firebase.h

// Copyright 2017 Google Inc.
// Though this is NOT an officially supported Google product!
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#pragma once

// Must define a constant FIREBASE_ENDPOINT to be the database url
// static const char* FIREBASE_ENDPOINT = "https://myproject.firebaseio.com";

const uint8_t GeoTrustCA_cer[] PROGMEM = {
  0x30, 0x82, 0x03, 0x54, 0x30, 0x82, 0x02, 0x3c, 0xa0, 0x03, 0x02, 0x01,
  0x02, 0x02, 0x03, 0x02, 0x34, 0x56, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86,
  0x48, 0x86, 0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x30, 0x42, 0x31,
  0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06, 0x13, 0x02, 0x55, 0x53,
  0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04, 0x0a, 0x13, 0x0d, 0x47,
  0x65, 0x6f, 0x54, 0x72, 0x75, 0x73, 0x74, 0x20, 0x49, 0x6e, 0x63, 0x2e,
  0x31, 0x1b, 0x30, 0x19, 0x06, 0x03, 0x55, 0x04, 0x03, 0x13, 0x12, 0x47,
  0x65, 0x6f, 0x54, 0x72, 0x75, 0x73, 0x74, 0x20, 0x47, 0x6c, 0x6f, 0x62,
  0x61, 0x6c, 0x20, 0x43, 0x41, 0x30, 0x1e, 0x17, 0x0d, 0x30, 0x32, 0x30,
  0x35, 0x32, 0x31, 0x30, 0x34, 0x30, 0x30, 0x30, 0x30, 0x5a, 0x17, 0x0d,
  0x32, 0x32, 0x30, 0x35, 0x32, 0x31, 0x30, 0x34, 0x30, 0x30, 0x30, 0x30,
  0x5a, 0x30, 0x42, 0x31, 0x0b, 0x30, 0x09, 0x06, 0x03, 0x55, 0x04, 0x06,
  0x13, 0x02, 0x55, 0x53, 0x31, 0x16, 0x30, 0x14, 0x06, 0x03, 0x55, 0x04,
  0x0a, 0x13, 0x0d, 0x47, 0x65, 0x6f, 0x54, 0x72, 0x75, 0x73, 0x74, 0x20,
  0x49, 0x6e, 0x63, 0x2e, 0x31, 0x1b, 0x30, 0x19, 0x06, 0x03, 0x55, 0x04,
  0x03, 0x13, 0x12, 0x47, 0x65, 0x6f, 0x54, 0x72, 0x75, 0x73, 0x74, 0x20,
  0x47, 0x6c, 0x6f, 0x62, 0x61, 0x6c, 0x20, 0x43, 0x41, 0x30, 0x82, 0x01,
  0x22, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86, 0xf7, 0x0d, 0x01,
  0x01, 0x01, 0x05, 0x00, 0x03, 0x82, 0x01, 0x0f, 0x00, 0x30, 0x82, 0x01,
  0x0a, 0x02, 0x82, 0x01, 0x01, 0x00, 0xda, 0xcc, 0x18, 0x63, 0x30, 0xfd,
