new submitt one in 21:12

http-server.c

 /*
 ** http-server.c
+** Code completed by Weijiel6
+** finished time in 04/29/2019
 */
 
 #include <errno.h>
@@ -20,6 +22,7 @@
 #include <sys/types.h>
 #include <unistd.h>
 
+// used to check whether the game is finished
 bool check_end(int sockfd, char* word_putin); 
 
 // constants
@@ -31,11 +34,22 @@ 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;
 
+// set two players active states
 bool player1_r , player2_r;
+
+// set tow players socket
 int player1_s, player2_s;
+
+// save players write in keywords
 char player1_w[2000][200], player2_w[2000][200];
+
+// save player write in keywords number
 int player1_w_len, player2_w_len;
+
+// flage for end the game
 bool end_game;
+
+//flage for quit the game
 bool quit_game; 
 
 // represents the types of method
@@ -48,8 +62,6 @@ typedef enum
 
 static bool handle_http_request(int sockfd)
 {	
-	//printf("Here is one socket goes in !");
-	//printf("%d\n", sockfd);
     // try to read the request
     char buff[2049];
     int n = read(sockfd, buff, 2049);
@@ -62,11 +74,13 @@ static bool handle_http_request(int sockfd)
         return false;
     }
     
+    // if both two players disconnected, reset the flags
     if (player1_s < 0 && player2_s < 0){
     	end_game = false;
     	quit_game = false;
 	}
 	
+	// set the players socked when players coming in 
 	if (player1_s < 0 && sockfd != player2_s) {
 		player1_s = sockfd;
 	} else if (player2_s < 0 && sockfd != player1_s) {
@@ -137,6 +151,7 @@ static bool handle_http_request(int sockfd)
         else if (method == POST)
         {	
         	if(strstr(buff, "quit=") != NULL) {
+        		// if one player quit the game reset the information for it
         		if ( sockfd == player1_s) {
         			player1_s = -1;
         			player1_r = false;
@@ -175,8 +190,15 @@ static bool handle_http_request(int sockfd)
 				// locate the username, it is safe to do so in this sample code, but usually the result is expected to be
 	            // copied to another buffer using strcpy or strncpy to ensure that it will not be overwritten.
 	            char * username = strstr(buff, "user=") + 5;
+	            char *buf = "<p>";
+	            char *endbuf = "</p>\n\n";
+	            
+	            // get the length
 	            int username_length = strlen(username);
-	            // the length needs to include the ", " before the username
+	            int buf_length = strlen(buf);
+	            int endbuf_length = strlen(endbuf);
+	            
+	            // the length needs to include the "<p>"and "</p>\n\n" before the username
 	            long added_length = username_length + 9;
 	
 	            // get the size of the file
@@ -201,24 +223,19 @@ static bool handle_http_request(int sockfd)
 	                return false;
 	            }
 	            close(filefd);
-	            //printf("let me see what in the file\n");
 	            // move the trailing part backward
 	            int p1, p2;
 	            for (p1 = size - 1, p2 = p1 - added_length ; p1 >= size - 212; --p1, --p2)
 	                buff[p1] = buff[p2];
 	            // copy the username
-	            char *buf = "<p>";
-	            int buf_length = strlen(buf);
+	            
+	            // write the "<p>" and "</p>\n\n"
 	            strncpy(buff + p2, buf, buf_length);            
 	            strncpy(buff + p2 + buf_length, username, username_length);
-				char *endbuf = "</p>\n\n";
-	            int endbuf_length = strlen(endbuf);
 	            strncpy(buff + p2 + buf_length + username_length, endbuf, endbuf_length);
-				buff[p2+ buf_length + username_length+endbuf_length] = '<';
 	            
-	            /*for (int i =0; i < 2048;i++){
-	            	printf("%c",buff[i]);
-				}*/
+	            // set the last one to "<"
+				buff[p2+ buf_length + username_length+endbuf_length] = '<';
 	            if (write(sockfd, buff, size) < 0)
 	            {
 	                perror("write");
@@ -232,8 +249,7 @@ static bool handle_http_request(int sockfd)
     else if (*curr == '?') {
     	if (method == GET)
         {	
-        	printf("what is sockt goes in first turn in now?");
-        	printf("%d\n", sockfd);
+        	// change the players state 
         	if (sockfd == player1_s) {
         		player1_r = true;
 			} else if (sockfd == player2_s) {
@@ -266,6 +282,7 @@ static bool handle_http_request(int sockfd)
         }
         else if (method == POST)
         {	
+        	// if one player quit the game reset the information for it
         	if(strstr(buff, "quit=") != NULL) {
         		if ( sockfd == player1_s) {
         			player1_s = -1;
@@ -302,7 +319,11 @@ static bool handle_http_request(int sockfd)
 	            close(filefd);
 			}
 			else if (strstr(buff, "guess=") != NULL) {
+				
+				// get the keyward which would be wrote in
 				char * getword = strstr(buff, "keyword=") + 8;
+				
+				// if the quit game flag is true would quit the game
 				if (quit_game) {
 					// get the size of the file
 		            struct stat st;
@@ -329,6 +350,8 @@ static bool handle_http_request(int sockfd)
 		            }
 		            close(filefd);
 				}
+				
+				// if the end game flag is ture would end the game
 				if(end_game) {
 					if (sockfd == player1_s) {
 						player1_s = -1;
@@ -364,8 +387,14 @@ static bool handle_http_request(int sockfd)
 		            }
 		            close(filefd);
 				}
+				
+				// if both players are ready, would send accepted file
 				if (player1_r && player2_r) {
+					
+					//if one guess the same word it would end the game 
 					if (check_end(sockfd, getword)) {
+						
+						// when the player end the game, reset the information for the player
 						if (sockfd == player1_s) {
 							player1_s = -1;
 							player1_r = false;
@@ -400,7 +429,7 @@ static bool handle_http_request(int sockfd)
 			            }
 			            close(filefd);
 					} else {
-						
+						// keep put ward in and guess 
 						// get the size of the file
 			            struct stat st;
 			            stat("4_accepted.html", &st);
@@ -427,6 +456,7 @@ static bool handle_http_request(int sockfd)
 			            close(filefd);
 					}
 				} else {
+					// not both players active so send discarded file
 					// get the size of the file
 		            struct stat st;
 		            stat("5_discarded.html", &st);
@@ -468,7 +498,7 @@ static bool handle_http_request(int sockfd)
     return true;
 }
 
-
+// check the word list and change the end game flag and put the word into list
 bool check_end(int sockfd, char* word_putin) {
 	if (sockfd == player1_s) {
 		for (int i = 0; i < player2_w_len; i++){
@@ -502,6 +532,7 @@ int main(int argc, char * argv[])
     	fprintf(stderr, "image_tagger server is now running at IP: %s on port %s\n", argv[1], argv[2]);
 	}
 	
+	//set all the global information for the plaers
 	player1_r = player2_r = false;
 	
 	player1_s = player2_s = -1;