Some improvements

main.py

@@ -1,6 +1,7 @@
 import cgi
 import datetime
 import pytz
+import html
 
 import workers.conn
 import workers.val
@@ -20,16 +21,18 @@ HTML = "text/html"
 JSON = "application/json"
 XML = "text/xml"
 
+DOCSTR = ' Check out the <a href="https://kumig.it/kumitterer/oebb_py#request">documentation</a> for usage instructions.'
+
 def doConn(req):
  try:
   getfrm = req.cfrm if "cfrm" in dir(req) and req.cfrm else req.args["from"][0] if "from" in req.args else None
   getto = req.cto if "cto" in dir(req) and req.cto else req.args["to"][0] if "to" in req.args else None
   try:
-   frm = getfrm.encode("latin-1").decode("utf-8")
-   to = getto.encode("latin-1").decode("utf-8")
+   frm = html.unescape(getfrm.encode("latin-1").decode("utf-8"))
+   to = html.unescape(getto.encode("latin-1").decode("utf-8"))
   except UnicodeDecodeError:
-   frm = getfrm
-   to = getto
+   frm = html.unescape(getfrm)
+   to = html.unescape(getto)
 
   if not frm or not to:
    raise ValueError()
@@ -218,9 +221,9 @@ def application(env, re):
    res = doNot(req)
 
  except IllegalMethodException as e:
-  res = Response(HTTP405, HTML, str(e))
+  res = Response(HTTP405, HTML, str(e) + DOCSTR)
  except InvalidArgumentException as e:
-  res = Response(HTTP400, HTML, str(e))
+  res = Response(HTTP400, HTML, str(e) + DOCSTR)
   
  re(res.status, [("Content-Type", res.ctype)])
  yield res.content.encode()