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Diffstat (limited to 'indra/llmessage/llmime.cpp')
| -rw-r--r-- | indra/llmessage/llmime.cpp | 628 |
1 files changed, 0 insertions, 628 deletions
diff --git a/indra/llmessage/llmime.cpp b/indra/llmessage/llmime.cpp deleted file mode 100644 index 90653098db..0000000000 --- a/indra/llmessage/llmime.cpp +++ /dev/null @@ -1,628 +0,0 @@ -/** - * @file llmime.cpp - * @author Phoenix - * @date 2006-12-20 - * @brief Implementation of mime tools. - * - * $LicenseInfo:firstyear=2006&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; - * version 2.1 of the License only. - * - * 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA - * $/LicenseInfo$ - */ - -#include "linden_common.h" -#include "llhttpconstants.h" -#include "llmime.h" - -#include <vector> - -#include "llmemorystream.h" - -/** - * Useful constants. - */ -// parser helpers -static const std::string MULTIPART("multipart"); -static const std::string BOUNDARY("boundary"); -static const std::string END_OF_CONTENT_PARAMETER("\r\n ;\t"); -static const std::string SEPARATOR_PREFIX("--"); -//static const std::string SEPARATOR_SUFFIX("\r\n"); - -/* -Content-Type: multipart/mixed; boundary="segment" -Content-Length: 24832 - ---segment -Content-Type: image/j2c -Content-Length: 23715 - -<data> - ---segment -Content-Type: text/xml; charset=UTF-8 - -<meta data> -EOF - -*/ - -/** - * LLMimeIndex - */ - -/** - * @class LLMimeIndex::Impl - * @brief Implementation details of the mime index class. - * @see LLMimeIndex - */ -class LLMimeIndex::Impl -{ -public: - Impl() : mOffset(-1), mUseCount(1) - {} - Impl(LLSD headers, S32 offset) : - mHeaders(headers), mOffset(offset), mUseCount(1) - {} -public: - LLSD mHeaders; - S32 mOffset; - S32 mUseCount; - - typedef std::vector<LLMimeIndex> sub_part_t; - sub_part_t mAttachments; -}; - -LLSD LLMimeIndex::headers() const -{ - return mImpl->mHeaders; -} - -S32 LLMimeIndex::offset() const -{ - return mImpl->mOffset; -} - -S32 LLMimeIndex::contentLength() const -{ - // Find the content length in the headers. - S32 length = -1; - LLSD content_length = mImpl->mHeaders[HTTP_HEADER_CONTENT_LENGTH]; - if(content_length.isDefined()) - { - length = content_length.asInteger(); - } - return length; -} - -std::string LLMimeIndex::contentType() const -{ - std::string type; - LLSD content_type = mImpl->mHeaders[HTTP_HEADER_CONTENT_TYPE]; - if(content_type.isDefined()) - { - type = content_type.asString(); - } - return type; -} - -bool LLMimeIndex::isMultipart() const -{ - bool multipart = false; - LLSD content_type = mImpl->mHeaders[HTTP_HEADER_CONTENT_TYPE]; - if(content_type.isDefined()) - { - std::string type = content_type.asString(); - int comp = type.compare(0, MULTIPART.size(), MULTIPART); - if(0 == comp) - { - multipart = true; - } - } - return multipart; -} - -S32 LLMimeIndex::subPartCount() const -{ - return mImpl->mAttachments.size(); -} - -LLMimeIndex LLMimeIndex::subPart(S32 index) const -{ - LLMimeIndex part; - if((index >= 0) && (index < (S32)mImpl->mAttachments.size())) - { - part = mImpl->mAttachments[index]; - } - return part; -} - -LLMimeIndex::LLMimeIndex() : mImpl(new LLMimeIndex::Impl) -{ -} - -LLMimeIndex::LLMimeIndex(LLSD headers, S32 content_offset) : - mImpl(new LLMimeIndex::Impl(headers, content_offset)) -{ -} - -LLMimeIndex::LLMimeIndex(const LLMimeIndex& mime) : - mImpl(mime.mImpl) -{ - ++mImpl->mUseCount; -} - -LLMimeIndex::~LLMimeIndex() -{ - if(0 == --mImpl->mUseCount) - { - delete mImpl; - } -} - -LLMimeIndex& LLMimeIndex::operator=(const LLMimeIndex& mime) -{ - // Increment use count first so that we handle self assignment - // automatically. - ++mime.mImpl->mUseCount; - if(0 == --mImpl->mUseCount) - { - delete mImpl; - } - mImpl = mime.mImpl; - return *this; -} - -bool LLMimeIndex::attachSubPart(LLMimeIndex sub_part) -{ - // *FIX: Should we check for multi-part? - if(mImpl->mAttachments.size() < S32_MAX) - { - mImpl->mAttachments.push_back(sub_part); - return true; - } - return false; -} - -/** - * LLMimeParser - */ -/** - * @class LLMimeParser::Impl - * @brief Implementation details of the mime parser class. - * @see LLMimeParser - */ -class LLMimeParser::Impl -{ -public: - // @brief Constructor. - Impl(); - - // @brief Reset this for a new parse. - void reset(); - - /** - * @brief Parse a mime entity to find the index information. - * - * This method will scan the istr until a single complete mime - * entity is read, an EOF, or limit bytes have been scanned. The - * istr will be modified by this parsing, so pass in a temporary - * stream or rewind/reset the stream after this call. - * @param istr An istream which contains a mime entity. - * @param limit The maximum number of bytes to scan. - * @param separator The multipart separator if it is known. - * @param is_subpart Set true if parsing a multipart sub part. - * @param index[out] The parsed output. - * @return Returns true if an index was parsed and no errors occurred. - */ - bool parseIndex( - std::istream& istr, - S32 limit, - const std::string& separator, - bool is_subpart, - LLMimeIndex& index); - -protected: - /** - * @brief parse the headers. - * - * At the end of a successful parse, mScanCount will be at the - * start of the content. - * @param istr The input stream. - * @param limit maximum number of bytes to process - * @param headers[out] A map of the headers found. - * @return Returns true if the parse was successful. - */ - bool parseHeaders(std::istream& istr, S32 limit, LLSD& headers); - - /** - * @brief Figure out the separator string from a content type header. - * - * @param multipart_content_type The content type value from the headers. - * @return Returns the separator string. - */ - std::string findSeparator(std::string multipart_content_type); - - /** - * @brief Scan through istr past the separator. - * - * @param istr The input stream. - * @param limit Maximum number of bytes to scan. - * @param separator The multipart separator. - */ - void scanPastSeparator( - std::istream& istr, - S32 limit, - const std::string& separator); - - /** - * @brief Scan through istr past the content of the current mime part. - * - * @param istr The input stream. - * @param limit Maximum number of bytes to scan. - * @param headers The headers for this mime part. - * @param separator The multipart separator if known. - */ - void scanPastContent( - std::istream& istr, - S32 limit, - LLSD headers, - const std::string separator); - - /** - * @brief Eat CRLF. - * - * This method has no concept of the limit, so ensure you have at - * least 2 characters left to eat before hitting the limit. This - * method will increment mScanCount as it goes. - * @param istr The input stream. - * @return Returns true if CRLF was found and consumed off of istr. - */ - bool eatCRLF(std::istream& istr); - - // @brief Returns true if parsing should continue. - bool continueParse() const { return (!mError && mContinue); } - - // @brief anonymous enumeration for parse buffer size. - enum - { - LINE_BUFFER_LENGTH = 1024 - }; - -protected: - S32 mScanCount; - bool mContinue; - bool mError; - char