>>When communicating with a web page, I am unable to get the values from a GET or POST action method. In C, if you use getenv, you can retrieve QUERY_STRING, and other form variables. You can pass parameters from a web page directly to a C program. You can also send a printf directly to the standard output, these string outputs will be directed to a new web page.
>>
>>Why is FoxPro unable to see these same parameters? Is there a way to send text directly like C does?
>>
>>Dan
>
>I am unclear on how you are "communicating with a web page"... Can you give more details?


Using C, you could use the "POST" action form method you can call a program directly.

FORM METHOD="POST" ACTION="http://dcummings/cStuff/POST_QUERY.exe"

Below is the c program that is called.
The getenv is used to retrieve information from the form, such as the CONTENT_LENGTH and the REQUEST_METHOD.

The printf is printing to what is called the stdout ( standard output ). In this case it prints directly to a new web page.

I was looking for a way to do that directly with FoxPro. Rick Strahl in WestWind, uses a DLL. I believe it's written in C. It processes the information and creates an ascii file. Meanwhile, a foxpro app, running in the background has a timer which keeps checking for the existence of a specific file. Once the file is found, the FoxPro app reads in the information and generates a new page.

I was hoping there was a way to bypass this middle step using the DLL.

Maybe communicating with the web page was not the right wording.


Some of the code had to be altered to prevent the HTML display.

#include <stdio.h>
#ifndef NO_STDLIB_H
#include <stdlib.h>
#else

char *getenv();

#endif
#include <string.h>

#define MAX_ENTRIES 10000

typedef struct {
    char *name;
    char *val;
} entry;

char *makeword(char *line, char stop);
char *fmakeword(FILE *f, char stop, int *len);
char x2c(char *what);
void unescape_url(char *url);
void plustospace(char *str);


void main(int argc, char *argv[]) {
    entry entries[MAX_ENTRIES];
    register int x,m=0;
    int cl;

    printf("Content-type: text/html%c%c",10,10);

    if(strcmp(getenv('REQUEST_METHOD'),'POST')) {
        printf('This script should be referenced with a METHOD of POST.\n');
        printf('If you don't understand this, see this ');
        printf('<A HREF=\'http://www.ncsa.uiuc.edu/SDG/Software/Mosaic/Docs/fill-out-forms/overview.html\'>forms overview</A>.%c',10);
        exit(1);
    }
    if(strcmp(getenv('CONTENT_TYPE'),'application/x-www-form-urlencoded')) {
        printf('This script can only be used to decode form results. \n');
        exit(1);
    }
    cl = atoi(getenv('CONTENT_LENGTH'));

    for(x=0;cl && (!feof(stdin));x++) {
        m=x;
        entries(x).val = fmakeword(stdin,'&',&cl);
        plustospace(entries(x).val);
        unescape_url(entries(x).val);
        entries(x).name = makeword(entries(x).val,'=');
    }
    printf('<' + 'H1>Query Results<' + '/H1>');
    printf('You submitted the following name/value pairs:<' + 'p>' + '%c',10);
    printf('<' + 'ul>' + '%c',10);

    for(x=0; x <= m; x++)
        printf('<li' + '>' + '<code>%s = %s</code>%c',entries(x).name,
               entries(x).val,10);

    printf('<' + '/ul>' + '%c',10);

}