234 lines
3.3 KiB
C++
Executable File
234 lines
3.3 KiB
C++
Executable File
/*
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* This file is a part of Winix
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* and is not publicly distributed
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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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*/
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#include "httpsimpleparser.h"
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namespace Winix
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{
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void HttpSimpleParser::ToLower(std::string & s)
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{
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std::string::iterator i;
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for(i=s.begin() ; i!= s.end() ; ++i)
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{
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if( *i>='A' && *i<='Z' )
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*i = *i - '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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void HttpSimpleParser::TrimWhiteChars(std::string & s)
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{
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if( s.empty() )
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return;
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std::string::size_type i;
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for(i = 0 ; i<s.size() && IsWhite(s[i]) ; ++i);
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if( i == s.size() )
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{
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// all characters are white
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s.clear();
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return;
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}
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if( i > 0 )
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// there are some white characters at the beginning
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s.erase(0, i);
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// s is not empty now (i was not equal s.size())
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// and we have some non white characters
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// we stops at the last non white character
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for(i = s.size()-1 ; i>0 && IsWhite(s[i]) ; --i);
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if( i != s.size()-1 )
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// there are some white characters at the end
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// we're starting from i+1 even when i==0 (there are some non white characters)
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s.erase(i+1, s.size() - i - 1);
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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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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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last_name += last_c;
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}
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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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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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last_value += last_c;
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}
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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::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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{
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ReadQuotedValue();
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}
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else
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{
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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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last_value += last_c;
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}
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}
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if( last_c == separator )
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last_c = GetChar();
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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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TrimWhiteChars(last_name);
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TrimWhiteChars(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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}
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} // namespace Winix
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