use name to define route name for different methods on same url

sanic/router.py

@@ -67,6 +67,7 @@ class Router:
 
     def __init__(self):
         self.routes_all = {}
+        self.routes_names = {}
         self.routes_static = {}
         self.routes_dynamic = defaultdict(list)
         self.routes_always_check = []
@@ -125,13 +126,12 @@ class Router:
 
         # Add versions with and without trailing /
         slash_is_missing = (
-            not uri[-1] == '/'
-            and not self.routes_all.get(uri + '/', False)
+            not uri[-1] == '/' and not self.routes_all.get(uri + '/', False)
         )
         without_slash_is_missing = (
-            uri[-1] == '/'
-            and not self.routes_all.get(uri[:-1], False)
-            and not uri == '/'
+            uri[-1] == '/' and not
+            self.routes_all.get(uri[:-1], False) and not
+            uri == '/'
         )
         # add version with trailing slash
         if slash_is_missing:
@@ -229,22 +229,26 @@ class Router:
         else:
             route = self.routes_all.get(uri)
 
+        # prefix the handler name with the blueprint name
+        # if available
+        if hasattr(handler, '__blueprintname__'):
+            handler_name = '{}.{}'.format(
+                handler.__blueprintname__, name or handler.__name__)
+        else:
+            handler_name = name or getattr(handler, '__name__', None)
+
         if route:
             route = merge_route(route, methods, handler)
         else:
-            # prefix the handler name with the blueprint name
-            # if available
-            if hasattr(handler, '__blueprintname__'):
-                handler_name = '{}.{}'.format(
-                    handler.__blueprintname__, name or handler.__name__)
-            else:
-                handler_name = name or getattr(handler, '__name__', None)
-
             route = Route(
                 handler=handler, methods=methods, pattern=pattern,
                 parameters=parameters, name=handler_name, uri=uri)
 
         self.routes_all[uri] = route
+        pairs = self.routes_names.get(handler_name)
+        if not (pairs and (pairs[0] + '/' == uri or uri + '/' == pairs[0])):
+            self.routes_names[handler_name] = (uri, route)
+
         if properties['unhashable']:
             self.routes_always_check.append(route)
         elif parameters:
@@ -265,6 +269,11 @@ class Router:
             uri = host + uri
         try:
             route = self.routes_all.pop(uri)
+            for handler_name, pairs in self.routes_names.items():
+                if pairs[0] == uri:
+                    self.routes_names.pop(handler_name)
+                    break
+
         except KeyError:
             raise RouteDoesNotExist("Route was not registered: {}".format(uri))
 
@@ -289,11 +298,7 @@ class Router:
         if not view_name:
             return (None, None)
 
-        for uri, route in self.routes_all.items():
-            if route.name == view_name:
-                return uri, route
-
-        return (None, None)
+        return self.routes_names.get(view_name, (None, None))
 
     def get(self, request):
         """Get a request handler based on the URL of the request, or raises an