184 lines
6.8 KiB
C++
184 lines
6.8 KiB
C++
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/*
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*
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* @APPLE_LICENSE_HEADER_START@
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*
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* Copyright (c) 1999-2008 Apple Inc. All Rights Reserved.
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this
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* file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_LICENSE_HEADER_END@
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*
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*/
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/*
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File: UserAgentParser.cpp
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Contains: Parse the User-Agent: entry of an RTSP request.
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*/
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#include "StringParser.h"
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#include "StringFormatter.h"
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#include "StrPtrLen.h"
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#include "UserAgentParser.h"
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UserAgentParser::UserAgentFields UserAgentParser::sFieldIDs[] =
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{ /* fAttrName, len, id */
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{ "qtid", strlen("qtid"), eQtid },
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{ "qtver", strlen("qtver"), eQtver },
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{ "lang", strlen("lang"), eLang },
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{ "os", strlen("os"), eOs },
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{ "osver", strlen("osver"), eOsver },
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{ "cpu", strlen("cpu"), eCpu }
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};
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UInt8 UserAgentParser::sEOLWhitespaceEqualMask[] =
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{
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, //0-9 // \t is a stop
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1, 0, 0, 1, 0, 0, 0, 0, 0, 0, //10-19 //'\r' & '\n' are stop conditions
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29
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0, 0, 1, 0, 0, 0, 0, 0, 0, 0, //30-39 ' ' is a stop
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //40-49
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //50-59
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0, 1, 0, 0, 0, 0, 0, 0, 0, 0, //60-69 '=' is a stop
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //90-99
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //120-129
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249
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0, 0, 0, 0, 0, 0 //250-255
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};
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UInt8 UserAgentParser::sEOLSemicolonCloseParenMask[] =
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{
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, //0-9 // \t is a stop
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1, 0, 0, 1, 0, 0, 0, 0, 0, 0, //10-19 //'\r' & '\n' are stop conditions
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //20-29
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //30-39
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0, 1, 0, 0, 0, 0, 0, 0, 0, 0, //40-49 ')' is a stop
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0, 0, 0, 0, 0, 0, 0, 0, 0, 1, //50-59 ';' is a stop
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //60-69
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //70-79
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //80-89
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //90-99
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //100-109
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //110-119
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //120-129
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //130-139
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //140-149
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //150-159
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //160-169
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //170-179
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //180-189
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //190-199
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //200-209
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //210-219
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //220-229
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //230-239
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, //240-249
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0, 0, 0, 0, 0, 0 //250-255
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};
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void UserAgentParser::Parse(StrPtrLen *inStream)
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{
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StrPtrLen tempID;
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StrPtrLen tempData;
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StringParser parser(inStream);
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StrPtrLen startFields;
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memset(&fFieldData,0,sizeof(fFieldData) );
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parser.ConsumeUntil(&startFields, '(' ); // search for '(' if not found does nothing
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// parse through everything between the '(' and ')'.
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while (startFields.Len != 0)
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{
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//stop when we reach an empty line.
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tempID.Set(NULL,0);
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tempData.Set(NULL,0);
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parser.ConsumeLength(NULL, 1); // step past '(' or ';' if not found or at end of line does nothing
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parser.ConsumeWhitespace(); // search for non-white space if not found does nothing
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parser.ConsumeUntil(&tempID, sEOLWhitespaceEqualMask ); // search for end of id (whitespace or =)if not found does nothing
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if (tempID.Len == 0) break;
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parser.ConsumeUntil(NULL, '=' ); // find the '='
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parser.ConsumeLength(NULL, 1); // step past if not found or at end of line does nothing
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parser.ConsumeUntil(&tempData, sEOLSemicolonCloseParenMask ); // search for end of data if not found does nothing
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if (tempData.Len == 0) break;
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StrPtrLen testID;
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UInt32 fieldID;
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for (short testField = 0; testField < UserAgentParser::eNumAttributes; testField++)
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{
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testID.Set(sFieldIDs[testField].fFieldName,sFieldIDs[testField].fLen);
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fieldID = sFieldIDs[testField].fID;
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if ( (fFieldData[fieldID].fFound == false) && testID.Equal(tempID) )
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{
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fFieldData[fieldID].fData = tempData;
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fFieldData[fieldID].fFound = true;
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}
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}
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}
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// If we parsed the OS field but not the OSVer field then check and see if
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// the OS field contains the OS version. If it does copy it from there.
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// (e.g. 'os=Mac%209.2.2' or 'os=Windows%20NT%204.0'.)
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if (fFieldData[eOs].fFound && !fFieldData[eOsver].fFound)
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{
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UInt16 len = (UInt16)fFieldData[eOs].fData.Len;
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char* cp = (char*)fFieldData[eOs].fData.Ptr;
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// skip up to the blank space if it exists.
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// (i.e. the blank is URL encoded as '%20')
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while(*cp != '%')
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{
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len--;
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if (*cp == '\0' || len == 0)
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{
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// no blank space...so we're all done.
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return;
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}
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cp++;
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}
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// skip over the blank space.
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cp += 3; len -= 3;
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// the remaining string is the OS version.
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fFieldData[eOsver].fData.Set(cp, len);
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fFieldData[eOsver].fFound = true;
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// and truncate the version from the OS field.
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fFieldData[eOs].fData.Len -= len+3;
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}
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}
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