Demo

Demostration of GuestBook Applet.

Note: Demo not fully functional.

Description

This applet allows a visitor of page to add an entry to the guestbook. This entry is send to the through the applet, which uses a CGI help it write the entry to the guestbook database as a HTML document. This applet requires a CGI which only performs the process of taking a string and writing it to a file. For my particular applet, I have written the CGI in C which is similar to the one below: 

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

void main(int argc, char *argv[]) { 
	FILE *fp; char *method; 
	char line[BUFSIZ];    

	printf("Content-type: text/html\n\n"); 

	if ((fp = fopen(argv[1], argv[2])) == NULL) { 
		printf("Can't open the file %s with mode [%s]\n", argv[1], argv[2]);    
		exit(EXIT_FAILURE); 
	} 

	method = getenv("REQUEST_METHOD"); 

	if (method == NULL) { 
		printf("Use POST method with HTML form.\n"); 
		exit(EXIT_FAILURE); 
	} 
	else if (strcmp(method, "POST") == 0 || strcmp(method, "GET") == 0) { 
		while(!feof(stdin)) { 
			fgets(line, sizeof(line), stdin); 
			fprintf(fp, "%s", line); 
			fflush(fp); 
		} 
	}    

	fclose(fp); 
}

Usage/Parameters

cgi The CGI which writes the data the HTML document.
guestPath The directory and name of where the guestbook file is location in the server.
guestURL The URL of the guestbook.

Example

Here is an example of the HTML source code for embedding this applet: 

    <applet archive="GuestBook.jar" code="GuestBook.class" codebase="classes" width="400" height="250"> 
	<param name="cgi" value="cgi-bin/writefile.cgi">    
	<param name="guestPath" value="guestbookdemo.html"> 
	<param name="guestURL" value="guestbookdemo.html"> 
    </applet>

Version Updates

None

Download

Download this applet now. (source code included)