ESP32 HTTPClient Library – setURL

/*
 * Author: Avant Maker
 * Date: February 21, 2025
 * Version: 1.0
 * Description: This example code demonstrates how to 
 * use the ESP32 HTTPClient Library's setURL method to 
 * set URL www.example.com, and performs a GET request. 
 * Ensure your ESP32 is connected to a Wi-Fi network before running 
 * this code. 
 *
 * License: MIT 
 * 
 * Code Source: This example code is sourced from the Comprehensive 
 * Guide to the ESP32 Arduino Core Library, accessible on 
 * AvantMaker.com. For additional code examples and in-depth 
 * documentation related to the ESP32 Arduino Core Library, 
 * please visit:
 *
 * https://avantmaker.com/references/esp32-arduino-core-index/
 *
 * AvantMaker.com, your premier destination for all things 
 * DIY, AI, IoT, Smart Home, and STEM projects. We are dedicated 
 * to empowering makers, learners, and enthusiasts with the resources
 * they need to bring their innovative ideas to life.
 */

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

const char* ssid = "your-SSID";       // Replace with your Wi-Fi SSID
const char* password = "your-PASSWORD"; // Replace with your Wi-Fi password

void setup() {
    Serial.begin(115200);
    WiFi.begin(ssid, password);

    while (WiFi.status() != WL_CONNECTED) {
        delay(1000);
        Serial.println("Connecting to WiFi...");
    }
    Serial.println("Connected to WiFi");
}

void loop() {
    HTTPClient http;

    Serial.println("[HTTP] Beginning with initial URL...");
    http.begin("http://initial.example.com/"); // Initial URL

    // Change the URL dynamically
    Serial.println("[HTTP] Setting new URL...");
    if (http.setURL("http://www.example.com/")) {
        Serial.println("[HTTP] URL successfully updated to www.example.com");
    } else {
        Serial.println("[HTTP] Failed to update URL");
        http.end();
        return;
    }

    // Perform GET request with the new URL
    int httpCode = http.GET();
    if (httpCode > 0) {
        Serial.println("[HTTP] GET request successful, code: " + String(httpCode));
        String payload = http.getString();
        Serial.println("Response: " + payload);
    } else {
        Serial.println("[HTTP] GET request failed, error: " + String(httpCode));
    }

    http.end(); // Close the connection
    delay(5000); // Wait 5 seconds before next loop
}