added 3 urls /user-data, /meta-data, and /finished for Serving Static Content

config.ini

@@ -0,0 +1,9 @@
+
+
+[server]
+server_host = 127.0.0.1
+server_port = 8081
+
+[app]
+user_data = sample_file.txt
+meta_data = meta_data_extra.txt

data/localhost/metadata_extra/meta_data_extra.txt

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

data/localhost/user-data/sample_file.txt

@@ -0,0 +1,2 @@
+This is a sample static file to be served
+from cherrypy server at user-data url.

main.py

@@ -0,0 +1,75 @@
+import os
+import sys
+
+import cherrypy
+from cherrypy.lib.static import serve_file
+import json
+import socket
+
+import configparser
+
+PATH = os.path.dirname(os.path.abspath(__file__))
+
+config = configparser.ConfigParser()
+config.read("config.ini")
+
+user_data_filename = config["app"].get("user_data", "sample_file.txt")
+meta_data_filename = config["app"].get("meta_data", "meta_data_extra.txt")
+
+
+class MainApp:
+    @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)
+
+        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]
+        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:
+                ls = list(map(lambda k: k.strip(), line.split(":")))
+                data[ls[0]] = ls[1]
+
+        return 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")
+        if not os.path.exists(folder):
+            os.makedirs(folder)
+
+        with open(os.path.join(folder, meta_data_filename), "w") as f:
+            f.write(data)
+
+
+ROOT = MainApp()
+
+if __name__ == "__main__":
+    cherrypy.server.socket_host = config["server"].get("server_host", "127.0.0.1")
+    cherrypy.server.socket_port = config["server"].getint("server_port", 8081)
+    ENGINE = cherrypy.engine
+
+    cherrypy.tree.mount(ROOT)
+    if hasattr(ENGINE, "signal_handler"):
+        ENGINE.signal_handler.subscribe()
+    if hasattr(ENGINE, "console_control_handler"):
+        ENGINE.console_control_handler.subscribe()
+    try:
+        ENGINE.start()
+    except Exception:
+        sys.exit(1)
+    else:
+        ENGINE.block()