Use configurable imagepath url

This allows images to be hosted externally, removing the need to do
image handling in vmmd.

vmmd

@@ -1391,7 +1391,7 @@ class HttpClientRequestHandler(http.server.BaseHTTPRequestHandler):
         r += ' <table width="100%">\n'
         r += '  <tr>\n'
         r += '   <td width="33%">&nbsp;\n'
-        r += '   <td width="33%" align="center"><img src="/ui/vmm.jpg" alt="logo">\n'
+        r += "   <td width=\"33%%\" align=\"center\"><img src=\"%s/logo.jpg\" alt=\"logo\">\n" % (config['ui.imagepath'])
         if user:
             r += "   <td width=\"33%%\" align=\"right\" valign=\"top\">%s<br><a style=\"text-decoration:none\" href=\"/ui/logout\">logout</a>\n" % (user.fullname())
         else:
@@ -1464,21 +1464,6 @@ class HttpClientRequestHandler(http.server.BaseHTTPRequestHandler):
         r += '</select>'
         return r
 
-    def logo_image(self):
-        buf = b''
-        try:
-            f = open('/etc/vmm/logo.jpg', 'rb') # XXX: usr/lib/vmm or usr/share or ...
-            buf = f.read()
-            f.close()
-        except BaseException as e:
-            print("Failed to open image: %s" % (e))
-            pass
-        self.send_response(200)
-        self.send_header('Content-Type', 'image/jpeg')
-        self.send_header('Content-Length', len(buf))
-        self.end_headers()
-        self.wfile.write(buf)
-
     def ui_login(self, user, args):
         msg = None
         if 'username' in args and 'password' in args:
@@ -2157,9 +2142,6 @@ class HttpClientRequestHandler(http.server.BaseHTTPRequestHandler):
             self._send_response(500, None, r)
 
     def do_GET(self):
-        if self.path == '/ui/vmm.jpg':
-            self.logo_image()
-            return
         self._handle_request()
 
     def do_POST(self):
@@ -2306,6 +2288,8 @@ config_defaults = {
     'http.listen.address': '127.0.0.1',
     'http.listen.port': 8080,
 
+    'ui.imagepath': 'https://www.nwwn.com/vmm/images',
+
     'iso.storage.location': '/var/lib/vmm/isos',
     'image.storage.location': '/var/lib/vmm/images',