char *extract_html(char *buffer, size_t size_buffer)
{
	char *end = buffer + size_buffer;
	char *cur;

	for (cur = buffer; cur + 3 < end; cur++)
		if (*cur == '\r' && *(cur+1) == '\n'
		    && *(cur+2) == '\r' && *(cur+3) == '\n')
			return cur + 4;
	return NULL;
}
char *extract_html(char *buffer, size_t size_buffer)
{
	char *end = buffer + size_buffer;
	char *cur;

	for (cur = buffer; cur + 3 < end; cur++)
		if (*cur == '\r' && *(cur+1) == '\n'
		    && *(cur+2) == '\r' && *(cur+3) == '\n')
			return cur + 4;
	return NULL;
}