Developing a lightweight, hi-performance and dynamic JSON

api server with C

Shaikh Sonny Aman for

SQABD LT4

Background

Play Tools

PHP Java Python C

WHY!!

Requirement

http://myserver.com:8080?mod=score&action=get_score&id=123

{score:4,id:123

}

The Server

if ( (client_socket=accept(server_socket, (struct sockaddr *)&cad, &alen)) < 0) {

printf("accept failed\n");exit (1);

}pthread_create(&tid, NULL, serverthread, (void*)client_socket );

While(1){

}

accept connection from clientrun a thread to process

Processing Request

Read all available data

recv(client_socket, buffer,buffer_size, 0);

Processing Request

Host: www.http.header.free.frAccept: image/gif, image/x-xbitmap, image/jpeg, imagepjpeg,Accept-Language: FrAccept-Encoding: gzip, deflate

Get the request params

mod=score&action=get_score&id=123GET: Http1.1

Calling Dynamic Function

PIC : Position Independent Code

dlopen(PATH, mode)

dlsym(handle, fun_name)

void (*fn)(int* cs,cJSON** js);

void echo_name(int* client_socket, cJSON** request)

Demo

QuickTime™ and aH.264 decompressor

are needed to see this picture.

QnA