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rpcs3/Utilities/LUrlParser.cpp
2021-04-11 14:01:51 +03:00

264 lines
6.1 KiB
C++

/*
* Lightweight URL & URI parser (RFC 1738, RFC 3986)
* https://github.com/corporateshark/LUrlParser
*
* The MIT License (MIT)
*
* Copyright (C) 2015 Sergey Kosarevsky (sk@linderdaum.com)
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include "LUrlParser.h"
#include <algorithm>
#include <cstring>
#include <cstdlib>
// check if the scheme name is valid
static bool IsSchemeValid( const std::string& SchemeName )
{
return std::all_of(SchemeName.cbegin(), SchemeName.cend(), [](const auto& c)
{
return isalpha(c) || c == '+' || c == '-' || c == '.';
});
}
bool LUrlParser::clParseURL::GetPort( int* OutPort ) const
{
if ( !IsValid() ) { return false; }
const int Port = atoi( m_Port.c_str() );
if ( Port <= 0 || Port > 65535 ) { return false; }
if ( OutPort ) { *OutPort = Port; }
return true;
}
// based on RFC 1738 and RFC 3986
LUrlParser::clParseURL LUrlParser::clParseURL::ParseURL( const std::string& URL )
{
LUrlParser::clParseURL Result;
const char* CurrentString = URL.c_str();
/*
* <scheme>:<scheme-specific-part>
* <scheme> := [a-z\+\-\.]+
* For resiliency, programs interpreting URLs should treat upper case letters as equivalent to lower case in scheme names
*/
// try to read scheme
{
const char* LocalString = strchr( CurrentString, ':' );
if ( !LocalString )
{
return clParseURL( LUrlParserError_NoUrlCharacter );
}
// save the scheme name
Result.m_Scheme = std::string( CurrentString, LocalString - CurrentString );
if ( !IsSchemeValid( Result.m_Scheme ) )
{
return clParseURL( LUrlParserError_InvalidSchemeName );
}
// scheme should be lowercase
std::transform( Result.m_Scheme.begin(), Result.m_Scheme.end(), Result.m_Scheme.begin(), ::tolower );
// skip ':'
CurrentString = LocalString+1;
}
/*
* //<user>:<password>@<host>:<port>/<url-path>
* any ":", "@" and "/" must be normalized
*/
// skip "//"
if ( *CurrentString++ != '/' ) return clParseURL( LUrlParserError_NoDoubleSlash );
if ( *CurrentString++ != '/' ) return clParseURL( LUrlParserError_NoDoubleSlash );
// check if the user name and password are specified
bool bHasUserName = false;
const char* LocalString = CurrentString;
while ( *LocalString )
{
if ( *LocalString == '@' )
{
// user name and password are specified
bHasUserName = true;
break;
}
else if ( *LocalString == '/' )
{
// end of <host>:<port> specification
bHasUserName = false;
break;
}
LocalString++;
}
// user name and password
LocalString = CurrentString;
if ( bHasUserName )
{
// read user name
while ( *LocalString && *LocalString != ':' && *LocalString != '@' ) LocalString++;
Result.m_UserName = std::string( CurrentString, LocalString - CurrentString );
// proceed with the current pointer
CurrentString = LocalString;
if ( *CurrentString == ':' )
{
// skip ':'
CurrentString++;
// read password
LocalString = CurrentString;
while ( *LocalString && *LocalString != '@' ) LocalString++;
Result.m_Password = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
}
// skip '@'
if ( *CurrentString != '@' )
{
return clParseURL( LUrlParserError_NoAtSign );
}
CurrentString++;
}
bool bHasBracket = ( *CurrentString == '[' );
// go ahead, read the host name
LocalString = CurrentString;
while ( *LocalString )
{
if ( bHasBracket && *LocalString == ']' )
{
// end of IPv6 address
LocalString++;
break;
}
else if ( !bHasBracket && ( *LocalString == ':' || *LocalString == '/' ) )
{
// port number is specified
break;
}
LocalString++;
}
Result.m_Host = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
// is port number specified?
if ( *CurrentString == ':' )
{
CurrentString++;
// read port number
LocalString = CurrentString;
while ( *LocalString && *LocalString != '/' ) LocalString++;
Result.m_Port = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
}
// end of string
if ( !*CurrentString )
{
Result.m_ErrorCode = LUrlParserError_Ok;
return Result;
}
// skip '/'
if ( *CurrentString != '/' )
{
return clParseURL( LUrlParserError_NoSlash );
}
CurrentString++;
// parse the path
LocalString = CurrentString;
while ( *LocalString && *LocalString != '#' && *LocalString != '?' ) LocalString++;
Result.m_Path = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
// check for query
if ( *CurrentString == '?' )
{
// skip '?'
CurrentString++;
// read query
LocalString = CurrentString;
while ( *LocalString && *LocalString != '#' ) LocalString++;
Result.m_Query = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
}
// check for fragment
if ( *CurrentString == '#' )
{
// skip '#'
CurrentString++;
// read fragment
LocalString = CurrentString;
while ( *LocalString ) LocalString++;
Result.m_Fragment = std::string( CurrentString, LocalString - CurrentString );
CurrentString = LocalString;
}
Result.m_ErrorCode = LUrlParserError_Ok;
return Result;
}