Stream data using Firebase Realtime Database rest api with nodeMCU client

Question

I have data on firebase rtdb, which i want to listen in my nodemcu. I know there are libraries available like this one which provides listeners, but i want to do it using REST API streaming as mentioned in firebase documentation for rest api streaming. So far i have successfully tested with curl on cmd as shown

My curl command is:

curl -v https://<name of rtdb>.firebaseio.com/SD0001/Up.json -H "Accept:text/event-stream"

I want to do the same thing on ESP8266 using ESP8266HTTPClient library. The firebase documentation states "Set the client's Accept header to text/event-stream" (which i added in header), "Respect HTTP Redirects, in particular HTTP status code 307" (which i am still struggling).

So far, my code is somewhat like this

#include <ESP8266WiFi.h>
#include <ESP8266HTTPClient.h>
#include <WiFiClientSecureBearSSL.h>
const uint8_t fingerprint[20] = {<<<<fingerprint of rtdb database>>>>};
HTTPClient https;
std::unique_ptr<BearSSL::WiFiClientSecure>client(new BearSSL::WiFiClientSecure);
void setup()
{
 Serial.begin(115200);
 WiFi.begin("SSID", "PASSWORD");
 while (WiFi.status() != WL_CONNECTED)
 {
 delay(500);
 Serial.print(".");
 }
 Serial.println("");
 Serial.println("WiFi connected");
 Serial.println("IP address: ");
 Serial.println(WiFi.localIP()); // successful Connection of ESP8266,
 client->setFingerprint(fingerprint);
 if (https.begin(*client, "https://<name of rtdb>.firebaseio.com/SD0001/Up.json"))
 {
 https.addHeader("Accept", "text/event-stream", false, true);
 https.setFollowRedirects(HTTPC_FORCE_FOLLOW_REDIRECTS);
 int httpCode = https.GET();
 Serial.println(httpCode);
 Serial.println(https.getString()); 
 // Serial.println(https.getLocation());
 // Serial.println(https.header("Location"));
 //https.end();
 }
}
void loop()
{
 // Serial.println(https.getStream());
 // Serial.println(https.getString());
 // Serial.println(https.getLocation());
 // delay(1000);
}

My code GETs the respone with 200 code, but there is no "Location" to redirect in the response header (at least i can't find any). Should i do http GET in the loop everytime? If so, where will i get my redirection url? It would be really helpful if any solution is provided or any documentation to guide me in the right way.

Edit: I have put the text versions of curl command and the code in the post alongwith the screenshots. This is my first post here, so please bear with me.

• jsotola: please remove the screenshot of the code and replace it with the code text ... do the same with the first screenshot also
• aryan: @jsotola i have put the actual code in text form. Please look into it. any help is appreciated as i am completely at sea here