refactor(CustomHeaders): replace USE_SERIAL with Serial for consistency

Author: JakubAndrysek

libraries/HTTPClient/examples/CustomHeaders/CustomHeaders.ino

@@ -1,43 +1,40 @@
 #include <Arduino.h>
 
 #include <WiFi.h>
-#include <assert.h>
 #include <HTTPClient.h>
 
-#define USE_SERIAL Serial
-
 // Enable or disable collecting all headers
 #define COLLECT_ALL_HEADERS true
 
 void setup() {
 
-  USE_SERIAL.begin(115200);
+  Serial.begin(115200);
 
-  USE_SERIAL.println();
-  USE_SERIAL.println();
-  USE_SERIAL.println();
+  Serial.println();
+  Serial.println();
+  Serial.println();
 
   for (uint8_t t = 4; t > 0; t--) {
-    USE_SERIAL.printf("[SETUP] WAIT %d...\n", t);
-    USE_SERIAL.flush();
+    Serial.printf("[SETUP] WAIT %d...\n", t);
+    Serial.flush();
     delay(1000);
   }
 
   WiFi.begin("SSID", "PASSWORD");
 
   while (WiFi.status() != WL_CONNECTED) {
     delay(500);
-    USE_SERIAL.print(".");
+    Serial.print(".");
   }
-  USE_SERIAL.println();
-  USE_SERIAL.println("Connected to WiFi: " + WiFi.SSID());
+  Serial.println();
+  Serial.println("Connected to WiFi: " + WiFi.SSID());
 }
 
 void loop() {
 
   HTTPClient http;
 
-  USE_SERIAL.print("[HTTP] Preparing HTTP request...\n");
+  Serial.print("[HTTP] Preparing HTTP request...\n");
   // This page will return the headers we want to test + some others
   http.begin("https://httpbingo.org/response-headers?x-custom-header=value:42");
 
@@ -51,32 +48,32 @@ void loop() {
   http.collectHeaders(headerKeys, headerKeysCount);
 #endif
 
-  USE_SERIAL.print("[HTTP] Sending HTTP GET request...\n");
+  Serial.print("[HTTP] Sending HTTP GET request...\n");
   // start connection and send HTTP header
   int httpCode = http.GET();
 
   // httpCode will be negative on error
   if (httpCode > 0) {
     // HTTP header has been send and Server response header has been handled
-    USE_SERIAL.printf("[HTTP] GET response code: %d\n", httpCode);
+    Serial.printf("[HTTP] GET response code: %d\n", httpCode);
 
-    USE_SERIAL.println("[HTTP] Headers collected:");
+    Serial.println("[HTTP] Headers collected:");
     for (size_t i = 0; i < http.headers(); i++) {
-      USE_SERIAL.printf("[HTTP] - '%s': '%s'\n", http.headerName(i).c_str(), http.header(i).c_str());
+      Serial.printf("[HTTP] - '%s': '%s'\n", http.headerName(i).c_str(), http.header(i).c_str());
     }
 
-    USE_SERIAL.println("[HTTP] Has header 'x-custom-header'? " + String(http.hasHeader("x-custom-header")) + " (expected true)");
-    USE_SERIAL.printf("[HTTP] x-custom-header: '%s' (expected 'value:42')\n", http.header("x-custom-header").c_str());
-    USE_SERIAL.printf("[HTTP] non-existing-header: '%s' (expected empty string)\n", http.header("non-existing-header").c_str());
+    Serial.println("[HTTP] Has header 'x-custom-header'? " + String(http.hasHeader("x-custom-header")) + " (expected true)");
+    Serial.printf("[HTTP] x-custom-header: '%s' (expected 'value:42')\n", http.header("x-custom-header").c_str());
+    Serial.printf("[HTTP] non-existing-header: '%s' (expected empty string)\n", http.header("non-existing-header").c_str());
 
 #if COLLECT_ALL_HEADERS
     // Server response with multiple headers, one of them is 'server'
-    USE_SERIAL.println("[HTTP] Has header 'server'? " + String(http.hasHeader("server")) + " (expected true)");
-    USE_SERIAL.printf("[HTTP] server: '%s'\n", http.header("server").c_str());
+    Serial.println("[HTTP] Has header 'server'? " + String(http.hasHeader("server")) + " (expected true)");
+    Serial.printf("[HTTP] server: '%s'\n", http.header("server").c_str());
 #endif
 
   } else {
-    USE_SERIAL.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
+    Serial.printf("[HTTP] GET... failed, error: %s\n", http.errorToString(httpCode).c_str());
   }
 
   http.end();