274 lines
4.8 KiB
C++
274 lines
4.8 KiB
C++
/*
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* This file is a part of Winix
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* and is distributed under the 2-Clause BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2008-2014, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include "httpsimpleparser.h"
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#include "misc.h"
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#include "utf8/utf8.h"
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namespace Winix
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{
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void HttpSimpleParser::ToLower(std::wstring & s)
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{
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for(wchar_t & c : s)
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{
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if( c>='A' && c<='Z' )
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c = c - 'A' + 'a';
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}
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}
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bool HttpSimpleParser::IsWhite(int c)
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{
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if( c==' ' || c=='\t' )
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return true;
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return false;
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}
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void HttpSimpleParser::SkipWhiteChars()
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{
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while( IsWhite(last_c) )
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last_c = GetChar();
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}
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int HttpSimpleParser::ParseHalfHex(int c)
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{
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if( c>='a' && c<='z' )
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c += 'A' - 'a'; // to upper case
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if( c >= 'A' )
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c = c - 'A' + 10;
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else
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c = c - '0';
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c &= 0xf;
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return c;
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}
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void HttpSimpleParser::CheckSpecialChar()
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{
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if( last_c == '%' )
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{
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int c1 = GetChar();
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int c2 = GetChar();
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if( c1==-1 || c2==-1 )
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{
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last_c = -1;
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}
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else
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{
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c1 = ParseHalfHex(c1);
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c2 = ParseHalfHex(c2);
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last_c = (c1 << 4) + c2;
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}
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}
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else
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if( last_c == '+' )
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{
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last_c = ' ';
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}
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}
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void HttpSimpleParser::ReadName()
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{
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// we're checking 'separator' and '=' because the string is allowed not having '=' (the value is optional)
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utf8_token.clear();
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last_name.clear();
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for( ; last_c!=-1 && last_c!=separator && last_c!='=' ; last_c = GetChar() )
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{
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if( recognize_special_chars )
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CheckSpecialChar();
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if( last_c != -1 )
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{
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if( getchar_returns_utf8_chars )
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utf8_token += last_c;
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else
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last_name += last_c;
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}
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}
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if( getchar_returns_utf8_chars )
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PT::UTF8ToWide(utf8_token, last_name);
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if( last_c == '=' )
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last_c = GetChar();
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}
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void HttpSimpleParser::ReadQuotedValue()
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{
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// skipping '"'
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last_c = GetChar();
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utf8_token.clear();
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last_value.clear();
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for( ; last_c!=-1 && last_c!='"' ; last_c = GetChar() )
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{
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if( recognize_special_chars )
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CheckSpecialChar();
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if( last_c != -1 )
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{
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if( getchar_returns_utf8_chars )
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utf8_token += last_c;
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else
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last_value += last_c;
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}
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}
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if( getchar_returns_utf8_chars )
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PT::UTF8ToWide(utf8_token, last_value);
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if( last_c == '"' )
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last_c = GetChar();
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// looking for a separator (skipping)
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for( ; last_c!=-1 && last_c!=separator ; last_c = GetChar() );
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}
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void HttpSimpleParser::ReadNormalValue()
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{
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utf8_token.clear();
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last_value.clear();
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for( ; last_c!=-1 && last_c!=separator ; last_c = GetChar() )
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{
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if( recognize_special_chars )
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CheckSpecialChar();
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if( last_c != -1 )
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{
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if( getchar_returns_utf8_chars )
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utf8_token += last_c;
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else
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last_value += last_c;
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}
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}
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if( getchar_returns_utf8_chars )
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PT::UTF8ToWide(utf8_token, last_value);
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}
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void HttpSimpleParser::ReadValue()
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{
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if( skip_white_chars )
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SkipWhiteChars();
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if( value_can_be_quoted && last_c == '"' )
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ReadQuotedValue();
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else
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ReadNormalValue();
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if( last_c == separator )
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last_c = GetChar();
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}
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/*
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* there can be some important values like passwords so its better
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* to clear them now
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*/
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void HttpSimpleParser::Clear()
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{
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Overwrite(last_name);
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Overwrite(last_value);
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Overwrite(utf8_token);
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last_name.clear();
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last_value.clear();
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utf8_token.clear();
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}
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void HttpSimpleParser::Parse()
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{
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for( last_c = GetChar() ; last_c != -1 ; )
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{
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last_name.clear();
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last_value.clear();
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if( read_name )
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ReadName();
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ReadValue();
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if( skip_white_chars )
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{
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TrimWhite(last_name);
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TrimWhite(last_value);
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}
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Parameter(last_name, last_value); // user definied function
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}
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Clear();
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}
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} // namespace Winix
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