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 "MIMEHeader.h"
33
34#if ENABLE(MHTML)
35
36#include "ParsedContentType.h"
37#include "SharedBufferChunkReader.h"
38#include <wtf/HashMap.h>
39#include <wtf/text/CString.h>
40#include <wtf/text/StringBuilder.h>
41#include <wtf/text/StringConcatenate.h>
42#include <wtf/text/StringHash.h>
43
44namespace WebCore {
45
46typedef HashMap<String, String> KeyValueMap;
47
48static KeyValueMap retrieveKeyValuePairs(WebCore::SharedBufferChunkReader& buffer)
49{
50 KeyValueMap keyValuePairs;
51 String line;
52 String key;
53 StringBuilder value;
54 while (!(line = buffer.nextChunkAsUTF8StringWithLatin1Fallback()).isNull()) {
55 if (line.isEmpty())
56 break; // Empty line means end of key/value section.
57 if (line[0] == '\t') {
58 ASSERT(!key.isEmpty());
59 value.append(line.substring(1));
60 continue;
61 }
62 // New key/value, store the previous one if any.
63 if (!key.isEmpty()) {
64 if (keyValuePairs.find(key) != keyValuePairs.end())
65 LOG_ERROR("Key duplicate found in MIME header. Key is '%s', previous value replaced.", key.ascii().data());
66 keyValuePairs.add(key, value.toString().stripWhiteSpace());
67 key = String();
68 value.clear();
69 }
70 size_t semiColonIndex = line.find(':');
71 if (semiColonIndex == notFound) {
72 // This is not a key value pair, ignore.
73 continue;
74 }
75 key = line.substring(0, semiColonIndex).convertToASCIILowercase().stripWhiteSpace();
76 value.append(line.substring(semiColonIndex + 1));
77 }
78 // Store the last property if there is one.
79 if (!key.isEmpty())
80 keyValuePairs.set(key, value.toString().stripWhiteSpace());
81 return keyValuePairs;
82}
83
84RefPtr<MIMEHeader> MIMEHeader::parseHeader(SharedBufferChunkReader& buffer)
85{
86 auto mimeHeader = adoptRef(*new MIMEHeader);
87 KeyValueMap keyValuePairs = retrieveKeyValuePairs(buffer);
88 KeyValueMap::iterator mimeParametersIterator = keyValuePairs.find("content-type");
89 if (mimeParametersIterator != keyValuePairs.end()) {
90 String contentType, charset, multipartType, endOfPartBoundary;
91 if (auto parsedContentType = ParsedContentType::create(mimeParametersIterator->value)) {
92 contentType = parsedContentType->mimeType();
93 charset = parsedContentType->charset().stripWhiteSpace();
94 multipartType = parsedContentType->parameterValueForName("type");
95 endOfPartBoundary = parsedContentType->parameterValueForName("boundary");
96 }
97 mimeHeader->m_contentType = contentType;
98 if (!mimeHeader->isMultipart())
99 mimeHeader->m_charset = charset;
100 else {
101 mimeHeader->m_multipartType = multipartType;
102 mimeHeader->m_endOfPartBoundary = endOfPartBoundary;
103 if (mimeHeader->m_endOfPartBoundary.isNull()) {
104 LOG_ERROR("No boundary found in multipart MIME header.");
105 return nullptr;
106 }
107 mimeHeader->m_endOfPartBoundary = "--" + mimeHeader->m_endOfPartBoundary;
108 mimeHeader->m_endOfDocumentBoundary = mimeHeader->m_endOfPartBoundary + "--";
109 }
110 }
111
112 mimeParametersIterator = keyValuePairs.find("content-transfer-encoding");
113 if (mimeParametersIterator != keyValuePairs.end())
114 mimeHeader->m_contentTransferEncoding = parseContentTransferEncoding(mimeParametersIterator->value);
115
116 mimeParametersIterator = keyValuePairs.find("content-location");
117 if (mimeParametersIterator != keyValuePairs.end())
118 mimeHeader->m_contentLocation = mimeParametersIterator->value;
119
120 return mimeHeader;
121}
122
123MIMEHeader::Encoding MIMEHeader::parseContentTransferEncoding(const String& text)
124{
125 String encoding = text.stripWhiteSpace();
126 if (equalLettersIgnoringASCIICase(encoding, "base64"))
127 return Base64;
128 if (equalLettersIgnoringASCIICase(encoding, "quoted-printable"))
129 return QuotedPrintable;
130 if (equalLettersIgnoringASCIICase(encoding, "7bit"))
131 return SevenBit;
132 if (equalLettersIgnoringASCIICase(encoding, "binary"))
133 return Binary;
134 LOG_ERROR("Unknown encoding '%s' found in MIME header.", text.ascii().data());
135 return Unknown;
136}
137
138MIMEHeader::MIMEHeader()
139 : m_contentTransferEncoding(Unknown)
140{
141}
142
143}
144
145#endif
146