made suggested changes after PR review

config.ini

@@ -5,5 +5,5 @@ server_host = 127.0.0.1
 server_port = 8081
 
 [app]
-user_data = sample_file.txt
-meta_data = meta_data_extra.txt
+user_data = user-data.txt
+meta_data = meta-data.txt

data/localhost/meta-data.txt

@@ -0,0 +1 @@
+suspended:httpd

data/localhost/metadata_extra/meta_data_extra.txt

@@ -1 +0,0 @@
-suspend_cmd:suspend

main.py

@@ -3,7 +3,7 @@ import sys
 
 import cherrypy
 from cherrypy.lib.static import serve_file
-import json
+import yaml
 import socket
 
 import configparser
@@ -18,36 +18,56 @@ meta_data_filename = config["app"].get("meta_data", "meta_data_extra.txt")
 
 
 class MainApp:
+    def __init__(self, *args):
+        self._init_ip()
+
+    def _init_ip(self):
+        """
+        Get remote IP
+        """
+        try:
+            self.remoteip = cherrypy.request.headers.get(
+                'X-Real-Ip',
+                cherrypy.request.remote.ip
+            )
+        except:
+            self.remoteip = cherrypy.request.remote.ip
+
+        self.hostinfo = socket.gethostbyaddr(self.remoteip)
+
     @cherrypy.expose
     def user_data(self):
-        hostname = socket.gethostbyaddr(str(cherrypy.request.remote.ip))[0]
-        filename = user_data_filename
-        filepath = os.path.join(PATH, "data", hostname, "user-data", filename)
-
+        """
+        Serves a static file
+        """
+        filepath = os.path.join(PATH, "data", user_data_filename)
         return serve_file(filepath, "application/x-download", "attachment")
 
     @cherrypy.expose
-    @cherrypy.tools.json_out()
     def meta_data(self):
-        host_info = socket.gethostbyaddr(str(cherrypy.request.remote.ip))
-        hostname = host_info[0]
+        """
+        Return meta-data in YAML
+        """
+        hostname =self.hostinfo[0]
         data = {"instance-id": hostname.split(".")[0], "local-hostname": hostname}
 
-        folder = os.path.join(PATH, "data", hostname, "metadata_extra")
-        if os.path.exists(folder):
-            with open(os.path.join(folder, meta_data_filename), "r") as f:
-                lines = f.readlines()
-
-            for line in lines:
+        filepath = os.path.join(PATH, "data", hostname, meta_data_filename)
+        if os.path.exists(filepath):
+            with open(filepath, "r") as f:
+                line = f.readlines()[0]
                 ls = list(map(lambda k: k.strip(), line.split(":")))
                 data[ls[0]] = ls[1]
 
-        return data
+        return yaml.dump(data)
 
     @cherrypy.expose
     def finished(self, data):
-        hostname = socket.gethostbyaddr(str(cherrypy.request.remote.ip))[0]
-        folder = os.path.join(PATH, "data", hostname, "metadata_extra")
+        """
+        Saves additional meta-data
+
+        :param data: meta-data to be added
+        """
+        folder = os.path.join(PATH, "data", self.hostinfo[0])
         if not os.path.exists(folder):
             os.makedirs(folder)