forked from pocoproject/poco
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathDecompress.cpp
More file actions
187 lines (163 loc) · 4.74 KB
/
Decompress.cpp
File metadata and controls
187 lines (163 loc) · 4.74 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
//
// Decompress.cpp
//
// Library: Zip
// Package: Zip
// Module: Decompress
//
// Copyright (c) 2007, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Zip/Decompress.h"
#include "Poco/Zip/ZipLocalFileHeader.h"
#include "Poco/Zip/ZipArchive.h"
#include "Poco/Zip/ZipStream.h"
#include "Poco/Zip/ZipException.h"
#include "Poco/File.h"
#include "Poco/Exception.h"
#include "Poco/StreamCopier.h"
#include "Poco/Delegate.h"
#include "Poco/FileStream.h"
#include "Poco/Format.h"
namespace Poco {
namespace Zip {
Decompress::Decompress(std::istream& in, const Poco::Path& outputDir, bool flattenDirs, bool keepIncompleteFiles):
_in(in),
_outDir(outputDir),
_flattenDirs(flattenDirs),
_keepIncompleteFiles(keepIncompleteFiles),
_mapping()
{
_outDir.makeAbsolute();
_outDir.makeDirectory();
if (!_in.good()) throw Poco::IOException("Bad input stream");
Poco::File tmp(_outDir);
if (!tmp.exists())
{
tmp.createDirectories();
}
if (!tmp.isDirectory())
throw Poco::IOException("Failed to create/open directory: " + _outDir.toString());
EOk += Poco::Delegate<Decompress, std::pair<const ZipLocalFileHeader, const Poco::Path>>(this, &Decompress::onOk);
}
Decompress::~Decompress()
{
try
{
EOk -= Poco::Delegate<Decompress, std::pair<const ZipLocalFileHeader, const Poco::Path>>(this, &Decompress::onOk);
}
catch (...)
{
poco_unexpected();
}
}
ZipArchive Decompress::decompressAllFiles()
{
poco_assert (_mapping.empty());
ZipArchive arch(_in, *this);
return arch;
}
bool Decompress::handleZipEntry(std::istream& zipStream, const ZipLocalFileHeader& hdr)
{
if (hdr.isDirectory())
{
// directory have 0 size, nth to read
if (!_flattenDirs)
{
std::string dirName = hdr.getFileName();
if (!ZipCommon::isValidPath(dirName))
throw ZipException("Illegal entry name", dirName);
Poco::Path dir(_outDir, dirName);
dir.makeDirectory();
Poco::File aFile(dir);
aFile.createDirectories();
}
if (hdr.getCompressionMethod() == ZipCommon::CM_DEFLATE)
{
// If directory is stored with deflate method, two extra bytes
// (the result of deflating a zero-length sequence) must be read.
char buffer[2];
zipStream.read(buffer, 2);
}
return true;
}
try
{
std::string fileName = hdr.getFileName();
if (_flattenDirs)
{
// remove path info
Poco::Path p(fileName);
p.makeFile();
fileName = p.getFileName();
}
if (!ZipCommon::isValidPath(fileName))
{
throw ZipException("Illegal entry name", fileName);
}
if (!hdr.hasSupportedCompressionMethod())
{
throw ZipException(Poco::format("Unsupported compression method (%d)", static_cast<int>(hdr.getCompressionMethod())), fileName);
}
Poco::Path file(fileName);
file.makeFile();
Poco::Path dest(_outDir, file);
dest.makeFile();
if (dest.depth() > 0)
{
Poco::File aFile(dest.parent());
aFile.createDirectories();
}
Poco::FileOutputStream out(dest.toString());
ZipInputStream inp(zipStream, hdr, false);
Poco::StreamCopier::copyStream(inp, out);
out.close();
Poco::File aFile(dest.toString());
if (!aFile.exists() || !aFile.isFile())
{
std::pair<const ZipLocalFileHeader, const std::string> tmp = std::make_pair(hdr, "Failed to create output stream " + dest.toString());
EError.notify(this, tmp);
return false;
}
if (!inp.crcValid())
{
if (!_keepIncompleteFiles)
aFile.remove();
std::pair<const ZipLocalFileHeader, const std::string> tmp = std::make_pair(hdr, "CRC mismatch. Corrupt file: " + dest.toString());
EError.notify(this, tmp);
return false;
}
// cannot check against hdr.getUnCompressedSize if CRC and size are not set in hdr but in a ZipDataInfo
// crc is typically enough to detect errors
if (aFile.getSize() != hdr.getUncompressedSize() && !hdr.searchCRCAndSizesAfterData())
{
if (!_keepIncompleteFiles)
aFile.remove();
std::pair<const ZipLocalFileHeader, const std::string> tmp = std::make_pair(hdr, "Filesizes do not match. Corrupt file: " + dest.toString());
EError.notify(this, tmp);
return false;
}
std::pair<const ZipLocalFileHeader, const Poco::Path> tmp = std::make_pair(hdr, file);
EOk.notify(this, tmp);
}
catch (Poco::Exception& e)
{
std::pair<const ZipLocalFileHeader, const std::string> tmp = std::make_pair(hdr, std::string("Exception: " + e.displayText()));
EError.notify(this, tmp);
return false;
}
catch (...)
{
std::pair<const ZipLocalFileHeader, const std::string> tmp = std::make_pair(hdr, std::string("Unknown Exception"));
EError.notify(this, tmp);
return false;
}
return true;
}
void Decompress::onOk(const void*, std::pair<const ZipLocalFileHeader, const Poco::Path>& val)
{
_mapping.insert(std::make_pair(val.first.getFileName(), val.second));
}
} } // namespace Poco::Zip