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dsCGI.h

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/* 
 * $Id: dsCGI.h,v 1.9 2004/07/29 07:55:11 dsamersoff Exp $
 */

#ifndef dsCGI_h
#define dsCGI_h 

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif


#include <string.h>
#include <stdio.h>
#include <stdlib.h>

#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif

#ifdef HAVE_IO_H
# include <io.h>
#endif

#include <dsSmartException.h>
#include <dsutil.h>
#include <dsHashTable.h>

#define MS_MAGIC   "u04"
#define MS_OFFSET  0xB0

DECLARE_EXCEPTION(cgi);


class dsCGI
{
    dsHashTable *_ht;
    dsHashTable *_ht_cookie;

    char *_post_data;


    void decode(const char *src, int len, std::ostream& os);

public: 

    dsCGI();
    dsCGI(const char *src);
    ~dsCGI();

    void parseQueryString( const char *query_string );
    void parseCookie( const char *cookie );


    void content_header(const char *mime = "text/html");

    const char *postData();

    char *seek(const char *key);
    char *seek_cookie(const char *key);

    char * getstring(const char *key);
    long getlong(const char *key);

    char * getstring(const char *key, char *defval);
    long getlong(const char *key, long defval);

    int operator !(){ return (int) !getenv( "GATEWAY_INTERFACE" ); }

    const char *pathInfo();
    
    const char *scriptName();
    
};

inline const char *dsCGI::postData()
{
    return (const char *)_post_data;
}

inline  const char *dsCGI::pathInfo()
{
    const char *s;
    if (! (s= getenv("PATH_INFO")))
            throw cgiException("Environment var PATH_INFO is not set");

   return s;
}

inline  const char *dsCGI::scriptName()
{
    const char *s;
    if (! (s= getenv("SCRIPT_NAME")))
            throw cgiException("Environment var PATH_INFO is not set");

   return s;
}

inline char *dsCGI::seek(const char *key)
{
    return _ht->seek(key);
}

inline char *dsCGI::seek_cookie(const char *key)
{
    return _ht_cookie->seek(key);
}

inline char *dsCGI::getstring(const char *key)
{ 
    char *sp;
    if ( !(sp = _ht->seek(key)) && 
         !(sp = _ht_cookie->seek(key)) 
       )
       throw cgiException("Key '%s' not defined",key);

     return sp;
}

inline char *dsCGI::getstring(const char *key, char *defval)
{  
    char *sp;
    if ( !(sp = _ht->seek(key)) )
         sp = _ht_cookie->seek(key);

    return (sp) ? sp : defval;
}

inline long dsCGI::getlong(const char *key)
{ 
    char *sp;
    if ( !(sp = _ht->seek(key)) && 
         !(sp = _ht_cookie->seek(key)) 
       )
       throw cgiException("Key '%s' not defined",key);

     return atol(sp);
}

inline long dsCGI::getlong(const char *key, long defval)
{  
    char *sp;
    if ( !(sp = _ht->seek(key)) )
         sp = _ht_cookie->seek(key);

    return (sp) ? atol(sp) : defval;
}

class dsHtmlElements
{
public:
    void form(std::ostream& os, char *name, char *method, char *action);
    void formClose(std::ostream& os);

    void table(std::ostream& os, int spacing = 0, int padding = 0, int border = 0);
    void tableClose(std::ostream& os);

    void hidden(std::ostream& os, char *name, char *value);
    void input(std::ostream& os, char *label, char *name, char *invalue = "");
    void combo(std::ostream& os, char *label, char *name, char *optlist, char *selected="");
    void text(std::ostream& os, char *label, char *name, char *invalue = "");

    void submit(std::ostream& os, char *text, char *name="submit");
};

inline void dsHtmlElements::form(std::ostream& os, char *name, char *method, char *action)
{
   os << "<FORM name=\"" << name << "\" method=\"" << method << "\" action=\"" << action << "\">" << std::endl;
}

inline void dsHtmlElements::formClose(std::ostream& os)
{
   os << "</FORM>"<< std::endl;
}

inline void dsHtmlElements::table(std::ostream& os, int spacing, int padding, int border)
{
   os << "<TABLE border=\"" << border << "\" cellspacing=\"" << spacing << "\" cellpadding=\"" << padding << "\">" << std::endl;
}

inline void dsHtmlElements::tableClose(std::ostream& os)
{
   os << "</TABLE>"<< std::endl;
}

inline void dsHtmlElements::hidden(std::ostream& os, char *name, char *value)
{
   os << "<INPUT type=\"hidden\" name=\"" << name << "\" value=\"" << value << "\">" << std::endl;
}

inline void dsHtmlElements::input(std::ostream& os, char *label, char *name, char *invalue)
{
   os << "<TR><TD>" << label << "</TD><TD>";
   os << "<INPUT type=\"text\" name=\"" << name << "\" value=\"" << invalue << "\">";
   os << "</TD></TR>" << std::endl;
}

inline void dsHtmlElements::combo(std::ostream& os, char *label, char *name, 
                    char *optlist, char *selected)
{
    os << "<TR><TD>" << label << "</TD><TD>";
    os << "<SELECT name=\"" << name << "\">" << std::endl;

    char *s = optlist, *e, *p;

    while(*s)
    {
        e = strchr(s,';');  
        if (!e)
            e = s + strlen(s)-1;

        if ( (p = ds_strnchr(s,'=',e-s)) )
        {
            os << "<OPTION value=\"";
            os.write(p+1, e-p-1); // value
            os << "\"";

            if ( strncmp(s, selected, p-s)  == 0)
            {
                os << " selected ";
            }

            os << ">";
            os.write(s,p-s);  // key
            os << "</OPTION>" << std::endl; 
        }
        else
        {   
            os << "<OPTION value=\"";
            os.write(s, e-s); // key as option
            os << "\"";

            if ( strncmp(s, selected, e-s)  == 0)
            {
                os << " selected ";
            }

            os << ">";
            os.write(s,e-s);     // key
            os << "</OPTION>" << std::endl; 
        }
          
         s = e+1;
    }

    os << "</TD></TR>" << std::endl;
}

inline void dsHtmlElements::text(std::ostream& os, char *label, char *name, char *invalue)
{
   os << "<TR><TD>" << label << "</TD><TD>";
   os << "<TEXTAREA name=\"" << name << "\">" << invalue << "</TEXTAREA>";
   os << "</TD></TR>" << std::endl;
}

inline void dsHtmlElements::submit(std::ostream& os, char *text, char *name)
{
   os << "<TR><TD colspan=2 align=center>";
   os << "<INPUT type=\"submit\" name=\"" << name << "\" value=\"" << text << "\">";
   os << "</TD><TD>&nbsp;</TD></TR>" << std::endl;
}

#endif

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