http-server.c

/*
** http-server.c
*/

#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <arpa/inet.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/in.h>
#include <strings.h>
#include <sys/select.h>
#include <sys/sendfile.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>

#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <time.h>

void reset_game();
void reset_user(int sockfd);
void set_user(int sockfd);
void user_ready(int sockfd);
void print_details();
void check_win(int user, char *keyword);
char *substring(char *string, int position, int length);
void insert_substring(char *a, char *b, int position);

// constants
static char const * const HTTP_200_FORMAT = "HTTP/1.1 200 OK\r\n\
Content-Type: text/html\r\n\
Content-Length: %ld\r\n\r\n";
static char const * const HTTP_200_FORMAT_WITH_COOKIE = "HTTP/1.1 200 OK\r\n\
Content-Type: text/html\r\n\
Set-Cookie: id=%s\r\n\
Content-Length: %ld\r\n\r\n";
static char const * const HTTP_400 = "HTTP/1.1 400 Bad Request\r\nContent-Length: 0\r\n\r\n";
static int const HTTP_400_LENGTH = 47;
static char const * const HTTP_404 = "HTTP/1.1 404 Not Found\r\nContent-Length: 0\r\n\r\n";
static int const HTTP_404_LENGTH = 45;

static int user1 = -1;
static char *user1_name = "";
static int user1_start = 0;
char user1_guesses[100][100];
int user1_guess_number = 0;

static int user2 = -1;
static char *user2_name = "";
static int user2_start = 0;
char user2_guesses[100][100];
int user2_guess_number = 0;
char user1_current_guesses[10100];
char user2_current_guesses[10100];

int gameover = 0;

static char *webpage;

// represents the types of method
typedef enum
{