Url编解码类

CUrlEncode.h

#pragma once

#include <xstring>
#include <string>

//url编码类
class CUrlEncode
{
public:
	void StringToWstring(std::wstring& szDst, std::string str)
	{
		std::string temp = str;
		int len = MultiByteToWideChar(CP_ACP, 0, (LPCSTR)temp.c_str(), -1, NULL, 0);
		wchar_t * wszUtf8 = new wchar_t[len + 1];
		memset(wszUtf8, 0, len * 2 + 2);
		MultiByteToWideChar(CP_ACP, 0, (LPCSTR)temp.c_str(), -1, (LPWSTR)wszUtf8, len);
		szDst = wszUtf8;
		std::wstring r = wszUtf8;
		delete[] wszUtf8;
	}

	static std::string EscapeURL(const WCHAR* wszUrl)
	{
		int nNeedLen = WideCharToMultiByte(CP_UTF8, 0, wszUrl, -1, NULL, 0, NULL,NULL);
		char* pszUrl = new char[nNeedLen + 1];
		if (pszUrl == NULL)
			return NULL;
		ZeroMemory(pszUrl, nNeedLen + 1);	
		WideCharToMultiByte(CP_UTF8, 0, wszUrl, -1, pszUrl, nNeedLen, NULL,NULL);

		std::string result = "";
		for ( unsigned int i=0; i<strlen(pszUrl); i++ )
		{
			char c = pszUrl[i];
			if (
				( '0'<=c && c<='9' ) ||
				( 'a'<=c && c<='z' ) ||
				( 'A'<=c && c<='Z' ) ||
				c=='/' || c=='.'
				) 
			{
				result += c;
			} 
			else 
			{
				int j = (short int)c;
				if ( j < 0 ) 
				{
					j += 256;
				}
				int i1, i0;
				i1 = j / 16;
				i0 = j - i1*16;
				result += '%';
				result += dec2hexChar(i1);
				result += dec2hexChar(i0);
			}
		}
		delete []pszUrl;
		return result;
	}

	static std::wstring DescapeURL(const char* URL) {	

		std::string result = "";
		unsigned int nUrlLen = strlen(URL);
		for ( unsigned int i=0; i< nUrlLen; i++ ) {
			char c = URL[i];
			if ( c != '%' ) {
				result += c;
			} else {
				char c1 = URL[++i];
				char c0 = URL[++i];
				int num = 0;
				num += hexChar2dec(c1) * 16 + hexChar2dec(c0);
				result += char(num);
			}
		}
		int nRet = MultiByteToWideChar(CP_UTF8, 0, result.c_str(), -1, NULL, 0);
		WCHAR* pWszParam = new WCHAR[nRet + 1];
		if (pWszParam == NULL)
			return NULL;
		ZeroMemory(pWszParam, sizeof(WCHAR) * (nRet + 1));
		nRet = MultiByteToWideChar(CP_UTF8, 0, result.c_str(), -1, pWszParam, nRet);
		std::wstring wstrRet = pWszParam;
		delete []pWszParam;
		return wstrRet;
	}
private:
	static char dec2hexChar(short int n) 
	{
		if ( 0 <= n && n <= 9 ) 
		{
			return char( short('0') + n );
		}
		else if ( 10 <= n && n <= 15 ) 
		{
			return char( short('A') + n - 10 );
		} 
		else 
		{
			return char(0);
		}
	}
	static short int hexChar2dec(char c) 
	{
		if ( '0'<=c && c<='9' ) 
		{
			return short(c-'0');
		}
		else if ( 'a'<=c && c<='f' ) 
		{
			return ( short(c-'a') + 10 );
		}
		else if ( 'A'<=c && c<='F' ) 
		{
			return ( short(c-'A') + 10 );
		} 
		else 
		{
			return -1;
		}
	}
};