Equal(274, tokens[0].Number.ObjectNumber);
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Assert.StartsWith("274 0 obj", s.Substring((int)tokens[0].Position));
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var nameObject = Assert.IsType<NameToken>(tokens[1].Data);
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Assert.Equal("WPXNWT+CMR9", nameObject.Data);
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Assert.Equal(310, tokens[1].Number.ObjectNumber);
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Assert.StartsWith("310 0 obj", s.Substring((int)tokens[1].Position));
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dictionary = Assert.IsType<DictionaryToken>(tokens[2].Data);
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Assert.Equal(7, dictionary.Data.Count);
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Assert.Equal(311, tokens[2].Number.ObjectNumber);
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Assert.StartsWith("311 0 obj", s.Substring((int)tokens[2].Position));
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}
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[Fact]
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public void ReadsStringObject()
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{
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const string s = @"
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58949797283757 0 obj (An object begins with obj and ends with endobj...) endobj
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";
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var scanner = GetScanner(s);
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var token = ReadToEnd(scanner)[0];
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Assert.Equal(58949797283757L, token.Number.ObjectNumber);
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Assert.Equal("An object begins with obj and ends with endobj...", Assert.IsType<StringToken>(token.Data).Data);
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Assert.StartsWith("58949797283757 0 obj", s.Substring((int)token.Position));
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}
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[Fact]
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public void ReadsStreamObject()
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{
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const string s = @"
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352 0 obj
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<< /S 1273 /Filter /FlateDecode /Length 353 0 R >>
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stream
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H‰œUkLSgþÚ h¹IÝÅlK(%[ÈÅ©+ ƒåê©Šèæ ÇtnZ)Z¹¨Oå~9ŠÊµo”[éiK)÷B¹´
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ɲ ©¸˜ n±º×dKöcÏ÷ãœç{ßï}¾÷ÍÉs Ô;€
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À»—ÀF`ÇF@ƒ 4 ˜ï @¥T¨³fY: ž w̵;’’Îq®]cƒÿdp¨ÛI3F#G©#œ)TÇqW£NÚѬgOKbü‡µ#á¡£Þaîtƒƒ›ß–
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¾“S>}µuÕõ5M±¢ª†»øÞû•q÷îÜ~¬PòžÞ~•¬ëɃGÅ-Ñím·°g êêb,/,£P§õ^ v¾ãÁô ¿¿ ŠTE]²±{šuwÔ`LG³DªìTÈ
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A¡¬àð‰É©ˆ°‘¼›‚%¥×s³®í»š}%§X{{tøNåÝž¶ö¢ÖÞ¾–~´¼¬°À“Éððr¥8»P£ØêÁi½®Û(éhŽ‘ú;x#dÃÄ$m
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+)
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)† …±n
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9ùyŽA·n\ï»t!=3£½¡:®µåâ¹Ô³ø¼ËiûSÎsë;•Dt—ö$WÉ4U‘¢ºÚšñá1íÐèÔó‚svõ(/(+D²#mZÏ6êüÝ7x‡—†”‡E„²‚|ê«êªDµ5q°šR¦RÈ£ n¾[è~“}ýƒÝ½SꞦ'æQŽzÝ‚mæ
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ó F+Õ%ù‡ƒß9SˆŒÓãšH¶~L-#T]êîÁ©ÎkbjÒp½¸$¤´(4<,""øfvΕ< VЫ#4'2l'Ð1ñðn?sìûãI'OŸøñçŸN5(äÊ'âÎѾÞþ íðƒQmu}]Õ£‡c›©.Œòµ9zz0Ѳ‚B¢«#š-3ªà<cš¥’¡È¨qµ¦{pìۄÇŽŠ/íO»|áIclSCuo_Oœ \\ï!ª©«ªƒTþ5Ó‹™Ü”óî_9|ýÍ7ø!Ñý|2Goÿ€Î¶Öö…<ðáƒGéGá½G´Ã.®TŠóî=_|þ™‡ƒééFwßà 0æîc_Ó릳|ý|¶®æ„…†G8Òüï€l…\¦RFº:‰ VPð•S“Û¶ï V—ø/¿¾Xæ+«««ÖŽ4>ŸŸ¦Pà8®Ó…¼æ¢BaÅÐkëÊŠukÈÊÖL£ivvv…k2=µZMØ|Úl(ŠZV›ÍbI>Ÿl¹œ(â±Äbø”Uª ñeü©U*‹’“Oð, „E+¶Êà>ŽU”ÎÌõ çlºFÃ_ÃÙl?¶=>>!>þC ¿-×à©©©x¾€¢ ŠÊåòtÃ0‹Æôz“‰ NÊ,¬‚kÀ°F‚XÛ4&“ÉfÃñÅæûæy=ÆãIðE _¾Èårår /XÞ„/·qò›m¶ìÖ|†óx8Wð¹hºÜÂÕalÎü’˜Ã0^Òòòü¼yÞ¶´´DX
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)¨ÇM8lüM…Oúý| 1Ïãk»:t <…ÂÚl¶e¾†” éKÜl6c¹¸É„› ”)‰'3¤œ\–™ËN–™ÿe^в y÷ ð¹f`3ëž´ ¸“$d:e†)!%2º dvË@½N¼ªŠ Ùná¹ ¼¿@ €Ã.èšs ì÷ûM€2(E4_ | FÑ.@v @÷¤ÃÅ0È Pž~,€:»H¤k¾ hT Œ € êÇV:Ô…©@@oH¯(3T‰{""C½SñŠœþtz3€•ƒ ñf.¬SÐøzWþ *$9gj=~Ì·QD E6o¥Ûi/Â`1ígGMq,;}Ž¼sÔ×®kDü˜J{e5‚²ìÉ~Y)}f A>:˜ù–""Yò ç¹=ù²yÛ¡¿i aœ‘ØϺþÇoäO ôkÆ)
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endstream
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endobj
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353 0 obj
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1479
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endobj";
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var locationProvider = new TestObjectLocationProvider();
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// Mark location of "353 0 obj"
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locationProvider.Offsets[new IndirectReference(353, 0)] = 1643;
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var scanner = GetScanner(s, locationProvider);
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var tokens = ReadToEnd(scanner);
