diff options
Diffstat (limited to 'indra/llcommon/llsdserialize.cpp')
| -rw-r--r-- | indra/llcommon/llsdserialize.cpp | 208 |
1 files changed, 193 insertions, 15 deletions
diff --git a/indra/llcommon/llsdserialize.cpp b/indra/llcommon/llsdserialize.cpp index 10f460e8a6..cce3e5d16e 100644 --- a/indra/llcommon/llsdserialize.cpp +++ b/indra/llcommon/llsdserialize.cpp @@ -4,25 +4,31 @@ * @date 2006-03-05 * @brief Implementation of LLSD parsers and formatters * - * $LicenseInfo:firstyear=2006&license=viewerlgpl$ - * Second Life Viewer Source Code - * Copyright (C) 2010, Linden Research, Inc. + * $LicenseInfo:firstyear=2006&license=viewergpl$ + * + * Copyright (c) 2006-2009, 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. + * Second Life Viewer Source Code + * The source code in this file ("Source Code") is provided by Linden Lab + * to you under the terms of the GNU General Public License, version 2.0 + * ("GPL"), unless you have obtained a separate licensing agreement + * ("Other License"), formally executed by you and Linden Lab. Terms of + * the GPL can be found in doc/GPL-license.txt in this distribution, or + * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 * - * 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. + * There are special exceptions to the terms and conditions of the GPL as + * it is applied to this Source Code. View the full text of the exception + * in the file doc/FLOSS-exception.txt in this software distribution, or + * online at + * http://secondlifegrid.net/programs/open_source/licensing/flossexception * - * 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 + * By copying, modifying or distributing this software, you acknowledge + * that you have read and understood your obligations described above, + * and agree to abide by those obligations. * - * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA + * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO + * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, + * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ @@ -33,6 +39,7 @@ #include <iostream> #include "apr_base64.h" +#include "zlib/zlib.h" // for davep's dirty little zip functions #if !LL_WINDOWS #include <netinet/in.h> // htonl & ntohl @@ -1983,3 +1990,174 @@ std::ostream& operator<<(std::ostream& s, const LLSD& llsd) return s; } + +//dirty little zippers -- yell at davep if these are horrid + +//return a string containing gzipped bytes of binary serialized LLSD +// VERY inefficient -- creates several copies of LLSD block in memory +std::string zip_llsd(LLSD& data) +{ + std::stringstream llsd_strm; + + LLSDSerialize::serialize(data, llsd_strm, LLSDSerialize::LLSD_BINARY); + + const U32 CHUNK = 65536; + + z_stream strm; + strm.zalloc = Z_NULL; + strm.zfree = Z_NULL; + strm.opaque = Z_NULL; + + S32 ret = deflateInit(&strm, Z_BEST_COMPRESSION); + if (ret != Z_OK) + { + llwarns << "Failed to compress LLSD block." << llendl; + return std::string(); + } + + std::string source = llsd_strm.str(); + + U8 out[CHUNK]; + + strm.avail_in = source.size(); + strm.next_in = (U8*) source.data(); + U8* output = NULL; + + U32 cur_size = 0; + + U32 have = 0; + + do + { + strm.avail_out = CHUNK; + strm.next_out = out; + + ret = deflate(&strm, Z_FINISH); + if (ret == Z_OK || ret == Z_STREAM_END) + { //copy result into output + if (strm.avail_out >= CHUNK) + { + llerrs << "WTF?" << llendl; + } + + have = CHUNK-strm.avail_out; + output = (U8*) realloc(output, cur_size+have); + memcpy(output+cur_size, out, have); + cur_size += have; + } + else + { + free(output); + llwarns << "Failed to compress LLSD block." << llendl; + return std::string(); + } + } + while (strm.avail_out == 0); + + std::string::size_type size = cur_size; + + std::string result((char*) output, size); + deflateEnd(&strm); + free(output); + + std::istringstream test(result); + LLSD test_sd; + if (!unzip_llsd(test_sd, test, result.size())) + { + llerrs << "Invalid compression result!" << llendl; + } + + return result; +} + +//decompress a block of LLSD from provided istream +// not very efficient -- creats a copy of decompressed LLSD block in memory +// and deserializes from that copy using LLSDSerialize +bool unzip_llsd(LLSD& data, std::istream& is, S32 size) +{ + U8* result = NULL; + U32 cur_size = 0; + z_stream strm; + + const U32 CHUNK = 65536; + + U8 *in = new U8[size]; + is.read((char*) in, size); + + U8 out[CHUNK]; + + strm.zalloc = Z_NULL; + strm.zfree = Z_NULL; + strm.opaque = Z_NULL; + strm.avail_in = size; + strm.next_in = in; + + S32 ret = inflateInit(&strm); + + if (ret != Z_OK) + { + llerrs << "WTF?" << llendl; + } + + do + { + strm.avail_out = CHUNK; + strm.next_out = out; + ret = inflate(&strm, Z_NO_FLUSH); + if (ret == Z_STREAM_ERROR) + { + inflateEnd(&strm); + free(result); + delete [] in; + return false; + } + + switch (ret) + { + case Z_NEED_DICT: + ret = Z_DATA_ERROR; + case Z_DATA_ERROR: + case Z_MEM_ERROR: + inflateEnd(&strm); + free(result); + delete [] in; + return false; + break; + } + + U32 have = CHUNK-strm.avail_out; + + result = (U8*) realloc(result, cur_size + have); + memcpy(result+cur_size, out, have); + cur_size += have; + + } while (strm.avail_out == 0); + + inflateEnd(&strm); + delete [] in; + + if (ret != Z_STREAM_END) + { + free(result); + return false; + } + + //result now points to the decompressed LLSD block + { + std::string res_str((char*) result, cur_size); + std::istringstream istr(res_str); + + if (!LLSDSerialize::deserialize(data, istr, cur_size)) + { + llwarns << "Failed to unzip LLSD block" << llendl; + free(result); + return false; + } + } + + free(result); + return true; +} + + + |