mBuffer[LINE_BUFFER_LENGTH]; -}; - -LLMimeParser::Impl::Impl() -{ - reset(); -} - -void LLMimeParser::Impl::reset() -{ - mScanCount = 0; - mContinue = true; - mError = false; - mBuffer[0] = '\0'; -} - -bool LLMimeParser::Impl::parseIndex( - std::istream& istr, - S32 limit, - const std::string& separator, - bool is_subpart, - LLMimeIndex& index) -{ - LLSD headers; - bool parsed_something = false; - if(parseHeaders(istr, limit, headers)) - { - parsed_something = true; - LLMimeIndex mime(headers, mScanCount); - index = mime; - if(index.isMultipart()) - { - // Figure out the separator, scan past it, and recurse. - std::string ct = headers[HTTP_HEADER_CONTENT_TYPE].asString(); - std::string sep = findSeparator(ct); - scanPastSeparator(istr, limit, sep); - while(continueParse() && parseIndex(istr, limit, sep, true, mime)) - { - index.attachSubPart(mime); - } - } - else - { - // Scan to the end of content. - scanPastContent(istr, limit, headers, separator); - if(is_subpart) - { - scanPastSeparator(istr, limit, separator); - } - } - } - if(mError) return false; - return parsed_something; -} - -bool LLMimeParser::Impl::parseHeaders( - std::istream& istr, - S32 limit, - LLSD& headers) -{ - // Headers specified in rfc-2045 will be canonicalized below. - static const S32 KNOWN_HEADER_COUNT = 6; - static const std::string KNOWN_HEADER[KNOWN_HEADER_COUNT] = - { - HTTP_HEADER_CONTENT_LENGTH, - HTTP_HEADER_CONTENT_TYPE, - HTTP_HEADER_MIME_VERSION, - HTTP_HEADER_CONTENT_TRANSFER_ENCODING, - HTTP_HEADER_CONTENT_ID, - HTTP_HEADER_CONTENT_DESCRIPTION, - }; - - while(continueParse()) - { - // Get the next line. - // We subtract 1 from the limit so that we make sure - // not to read past limit when we get() the newline. - S32 max_get = llmin((S32)LINE_BUFFER_LENGTH, limit - mScanCount - 1); - istr.getline(mBuffer, max_get, '\r'); - mScanCount += (S32)istr.gcount(); - int c = istr.get(); - if(EOF == c) - { - mContinue = false; - return false; - } - ++mScanCount; - if(c != '\n') - { - mError = true; - return false; - } - if(mScanCount >= limit) - { - mContinue = false; - } - - // Check if that's the end of headers. - if('\0' == mBuffer[0]) - { - break; - } - - // Split out the name and value. - // *NOTE: The use of strchr() here is safe since mBuffer is - // guaranteed to be NULL terminated from the call to getline() - // above. - char* colon = strchr(mBuffer, ':'); - if(!colon) - { - mError = true; - return false; - } - - // Cononicalize the name part, and store the name: value in - // the headers structure. We do this by iterating through - // 'known' headers and replacing the value found with the - // correct one. - // *NOTE: Not so efficient, but iterating through a small - // subset should not be too much of an issue. - std::string name(mBuffer, colon++ - mBuffer); - while(isspace(*colon)) ++colon; - std::string value(colon); - for(S32 ii = 0; ii < KNOWN_HEADER_COUNT; ++ii) - { - if(0 == LLStringUtil::compareInsensitive(name, KNOWN_HEADER[ii])) - { - name = KNOWN_HEADER[ii]; - break; - } - } - headers[name] = value; - } - if(headers.isUndefined()) return false; - return true; -} - -std::string LLMimeParser::Impl::findSeparator(std::string header) -{ - // 01234567890 - //Content-Type: multipart/mixed; boundary="segment" - std::string separator; - std::string::size_type pos = header.find(BOUNDARY); - if(std::string::npos == pos) return separator; - pos += BOUNDARY.size() + 1; - std::string::size_type end; - if(header[pos] == '"') - { - // the boundary is quoted, find the end from pos, and take the - // substring. - end = header.find('"', ++pos); - if(std::string::npos == end) - { - // poorly formed boundary. - mError = true; - } - } - else - { - // otherwise, it's every character until a whitespace, end of - // line, or another parameter begins. - end = header.find_first_of(END_OF_CONTENT_PARAMETER, pos); - if(std::string::npos == end) - { - // it goes to the end of the string. - end = header.size(); - } - } - if(!mError) separator = header.substr(pos, end - pos); - return separator; -} - -void LLMimeParser::Impl::scanPastSeparator( - std::istream& istr, - S32 limit, - const std::string& sep) -{ - std::ostringstream ostr; - ostr << SEPARATOR_PREFIX << sep; - std::string separator = ostr.str(); - bool found_separator = false; - while(!found_separator && continueParse()) - { - // Subtract 1 from the limit so that we make sure not to read - // past limit when we get() the newline. - S32 max_get = llmin((S32)LINE_BUFFER_LENGTH, limit - mScanCount - 1); - istr.getline(mBuffer, max_get, '\r'); - mScanCount += (S32)istr.gcount(); - if(istr.gcount() >= LINE_BUFFER_LENGTH - 1) - { - // that's way too long to be a separator, so ignore it. - continue; - } - int c = istr.get(); - if(EOF == c) - { - mContinue = false; - return; - } - ++mScanCount; - if(c != '\n') - { - mError = true; - return; - } - if(mScanCount >= limit) - { - mContinue = false; - } - if(0 == LLStringUtil::compareStrings(std::string(mBuffer), separator)) - { - found_separator = true; - } - } -} - -void LLMimeParser::Impl::scanPastContent( - std::istream& istr, - S32 limit, - LLSD headers, - const std::string separator) -{ - if(headers.has(HTTP_HEADER_CONTENT_LENGTH)) - { - S32 content_length = headers[HTTP_HEADER_CONTENT_LENGTH].asInteger(); - // Subtract 2 here for the \r\n after the content. - S32 max_skip = llmin(content_length, limit - mScanCount - 2); - istr.ignore(max_skip); - mScanCount += max_skip; - - // *NOTE: Check for hitting the limit and eof here before - // checking for the trailing EOF, because our mime parser has - // to gracefully handle incomplete mime entites. - if((mScanCount >= limit) || istr.eof()) - { - mContinue = false; - } - else if(!eatCRLF(istr)) - { - mError = true; - return; - } - } -} - -bool LLMimeParser::Impl::eatCRLF(std::istream& istr) -{ - int c = istr.get(); - ++mScanCount; - if(c != '\r') - { - return false; - } - c = istr.get(); - ++mScanCount; - if(c != '\n') - { - return false; - } - return true; -} - - -LLMimeParser::LLMimeParser() : mImpl(* new LLMimeParser::Impl) -{ -} - -LLMimeParser::~LLMimeParser() -{ - delete & mImpl; -} - -void LLMimeParser::reset() -{ - mImpl.reset(); -} - -bool LLMimeParser::parseIndex(std::istream& istr, LLMimeIndex& index) -{ - std::string separator; - return mImpl.parseIndex(istr, S32_MAX, separator, false, index); -} - -bool LLMimeParser::parseIndex( - const std::vector<U8>& buffer, - LLMimeIndex& index) -{ - LLMemoryStream mstr(&buffer[0], buffer.size()); - return parseIndex(mstr, buffer.size() + 1, index); -} - -bool LLMimeParser::parseIndex( - std::istream& istr, - S32 limit, - LLMimeIndex& index) -{ - std::string separator; - return mImpl.parseIndex(istr, limit, separator, false, index); -} - -bool LLMimeParser::parseIndex(const U8* buffer, S32 length, LLMimeIndex& index) -{ - LLMemoryStream mstr(buffer, length); - return parseIndex(mstr, length + 1, index); -} - -/* -bool LLMimeParser::verify(std::istream& isr, LLMimeIndex& index) const -{ - return false; -} - -bool LLMimeParser::verify(U8* buffer, S32 length, LLMimeIndex& index) const -{ - LLMemoryStream mstr(buffer, length); - return verify(mstr, index); -} -*/ |