Simple URL parser

parser.ino

void setup() {
  Serial.begin(9600);

  while (!Serial)
  {}
  // put your setup code here, to run once:
  String str = "GET /?led06=1";

  int   led_index    = str.indexOf("led");
  int   equal_index  = str.indexOf("=");
  int   led_pin      = str.substring(led_index+3,equal_index).toInt();      // Find the substring that contains the pin number,
                                                                            // and convert it into an int    
  // ** Single value pair parsing **                                                                          
  int   led_val      = str.substring(equal_index+1,str.indexOf("HTTP")).toInt(); // Find the substring that contains the value,
                                                                            // and convert it into an int                                                                            
  
  //Show the substring indexes and values for debugging
  Serial.print("led_index, equal_index, led_pin, led_val: ");
  Serial.print(led_index);
  Serial.print(", ");
  Serial.print(equal_index);
  Serial.print(", ");
  Serial.print(led_pin);
  Serial.print(", ");
  Serial.print(led_val);

}

void loop() {
  // put your main code here, to run repeatedly:

}