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Assert.Equal(2, tokens.Count);
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var stream = Assert.IsType<StreamToken>(tokens[0].Data);
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var str = Encoding.UTF8.GetString(stream.Data.ToArray());
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Assert.StartsWith("H‰œUkLSgþÚ h¹IÝÅl", str);
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Assert.Equal(2, locationProvider.Offsets[new IndirectReference(352, 0)]);
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}
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[Fact]
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public void ReadsSimpleStreamObject()
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{
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// Length of the bytes as found by Encoding.UTF8.GetBytes is 45
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const string s = @"
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574387 0 obj
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<< /Length 45 >>
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stream
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À“Éððr¥8»P£ØêÁi½®Û(éhŽ‘ú
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endstream
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endobj";
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var scanner = GetScanner(s);
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var token = ReadToEnd(scanner)[0];
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var stream = Assert.IsType<StreamToken>(token.Data);
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var bytes = stream.Data.ToArray();
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Assert.Equal(45, bytes.Length);
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var outputString = Encoding.UTF8.GetString(bytes);
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Assert.Equal("À“Éððr¥8»P£ØêÁi½®Û(éhŽ‘ú", outputString);
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}
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[Fact]
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public void ReadsStreamWithIndirectLength()
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{
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const string s = @"5 0 obj 52 endobj
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12 0 obj
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<< /Length 5 0 R /S 1245 >>
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stream
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%¥×³®í»š}%§X{{tøNåÝž¶ö¢ÖÞ¾–~´¼
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endstream
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endobj";
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var locationProvider = new TestObjectLocationProvider();
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locationProvider.Offsets[new IndirectReference(5, 0)] = 0;
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var scanner = GetScanner(s, locationProvider);
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var token = ReadToEnd(scanner)[1];
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var stream = Assert.IsType<StreamToken>(token.Data);
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var bytes = stream.Data.ToArray();
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Assert.Equal(52, bytes.Length);
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var outputString = Encoding.UTF8.GetString(bytes);
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Assert.Equal("%¥×³®í»š}%§X{{tøNåÝž¶ö¢ÖÞ¾–~´¼", outputString);
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}
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[Fact]
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public void ReadsStreamWithMissingLength()
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{
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const string s = @"
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12655 0 obj
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<< /S 1245 >>
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stream
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%¥×³®í»š}%§X{{tøNåÝž¶ö¢ÖÞgrehtyyy$&%&£$££(*¾–~´¼
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endstream
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endobj";
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var scanner = GetScanner(s);
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var token = ReadToEnd(scanner)[0];
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Assert.Equal(12655, token.Number.ObjectNumber);
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var stream = Assert.IsType<StreamToken>(token.Data);
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Assert.Equal("1245", stream.StreamDictionary.Data["S"].ToString());
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Assert.Equal("%¥×³®í»š}%§X{{tøNåÝž¶ö¢ÖÞgrehtyyy$&%&£$££(*¾–~´¼", Encoding.UTF8.GetString(stream.Data.ToArray()));
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}
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[Fact]
