Linux, MySQL and server C++ apps

**badgers** · Jan 13th, 2003, 06:17 PM

I am interested in making a C++ program that runs on a linux web server. This will be a simple program that makes dynamic web pages, but does not use PHP.
my host, dreamhost.com allows C++ code and I am interested in learning how to do this.

I wonder if using compiled binary code will allow the web page respond faster or use less resources.

anyone ever done this, or know someone who has?
thank you for your time and have a good day

**JoshT** · Jan 14th, 2003, 12:01 PM

It's called CGI - your app writes the HTTP headers then HTML content to standard output and the web server sends it to the browser.

Compiled code can be fast, but the cost of creating an additional process can outweight the benefit from the addtional execution speed.

Code:

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

main() {
		char *chRM;
		char *chQS;

		chRM = getenv("HTTP_USER_AGENT");
		
		//check for NULL or we'll get at error with printf
		if (chRM == NULL) {
			chRM = "NONE";
		}

		chQS = getenv("QUERY_STRING");

		if (chQS == NULL) {
			chQS = "NONE";
		}

        printf("Content-type: text/html\n\n");
        printf("<html>\n");
		printf("<head><title>CGI Test</title></head>\n");
		printf("<body>\n");
        printf("<p>Hello World!\n");
		printf("<br><b>HTTP_USER_AGENT:</b> ");
		printf(chRM);
		printf("<br><b>QUERY_STRING:</b> ");
		printf(chQS);
		printf("</p>\n");
		printf("</body>\n");
        printf("</html>\n");
		return 0;
}

**badgers** · Jan 14th, 2003, 12:12 PM

thanks a ton
I appreciate your help

**badgers** · Jan 14th, 2003, 12:13 PM

is there any way to compile on windows that allows it to run on a linux box?

I want to try this while I'm in the office and I don't have linux here

**parksie** · Jan 14th, 2003, 12:18 PM

badgers - with a cross-compiler. I wasn't aware there were any for Windows though.

The code you were given was actually C, but it should make no real difference.

Depending on how your server is setup, it may be faster, it may be slower. For CGI, the main overhead is in the startup, so there'd be little difference between Perl and C, *however* Perl and PHP may be integrated into the server, resulting in almost zero overheads. This would make your C the slower option. If you have something that will run for a while (like a search or suchlike), it may be more efficient.

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