void
connection(int fd)
{
char request[1000], resource[1000], *ptr;
int ret;
int page_fd;
ret = recv_new(fd, request);
ptr = strstr(request, " HTTP/");
if(ptr == NULL)
{
perror("Not HTTP request");
}
else
{
*ptr = 0;
ptr = NULL;
if(strncmp(request, "GET ", 4) == 0)
{
ptr = request + 4;
}
if(strncmp(request, "HEAD ", 5) == 0)
{
ptr = request + 5;
}
if(ptr == NULL)
{
perror("Unknown Request. \n");
}
else
{
memset(resource, 0, sizeof(resource));
strncpy(resource, WEB_ROOT, sizeof(resource));
strncat(resource, ptr, sizeof(resource) - sizeof(WEB_ROOT) -1);
if(ptr[strlen(ptr) -1] == '/' )
{
strncat(resource, DEFAULT_PAGE, sizeof(resource)
- strlen(resource)
- sizeof(DEFAULT_PAGE)
- 1);
}
if((page_fd = open(resource, O_RDONLY)) == -1)
{
perror("open failed, file not found");
send_new(fd, "HTTP/1.1 404 NOT FOUND\r\n");
send_new(fd, "<html><head>404 NOT FOUND</head>");
send_new(fd, "<body>Sorry, NOT FOUND</body></html>");
close(fd);
}
else
{
int file_size;
memset(request, 0, sizeof(request));
file_size = get_file_size(page_fd);
read(page_fd, request, file_size);
send_new(fd, "HTTP/1.1 200 OK\r\n");
send_new(fd, request);
close(fd);
}
}
}
}/* connection() */
/*
This function parses the HTTP requests,
arrange resource locations,
check for supported media types,
serves files in a web root,
sends the HTTP error codes.
*/
int connection(int fd) {
char request[500], resource[500], *ptr;
int fd1, length;
if (recv_new(fd, request) == 0) {
printf("Recieve Failed\n");
}
printf("%s\n", request);
// Check for a valid browser request
ptr = strstr(request, " HTTP/");
if (ptr == NULL) {
printf("NOT HTTP !\n");
} else {
*ptr = 0;
ptr = NULL;
if (strncmp(request, "GET ", 4) == 0) {
ptr = request + 4;
}
if (ptr == NULL) {
printf("Unknown Request ! \n");
} else {
if (ptr[strlen(ptr) - 1] == '/') {
strcat(ptr, "index.html");
}
strcpy(resource, webroot());
strcat(resource, ptr);
char* s = strchr(ptr, '.');
int i;
for (i = 0; extensions[i].ext != NULL; i++) {
if (strcmp(s + 1, extensions[i].ext) == 0) {
fd1 = open(resource, O_RDONLY, 0);
printf("Openning \"%s\"\n", resource);
printf("Extention \"%s\"\n", extensions[i].ext);
if (fd1 == -1) {
printf("404 File not found Error\n");
send_new(fd, "HTTP/1.1 404 Not Found\r\n");
send_new(fd, "Server : Web Server in C\r\n\r\n");
send_new(fd, "<html><head><title>404 Not Found</head></title>");
send_new(fd, "<body><p>404 Not Found: The requested resource could not be found!</p></body></html>");
//Handling php requests
} else if (strcmp(extensions[i].ext, "php") == 0) {
printf("php\n");
php_cgi(resource, fd);
sleep(1);
close(fd);
exit(1);
} else {
printf("200 OK, Content-Type: %s\n\n",
extensions[i].mediatype);
send_new(fd, "HTTP/1.1 200 OK\r\n");
send_new(fd, "Server : Web Server in C\r\n\r\n");
if (ptr == request + 4) // if it is a GET request
{
if ((length = get_file_size(fd1)) == -1)
printf("Error in getting size !\n");
size_t total_bytes_sent = 0;
ssize_t bytes_sent;
while (total_bytes_sent < length) {
//Zero copy optimization
if ((bytes_sent = sendfile(fd, fd1, 0,
length - total_bytes_sent)) <= 0) {
if (errno == EINTR || errno == EAGAIN) {
continue;
}
perror("sendfile");
return -1;
}
total_bytes_sent += bytes_sent;
}
}
}
break;
}
int size = sizeof(extensions) / sizeof(extensions[0]);
if (i == size - 2) {
printf("415 Unsupported Media Type\n");
send_new(fd, "HTTP/1.1 415 Unsupported Media Type\r\n");
send_new(fd, "Server : Web Server in C\r\n\r\n");
send_new(fd, "<html><head><title>415 Unsupported Media Type</head></title>");
send_new(fd, "<body><p>415 Unsupported Media Type!</p></body></html>");
}
}
close(fd);
}
}
shutdown(fd, SHUT_RDWR);
}
