Make the server listen constantly and fix a bug
This commit is contained in:
parent
a8698e38f9
commit
36495526b5
1
.gitignore
vendored
1
.gitignore
vendored
@ -2,6 +2,7 @@
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*.out
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*.o
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*.html
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*.tgz
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!public/*.html
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http/client
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http/server
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@ -24,4 +24,8 @@ clean:
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$(RM) $(TARGET_1)
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$(RM) $(TARGET_2)
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$(RM) *.o
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$(RM) *.html
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$(RM) *.html
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$(RM) *.tgz
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package:
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tar -cvzf server.tgz $(TARGET_1).c $(TARGET_2).c shared public Makefile
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236
http/server.c
236
http/server.c
@ -14,10 +14,8 @@
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#define LISTEN_BACKLOG 5 //< Define maximum size of the input queue
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static int create_server_socket(uint16_t port, struct sockaddr_in incoming);
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static char * setup_server_response(char* dir, char* filename, int current_session, int sockfd);
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static char * setup_server_response(char* dir, char* ifile, char* request);
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static char * get_file_contents(char* dir, char* filename);
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static char * wday_to_string(int day);
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static char * month_to_string(int month);
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int main(int argc, char *argv[]) {
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check_opts_number(argc);
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@ -67,21 +65,40 @@ int main(int argc, char *argv[]) {
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incoming.sin_family = AF_INET; //< Use IPv4
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int sockfd = create_server_socket(port, incoming); //< Define a server socket
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int current_session = 0;
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socklen_t peer_addr_size = sizeof(struct sockaddr_in);
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/// Start accepting connections
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int current_session = accept(sockfd, (struct sockaddr*) &incoming, &peer_addr_size); //< Save the current session
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while(1) { //< Accept connections until terminated
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/// Start accepting connections
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current_session = accept(sockfd, (struct sockaddr*) &incoming, &peer_addr_size); //< Save the current session
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/// Setup the server response
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response = setup_server_response(dir, ifile, current_session, sockfd);
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if(current_session < 0) {
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(void) fprintf(stderr, "ERROR: Could not start accepting connections\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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} else {
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char *request = malloc (sizeof (char) * __INT16_MAX__);
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/// Send the response to the client
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if(send(current_session, response, strlen(response) + 1, 0) < 0) {
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(void) fprintf(stderr, "ERROR: Could not send the response to the client\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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if(recv(current_session, request, strlen(request) - 1, 0) < 0) {
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(void) fprintf(stderr, "ERROR: Could not receive connection from client\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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}
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/// Setup the server response
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response = setup_server_response(dir, ifile, request);
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/// Send the response to the client
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if(send(current_session, response, strlen(response) + 1, 0) < 0) {
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(void) fprintf(stderr, "ERROR: Could not send the response to the client\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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}
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}
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}
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close(current_session);
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@ -153,80 +170,80 @@ static int create_server_socket(uint16_t port, struct sockaddr_in incoming) {
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/**
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* @brief Function to create the HTTP response
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* @details Gets the client request
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* If there is no current session, it exits with an error
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* If the server could not receive a client connection, it exits with an error
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* If the server receives an invalid requests, a 400 header is build and the function adds it to response
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* If a GET request is received, the function tries to open the resource:
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* - if it could open it, it builds a 200 header and the file contents as body and adds them to response
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* - if it could not open it, it builds a 404 header and adds it to response
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* If anything other than a GET request is received, a 501 header is build, adds it to response and logs it
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* If anything other than a GET request is received, a 501 header is build and the function adds it to response
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* At the end, it returns the server response with header and body (if available)
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* @param dir - the directory of the file
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* filename - the name of the file
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* current_session - the current client session
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* sockfd - the socket configuration
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* ifile - the name of the indexfile
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* request - the request of the client
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* @return response - A header with the status code and a body (if available)
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**/
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static char * setup_server_response(char* dir, char* filename, int current_session, int sockfd) {
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if(current_session < 0) {
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(void) fprintf(stderr, "ERROR: Could not start accepting connections\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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} else {
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char request[__INT16_MAX__];
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static char response[__INT16_MAX__];
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static char * setup_server_response(char* dir, char* ifile, char* request) {
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char *response = malloc (sizeof (char) * __INT16_MAX__);
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if(recv(current_session, request, strlen(request) - 1, 0) < 0) {
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(void) fprintf(stderr, "ERROR: Could not receive connection from client\n");
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close(current_session);
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close(sockfd);
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exit(EXIT_FAILURE);
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} else {
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char method[4];
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strncpy(method, request, 4); //< Get the request type
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method[3] = 0; //< Add terminating char
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char method[4];
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strncpy(method, request, 3); //< Get the request type
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method[3] = 0; //< Add terminating string
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char header[__INT8_MAX__ + 100];
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char header[__INT8_MAX__ + 100];
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if(strcmp(method, "GET") == 0) {
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char *body = get_file_contents(dir, filename);
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if(strcmp(method, "GET") == 0) {
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char *body = NULL;
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char *delim = strstr(request, "/");
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char *req_file = strtok(delim, " "); //< Get the requested file
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if(body != NULL) {
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time_t t = time(NULL);
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struct tm tm = *gmtime(&t);
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char *wday = wday_to_string(tm.tm_wday);
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char *month = month_to_string(tm.tm_mon + 1);
