Tested on ESP8266 architecture. Examples are commented.

Author: instanceofMA

examples/esp32/get/get.ino

@@ -13,7 +13,8 @@ void setup() {
     options.method = "GET";
 
     Response response = fetch("https://api.github.com/", options);
-
+    
+    // Printing response body as plain text.
     Serial.println();
     Serial.println(response.text());
 }

examples/esp32/post/post.ino

@@ -15,7 +15,10 @@ void setup() {
 
     Response response = fetch("https://api.grandeur.tech/auth/login/?apiKey=grandeurkywxmoy914080rxf9dh05n7e", options);
 
+    Serial.println(response)
+    // Printing response.
     Serial.println(response);
+    // Printing respons headers.
     Serial.printf("Connection Header: \"%s\"\n", response.headers.get("Content-Type").c_str());
     Serial.printf("Connection Header: \"%s\"\n", response.headers.get("Connection").c_str());
 }

examples/esp8266/get/get.ino

@@ -16,6 +16,7 @@ void setup() {
 
     Response response = fetch("https://api.github.com/", options);
 
+    // Printing response body as plain text.
     Serial.println();
     Serial.println(response.text());
 }

examples/esp8266/post/post.ino

@@ -17,7 +17,9 @@ void setup() {
 
     Response response = fetch("https://api.grandeur.tech/auth/login/?apiKey=grandeurkywxmoy914080rxf9dh05n7e", options);
 
+    // Printing response.
     Serial.println(response);
+    // Printing respons headers.
     Serial.printf("Connection Header: \"%s\"\n", response.headers.get("Content-Type").c_str());
     Serial.printf("Connection Header: \"%s\"\n", response.headers.get("Connection").c_str());
 }

src/Fetch.cpp

@@ -134,7 +134,7 @@ size_t Response::printTo(Print& p) const {
 }
 
 RequestOptions::RequestOptions(): method("GET"), headers(Headers()), body(Body()),
-#ifdef ESP8266
+#if defined(ESP8266)
 fingerprint(""),
 #endif
 caCert("") {}

src/Fetch.h

@@ -80,7 +80,7 @@ class RequestOptions {
         String method;
         Headers headers;
         Body body;
-        #ifdef EEP8266
+        #if defined(ESP8266)
         String fingerprint;
         #endif
         String caCert;