ESP32 HTTPClient Library – setCookieJar

/*
 * Author: Avant Maker
 * Date: February 24, 2025
 * Version: 1.0
 * Description: This example demonstrates how to use the 
 * setCookieJar method to manage cookies with the ESP32 
 * HTTPClient Library. The ESP32 connects to a WiFi network, 
 * initializes an HTTPClient and a CookieJar, and links 
 * them using setCookieJar. It then sends a GET request
 * to www.httpbin.org/cookies/set?AvantMaker=HelloESP32 
 * to set a cookie.
 * After the request, the code retrieves and displays
 * the stored cookies (e.g., 'AvantMaker=HelloESP32') via
 * Serial Monitor by iterating over the CookieJar
 * and printing each cookie’s name and value.
 * Replace your-SSID and your-PASSWORD with
 * your WiFi credentials to test it.
 *
 * 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>

// WiFi credentials
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);

    // Connect to WiFi
    WiFi.begin(ssid, password);
    while (WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    Serial.println("\nConnected to WiFi");

    // Initialize HTTPClient and CookieJar
    HTTPClient http;
    CookieJar cookieJar;

    // Associate the CookieJar with the HTTPClient instance
    http.setCookieJar(&cookieJar);

    // Begin the HTTP request to set a cookie
    http.begin("http://www.httpbin.org/cookies/set?AvantMaker=HelloESP32");
    int httpCode = http.GET();

    // Check the response
    if (httpCode > 0) {
        Serial.println("Request successful");
        String payload = http.getString();
        Serial.println("Response: " + payload);

        // Display the stored cookies from the CookieJar
        Serial.println("Stored Cookies in ESP32:");
        for (size_t i = 0; i < cookieJar.size(); i++) {
            Serial.print("Cookie ");
            Serial.print(i + 1);
            Serial.print(": ");
            Serial.print(cookieJar[i].name);
            Serial.print("=");
            Serial.println(cookieJar[i].value);
        }

        // Verify cookies are set by making another request
        http.begin("http://www.httpbin.org/cookies");
        httpCode = http.GET();
        if (httpCode > 0) {
            String response = http.getString();
            Serial.println("Response after setting cookies:");
            Serial.println(response);
        }        
    } else {
        Serial.println("Error on HTTP request");
    }

    // Clean up
    http.end();
}

void loop() {
    // Nothing to do here
}