  0xf4, 0x17, 0x23, 0x1a, 0x56, 0x7e, 0x5b, 0xdf, 0x3c, 0x6c, 0x38, 0xe4,
  0x71, 0xb7, 0x78, 0x91, 0xd4, 0xbc, 0xa1, 0xd8, 0x4c, 0xf8, 0xa8, 0x43,
  0xb6, 0x03, 0xe9, 0x4d, 0x21, 0x07, 0x08, 0x88, 0xda, 0x58, 0x2f, 0x66,
  0x39, 0x29, 0xbd, 0x05, 0x78, 0x8b, 0x9d, 0x38, 0xe8, 0x05, 0xb7, 0x6a,
  0x7e, 0x71, 0xa4, 0xe6, 0xc4, 0x60, 0xa6, 0xb0, 0xef, 0x80, 0xe4, 0x89,
  0x28, 0x0f, 0x9e, 0x25, 0xd6, 0xed, 0x83, 0xf3, 0xad, 0xa6, 0x91, 0xc7,
  0x98, 0xc9, 0x42, 0x18, 0x35, 0x14, 0x9d, 0xad, 0x98, 0x46, 0x92, 0x2e,
  0x4f, 0xca, 0xf1, 0x87, 0x43, 0xc1, 0x16, 0x95, 0x57, 0x2d, 0x50, 0xef,
  0x89, 0x2d, 0x80, 0x7a, 0x57, 0xad, 0xf2, 0xee, 0x5f, 0x6b, 0xd2, 0x00,
  0x8d, 0xb9, 0x14, 0xf8, 0x14, 0x15, 0x35, 0xd9, 0xc0, 0x46, 0xa3, 0x7b,
  0x72, 0xc8, 0x91, 0xbf, 0xc9, 0x55, 0x2b, 0xcd, 0xd0, 0x97, 0x3e, 0x9c,
  0x26, 0x64, 0xcc, 0xdf, 0xce, 0x83, 0x19, 0x71, 0xca, 0x4e, 0xe6, 0xd4,
  0xd5, 0x7b, 0xa9, 0x19, 0xcd, 0x55, 0xde, 0xc8, 0xec, 0xd2, 0x5e, 0x38,
  0x53, 0xe5, 0x5c, 0x4f, 0x8c, 0x2d, 0xfe, 0x50, 0x23, 0x36, 0xfc, 0x66,
  0xe6, 0xcb, 0x8e, 0xa4, 0x39, 0x19, 0x00, 0xb7, 0x95, 0x02, 0x39, 0x91,
  0x0b, 0x0e, 0xfe, 0x38, 0x2e, 0xd1, 0x1d, 0x05, 0x9a, 0xf6, 0x4d, 0x3e,
  0x6f, 0x0f, 0x07, 0x1d, 0xaf, 0x2c, 0x1e, 0x8f, 0x60, 0x39, 0xe2, 0xfa,
  0x36, 0x53, 0x13, 0x39, 0xd4, 0x5e, 0x26, 0x2b, 0xdb, 0x3d, 0xa8, 0x14,
  0xbd, 0x32, 0xeb, 0x18, 0x03, 0x28, 0x52, 0x04, 0x71, 0xe5, 0xab, 0x33,
  0x3d, 0xe1, 0x38, 0xbb, 0x07, 0x36, 0x84, 0x62, 0x9c, 0x79, 0xea, 0x16,
  0x30, 0xf4, 0x5f, 0xc0, 0x2b, 0xe8, 0x71, 0x6b, 0xe4, 0xf9, 0x02, 0x03,
  0x01, 0x00, 0x01, 0xa3, 0x53, 0x30, 0x51, 0x30, 0x0f, 0x06, 0x03, 0x55,
  0x1d, 0x13, 0x01, 0x01, 0xff, 0x04, 0x05, 0x30, 0x03, 0x01, 0x01, 0xff,
  0x30, 0x1d, 0x06, 0x03, 0x55, 0x1d, 0x0e, 0x04, 0x16, 0x04, 0x14, 0xc0,
  0x7a, 0x98, 0x68, 0x8d, 0x89, 0xfb, 0xab, 0x05, 0x64, 0x0c, 0x11, 0x7d,
  0xaa, 0x7d, 0x65, 0xb8, 0xca, 0xcc, 0x4e, 0x30, 0x1f, 0x06, 0x03, 0x55,
