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PI3WEB.EXE
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CGI
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WViewEnv.c
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1997-10-23
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/*____________________________________________________________________________*\
*
Copyright (c) 1997 John Roy. All rights reserved.
These sources, libraries and applications are
FREE FOR COMMERCIAL AND NON-COMMERCIAL USE
as long as the following conditions are adhered to.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in
the documentation and/or other materials provided with the
distribution.
3. Redistributions of any form whatsoever and all advertising materials
mentioning features must contain the following
acknowledgment:
"This product includes software developed by John Roy
(http://www.johnroy.com/pi3/)."
THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHORS OR ITS CONTRIBUTORS BE LIABLE FOR ANY
DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
OF THE POSSIBILITY OF SUCH DAMAGE.
*____________________________________________________________________________*|
*
* $Source: WViewEnv.c$
* $Date: Sun Aug 10 06:41:31 1997$
*
Description:
Print environment and form input in Windows CGI.
Speaks HTTP/1.0
Also works on non-windows operating systems, but the implementation
of GetProfile...() is not efficient.
\*____________________________________________________________________________*/
/* $SourceTop:$ */
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
/*____________________________________________________________________________*\
*
Function:
Synopsis:
Description:
\*____________________________________________________________________________*/
void WriteEnv( FILE *fp, int iLen, char *pInput )
{
const char *pCurrent;
int iIndex;
fprintf( fp, "Content-Type: text/html\n");
fprintf( fp, "\n" );
fprintf( fp, "<HTML>\n");
fprintf( fp, "<TITLE>View CGI Environment</TITLE>\n");
fprintf( fp, "<BODY>\n");
fprintf( fp, "<H2>View CGI Environment</H2>\n");
fprintf( fp, "<BR>Stdin data length:<BR><B>%d</B><BR>\n", iLen );
if ( iLen>0 && pInput )
{
fprintf( fp, "<BR>Stdin data:<BR><B>%s</B><BR>\n", pInput );
};
#if 0
fprintf( fp, "<BR>Environment variables follow:<BR>\n");
fprintf( fp, "<BR><B>\n");
for( iIndex = 0; ; iIndex++ )
{
pCurrent = _environ[iIndex];
if ( !pCurrent ) { break; };
fprintf( fp, "<CODE>%s</CODE><BR>\n", pCurrent );
};
#endif
fprintf( fp, "<BR></B>\n");
fprintf( fp, "</BODY>\n");
}
#if (WIN32)
/*
** Windows environment, use real version of ::GetPrivateProfileString()
*/
# define MyGetPrivateProfileString(a,b,c,d,e,f) \
GetPrivateProfileString(a,b,c,d,e,f)
# include <windows.h>
#else
/*
** Not a windows environment. Use the super efficient, non-caching-
** -reopen-and-close-the-file-every-time version
*/
/*____________________________________________________________________________*\
*
Function:
Synopsis:
Description:
Inefficent lookup of values in a profile file
\*____________________________________________________________________________*/
int MyGetPrivateProfileString(
const char *pSection,
const char *pKey,
const char *pDefault,
char *pszBuffer,
int iBufferSize,
const char *pFileName )
{
FILE *fp = 0;
int iCorrectSection = 0; /* is current section the correct one ? */
assert( pSection && pKey && pszBuffer && iBufferSize && pFileName );
if ( !pFileName || !*pFileName )
{ goto done; };
fp = fopen( pFileName, "r" );
if ( fp )
{
enum { BUF_SIZE=1023 };
char szBuf[BUF_SIZE+1];
char *pS = fgets( szBuf, BUF_SIZE, fp );
szBuf[BUF_SIZE]='\0';
for( ; pS!=NULL ; pS = fgets( szBuf, BUF_SIZE, fp ) )
{
int i, j, k;
for( i=0; pS[i] && (isspace(pS[i])); i++); /* no leading space */
k = strlen( pS )-1;
for( j=k ; j>=0 && (isspace(pS[j])); j--); /* no trailing space */
if ( j < k )
{ pS[j+1]='\0'; }; /* terminate line */
/*
** The segment (pS[i]..pS[j]) is the interesting part of the string
*/
/*
** section begins with '[' and ends with ']'
*/
if ( (j-i)<2 ) { goto key_value_line; };
if ( pS[i]!='[' || pS[j]!=']' ) { goto key_value_line; };
i++; j--;
/*
** match section name
*/
if ( (j>i) && !strncmp( &(pS[i]), pSection, j-i ) )
{ iCorrectSection = 1; }
else
{ iCorrectSection = 0; };
continue;
key_value_line:
if ( iCorrectSection )
{
/* --- attempt to match key --- */
for( i=0; pS[i] && (isspace(pS[i])); i++); /* remove leading */
if ( pS[i]==';' ) { continue; }; /* comment line */
for( j=i; pS[j] && pS[j]!='='; j++);/* find '=' */
if ( pS[j] )
{
if ( (j>i) && !strncmp( &(pS[i]), pKey, j-i ) )
{
j++;
strncpy( pszBuffer, &(pS[j]), iBufferSize );
return 1;
}; /* key matches */
}; /* section matches */
}; /* loop through lines in file */
}; /* opened file */
fclose( fp );
};
done:
if ( pDefault )
{ strncpy( pszBuffer, pDefault, iBufferSize ); };
return 1;
}
#endif
/*____________________________________________________________________________*\
*
Function:
Synopsis:
Description:
\*____________________________________________________________________________*/
int main( int iArgc, const char *ppArgv[] )
{
FILE *fp = 0;
int iRet = 0;
int iInLen;
char *pInputData = 0;
enum { BUF_LEN=511 };
char szBuf[BUF_LEN+1];
szBuf[BUF_LEN]='\0';
if ( iArgc<2 )
{
fprintf( stderr, "WViewEnv: bad arguments.\n" );
return -1;
};
/* --- get output filename --- */
MyGetPrivateProfileString( "System", "Output File", "", szBuf, BUF_LEN,
ppArgv[1] );
/* --- and open it --- */
if ( !*szBuf )
{
fprintf( stderr, "WViewEnv: could not get output filename" );
iRet = -1; goto done;
};
fp = fopen( szBuf, "w" );
if ( !fp )
{
perror( "WViewEnv: could not open output file" );
iRet = -1; goto done;
};
MyGetPrivateProfileString( "CGI", "Content Length", "", szBuf, BUF_LEN,
ppArgv[1] );
iInLen = atoi( szBuf );
/*
** Allocate buffer for data
*/
if ( iInLen>0 )
{ pInputData = (char *)malloc( iInLen+1 ); };
/*
** Read data
*/
if ( pInputData )
{
FILE *ifp;
MyGetPrivateProfileString( "System", "Content File", "", szBuf,
BUF_LEN, ppArgv[1] );
if ( !*szBuf )
{
fprintf( stderr, "WViewEnv: could not get content filename" );
iRet = -1; goto done;
};
ifp = fopen( szBuf, "r" );
if ( !ifp )
{
perror( "WViewEnv: could not open input file" );
iRet = -1; goto done;
};
iInLen = fread( pInputData, sizeof( char ), iInLen, ifp );
pInputData[iInLen] = '\0';
fclose( ifp );
};
WriteEnv( fp, iInLen, pInputData );
done:
if ( pInputData ) { free( pInputData ); };
fclose( fp );
return iRet;
}