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public void ReadsStreamWithoutBreakBeforeEndstream()
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{
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const string s = @"
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1 0 obj
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12
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endobj
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7 0 obj
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<< /Length 288
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/Filter /FlateDecode >>
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stream
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xœ]‘ËjÃ0E÷ÿÃ,ÓEð#NÒ€1¤N^ôA~€-]A- YYøï+Ï4¡t#qfî FWQY* Dïv5:è”–§ñjB‹½Òa¤ •p7¤K ƒÈûëyr8Tº!Ïà úð‚ÉÙVG9¶ø@Å7+Ñ*ÝÃ곬¹T_ùƵƒ8 Š$vË̗Ƽ6BDöu%½B¹yí$—Ù ¤\Hx71JœL#Ð6ºÇ0È㸀ü|. µüßõÏ""WÛ‰¯Æ.êÄ«ã8; ¤iL°!Ø %É`K°ßì¸ÃöÜáÜ) [‚#CFðÄ°#(yƒg^ÿ¶æò
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ÿž“¸Zë#¢?¢h–P”Æû?šÑï÷ø¯‰Šendstream
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endobj
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9 0 obj
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16
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endobj";
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var scanner = GetScanner(s);
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var token = ReadToEnd(scanner)[1];
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Assert.Equal(7, token.Number.ObjectNumber);
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}
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[Fact]
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public void ReadsStringsWithMissingEndBracket()
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{
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const string input = @"5 0 obj
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<<
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/Kids [4 0 R 12 0 R 17 0 R 20 0 R 25 0 R 28 0 R ]
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/Count 6
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/Type /Pages
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/MediaBox [ 0 0 612 792 ]
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>>
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endobj
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1 0 obj
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<<
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/Creator (Corel WordPerfect - [D:\Wpdocs\WEBSITE\PROC&POL.WP6 (unmodified)
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/CreationDate (D:19980224130723)
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/Title (Proc&Pol.pdf)
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/Author (J. L. Swezey)
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/Producer (Acrobat PDFWriter 3.03 for Windows NT)
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/Keywords (Budapest Treaty; Patent deposits; IDA)
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/Subject (Patent Collection Procedures and Policies)
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>>
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endobj
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3 0 obj
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<<
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/Pages 5 0 R
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/Type /Catalog
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>>
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endobj";
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var scanner = GetScanner(input);
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var tokens = ReadToEnd(scanner);
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Assert.Equal(3, tokens.Count);
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var first = tokens[0];
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Assert.Equal(5, first.Number.ObjectNumber);
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var second = tokens[1];
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Assert.Equal(1, second.Number.ObjectNumber);
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var third = tokens[2];
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Assert.Equal(3, third.Number.ObjectNumber);
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}
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[Fact]
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public void ReadsDictionaryContainingNull()
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{
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const string input = @"14224 0 obj
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<</Type /XRef
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/Root 8 0 R
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/Prev 116
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/Length 84
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/Size 35
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/W [1 3 2]
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/Index [0 1 6 1 8 2 25 10]