  0x1d, 0x23, 0x04, 0x18, 0x30, 0x16, 0x80, 0x14, 0xc0, 0x7a, 0x98, 0x68,
  0x8d, 0x89, 0xfb, 0xab, 0x05, 0x64, 0x0c, 0x11, 0x7d, 0xaa, 0x7d, 0x65,
  0xb8, 0xca, 0xcc, 0x4e, 0x30, 0x0d, 0x06, 0x09, 0x2a, 0x86, 0x48, 0x86,
  0xf7, 0x0d, 0x01, 0x01, 0x05, 0x05, 0x00, 0x03, 0x82, 0x01, 0x01, 0x00,
  0x35, 0xe3, 0x29, 0x6a, 0xe5, 0x2f, 0x5d, 0x54, 0x8e, 0x29, 0x50, 0x94,
  0x9f, 0x99, 0x1a, 0x14, 0xe4, 0x8f, 0x78, 0x2a, 0x62, 0x94, 0xa2, 0x27,
  0x67, 0x9e, 0xd0, 0xcf, 0x1a, 0x5e, 0x47, 0xe9, 0xc1, 0xb2, 0xa4, 0xcf,
  0xdd, 0x41, 0x1a, 0x05, 0x4e, 0x9b, 0x4b, 0xee, 0x4a, 0x6f, 0x55, 0x52,
  0xb3, 0x24, 0xa1, 0x37, 0x0a, 0xeb, 0x64, 0x76, 0x2a, 0x2e, 0x2c, 0xf3,
  0xfd, 0x3b, 0x75, 0x90, 0xbf, 0xfa, 0x71, 0xd8, 0xc7, 0x3d, 0x37, 0xd2,
  0xb5, 0x05, 0x95, 0x62, 0xb9, 0xa6, 0xde, 0x89, 0x3d, 0x36, 0x7b, 0x38,
  0x77, 0x48, 0x97, 0xac, 0xa6, 0x20, 0x8f, 0x2e, 0xa6, 0xc9, 0x0c, 0xc2,
  0xb2, 0x99, 0x45, 0x00, 0xc7, 0xce, 0x11, 0x51, 0x22, 0x22, 0xe0, 0xa5,
  0xea, 0xb6, 0x15, 0x48, 0x09, 0x64, 0xea, 0x5e, 0x4f, 0x74, 0xf7, 0x05,
  0x3e, 0xc7, 0x8a, 0x52, 0x0c, 0xdb, 0x15, 0xb4, 0xbd, 0x6d, 0x9b, 0xe5,
  0xc6, 0xb1, 0x54, 0x68, 0xa9, 0xe3, 0x69, 0x90, 0xb6, 0x9a, 0xa5, 0x0f,
  0xb8, 0xb9, 0x3f, 0x20, 0x7d, 0xae, 0x4a, 0xb5, 0xb8, 0x9c, 0xe4, 0x1d,
  0xb6, 0xab, 0xe6, 0x94, 0xa5, 0xc1, 0xc7, 0x83, 0xad, 0xdb, 0xf5, 0x27,
  0x87, 0x0e, 0x04, 0x6c, 0xd5, 0xff, 0xdd, 0xa0, 0x5d, 0xed, 0x87, 0x52,
  0xb7, 0x2b, 0x15, 0x02, 0xae, 0x39, 0xa6, 0x6a, 0x74, 0xe9, 0xda, 0xc4,
  0xe7, 0xbc, 0x4d, 0x34, 0x1e, 0xa9, 0x5c, 0x4d, 0x33, 0x5f, 0x92, 0x09,
  0x2f, 0x88, 0x66, 0x5d, 0x77, 0x97, 0xc7, 0x1d, 0x76, 0x13, 0xa9, 0xd5,
  0xe5, 0xf1, 0x16, 0x09, 0x11, 0x35, 0xd5, 0xac, 0xdb, 0x24, 0x71, 0x70,
  0x2c, 0x98, 0x56, 0x0b, 0xd9, 0x17, 0xb4, 0xd1, 0xe3, 0x51, 0x2b, 0x5e,
  0x75, 0xe8, 0xd5, 0xd0, 0xdc, 0x4f, 0x34, 0xed, 0xc2, 0x05, 0x66, 0x80,
  0xa1, 0xcb, 0xe6, 0x33
};
#ifdef ESP32
  #include <HTTPClient.h>
#else
  #include <ESP8266HTTPClient.h>
#endif

