proxy_server_with_cache.c

#include "proxy_parse.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <fcntl.h>
#include <time.h>
#include <sys/wait.h>
#include <errno.h>
#include <pthread.h>
#include <semaphore.h>

#define MAX_CLIENTS 10

typedef struct cache_element cache_element;

struct cache_element
{
  char *data;
  int len;
  char *url;
  time_t lru_time_track;
  cache_element *next;
};

cache_element *find(char *url);
int add_cache_element(char *data, int size, char *url);
void remove_cache_element();

int port_number = 8080;
int proxy_socketId;

pthread_t tid[MAX_CLIENTS];
sem_t semaphore;
pthread_mutex_t lock;

cache_element *head;
int cache_size;
int main(int argc, char *argv[])
{
  int client_socketId, client_len;
  struct sockaddr_in server_addr, client_addr;
  sem_init(&semaphore, 0, MAX_CLIENTS);

  pthread_mutex_init(&lock, NULL);

  if (argv == 2)
  {
    port_number = atoi(argv[1]);
  }
  else
  {
    printf("Too few arguments\n");
    exit(1);
  }

  printf("Starting proxy server at port : %d\n", port_number);
  proxy_socketId = socket(AF_INET, SOCK_STREAM, 0);

  if (proxy_socketId < 0)
  {
    printf("Failed to create a socket\n");
    exit(1);
  }
  int reuse = 1;
  if (setsockopt(proxy_socketId, SOL_SOCKET, SO_REUSEADDR, (const char *)&reuse, sizeof(reuse)) < 0)
  {
    perror("setSockOpt failed\n");
  }
  bzero((char *)&server_addr, sizeof(server_addr));

  server_addr.sin_family = AF_INET;
  server_addr.sin_port = htons(port_number);
  server_addr.sin_addr.s_addr = INADDR_ANY;
  if (bind(proxy_socketId, (struct sockaddr *)&server_addr, sizeof(server_addr) < 0))
  {
    perror("Port is not available\n");
    exit(1);
  }
  printf("Binding on port %d\n", port_number);
  int listen_status = listen(proxy_socketId, MAX_CLIENTS);
  if (listen_status < 0)
  {
    perror("Error in listening\n");
    exit(1);
  }
  int i = 0;
  int Connected_socketId[MAX_CLIENTS];
  
}