1 /*
2 * Copyright (C) 2011 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31 #include "config.h"
32 #include "platform/mhtml/MHTMLArchive.h"
33
34 #include "platform/DateComponents.h"
35 #include "platform/MIMETypeRegistry.h"
36 #include "platform/SerializedResource.h"
37 #include "platform/SharedBuffer.h"
38 #include "platform/mhtml/ArchiveResource.h"
39 #include "platform/mhtml/MHTMLParser.h"
40 #include "platform/text/QuotedPrintable.h"
41 #include "platform/weborigin/SchemeRegistry.h"
42 #include "wtf/CryptographicallyRandomNumber.h"
43 #include "wtf/DateMath.h"
44 #include "wtf/text/Base64.h"
45 #include "wtf/text/StringBuilder.h"
46
47 namespace blink {
48
49 const char* const quotedPrintable = "quoted-printable";
50 const char* const base64 = "base64";
51 const char* const binary = "binary";
52
generateRandomBoundary()53 static String generateRandomBoundary()
54 {
55 // Trying to generate random boundaries similar to IE/UnMHT (ex: ----=_NextPart_000_001B_01CC157B.96F808A0).
56 const size_t randomValuesLength = 10;
57 char randomValues[randomValuesLength];
58 cryptographicallyRandomValues(&randomValues, randomValuesLength);
59 StringBuilder stringBuilder;
60 stringBuilder.appendLiteral("----=_NextPart_000_");
61 for (size_t i = 0; i < randomValuesLength; ++i) {
62 if (i == 2)
63 stringBuilder.append('_');
64 else if (i == 6)
65 stringBuilder.append('.');
66 stringBuilder.append(lowerNibbleToASCIIHexDigit(randomValues[i]));
67 stringBuilder.append(upperNibbleToASCIIHexDigit(randomValues[i]));
68 }
69 return stringBuilder.toString();
70 }
71
replaceNonPrintableCharacters(const String & text)72 static String replaceNonPrintableCharacters(const String& text)
73 {
74 StringBuilder stringBuilder;
75 for (size_t i = 0; i < text.length(); ++i) {
76 if (isASCIIPrintable(text[i]))
77 stringBuilder.append(text[i]);
78 else
79 stringBuilder.append('?');
80 }
81 return stringBuilder.toString();
82 }
83
MHTMLArchive()84 MHTMLArchive::MHTMLArchive()
85 {
86 }
87
~MHTMLArchive()88 MHTMLArchive::~MHTMLArchive()
89 {
90 #if !ENABLE(OILPAN)
91 // Because all frames know about each other we need to perform a deep clearing of the archives graph.
92 clearAllSubframeArchives();
93 #endif
94 }
95
create()96 PassRefPtrWillBeRawPtr<MHTMLArchive> MHTMLArchive::create()
97 {
98 return adoptRefWillBeNoop(new MHTMLArchive);
99 }
100
create(const KURL & url,SharedBuffer * data)101 PassRefPtrWillBeRawPtr<MHTMLArchive> MHTMLArchive::create(const KURL& url, SharedBuffer* data)
102 {
103 // For security reasons we only load MHTML pages from local URLs.
104 if (!SchemeRegistry::shouldTreatURLSchemeAsLocal(url.protocol()))
105 return nullptr;
106
107 MHTMLParser parser(data);
108 RefPtrWillBeRawPtr<MHTMLArchive> mainArchive = parser.parseArchive();
109 if (!mainArchive)
110 return nullptr; // Invalid MHTML file.
111
112 // Since MHTML is a flat format, we need to make all frames aware of all resources.
113 for (size_t i = 0; i < parser.frameCount(); ++i) {
114 RefPtrWillBeRawPtr<MHTMLArchive> archive = parser.frameAt(i);
115 for (size_t j = 1; j < parser.frameCount(); ++j) {
116 if (i != j)
117 archive->addSubframeArchive(parser.frameAt(j));
118 }
119 for (size_t j = 0; j < parser.subResourceCount(); ++j)
120 archive->addSubresource(parser.subResourceAt(j));
121 }
122 return mainArchive.release();
123 }
124
generateMHTMLData(const Vector<SerializedResource> & resources,EncodingPolicy encodingPolicy,const String & title,const String & mimeType)125 PassRefPtr<SharedBuffer> MHTMLArchive::generateMHTMLData(const Vector<SerializedResource>& resources, EncodingPolicy encodingPolicy, const String& title, const String& mimeType)
126 {
127 String boundary = generateRandomBoundary();
128 String endOfResourceBoundary = "--" + boundary + "\r\n";
129
130 DateComponents now;
131 now.setMillisecondsSinceEpochForDateTime(currentTimeMS());
132 String dateString = makeRFC2822DateString(now.weekDay(), now.monthDay(), now.month(), now.fullYear(), now.hour(), now.minute(), now.second(), 0);
133
134 StringBuilder stringBuilder;
135 stringBuilder.appendLiteral("From: <Saved by WebKit>\r\n");
136 stringBuilder.appendLiteral("Subject: ");
137 // We replace non ASCII characters with '?' characters to match IE's behavior.
