You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
winix/winixd/core/httpsimpleparser.cpp

274 lines
4.8 KiB

/*
* This file is a part of Winix
* and is distributed under the 2-Clause BSD licence.
* Author: Tomasz Sowa <t.sowa@ttmath.org>
*/
/*
* Copyright (c) 2008-2021, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "httpsimpleparser.h"
#include "misc.h"
#include "utf8/utf8.h"
namespace Winix
{
void HttpSimpleParser::ToLower(std::wstring & s)
{
for(wchar_t & c : s)
{
if( c>='A' && c<='Z' )
c = c - 'A' + 'a';
}
}
bool HttpSimpleParser::IsWhite(int c)
{
if( c==' ' || c=='\t' )
return true;
return false;
}
void HttpSimpleParser::SkipWhiteChars()
{
while( IsWhite(last_c) )
last_c = GetChar();
}
int HttpSimpleParser::ParseHalfHex(int c)
{
if( c>='a' && c<='z' )
c += 'A' - 'a'; // to upper case
if( c >= 'A' )
c = c - 'A' + 10;
else
c = c - '0';
c &= 0xf;
return c;
}
void HttpSimpleParser::CheckSpecialChar()
{
if( last_c == '%' )
{
int c1 = GetChar();
int c2 = GetChar();
if( c1==-1 || c2==-1 )
{
last_c = -1;
}
else
{
c1 = ParseHalfHex(c1);
c2 = ParseHalfHex(c2);
last_c = (c1 << 4) + c2;
}
}
else
if( last_c == '+' )
{
last_c = ' ';
}
}
void HttpSimpleParser::ReadName()
{
// we're checking 'separator' and '=' because the string is allowed not having '=' (the value is optional)
utf8_token.clear();
last_name.clear();
for( ; last_c!=-1 && last_c!=separator && last_c!='=' ; last_c = GetChar() )
{
if( recognize_special_chars )
CheckSpecialChar();
if( last_c != -1 )
{
if( getchar_returns_utf8_chars )
utf8_token += last_c;
else
last_name += last_c;
}
}
if( getchar_returns_utf8_chars )
pt::utf8_to_wide(utf8_token, last_name);
if( last_c == '=' )
last_c = GetChar();
}
void HttpSimpleParser::ReadQuotedValue()
{
// skipping '"'
last_c = GetChar();
utf8_token.clear();
last_value.clear();
for( ; last_c!=-1 && last_c!='"' ; last_c = GetChar() )
{
if( recognize_special_chars )
CheckSpecialChar();
if( last_c != -1 )
{
if( getchar_returns_utf8_chars )
utf8_token += last_c;
else
last_value += last_c;
}
}
if( getchar_returns_utf8_chars )
pt::utf8_to_wide(utf8_token, last_value);
if( last_c == '"' )
last_c = GetChar();
// looking for a separator (skipping)
for( ; last_c!=-1 && last_c!=separator ; last_c = GetChar() );
}
void HttpSimpleParser::ReadNormalValue()
{
utf8_token.clear();
last_value.clear();
for( ; last_c!=-1 && last_c!=separator ; last_c = GetChar() )
{
if( recognize_special_chars )
CheckSpecialChar();
if( last_c != -1 )
{
if( getchar_returns_utf8_chars )
utf8_token += last_c;
else
last_value += last_c;
}
}
if( getchar_returns_utf8_chars )
pt::utf8_to_wide(utf8_token, last_value);
}
void HttpSimpleParser::ReadValue()
{
if( skip_white_chars )
SkipWhiteChars();
if( value_can_be_quoted && last_c == '"' )
ReadQuotedValue();
else
ReadNormalValue();
if( last_c == separator )
last_c = GetChar();
}
/*
* there can be some important values like passwords so its better
* to clear them now
*/
void HttpSimpleParser::Clear()
{
Overwrite(last_name);
Overwrite(last_value);
Overwrite(utf8_token);
last_name.clear();
last_value.clear();
utf8_token.clear();
}
void HttpSimpleParser::Parse()
{
for( last_c = GetChar() ; last_c != -1 ; )
{
last_name.clear();
last_value.clear();
if( read_name )
ReadName();
ReadValue();
if( skip_white_chars )
{
TrimWhite(last_name);
TrimWhite(last_value);
}
Parameter(last_name, last_value); // user definied function
}
Clear();
}
} // namespace Winix