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/*
* Copyright (C) 2011 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "MIMEHeader.h"
#include "ContentTypeParser.h"
#include "SharedBufferChunkReader.h"
#include <wtf/HashMap.h>
#include <wtf/text/CString.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/text/StringConcatenate.h>
#include <wtf/text/StringHash.h>
namespace WebCore {
typedef HashMap<String, String> KeyValueMap;
static KeyValueMap retrieveKeyValuePairs(WebCore::SharedBufferChunkReader* buffer)
{
KeyValueMap keyValuePairs;
String line;
String key;
StringBuilder value;
while (!(line = buffer->nextChunkAsUTF8StringWithLatin1Fallback()).isNull()) {
if (line.isEmpty())
break; // Empty line means end of key/value section.
if (line[0] == '\t') {
ASSERT(!key.isEmpty());
value.append(line.substring(1));
continue;
}
// New key/value, store the previous one if any.
if (!key.isEmpty()) {
if (keyValuePairs.find(key) != keyValuePairs.end())
LOG_ERROR("Key duplicate found in MIME header. Key is '%s', previous value replaced.", key.ascii().data());
keyValuePairs.add(key, value.toString().stripWhiteSpace());
key = String();
value.clear();
}
size_t semiColonIndex = line.find(':');
if (semiColonIndex == notFound) {
// This is not a key value pair, ignore.
continue;
}
key = line.substring(0, semiColonIndex).lower().stripWhiteSpace();
value.append(line.substring(semiColonIndex + 1));
}
// Store the last property if there is one.
if (!key.isEmpty())
keyValuePairs.set(key, value.toString().stripWhiteSpace());
return keyValuePairs;
}
PassRefPtr<MIMEHeader> MIMEHeader::parseHeader(SharedBufferChunkReader* buffer)
{
RefPtr<MIMEHeader> mimeHeader = adoptRef(new MIMEHeader);
KeyValueMap keyValuePairs = retrieveKeyValuePairs(buffer);
KeyValueMap::iterator mimeParametersIterator = keyValuePairs.find("content-type");
if (mimeParametersIterator != keyValuePairs.end()) {
// FIXME: make ContentTypeParser more flexible so we don't have to synthesize the "Content-Type:".
ContentTypeParser contentTypeParser(makeString("Content-Type:", mimeParametersIterator->value));
mimeHeader->m_contentType = contentTypeParser.mimeType();
if (!mimeHeader->isMultipart())
mimeHeader->m_charset = contentTypeParser.charset().stripWhiteSpace();
else {
mimeHeader->m_multipartType = contentTypeParser.parameterValueForName("type");
mimeHeader->m_endOfPartBoundary = contentTypeParser.parameterValueForName("boundary");
if (mimeHeader->m_endOfPartBoundary.isNull()) {
LOG_ERROR("No boundary found in multipart MIME header.");
return 0;
}
mimeHeader->m_endOfPartBoundary.insert("--", 0);
mimeHeader->m_endOfDocumentBoundary = mimeHeader->m_endOfPartBoundary;
mimeHeader->m_endOfDocumentBoundary.append("--");
}
}
mimeParametersIterator = keyValuePairs.find("content-transfer-encoding");
if (mimeParametersIterator != keyValuePairs.end())
mimeHeader->m_contentTransferEncoding = parseContentTransferEncoding(mimeParametersIterator->value);
mimeParametersIterator = keyValuePairs.find("content-location");
if (mimeParametersIterator != keyValuePairs.end())
mimeHeader->m_contentLocation = mimeParametersIterator->value;
return mimeHeader.release();
}
MIMEHeader::Encoding MIMEHeader::parseContentTransferEncoding(const String& text)
{
String encoding = text.stripWhiteSpace().lower();
if (encoding == "base64")
return Base64;
if (encoding == "quoted-printable")
return QuotedPrintable;
if (encoding == "7bit")
return SevenBit;
if (encoding == "binary")
return Binary;
LOG_ERROR("Unknown encoding '%s' found in MIME header.", text.ascii().data());
return Unknown;
}
MIMEHeader::MIMEHeader()
: m_contentTransferEncoding(Unknown)
{
}
}
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