// method must be either "PUT", "POST" or "PATCH". "GET" will not end up returning what is got.
bool FirebaseWrite(HTTPClient* http, const String& method, const String& auth_token, const String& path, const String& json)
{
  String url = FIREBASE_ENDPOINT;
  url += path + F(".json?print=silent&auth=");
  url += auth_token;
  
  #ifdef ESP32
  http->setReuse(true);
  http->useHTTP10(false);
  #else
  http->setReuse(false);
  http->useHTTP10(true);
  #endif
  
  Serial.print(F("curl -X "));
  Serial.print(method);
  
#ifdef ESP32
  Serial.print(F(" -H 'User-Agent: ESP32HTTPClient' -d '"));
  Serial.print(json);
  Serial.print(F("' "));
  Serial.println(url);

  bool result = http->begin(url, GeoTrustCA_cer, sizeof(GeoTrustCA_cer));
  if (!result) {
    Serial.print(F("HTTP begin failed\n"));
    return false;
  }
  http->addHeader(F("User-Agent"), F("ESP32HTTPClient"));
#else
  Serial.print(F(" -H 'User-Agent: ESP8266HTTPClient' -d '"));
  Serial.print(json);
  Serial.print(F("' "));
  Serial.println(url);

  if (!http->begin(url)) {
    Serial.print(F("HTTP begin failed\n"));
    return false;
  }

  if (!http->setRootCA_P((PGM_VOID_P*) GeoTrustCA_cer, sizeof(GeoTrustCA_cer)))
  {
    Serial.print(F("Failed to load cert\n"));
    http->end();
    return false;
  }
  http->addHeader(F("User-Agent"), F("ESP8266HTTPClient"));
#endif

  uint16_t httpCode = http->sendRequest(method.c_str(), json);
  if (httpCode / 100 == 2)
  {
    http->end();
    return true;
  }
  else
  {
    Serial.print(F("HTTP Failure code: "));
    Serial.println(httpCode);
  }

  http->end();
  return false;
}

bool FirebaseStream(HTTPClient** http, const String& auth_token, const String& path)
{
  HTTPClient* firestream = *http;
  String url = FIREBASE_ENDPOINT;
  url += path + F(".json?auth=");
  url += auth_token;

  if (firestream != 0) {
    #ifdef ESP32
    firestream->setReuse(true);
    #else
    firestream->setReuse(false);
    #endif
    firestream->end();
  }
  
#ifdef ESP32
    bool result = firestream->begin(url, GeoTrustCA_cer, sizeof(GeoTrustCA_cer));
    if (!result) {
      Serial.print(F("HTTP begin failed\n"));
      return false;
    }
#else
  if (!firestream->begin(url)) {
    Serial.print(F("HTTP begin failed\n"));
    return false;
  }

  if (!firestream->setRootCA_P((PGM_VOID_P*) GeoTrustCA_cer, sizeof(GeoTrustCA_cer)))
  {
    Serial.print(F("Failed to load cert\n"));
    firestream->end();
    return false;
  }
#endif
  firestream->addHeader(F("Accept"), F("text/event-stream"));
  const char* headers[] = {"Location"};
  firestream->collectHeaders(headers, 1);

  int status = firestream->GET();
  while (status == 307) {
    String location = firestream->header("Location");
    #ifdef ESP32
    firestream->setReuse(true);
    #else
    firestream->setReuse(false);
    #endif
    firestream->end();
#ifndef ESP32
    delete firestream;
    *http = firestream = new HTTPClient();
    firestream->setReuse(false);
    firestream->useHTTP10(true);
#endif

#ifdef ESP32
    bool result = firestream->begin(url, GeoTrustCA_cer, sizeof(GeoTrustCA_cer));
    if (!result) {
      Serial.print(F("HTTP begin failed\n"));
      return false;
    }
#else
    firestream->begin(location);

    if (!firestream->setRootCA_P((PGM_VOID_P*) GeoTrustCA_cer, sizeof(GeoTrustCA_cer)))
    {
      Serial.print(F("Failed to load cert\n"));
      firestream->end();
      return false;
    }
#endif
    status = firestream->GET();
  }
  if (status / 100 != 2) {
    Serial.print(F("ERROR: Failed to stream "));
    Serial.println(url);
    Serial.print(F("Http result: "));
    Serial.println(status);
    firestream->end();
#ifndef ESP32
    delete firestream;
    *http = firestream = new HTTPClient();
    firestream->setReuse(false);
    firestream->useHTTP10(true);
#endif
    return false;
  }
  if (firestream->getStreamPtr() == 0) {
    Serial.print(F("Stream not initialized for some reason\n"));
    firestream->end();
    return false;
  }
  return true;
}