How can I detect an empty line in a text stream and print everything below it?

Question

I am trying to use strcmp and fgets to read line by line to detect "\r\n". I'm working in a program with websockets and I want to show the HTML code in my console that it is written in the socket.

  while( ( n = read(s, buffer, sizeof(buffer)-1) ) > 0 ) {
    buffer[n] = 0;
    FILE *fp = fdopen(s, "r+"); 
    while(fgets(buffer, sizeof(buffer), fp)!=){
    if (strcmp(buffer,"\r\n")==0){
      fputs(buffer,stdout);
    }
    else{
      printf("error\n");
    }