138 stringBuilder.append(replaceNonPrintableCharacters(title));
139 stringBuilder.appendLiteral("\r\nDate: ");
140 stringBuilder.append(dateString);
141 stringBuilder.appendLiteral("\r\nMIME-Version: 1.0\r\n");
142 stringBuilder.appendLiteral("Content-Type: multipart/related;\r\n");
143 stringBuilder.appendLiteral("\ttype=\"");
144 stringBuilder.append(mimeType);
145 stringBuilder.appendLiteral("\";\r\n");
146 stringBuilder.appendLiteral("\tboundary=\"");
147 stringBuilder.append(boundary);
148 stringBuilder.appendLiteral("\"\r\n\r\n");
149
150 // We use utf8() below instead of ascii() as ascii() replaces CRLFs with ?? (we still only have put ASCII characters in it).
151 ASSERT(stringBuilder.toString().containsOnlyASCII());
152 CString asciiString = stringBuilder.toString().utf8();
153 RefPtr<SharedBuffer> mhtmlData = SharedBuffer::create();
154 mhtmlData->append(asciiString.data(), asciiString.length());
155
156 for (size_t i = 0; i < resources.size(); ++i) {
157 const SerializedResource& resource = resources[i];
158
159 stringBuilder.clear();
160 stringBuilder.append(endOfResourceBoundary);
161 stringBuilder.appendLiteral("Content-Type: ");
162 stringBuilder.append(resource.mimeType);
163
164 const char* contentEncoding = 0;
165 if (encodingPolicy == UseBinaryEncoding)
166 contentEncoding = binary;
167 else if (MIMETypeRegistry::isSupportedJavaScriptMIMEType(resource.mimeType) || MIMETypeRegistry::isSupportedNonImageMIMEType(resource.mimeType))
168 contentEncoding = quotedPrintable;
169 else
170 contentEncoding = base64;
171
172 stringBuilder.appendLiteral("\r\nContent-Transfer-Encoding: ");
173 stringBuilder.append(contentEncoding);
174 stringBuilder.appendLiteral("\r\nContent-Location: ");
175 stringBuilder.append(resource.url);
176 stringBuilder.appendLiteral("\r\n\r\n");
177
178 asciiString = stringBuilder.toString().utf8();
179 mhtmlData->append(asciiString.data(), asciiString.length());
180
181 if (!strcmp(contentEncoding, binary)) {
182 const char* data;
183 size_t position = 0;
184 while (size_t length = resource.data->getSomeData(data, position)) {
185 mhtmlData->append(data, length);
186 position += length;
187 }
188 } else {
189 // FIXME: ideally we would encode the content as a stream without having to fetch it all.
190 const char* data = resource.data->data();
191 size_t dataLength = resource.data->size();
192 Vector<char> encodedData;
193 if (!strcmp(contentEncoding, quotedPrintable)) {
194 quotedPrintableEncode(data, dataLength, encodedData);
195 mhtmlData->append(encodedData.data(), encodedData.size());
196 mhtmlData->append("\r\n", 2);
197 } else {
198 ASSERT(!strcmp(contentEncoding, base64));
199 // We are not specifying insertLFs = true below as it would cut the lines with LFs and MHTML requires CRLFs.
200 base64Encode(data, dataLength, encodedData);
201 const size_t maximumLineLength = 76;
202 size_t index = 0;
203 size_t encodedDataLength = encodedData.size();
204 do {
205 size_t lineLength = std::min(encodedDataLength - index, maximumLineLength);
206 mhtmlData->append(encodedData.data() + index, lineLength);
207 mhtmlData->append("\r\n", 2);
208 index += maximumLineLength;
209 } while (index < encodedDataLength);
210 }
211 }
212 }
213
214 asciiString = String("--" + boundary + "--\r\n").utf8();
215 mhtmlData->append(asciiString.data(), asciiString.length());
216
217 return mhtmlData.release();
218 }
219
220 #if !ENABLE(OILPAN)
clearAllSubframeArchives()221 void MHTMLArchive::clearAllSubframeArchives()
222 {
223 SubFrameArchives clearedArchives;
224 clearAllSubframeArchivesImpl(&clearedArchives);
225 }
226
clearAllSubframeArchivesImpl(SubFrameArchives * clearedArchives)227 void MHTMLArchive::clearAllSubframeArchivesImpl(SubFrameArchives* clearedArchives)
228 {
229 for (SubFrameArchives::iterator it = m_subframeArchives.begin(); it != m_subframeArchives.end(); ++it) {
230 if (!clearedArchives->contains(*it)) {
231 clearedArchives->append(*it);
232 (*it)->clearAllSubframeArchivesImpl(clearedArchives);
233 }
234 }
235 m_subframeArchives.clear();
236 }
237 #endif
238
setMainResource(PassRefPtrWillBeRawPtr<ArchiveResource> mainResource)239 void MHTMLArchive::setMainResource(PassRefPtrWillBeRawPtr<ArchiveResource> mainResource)
240 {
241 m_mainResource = mainResource;
242 }
243
addSubresource(PassRefPtrWillBeRawPtr<ArchiveResource> subResource)244 void MHTMLArchive::addSubresource(PassRefPtrWillBeRawPtr<ArchiveResource> subResource)
245 {
246 m_subresources.append(subResource);
247 }
248
addSubframeArchive(PassRefPtrWillBeRawPtr<MHTMLArchive> subframeArchive)249 void MHTMLArchive::addSubframeArchive(PassRefPtrWillBeRawPtr<MHTMLArchive> subframeArchive)
250 {
251 m_subframeArchives.append(subframeArchive);
252 }
253
trace(Visitor * visitor)254 void MHTMLArchive::trace(Visitor* visitor)
255 {
256 visitor->trace(m_mainResource);
257 visitor->trace(m_subresources);
258 visitor->trace(m_subframeArchives);
259 }
260
261 }
262