The document discusses developing a lightweight and high-performance JSON API server in C. It describes creating a server that accepts HTTP requests, runs each request in a separate thread for processing, and uses dynamic linking and loading to call functions to handle each request based on parameters in the request. An example demonstrates getting parameters from a GET request and calling the corresponding function to process the request.

1. Developing a lightweight, hi-performance and dynamic JSON api server with C Shaikh Sonny Aman for SQABD LT4

2. Background

3. Play Tools PHP Java Python C

4. WHY!!

5. Requirement http://myserver.com:8080 ? mod =score& action =get_score& id =123 { score:4, id:123 }

6. The Server if ( (client_socket=accept(server_socket, (struct sockaddr *)&cad, &alen)) < 0) { printf(&quot;accept failed\n&quot;); exit (1); } pthread_create(&tid, NULL, serverthread, (void*)client_socket ); While(1){ } accept connection from client run a thread to process

7. Processing Request Read all available data recv(client_socket, buffer,buffer_size, 0);

8. Processing Request Host: www.http.header.free.fr Accept: image/gif, image/x-xbitmap, image/jpeg, imagepjpeg, Accept-Language: Fr Accept - Encoding: gzip, deflate Get the request params mod =score& action =get_score& id =123 GET: Http1.1

9. 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)

10. Demo

11. QnA