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
|
/*
This file is part of the KDE libraries
Copyright (c) 2002 Waldo Bastian <bastian@kde.org>
Copyright 2009 David Faure <faure@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License version 2 as published by the Free Software Foundation.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "httpfiltergzip_p.h"
#include <kcompressiondevice.h>
#include <kfilterbase.h>
#include <KLocalizedString>
#include "kmultipart_debug.h"
HTTPFilterGZip::HTTPFilterGZip()
: m_firstData(true),
m_finished(false)
{
// We can't use KFilterDev because it assumes it can read as much data as necessary
// from the underlying device. It's a pull strategy, while we have to do
// a push strategy.
m_gzipFilter = KCompressionDevice::filterForCompressionType(KCompressionDevice::GZip);
}
HTTPFilterGZip::~HTTPFilterGZip()
{
m_gzipFilter->terminate();
delete m_gzipFilter;
}
/*
The data format used by the zlib library is described by RFCs (Request for
Comments) 1950 to 1952 in the files ftp://ds.internic.net/rfc/rfc1950.txt
(zlib format), rfc1951.txt (deflate format) and rfc1952.txt (gzip format).
Use /usr/include/zlib.h as the primary source of documentation though.
*/
void
HTTPFilterGZip::slotInput(const QByteArray &d)
{
if (d.isEmpty()) {
return;
}
//qCDebug(KHTML_LOG) << "Got" << d.size() << "bytes as input";
if (m_firstData) {
m_gzipFilter->setFilterFlags(KFilterBase::WithHeaders);
m_gzipFilter->init(QIODevice::ReadOnly);
m_firstData = false;
}
m_gzipFilter->setInBuffer(d.constData(), d.size());
while (!m_gzipFilter->inBufferEmpty() && !m_finished) {
char buf[8192];
m_gzipFilter->setOutBuffer(buf, sizeof(buf));
KFilterBase::Result result = m_gzipFilter->uncompress();
//qCDebug(KMULTIPART_LOG) << "uncompress returned" << result;
switch (result) {
case KFilterBase::Ok:
case KFilterBase::End: {
const int bytesOut = sizeof(buf) - m_gzipFilter->outBufferAvailable();
if (bytesOut) {
emit output(QByteArray(buf, bytesOut));
}
if (result == KFilterBase::End) {
//qCDebug(KMULTIPART_LOG) << "done, bHasFinished=true";
emit output(QByteArray());
m_finished = true;
}
break;
}
case KFilterBase::Error:
qCDebug(KMULTIPART_LOG) << "Error from KGZipFilter";
emit error(i18n("Receiving corrupt data."));
m_finished = true; // exit this while loop
break;
}
}
}
|
