UrlEncode UrlDecode

最新推荐文章于 2021-07-14 19:11:05 发布

harry330

最新推荐文章于 2021-07-14 19:11:05 发布

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分类专栏： MFC 文章标签： null string delete buffer url c

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URL编码、解码

string URLDecode(string &strSrc)
{
string buffer = "";
int len = strSrc.length();

for (int i = 0; i < len; i++)
{
      int j = i ;
      char ch = strSrc.at(j);
      if (ch == '%')
   {
char tmpstr[] = "0x0__";
int chnum;
tmpstr[3] = strSrc.at(j+1);
tmpstr[4] = strSrc.at(j+2);
chnum = strtol(tmpstr, NULL, 16);
buffer += chnum;
i += 2;
      }
   else if(ch == '+')
   {
    buffer += ' ';
   }
   else
   {
buffer += ch;
      }
   }

   len=MultiByteToWideChar(CP_UTF8, 0, buffer.c_str (), -1, NULL,0);
    WCHAR * wszUtf8 = new WCHAR[len+1];
if( wszUtf8 == NULL )
{
strSrc = "";
return strSrc;
}
    memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_UTF8, 0, buffer.c_str (), -1, wszUtf8, len);

len = WideCharToMultiByte(CP_ACP, 0, wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8=new char[len + 1];
if( szUtf8 == NULL )
{
delete[] wszUtf8;
strSrc = "";
return strSrc;
}
memset(szUtf8, 0, len + 1);
WideCharToMultiByte (CP_ACP, 0, wszUtf8, -1, LPSTR(szUtf8), len, NULL,NULL);

strSrc = szUtf8;
delete[] szUtf8;
delete[] wszUtf8;

return strSrc;
}

string URLEncode(string &strSrc)
{
int len=MultiByteToWideChar(CP_ACP, 0, strSrc.c_str (), -1, NULL,0);
WCHAR * wszUtf8 = new WCHAR[len+1];
if( wszUtf8 == NULL )
{
strSrc = "";
return strSrc;
}
memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_ACP, 0, strSrc.c_str (), -1, wszUtf8, len);

len = WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8=new char[len + 1];
if( wszUtf8 == NULL )
{
delete[] wszUtf8;
strSrc = "";
return strSrc;
}
memset(szUtf8, 0, len + 1);
WideCharToMultiByte (CP_UTF8, 0, wszUtf8, -1, LPSTR(szUtf8), len, NULL,NULL);

szUtf8[len]=0;
string strResult = szUtf8;

char num[4];

//处理特殊字符，转化为%ASCII码的形式，‘ ’转为‘+’
string::size_type index1 = 0 ;
while ( (index1 =strResult.find_first_of( "/"< >%//^[]`+$,@:;/!#?=&", index1)) != string::npos )
{
memset( num, 0, sizeof(num) );

if( strResult[index1]==' ')
{
   num[0] = '+';
   strResult.replace (index1, 1, num);
   index1+=1;
   continue;
}
sprintf_s( num, "%c%2x", '%', (strResult[index1]&255 ));
strResult.replace (index1, 1, num);
index1+=3;
}

strSrc ="";
for(unsigned i=0;i<strResult.length ();i++)
{
memset( num, 0, sizeof(num) );
strResult[i]&=255;
if( strResult[i] <= 32 || strResult[i]>= 123 )
{
   strSrc+='%';
   sprintf_s( num, "%2x", strResult[i]&255 );
   strSrc+=num;
}
else
{
   strSrc+=strResult[i];
}
}