Refactor: Skip socket resolution, load device hostname/IP directly from file

- Remove socket.gethostname() and socket.gethostbyname() calls
- Device info now loads exclusively from device_info.txt
- Device hostname and IP are independent of server hostname
- Resolves DNS/socket errors on startup
- Device info file is primary config source for device identity

data/device_info.txt

@@ -1,2 +1,2 @@
-TestLinux
+RPI-Device
-127.0.1.1
+192.168.1.100

device_module.py

@@ -1,85 +1,53 @@
 """
 Device information management
-Handles hostname, IP address, and device configuration
+Handles hostname and IP address of the device
+Uses file-based configuration for reliability
 """
 
-import socket
 import os
 from config_settings import DEVICE_INFO_FILE
 
 
 def get_device_info():
     """
-    Get hostname and device IP with file-based fallback
+    Get device hostname and IP from configuration file
     Returns tuple: (hostname, device_ip)
+    
+    The hostname and IP are read from device_info.txt which should be
+    configured with the device's own hostname and IP address.
     """
     hostname = None
     device_ip = None
     
-    # Try to get current hostname and IP
+    # Load device info from file (primary method - no socket resolution)
-    try:
-        hostname = socket.gethostname()
-        device_ip = socket.gethostbyname(hostname)
-        print(f"Successfully resolved - Hostname: {hostname}, IP: {device_ip}")
-        
-        # Save the working values to file for future fallback
     try:
         os.makedirs(os.path.dirname(DEVICE_INFO_FILE), exist_ok=True)
-            with open(DEVICE_INFO_FILE, "w") as f:
-                f.write(f"{hostname}\n{device_ip}\n")
-            print(f"Saved device info to {DEVICE_INFO_FILE}")
-        except Exception as e:
-            print(f"Warning: Could not save device info to file: {e}")
-            
-        return hostname, device_ip
-        
-    except socket.gaierror as e:
-        print(f"Socket error occurred: {e}")
-        print("Attempting to load device info from file...")
-        
-        # Try to load from file
-        try:
         with open(DEVICE_INFO_FILE, "r") as f:
             lines = f.read().strip().split('\n')
             if len(lines) >= 2:
                 hostname = lines[0].strip()
                 device_ip = lines[1].strip()
-                    print(f"Loaded from file - Hostname: {hostname}, IP: {device_ip}")
+                print(f"Device Info - Hostname: {hostname}, IP: {device_ip}")
                 return hostname, device_ip
             else:
-                    print("File exists but doesn't contain valid data")
+                print(f"Warning: {DEVICE_INFO_FILE} exists but lacks valid data")
     except FileNotFoundError:
-            print(f"No fallback file found at {DEVICE_INFO_FILE}")
+        print(f"Device info file not found at {DEVICE_INFO_FILE}")
     except Exception as e:
-            print(f"Error reading fallback file: {e}")
+        print(f"Error reading device info file: {e}")
     
-    except Exception as e:
+    # Fallback if file doesn't exist or has issues
-        print(f"Unexpected error getting device info: {e}")
+    print("Using default device values")
+    hostname = "prezenta-device"
+    device_ip = "192.168.1.100"
     
-        # Try to load from file as fallback
+    # Create file with default values for future use
-        try:
-            with open(DEVICE_INFO_FILE, "r") as f:
-                lines = f.read().strip().split('\n')
-                if len(lines) >= 2:
-                    hostname = lines[0].strip()
-                    device_ip = lines[1].strip()
-                    print(f"Loaded from file after error - Hostname: {hostname}, IP: {device_ip}")
-                    return hostname, device_ip
-        except Exception as file_error:
-            print(f"Could not load from file: {file_error}")
-    
-    # Final fallback if everything fails
-    print("All methods failed - Using default values")
-    hostname = hostname or "unknown-device"
-    device_ip = "127.0.0.1"
-    
-    # Try to save these default values for next time
     try:
         os.makedirs(os.path.dirname(DEVICE_INFO_FILE), exist_ok=True)
         with open(DEVICE_INFO_FILE, "w") as f:
             f.write(f"{hostname}\n{device_ip}\n")
-        print(f"Saved fallback values to {DEVICE_INFO_FILE}")
+        print(f"Created device info file with defaults: {hostname}, {device_ip}")
     except Exception as e:
-        print(f"Could not save fallback values: {e}")
+        print(f"Warning: Could not create device info file: {e}")
     
     return hostname, device_ip