Read all response from API when sending image

Author: rusboard

examples/ESP8266/SendPhoto/PhotoFromFileID/PhotoFromFileID.ino

@@ -7,6 +7,7 @@
 #include <ESP8266WiFi.h>
 #include <WiFiClientSecure.h>
 #include <UniversalTelegramBot.h>
+#include <ArduinoJson.h>
 
 // Initialize Wifi connection to the router
 char ssid[] = "XXXXXX";     // your network SSID (name)
@@ -35,8 +36,18 @@ void handleNewMessages(int numNewMessages) {
     if (from_name == "") from_name = "Guest";
 
     if (text == "/get_test_photo") {
-      String file_id = bot.sendPhoto(chat_id, test_photo_url, "This photo was sent using URL");
-      bot.sendPhoto(chat_id, file_id, "This photo was sent using File ID");
+      String response = bot.sendPhoto(chat_id, test_photo_url, "This photo was sent using URL");
+
+      DynamicJsonBuffer jsonBuffer;
+      JsonObject& images = jsonBuffer.parseObject(response);
+
+      // There are 3 image sizes after Telegram has process photo
+      // You may choose what you want, in example was choosed bigger size
+      String file_id = images["result"]["photo"][2]["file_id"];
+
+      if (file_id) {
+        bot.sendPhoto(chat_id, file_id, "This photo was sent using File ID");
+      }
     }
 
     if (text == "/start") {

src/UniversalTelegramBot.cpp

@@ -491,12 +491,7 @@ String UniversalTelegramBot::sendPostPhoto(JsonObject& payload)  {
     }
   }
 
-  if(sent)
-  {
-    return extractFileIdFromResponse(response);
-  }
-
-  return "";
+  return response;
 }
 
 String UniversalTelegramBot::sendPhotoByBinary(String chat_id, String contentType, int fileSize,
@@ -549,16 +544,6 @@ String UniversalTelegramBot::sendPhoto(String chat_id, String photo, String capt
   return sendPostPhoto(payload);
 }
 
-String UniversalTelegramBot::extractFileIdFromResponse(String response) {
-  int indexOfFileId = response.lastIndexOf("\"file_id\":\"");
-  if(indexOfFileId > -1){
-    // 11 is the length of "file_id":""
-    // 55 is the length of the file_id
-    return response.substring(indexOfFileId + 11, indexOfFileId + 11 + 55);
-  }
-  return "";
-}
-
 bool UniversalTelegramBot::checkForOkResponse(String response) {
   int responseLength = response.length();
 

src/UniversalTelegramBot.h

@@ -85,7 +85,6 @@ class UniversalTelegramBot
     Client *client;
     const int maxMessageLength = 1300;
     bool checkForOkResponse(String response);
-    String extractFileIdFromResponse(String response);
     bool _debug = false;
 };