replaced all flask references with quart references

quart_discord/exceptions.py

@@ -0,0 +1,48 @@
+import json
+
+
+class HttpException(Exception):
+    """Base Exception class representing a HTTP exception."""
+
+
+class RateLimited(HttpException):
+    """A HTTP Exception raised when the application is being rate limited.
+    It provides the ``response`` attribute which can be used to get more details of the actual response from
+    the Discord API with few more shorthands to ``response.json()``.
+
+    Attributes
+    ----------
+    response : requests.Response
+        The actual response object received from Discord API.
+    json : dict
+        The actual JSON data received. Shorthand to ``response.json()``.
+    message : str
+        A message saying you are being rate limited.
+    retry_after : int
+        The number of milliseconds to wait before submitting another request.
+    is_global : bool
+        A value indicating if you are being globally rate limited or not
+
+    """
+
+    def __init__(self, response):
+        self.response = response
+        try:
+            self.json = self.response.json()
+        except json.JSONDecodeError:
+            self.json = dict()
+            self.message = self.response.text
+        else:
+            self.message = self.json["message"]
+            self.is_global = self.json["global"]
+            self.retry_after = self.json["retry_after"]
+        finally:
+            super().__init__(self.message)
+
+
+class Unauthorized(HttpException):
+    """A HTTP Exception raised when user is not authorized."""
+
+
+class AccessDenied(HttpException):
+    """Exception raised when user cancels OAuth authorization grant."""