Parsing Data from HTTP Request (NodeMCU)

[imranahmed]

Hi,

Please let me know how to parse data from HTTP 1.1 request string. My Android App sending HTTP request to NodeMCU that sends "http://192.168.4.1/led/on" + 1234
NodeMCU on serial monitor shows POST /led/on1234 HTTP/1.1.

I want to parse or extract 1234 from request string how is it possible?

 

[andre_luis]

If you are using the Arduino on the NodeMCU side, the suited way to deal with POST messages is by using the method on() on the ESP8266WebServer library. Just add the led/on/ string as argument of this function and assign a function as the 2nd argument which will get the 1234 as the parameter.

See:

Arduino/libraries/ESP8266WebServer at master · esp8266/Arduino

ESP8266 core for Arduino. Contribute to esp8266/Arduino development by creating an account on GitHub.

github.com

 

[imranahmed]

If you are using the Arduino on the NodeMCU side, the suited way to deal with POST messages is by using the method on() on the ESP8266WebServer library. Just add the led/on/ string as argument of this function and assign a function as the 2nd argument which will get the 1234 as the parameter.

See:

Arduino/libraries/ESP8266WebServer at master · esp8266/Arduino

ESP8266 core for Arduino. Contribute to esp8266/Arduino development by creating an account on GitHub.

github.com

Thank you for good reply,

Please let me know that how many clients(nodemcu) should connect at a time with server(nodemcu).?

--- Updated Nov 4, 2021 ---

If you are using the Arduino on the NodeMCU side, the suited way to deal with POST messages is by using the method on() on the ESP8266WebServer library. Just add the led/on/ string as argument of this function and assign a function as the 2nd argument which will get the 1234 as the parameter.

See:

Arduino/libraries/ESP8266WebServer at master · esp8266/Arduino

ESP8266 core for Arduino. Contribute to esp8266/Arduino development by creating an account on GitHub.

github.com

I do with this

My URL is "http://192.168.4.1/" + "(" + 122 + ")";
 The request is POST /(122) HTTP/1.1

  String request = client.readStringUntil('\r');
  Serial.println("Request " + request);
  Serial.println();
  int location = request.indexOf(')');  //finds location of first ,
  String value = request.substring(7, location);   //captures first data String
  Serial.println("Value-> " + value);
  int intValue = value.toInt(); // I got 122 as a integer

 

[andre_luis]

how many clients(nodemcu) should connect at a time with server(nodemcu).?

I presume that in theory should be 255 clients, once each one will be connected within the same 192.168.4.x network.