Use route_path instead of route_url

I'm hoping (but haven't yet confirmed) that this will let the thing work
when I use nginx as a reverse proxy -- until now, when I do that, the
short URLs look like http://localhost:8080/xyzzy, even though the
public-facing website is http://eensy.teensy.info.

tinyurl/templates/homepage.mak

@@ -22,7 +22,7 @@
         <div class="row" style="margin-bottom: 5rem;">
           <div class="col-md-12">
             <div class="text-center">
-              <form action="${request.route_url('shorten')}" method="get" style="margin-bottom: 2rem;">
+              <form action="${request.route_path('shorten')}" method="get" style="margin-bottom: 2rem;">
                 <input type="text" id="input_url" name="input_url" placeholder="Type a URL here, yo"/>
                 <input type="submit" value="Tiny-ify it"/>
               </form>

tinyurl/views.py

@@ -22,12 +22,14 @@
 
 logger = logging.getLogger ('tinyurl')
 
+
 def truncate(string, maxlen):
     suffix = '...'
     if len(string) > maxlen:
         return string[:maxlen] + suffix
     return string
 
+
 def _recent_entries(session, request):
     now = datetime.datetime.now(pytz.utc)
 
@@ -44,10 +46,11 @@ def _recent_entries(session, request):
         yield dict(
             age        = age,
             human_hash = e.human_hash,
-            short_url  = request.route_url ('lengthen', human_hash=e.human_hash),
+            short_url  = request.route_path ('lengthen', human_hash=e.human_hash),
             long_url   = e.long_url
         )
 
+
 @view_config(route_name='home', request_method='GET')
 def home_GET(request):
     session = DBSession()
@@ -79,6 +82,7 @@ def render(request, value):
     r.content_type = 'text/plain'
     return r
 
+
 @view_config(route_name='shorten', request_method='GET')
 def create_GET(request):
     session = DBSession()
@@ -100,7 +104,7 @@ def create_GET(request):
         DBSession.add(HashModel(human_hash=human_hash,
                                 long_url=long_url))
 
-    short_url = request.route_url ('lengthen', human_hash=human_hash)
+    short_url = request.route_path ('lengthen', human_hash=human_hash)
 
     return render(request,
                   {