Running C code using FastCGI & NGINX - c

Question

I am trying to run C code using FastCGI and NGINX. Right now, after following all the steps in this website: http://chriswu.me/blog/writing-hello-world-in-fcgi-with-c-plus-plus/
I am at the step where I am about to spawn-fcgi. However, the system that I must use is a 32 bit system where commands such as sudo apt-get install are not supported. I tried copying over the spawn-fcgi binary from my 64 bit system and tried using that like this: ./spawn-fcgi -p 8000 -n hello_world command but it is giving me an error saying it cannot execute the binary file (I'm assuming it is because I am for sure on a 32 bit system when trying to use it). In fact, when I executed file spawn-fcgi it told me that it was a 64-bit LSB executable, and as I am running it on a 32-bit system, that's why the "Cannot execute binary file" error is there.
What I'm wondering is if there is anyway I could run a C script using FASTCGI without calling on spawn-fcgi or cgi-fcgi or if there is anyway I could use somehow get these binaries in 32-bit. I tried searching online for 32-bit downloads of FASTCGI but it seems like fastcgi.com is broken as I am unable to access the website.
Please let me know if I've left out any crucial information and I'll be glad to provide it. Thanks!

Answer 1

By using the API provided by <fcgiapp.h> header, you can specify the socket details, which spawning via external means does for you.
You can get a TCP socket file descriptor like this:
int sockfd = FCGX_OpenSocket("127.0.0.1:9000", 100);
...or using Unix sockets:
int sockfd = FCGX_OpenSocket("/var/run/fcgi.sock", 100);
With the socket you can then:
FCGX_Request req;
FCGX_InitRequest(&req, sockfd, 0);
while (FCGX_Accept_r(&req) >= 0) {
FCGX_FPrintF(req.out, "Content-Type: text/html\n\n");
FCGX_FPrintF(req.out, "hello world");
FCGX_Finish_r(&req);
}
Once you compile, you can execute the binary directly without using spawn-fcgi or cgi-fcgi.