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Commit 8a6a6c1f authored by Alexander Cock's avatar Alexander Cock
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FInalised Server for submitting, added some comments

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acock_comp30023_2019_project-1.zip
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image_tagger.c
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/*
* image_tagger.c
* source code from Lab 5/6 of COMP30023
* @author: Alexander D'Arcy Cock
*/
#include <errno.h>
......@@ -21,7 +22,7 @@
#include <sys/types.h>
#include <unistd.h>
// constants
// Constants for the HTTP response headers
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";
......@@ -34,7 +35,7 @@ static char const * const HTTP_400 = "HTTP/1.1 400 Bad Request\r\nContent-Length
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 char const * const SET_COOKIE = ;
// The html filenames are stored in constants
static char* const PAGE_1 = "1_intro.html";
static char* const PAGE_2 = "2_start.html";
static char* const PAGE_3 = "3_first_turn.html";
......@@ -43,17 +44,6 @@ static char* const PAGE_5 = "5_discarded.html";
static char* const PAGE_6 = "6_endgame.html";
static char* const PAGE_7 = "7_gameover.html";
/*
static char* P1_NAME;
static char* P2_NAME;
static int P1_GAME_STATE = 0;
static int P2_GAME_STATE = 0;
static char* KEYWORD_LIST_P1[100];
static char* KEYWORD_LIST_P2[100];
static int NUM_KEYWORD_P1 = 0;
static int NUM_KEYWORD_P2 = 0;
*/
// represents the types of method
typedef enum {
GET,
......@@ -61,6 +51,7 @@ typedef enum {
UNKNOWN
} METHOD;
// represents the states that the players can be in
typedef enum {
WELCOME,
WAITING,
......@@ -69,6 +60,7 @@ typedef enum {
GAMEOVER
} GAMESTATE;
// represents the different attributes of each player
struct Player {
char* name;
int nameLength;
......@@ -78,12 +70,11 @@ struct Player {
int numKeywords;
};
// The players are global to access them from any function
static struct Player player1;
static struct Player player2;
//player1.playerNum = 1;
//player2.playerNum = 2;
//checks the output from the buff to fetch the url of the request
static char* getURL(char* curr) {
char* url;
if (strncmp(curr, "1_intro.html ", 13) == 0 || strncmp(curr, " HTTP/1.1", 9) == 0)
......@@ -113,6 +104,7 @@ static char* getURL(char* curr) {
return url;
}
// Handles storing the keywords and returns true if there is a match to an added keyword
static bool addKeyword(char * keyword, int playerNum) {
int i = 0;
bool match = false;
......@@ -146,6 +138,7 @@ static bool addKeyword(char * keyword, int playerNum) {
return match;
}
// Returns the player that the cookie in the request header refers to
static struct Player* checkCookie(char* buff) {
char * cookie;
if((cookie = strstr(buff,"player=")) != NULL) {
......@@ -176,6 +169,7 @@ static struct Player* checkCookie(char* buff) {
return NULL;
}
// Forms the HTTP response to the client and returns true if one is sent
static bool sendResponse(int sockfd, char* file, char* post) {
char buff[2049];
int n;
......@@ -218,20 +212,16 @@ static bool sendResponse(int sockfd, char* file, char* post) {
}
}
// send the header first
if (write(sockfd, buff, n) < 0)
{
if (write(sockfd, buff, n) < 0) {
perror("write");
return false;
}
// send the file
int filefd = open(file, O_RDONLY);
do
{
do {
n = sendfile(sockfd, filefd, NULL, 2048);
}
while (n > 0);
if (n < 0)
{
} while (n > 0);
if (n < 0) {
perror("sendfile");
close(filefd);
return false;
......@@ -240,6 +230,7 @@ static bool sendResponse(int sockfd, char* file, char* post) {
return true;
}
// Handles the different cases for get requests and returns true if a response is sent
static bool getRequest(int sockfd, char* buff, char* url, int n) {
struct Player* player = checkCookie(buff);
......@@ -251,12 +242,17 @@ static bool getRequest(int sockfd, char* buff, char* url, int n) {
if (strcmp(url,PAGE_3) == 0 || strcmp(url,PAGE_6) == 0) {
player->gameState = READY;
}
} else if(player1.gameState == GAMEOVER) {
url = PAGE_7;
}
sendResponse(sockfd,url,NULL);
if(sendResponse(sockfd,url,NULL)) {
return true;
}
return false;
}
// Handles the different cases for post requests and returns true if a response is sent
static bool postRequest(int sockfd, char* buff, char* url, int n) {
char* post;
char* file;
......@@ -281,11 +277,13 @@ static bool postRequest(int sockfd, char* buff, char* url, int n) {
for(int i = 0; i < player2.numKeywords; i++) {
printf("%s\n",player2.keywordList[i]);
}
} else if (player1.gameState == COMPLETED && player2.gameState == COMPLETED) {
file = PAGE_6;
} else if(player1.gameState == GAMEOVER) {
file = PAGE_7;
} else {
file = PAGE_5;
}
} else if (player1.gameState == COMPLETED || player2.gameState == COMPLETED) {
file = PAGE_6;
} else if((post = strstr(buff,"quit=Quit")) != NULL || player1.gameState == GAMEOVER) {
file = PAGE_7;
player1.gameState = GAMEOVER;
......@@ -293,11 +291,29 @@ static bool postRequest(int sockfd, char* buff, char* url, int n) {
file = NULL;
}
sendResponse(sockfd,file,post);
if(strcmp(file,PAGE_6) == 0) {
int i = 0;
if(player1.numKeywords > 0) {
for(i = 0; i < player1.numKeywords; i++) {
free(player1.keywordList[i]);
}
player1.numKeywords = 0;
}
if(player2.numKeywords > 0) {
for(i = 0; i < player2.numKeywords; i++) {
free(player2.keywordList[i]);
}
player2.numKeywords = 0;
}
}
if(sendResponse(sockfd,file,post)) {
return true;
}
return false;
}
// Attempts to handle the http requests, returns true if a response is sent
static bool handle_http_request(int sockfd) {
// try to read the request
char buff[2049];
......@@ -312,6 +328,7 @@ static bool handle_http_request(int sockfd) {
return false;
}
printf("%s\n", buff);
// terminate the string
buff[n] = 0;
char * curr = buff;
......@@ -353,12 +370,10 @@ static bool handle_http_request(int sockfd) {
// never used, just for completeness
fprintf(stderr, "no other methods supported");
}
printf("P1: %d\nP2: %d\n",player1.gameState,player2.gameState);
return true;
}
int main(int argc, char * argv[]) {
if (argc < 3)
{
......@@ -466,5 +481,12 @@ int main(int argc, char * argv[]) {
}
}
if(player1.name != NULL) {
free(player1.name);
}
if(player2.name != NULL) {
free(player2.name);
}
return 0;
}
\ No newline at end of file
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