feature: lookup camera hostname just once

CHANGELOG

@@ -0,0 +1,7 @@
+1.0.1
+  - lookup camera hostnames to get ip at config, so we aren't don't
+    100k lookups every day (in my 4 camera setup)
+
+1.0.0
+  - initial release
+

VERSION

@@ -1 +1 @@
-1.0.0
+1.0.1

amcrest_api.py

@@ -61,7 +61,13 @@ class AmcrestAPI(object):
 
     async def get_device(self, host, device_name):
         try:
-            camera = self.get_camera(host)
+            # resolve host and setup camera by ip so we aren't making 100k DNS lookups per day
+            try:
+                host_ip = get_ip_address(host)
+                self.logger.info(f'nslookup {host} got us {host_ip}')
+                camera = self.get_camera(host_ip)
+            except Exception as err:
+                self.logger.error(f'Failed to resolve {host} to ip address: {err}')
 
             device_type = camera.device_type.replace('type=', '').strip()
             is_ad110 = device_type == 'AD110'
@@ -89,6 +95,7 @@ class AmcrestAPI(object):
                 'camera': camera,
                 'config': {
                     'host': host,
+                    'host_ip': host_ip,
                     'device_name': device_name,
                     'device_type': device_type,
                     'device_class': camera.device_class,

util.py

@@ -5,7 +5,9 @@
 #
 # The software is provided 'as is', without any warranty.
 
+import ipaddress
 import os
+import socket
 
 # Helper functions and callbacks
 def read_file(file_name):
@@ -22,3 +24,18 @@ def read_version():
 
 def to_gb(total):
     return str(round(float(total[0]) / 1024 / 1024 / 1024, 2))
+
+def is_ipv4(string):
+        try:
+            ipaddress.IPv4Network(string)
+            return True
+        except ValueError:
+            return False
+
+def get_ip_address(string):
+    if is_ipv4(string):
+        return string
+    for i in socket.getaddrinfo(string, 0):
+        if i[0] is socket.AddressFamily.AF_INET and i[1] is socket.SocketKind.SOCK_RAW:
+            return i[4][0]
+    raise Exception(f'failed to find ip address for {string}')