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snprintf(
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header,
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sizeof header,
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"HTTP/1.1 200 OK\r\nDate: %s, %d %s %d %d:%d:%d %s\r\nContent-Length: %ld\r\nConnection: close\r\n\r\n",
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wday, tm.tm_mday, month, tm.tm_year + 1900, tm.tm_hour, tm.tm_min, tm.tm_sec, tm.tm_zone, strlen(body)
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); //< Build the 200 header
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strcat(response, header);
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strcat(response, body);
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} else {
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snprintf(
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header,
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sizeof header,
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"HTTP/1.1 404 Not Found\r\nConnection: close\r\n\r\n"
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); //< Build the 404 header
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strcat(response, header);
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}
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} else {
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fprintf(stderr, "ERROR: Unhandled HTTP request method received\n");
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snprintf(
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header,
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sizeof header,
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"HTTP/1.1 501 Not ImplementedConnection: close\r\n\r\n"
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); //< Build 501 the header
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strcat(response, header);
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}
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return response;
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if(strlen(req_file) == 1) {
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body = get_file_contents(dir, ifile);
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}
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else {
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char *rest = strstr(request, "HTTP/1.1");
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rest = strtok(rest, "\r\n");
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if(rest == NULL) {
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strcpy(
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header,
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"HTTP/1.1 400 Bad Request\r\nConnection: close\r\n\r\n"
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); //< Build the 400 header
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strcat(response, header);
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} else {
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body = get_file_contents(dir, req_file + 1);
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(void) fprintf(stdout, "GET: %s\n", req_file);
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}
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}
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if(body != NULL) {
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time_t current_time;
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time(¤t_time);
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struct tm * tm = gmtime(¤t_time);
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char time_string[50];
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strftime(time_string, 50, "%a, %d %b %y %H:%M:%S %Z", tm);
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snprintf(
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header,
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sizeof header,
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"HTTP/1.1 200 OK\r\nDate: %s\r\nContent-Length: %ld\r\nConnection: close\r\n\r\n",
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time_string, strlen(body)
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); //< Build the 200 header
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strcat(response, header);
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strcat(response, body);
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} else {
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strcpy(
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header,
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"HTTP/1.1 404 Not Found\r\nConnection: close\r\n\r\n"
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); //< Build the 404 header
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strcat(response, header);
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}
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} else {
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strcpy(
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header,
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"HTTP/1.1 501 Not Implemented\r\nConnection: close\r\n\r\n"
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); //< Build 501 the header
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strcat(response, header);
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}
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return response;
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}
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/**
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@ -256,77 +273,8 @@ static char * get_file_contents(char *dir, char *filename) {
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int file_length = ftell(file); //< Get file length
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fseek(file, 0, SEEK_SET); //< Set the position to begining of stream
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res = malloc(file_length); //< Allocate memory for the file contents
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if(res != 0) {
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fread(res, 1, file_length, file); //< Read the contents into res
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} else {
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return " ";
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}
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fread(res, 1, file_length, file); //< Read the contents into res
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return res;
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}
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}
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/**
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* @brief Function to convert a int weekday to string weekday
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* @details Gets the weekday as int, converts it to string and returns the string
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* @param day - the weekday as int
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* @return the weekday as a string
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**/
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static char * wday_to_string(int day) {
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switch(day) {
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case 1:
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return "Mon";
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case 2:
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return "Tue";
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case 3:
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return "Wed";
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case 4:
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return "Thu";
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case 5:
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return "Fri";
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case 6:
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return "Sat";
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case 7:
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return "Sun";
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default:
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return NULL;
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}
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}
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/**
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* @brief Function to convert a int month to string month
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* @details Gets the month as int, converts it to string and returns the string
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* @param day - the month as int
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* @return the month as a string
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**/
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static char * month_to_string(int month) {
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switch(month) {
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case 1:
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return "Jan";
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case 2:
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return "Feb";
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case 3:
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return "Mar";
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case 4:
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return "Apr";
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case 5:
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return "May";
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case 6:
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return "Jun";
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case 7:
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return "Jul";
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case 8:
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return "Aug";
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case 9:
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return "Sep";
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case 10:
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return "Oct";
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case 11:
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return "Nov";
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case 12:
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return "Dec";
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default:
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return NULL;
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}
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}
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