support v2 cloud https

Author: cail

InfluxDb.cpp

@@ -81,10 +81,26 @@ void Influxdb::setVersion(uint16_t version){
   begin();
 }
 
+/**
+ * Set servers finger print for HTTPS v2 Influx proto
+ * @param version accepts 1 for version 1.x or 2 for version 2.x
+ */
+void Influxdb::setFingerPrint(char *fingerPrint){
+  _fingerPrint = fingerPrint;
+  begin();
+}
+
 void Influxdb::begin() {
   // TODO: recreate HttpClient on db change?
   if(_db_v == 2){
-    http.begin(_host, _port, "/api/v2/write?org=" + _org + "&bucket=" + _bucket);
+    if (_port == 443) {
+        if (_fingerPrint)
+          client.setFingerprint(_fingerPrint);
+        http.begin(client, _host, _port, "/api/v2/write?org=" + _org + "&bucket=" + _bucket,
+                   true);
+    } else {
+        http.begin(_host, _port, "/api/v2/write?org=" + _org + "&bucket=" + _bucket);
+    }
     http.addHeader("Authorization", "Token " + _token);
   } else {
     if (_user && _pass) {

InfluxDb.h

@@ -8,6 +8,7 @@
 */
 #if defined(ESP8266)
 #include <ESP8266HTTPClient.h>
+#include <WiFiClientSecure.h>
 #elif defined(ESP32)
 #include <WiFi.h>
 #include <HTTPClient.h>
@@ -30,6 +31,7 @@ class Influxdb {
   void setOrg(String org);
   void setToken(String token);
   void setPort(uint16_t port);
+  void setFingerPrint(char *fingerPrint);
 
   void prepare(InfluxData data);
   boolean write();
@@ -39,6 +41,7 @@ class Influxdb {
 
  private:
   HTTPClient http;
+  WiFiClientSecure client;
   String _host;
   uint16_t _port;
   String _db;
@@ -48,6 +51,7 @@ class Influxdb {
   String _org;
   String _token;
   uint16_t _db_v;
+  char *_fingerPrint;
 
   std::list<InfluxData> prepared;