Set up a custom 404 redirect to the OpenPATH page

Instead of a weird 404 page.
Since this is approved by NREL comms, we don't need any other 404 or index page for now

conf/net/api/webserver.conf.sample

@@ -3,7 +3,8 @@
     "static_path" : "webapp/www/",
     "python_path" : "main",
     "log_base_dir" : ".",
-    "log_file" : "debug.log"
+    "log_file" : "debug.log",
+    "404_redirect": "https://www.nrel.gov/transportation/openpath.html"
   },
   "__comment" : "Fill this in for the production server. port will almost certainly be 80 or 443. For iOS, using localhost allows you to test without an internet connection. For AWS and android, make sure that the host 0.0.0.0, localhost does not seem to work",
   "server" : {

emission/net/api/cfc_webapp.py

@@ -10,7 +10,7 @@
 from past.utils import old_div
 import json
 from random import randrange
-from emission.net.api.bottle import route, post, get, run, template, static_file, request, app, HTTPError, abort, BaseRequest, JSONPlugin, response
+from emission.net.api.bottle import route, post, get, run, template, static_file, request, app, HTTPError, abort, BaseRequest, JSONPlugin, response, error, redirect
 import emission.net.api.bottle as bt
 # To support dynamic loading of client-specific libraries
 import sys
@@ -58,6 +58,8 @@
     logging.debug("webserver not configured, falling back to sample, default configuration")
     config_file = open('conf/net/api/webserver.conf.sample')
 
+OPENPATH_URL="https://www.nrel.gov/transportation/openpath.html"
+
 config_data = json.load(config_file)
 config_file.close()
 static_path = config_data["paths"]["static_path"]
@@ -68,6 +70,8 @@
 log_base_dir = config_data["paths"]["log_base_dir"]
 auth_method = config_data["server"]["auth"]
 aggregate_call_auth = config_data["server"]["aggregate_call_auth"]
+# not_found_redirect = "foo" if len(config_data["paths"]) == 5 else "bar"
+not_found_redirect = config_data["paths"]["404_redirect"] if "404_redirect" in config_data["paths"] else OPENPATH_URL
 
 BaseRequest.MEMFILE_MAX = 1024 * 1024 * 1024 # Allow the request size to be 1G
 # to accomodate large section sizes
@@ -395,6 +399,11 @@ def habiticaProxy():
                                     method_args)
 # Data source integration END
 
+@error(404)
+def error404(error):
+    response.status = 301
+    response.set_header('Location', "https://www.nrel.gov/transportation/openpath.html")
+
 @app.hook('before_request')
 def before_request():
   print("START %s %s %s" % (datetime.now(), request.method, request.path))