Added better debug info

sanic/exceptions.py

@@ -1,14 +1,19 @@
-from .response import html
+from .response import text
+from traceback import format_exc
 
-class NotFound(Exception):
+class SanicException(Exception):
+	pass
+
+class NotFound(SanicException):
 	status_code = 404
-class InvalidUsage(Exception):
+class InvalidUsage(SanicException):
 	status_code = 400
-class ServerError(Exception):
+class ServerError(SanicException):
 	status_code = 500
 
 class Handler:
 	handlers = None
+	debug = False
 	def __init__(self):
 		self.handlers = {}
 
@@ -20,9 +25,14 @@ class Handler:
 		if handler:
 			response = handler(request, exception)
 		else:
-			response = Handler.default(request, exception)
+			response = Handler.default(request, exception, self.debug)
 		return response
 
 	@staticmethod
-	def default(request, exception):
-		return html("Error: {}".format(exception), status=getattr(exception, 'status_code', 500))
+	def default(request, exception, debug):
+		if issubclass(type(exception), SanicException):
+			return text("Error: {}".format(exception), status=getattr(exception, 'status_code', 500))
+		elif debug:
+			return text("Error: {}\nException: {}".format(exception, format_exc()), status=500)
+		else:
+			return text("An error occurred while generating the request", status=500)

sanic/sanic.py

@@ -6,6 +6,7 @@ from .log import log
 
 class Sanic:
     name = None
+    debug = None
     router = None
     error_handler = None
     routes = []
@@ -15,15 +16,21 @@ class Sanic:
         self.router = router or Router()
         self.error_handler = error_handler or Handler()
 
-    def route(self, *args, **kwargs):
+    def route(self, uri):
         def response(handler):
-            self.add_route(handler, *args, **kwargs)
+            self.router.add(uri=uri, handler=handler)
             return handler
 
         return response
 
-    def add_route(self, handler, *args, **kwargs):
-        self.router.add(*args, **kwargs, handler=handler)
+    def handler(self, *args, **kwargs):
+        def response(handler):
+            self.error_handler.add(*args, **kwargs)
+            return handler
+
+        return response
 
     def run(self, host="127.0.0.1", port=8000, debug=False):
+        self.error_handler.debug=True
+        self.debug = debug
         return serve(sanic=self, host=host, port=port, debug=debug)

sanic/server.py

@@ -8,6 +8,7 @@ import logging
 from inspect import iscoroutine
 from ujson import loads as json_loads
 from urllib.parse import parse_qs
+from traceback import format_exc
 
 import httptools
 try:
@@ -157,7 +158,10 @@ class HttpProtocol(asyncio.Protocol):
             try:
                 response = self.sanic.error_handler.response(request, e)
             except Exception as e:
-                response = HTTPResponse("Error while handling error: {}".format(e))
+                if self.sanic.debug:
+                    response = HTTPResponse("Error while handling error: {}\nStack: {}".format(e, format_exc()))
+                else:
+                    response = HTTPResponse("An error occured while handling an error")
         
         self.write_response(request, response)
 

test.py

@@ -28,4 +28,4 @@ def test(request):
 def test(request):
     return json({ "parsed": True, "args": request.args, "url": request.url, "query_string": request.query_string })
 
-app.run(host="0.0.0.0")
+app.run(host="0.0.0.0", debug=True)