如何使用ESP8266（Arduino核心）携带Cookie发送HTTP请求？

Hey Lani, great question! Using cookies to authenticate requests with an ESP8266 (Arduino core) is totally doable—here's a step-by-step breakdown to make it work for your YouTube channel info use case:

Before coding, you need to pull the active login cookies from your browser:

• Open the YouTube channel page you want to access in your desktop browser.
• Press F12 to open the developer tools, then go to the Application (Chrome) or Storage (Firefox) tab.
• Under "Cookies", select the youtube.com domain.
• Locate the authentication-related cookies (common ones include LOGIN_INFO, SID, or HSID). Copy the full key-value pairs for these cookies (e.g., LOGIN_INFO=abc123; SID=xyz789;).

Note: Cookies expire after a certain time, so you’ll need to refresh these values periodically if your ESP stops authenticating.

We’ll use the built-in ESP8266WiFi library for WiFi connection and ESP8266HTTPClient for sending HTTP requests with custom headers (including cookies). Make sure these libraries are installed via the Arduino Library Manager.

Here’s a complete, commented sketch that connects to WiFi, sends a GET request with your cookies, and prints the response:

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>

// Replace with your WiFi credentials
const char* ssid = "YOUR_WIFI_NAME";
const char* password = "YOUR_WIFI_PASSWORD";

// Replace with your target YouTube channel URL and cookies
const char* targetUrl = "https://www.youtube.com/channel/YOUR_CHANNEL_ID/about";
const char* authCookies = "LOGIN_INFO=your_login_cookie; SID=your_sid_cookie;";

void setup() {
  Serial.begin(115200);
  delay(10);

  // Connect to WiFi
  Serial.print("Connecting to ");
  Serial.println(ssid);
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi connected! IP: " + WiFi.localIP().toString());
}

void loop() {
  // Run request every 60 seconds to avoid rate limiting
  if ((millis() % 60000) == 0) {
    if (WiFi.status() == WL_CONNECTED) {
      HTTPClient http;

      // Initialize request with target URL
      http.begin(targetUrl);
      // Add authentication cookies to the request header
      http.addHeader("Cookie", authCookies);
      // Mimic a browser user-agent to avoid being blocked by YouTube
      http.addHeader("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36");

      // Send GET request
      int httpCode = http.GET();

      // Handle response
      if (httpCode > 0) {
        Serial.printf("\nHTTP Status Code: %d\n", httpCode);
        if (httpCode == HTTP_CODE_OK) {
          String payload = http.getString();
          // Print first 500 characters of the response to avoid Serial overflow
          Serial.println("Response snippet:");
          Serial.println(payload.substring(0, 500));
        }
      } else {
        Serial.printf("Request failed: %s\n", http.errorToString(httpCode).c_str());
      }

      // Close the HTTP connection
      http.end();
    } else {
      Serial.println("WiFi disconnected—can't send request");
    }
  }
  delay(1000);
}

• Cookie Expiry: Keep an eye on when your cookies expire—you’ll need to re-copy fresh values from your browser if the ESP starts getting "unauthorized" responses.
• User-Agent Header: Sites like YouTube block requests with generic/empty user-agents. The example uses a modern Chrome user-agent to mimic a real browser.
• HTTPS Certificate Checks: If you hit SSL errors, you can add true to the http.begin() call (http.begin(targetUrl, true)) to skip certificate verification (not recommended for long-term use, but useful for testing).
• Rate Limiting: Don’t send requests too frequently—YouTube may block your ESP’s IP if you spam requests. The 60-second delay in the example is a safe starting point.

内容的提问来源于stack exchange，提问作者Arduino Projects