ESP32 http post request Authorization Bearer

[sohaibqamar86]

Hi,
I am trying to make an HTTP Post request using Arduino for ESP32. I am using the HTTPClient library to make the Post request in which I have to use the Authorization Bearer token. Below is my code.

//Your Domain name with URL path or IP address with path
const char* serverName = "http://domain.com";

void loop() {
    //Send an HTTP POST request every 10 minutes
    if ((millis() - lastTime) > timerDelay) {
        //Check WiFi connection status
        if(WiFi.status()== WL_CONNECTED){
            WiFiClient client;
            HTTPClient http;

            // Your Domain name with URL path or IP address with path
            http.begin(client, serverName);
            
            // Specify content-type header
	   //http.addHeader("Content-Type", "text/plain");
            http.addHeader("Content-Type", "application/x-www-form-urlencoded");
	   // Specify Authorization-type header
            http.addHeader("Authorization", "Bearer eyJ0eXAiOiJK...");
            // Data to send with HTTP POST
            String httpRequestData = "/api/v1/cattle/location?cattle_id=1&location_date=2022-05-1015:25:00&latitude=12.1231111&longitude=-151.82723";
            // Send HTTP POST request
            int httpResponseCode = http.POST(httpRequestData);

            Serial.print("HTTP Response code: ");
            Serial.println(httpResponseCode);

            // Free resources
            http.end();
        }
        else {
            Serial.println("WiFi Disconnected");
        }
        lastTime = millis();
    }
}

I have tried both Content-Type and even without any Content-Type.
My ESP32 is successfully connecting and getting a valid IP Address. After making the Post request, I am getting

HTTP Response code: 400

.

I have checked the same Post request using Postman and I am getting the right response. Details of Postman's request are below.

Looking for advice to make it work, maybe it's trivial for experts.
Regards
Sohaib

[horace]

have you had a look at esp32-http-get-post-arduino
I have used GET OK but never attempted to use POST

[sohaibqamar86]

Hi @horace, thanks for the response.
Yes, I have checked that tutorial, I am actually using its Post method in my case as well but the Authorization isn't working for some reason.

[sohaibqamar86]

Problem solved.
Below is the updated code, hope it will save someone's time.

#include <WiFi.h>
#include <HTTPClient.h>

#define TIME_POST_DATA 5000	// In miliSec

const char* ssid = "mySSID";
const char* password = "myPass";

//Your Domain name with URL path or IP address with path
const char* serverName2 = "http://domain.com/api/v1/cattle/location?cattle_id=1&location_date=2022-05-10%2015:25:00&latitude=12.1231111&longitude=-151.82723";

// the following variables are unsigned longs because the time, measured in
// milliseconds, will quickly become a bigger number than can be stored in an int.
unsigned long lastTime = 0;


String payload;
int httpResponseCode;
String httpRequestData;

void setup() {
    Serial.begin(115200);

    WiFi.begin(ssid, password);
    Serial.println("Connecting");
    while(WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("");
    Serial.print("Connected to WiFi network with IP Address: ");
    Serial.println(WiFi.localIP());
}

void loop() {
    //Send an HTTP POST request every 10 minutes
    if ((millis() - lastTime) > TIME_POST_DATA) {
        //Check WiFi connection status
        if(WiFi.status()== WL_CONNECTED){
            WiFiClient client;
            HTTPClient http;
			String recv_token = "eyJ0eXAiOiJK..."; // Complete Bearer token
			recv_token = "Bearer " + recv_token;	// Adding "Bearer " before token
			
			// Sending POST request for Location Data.
			http.begin(client, serverName2);
			http.addHeader("Authorization", recv_token); // Adding Bearer token as HTTP header
			httpRequestData = "http://domain.com/api/v1/cattle/location?cattle_id=1&location_date=2022-05-10%2015:25:00&latitude=12.1231111&longitude=-151.82723 HTTP/1.1";
			// Send HTTP POST request
            httpResponseCode = http.POST(httpRequestData);
            Serial.print("HTTP Response code: ");
            Serial.println(httpResponseCode);
            
            if (httpResponseCode>0) {
                payload = http.getString();
                Serial.println(payload);
            }
			// Free resources
            http.end();
			//while(1);
        }
        else {
            Serial.println("WiFi Disconnected");
        }
        lastTime = millis();
    }
}