Hands-On Network Programming with C

send_404()

In addition to the 400 Bad Request error, our server also needs to handle the case where a requested resource is not found. In this case, a 404 Not Found error should be returned. We define a helper function to return this error as follows:

/*web_server.c except*/void send_404(struct client_info *client) {    const char *c404 = "HTTP/1.1 404 Not Found\r\n"        "Connection: close\r\n"        "Content-Length: 9\r\n\r\nNot Found";    send(client->socket, c404, strlen(c404), 0);    drop_client(client);}

The send_404() function works exactly like the send_400() function defined previously.