add support for error handling

Author: dibyadas

python_http_client/__init__.py

@@ -1 +1,2 @@
 from .client import Client
+from .exceptions import *

python_http_client/client.py

@@ -1,14 +1,16 @@
 """HTTP Client library"""
 import json
-
+from .exceptions import handle_error
 
 try:
     # Python 3
     import urllib.request as urllib
     from urllib.parse import urlencode
+    from urllib.error import HTTPError
 except ImportError:
     # Python 2
     import urllib2 as urllib
+    from urllib2 import HTTPError
     from urllib import urlencode
 
 
@@ -135,7 +137,10 @@ def _make_request(self, opener, request):
         :type request: urllib.Request object
         :return: urllib response
         """
-        return opener.open(request)
+        try:
+            return opener.open(request)
+        except HTTPError as err:
+            handle_error(err)
 
     def _(self, name):
         """Add variable values to the url.

python_http_client/exceptions.py

@@ -0,0 +1,53 @@
+class HTTPError(Exception):
+	''' Base of all other errors'''
+	def __init__(self,error):
+		self.code = error.code
+		self.reason = error.reason
+		#self.headers = error.headers
+
+class BadRequestsError(HTTPError):
+	pass
+
+class UnauthorizedError(HTTPError):
+	pass
+
+class ForbiddenError(HTTPError):
+	pass
+
+class NotFoundError(HTTPError):
+	pass
+
+class MethodNotAllowedError(HTTPError):
+	pass
+
+class PayloadTooLargeError(HTTPError):
+	pass
+
+class UnsupportedMediaTypeError(HTTPError):
+	pass
+
+class TooManyRequestsError(HTTPError):
+	pass
+
+class InternalServerError(HTTPError):
+	pass
+
+class ServiceUnavailableError(HTTPError):
+	pass
+
+err_dict = { 	400 : BadRequestsError,
+				401 : UnauthorizedError,
+				403 : ForbiddenError,
+				404 : NotFoundError,
+				405 : MethodNotAllowedError,
+				413 : PayloadTooLargeError,
+				415 : UnsupportedMediaTypeError,
+				429 : TooManyRequestsError,
+				500 : InternalServerError,
+				503 : ServiceUnavailableError
+}
+
+def handle_error(error):
+	exc = err_dict[error.code](error)
+	exc.__cause__ = None
+	raise exc