Get data from web, convert to variables

Question

I have a ESP32 that I use Arduino on to control some relays with a web server.

Right now I am checking the relay state like this:

// We now create a URI for the request
String url = "/read.php?id=";

Serial.print("Requesting URL: ");
Serial.println(url);

// This will send the request to the server
client.print(String("GET ") + url + "ESP" + ESPid + " HTTP/1.1\r\n"  +
             "Host: " + host + "\r\n" + 
             "Connection: close\r\n\r\n");
unsigned long timeout = millis();

while (client.available() == 0) {
  if (millis() - timeout > 5000) {
    Serial.println(">>> Client Timeout !");
    client.stop();
    return;
  }
}


Serial.println(" ");
// Read all the lines of the reply from server and print them to Serial
while(client.available()){
  line = client.readStringUntil('\r'); //    String
  Serial.println(line); 
}


if (line.toInt() == 100)  
{
  digitalWrite(Rele_1, LOW);
  digitalWrite(Rele_2, HIGH);
  digitalWrite(Rele_3, HIGH);

The part with:

if (line.toInt() == 100)  
{
  digitalWrite(Rele_1, LOW);
  digitalWrite(Rele_2, HIGH);
  digitalWrite(Rele_3, HIGH);

Will be copied and 100 will be changed for every possible variation.

This is not a god way to do it, when I get more relays on it. Each relay will have a 1 or 0 to start and stop.
Is there a way to split the 100 to control the relay? Like if a push 1&0&0 from my web server?
Is there a way to split 1&0&0 or r1=1&r2=0&r3=0 into variables to control the relays (pins)?

Answer 1

The solution i choose, was to switch from this:

if (line.toInt() == 100) 

To

if (line.charAt(1) == '1')   // Relay 1. 
{