Re: [help-cgicc] add: escapeString()

[Quintin Connell]

This is my version of this very useful function that should be included as part 
of the cgicc library.

STDNS string
CGICCNS escapeString(const STDNS string& src)
{
   STDNS string result;
   STDNS string::const_iterator iter;

   for (iter = src.begin(); iter != src.end(); ++iter) {
      if (isalnum(*iter) || (*iter == '*') || (*iter == '@') || (*iter == '-') 
      || (*iter == '_') || (*iter == '+') || (*iter == '.') || (*iter == '/')) {
            result.append(1, *iter);
      }
      else {
         result.append("%");
         result.append(charToHex(*iter));
      }
   }
   return result;
}

Note the standard function isalnum() does the same job as your is_save() 
function. The list of characters that i include not to be encoded i got from 
somewhere, i'm sure in the HTTP 1.1 RFC but i can't find a reference to it at 
the moment. But i think the point is that not all non alphanumeric characters 
need to be encoded. Maybe someone out there can shed light on this point.

Quintin


Quoting Karl Pitrich <address@hidden>:

> hi,
> 
> i added a _simple_ escapeString() to CgiUtils.cpp, maybe it is usefult
> to someone else. 
> as it is really not much code, i paste it plainly instead of a diff.
> 
> / karl
> 
> 
> static const char *hex_chars = "0123456789ABCDEF";
> 
> static bool is_save(char c) {
>   if((c >= '0' && c <= '9')
>     || (c >= 'A' && c <= 'Z')
>     || (c >= 'a' && c <= 'z'))
>     return true;
>   return false;
> }
> 
> STDNS string
> CGICCNS escapeString(const STDNS string& src)
> {
>   STDNS string result;
>   STDNS string::const_iterator iter;
> 
>   for(iter = src.begin(); iter != src.end(); ++iter) {
>     if(is_save(*iter)) {
>       result.append(1, *iter);
>     } else {
>       result.append(1, '%');
>       result.append(1, hex_chars[*iter >> 4]);
>       result.append(1, hex_chars[*iter & 15]);
>     }
>   }
>   return result;
> }
> 
> 
> -- 
> Karl Pitrich [GCS C+++ L UL+++ L++++ P--- E--- w--- PGP++ t+++]
> doin' the Linux at
> Fabasoft R&D Software GmbH & Co KG, Linz, Austria
> 
>