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/ID [ (ù¸7<C2B8>ãA×<41>žòÜ4<C39C><34>Š•)]
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/Info 6 0 R
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/Encrypt null>>
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endobj";
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var scanner = GetScanner(input);
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var tokens = ReadToEnd(scanner);
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var dictionaryToken = tokens[0].Data as DictionaryToken;
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Assert.NotNull(dictionaryToken);
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var encryptValue = dictionaryToken.Data["Encrypt"];
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Assert.IsType<NullToken>(encryptValue);
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}
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[Fact]
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public void ReadMultipleNestedDictionary()
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{
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const string input =
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@"
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4 0 obj
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<< /Type /Font /Subtype /Type1 /Name /AF1F040+Arial /BaseFont /Arial /FirstChar 32 /LastChar 255
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/Encoding
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<<
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/Type /Encoding /BaseEncoding /WinAnsiEncoding
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/Differences [128 /Euro 130 /quotesinglbase /florin /quotedblbase /ellipsis /dagger /daggerdbl /circumflex /perthousand /Scaron /guilsinglleft /OE 142 /Zcaron 145
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/quoteleft /quoteright /quotedblleft /quotedblright /bullet /endash /emdash /tilde /trademark /scaron /guilsinglright /oe 158 /zcaron /Ydieresis /space /exclamdown
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/cent /sterling /currency /yen /brokenbar /section /dieresis /copyright /ordfeminine /guillemotleft /logicalnot /hyphen /registered /macron /degree /plusminus
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/twosuperior /threesuperior /acute /mu /paragraph /periodcentered /cedilla /onesuperior /ordmasculine /guillemotright /onequarter /onehalf /threequarters
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/questiondown /Agrave /Aacute /Acircumflex /Atilde /Adieresis /Aring /AE /Ccedilla /Egrave /Eacute /Ecircumflex /Edieresis /Igrave /Iacute /Icircumflex /Idieresis
|
||
/Eth /Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply /Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn /germandbls /agrave /aacute
|
||
/acircumflex /atilde /adieresis /aring /ae /ccedilla /egrave /eacute /ecircumflex /edieresis /igrave /iacute /icircumflex /idieresis /eth /ntilde /ograve /oacute
|
||
/ocircumflex /otilde /odieresis /divide /oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn /ydieresis ]
|
||
>>
|
||
/Widths [278 278 355 556 556 889 667 191 333 333 389 584 278 333 278 278
|
||
556 556 556 556 556 556 556 556 556 556 278 278 584 584 584 556
|
||
1015 667 667 722 722 667 611 778 722 278 500 667 556 833 722 778
|
||
667 778 722 667 611 722 667 944 667 667 611 278 278 278 469 556
|
||
333 556 556 500 556 556 278 556 556 222 222 500 222 833 556 556
|
||
556 556 333 500 278 556 500 722 500 500 500 334 260 334 584 750
|
||
556 750 222 556 333 1000 556 556 333 1000 667 333 1000 750 611 750
|
||
750 222 222 333 333 350 556 1000 333 1000 500 333 944 750 500 667
|
||
278 333 556 556 556 556 260 556 333 737 370 556 584 333 737 552
|
||
400 549 333 333 333 576 537 278 333 333 365 556 834 834 834 611
|
||
667 667 667 667 667 667 1000 722 667 667 667 667 278 278 278 278
|
||
722 722 778 778 778 778 778 584 778 722 722 722 722 667 667 611
|
||
556 556 556 556 556 556 889 500 556 556 556 556 278 278 278 278
|
||
556 556 556 556 556 556 556 549 611 556 556 556 556 500 556 500
|
||
]
|
||
>>
|
||
>>
|
||
endobj
|
||
";
|
||
|
||
var scanner = GetScanner(input);
|
||
|
||
var tokens = ReadToEnd(scanner);
|
||
|
||
var dictionaryToken = tokens[0].Data as DictionaryToken;
|
||
|
||
Assert.NotNull(dictionaryToken);
|
||
}
|
||
|
||
private static PdfTokenScanner GetScanner(string s, TestObjectLocationProvider locationProvider = null)
|
||
{
|
||
var input = StringBytesTestConverter.Convert(s, false);
|
||
|
||
return new PdfTokenScanner(input.Bytes, locationProvider ?? new TestObjectLocationProvider(),
|
||
new TestFilterProvider(), NoOpEncryptionHandler.Instance);
|
||
}
|
||
|
||
private static IReadOnlyList<ObjectToken> ReadToEnd(PdfTokenScanner scanner)
|
||
{
|
||
var result = new List<ObjectToken>();
|
||
|
||
while (scanner.MoveNext())
|
||
{
|
||
if (scanner.CurrentToken is ObjectToken obj)
|
||
{
|
||
result.Add(obj);
|
||
}
|
||
else
|
||
{
|
||
throw new InvalidOperationException($"Pdf token scanner produced token which was not an object token: {scanner.CurrentToken}.");
|
||
}
|
||
}
|
||
|
||
return result;
|
||
}
|
||
}
|
||
}
|