merge both winloop & uvloop's error handling ways together

Author: Vizonex

uvloop/_testbase.py

@@ -89,8 +89,10 @@ def loop_exception_handler(self, loop, context):
         self.loop.default_exception_handler(context)
 
     def setUp(self):
-        self.loop = self.new_loop()
+        # WINLOOP comment: next two lines are swapped because otherwise
+        # setting event loop policy has no effect.
         asyncio.set_event_loop_policy(self.new_policy())
+        self.loop = self.new_loop()
         asyncio.set_event_loop(self.loop)
         self._check_unclosed_resources_in_debug = True
 

uvloop/errors.pyx

@@ -1,3 +1,5 @@
+import errno # import here for window's skae...
+
 cdef str __strerr(int errno):
     return strerror(errno).decode()
 
@@ -8,19 +10,20 @@ cdef __convert_python_error(int uverr):
     #      Implementation detail: on Unix error codes are the
     #      negated errno (or -errno), while on Windows they
     #      are defined by libuv to arbitrary negative numbers.
-
+    
     cdef int oserr
+    cdef object err
+    
     if system.PLATFORM_IS_WINDOWS:
-        
-        # Winloop comment: The following approach seems to work for Windows:
-	    # translation from uverr, which is a negative number like -4088 or -4071
-        # defined by libuv (as mentioned above), to error numbers obtained via 
-        # the Python module errno.
+
+        # So Let's try converting them a different way if were using windows.
+        # Winloop has a smarter technique for showing these errors.
         err = getattr(errno, uv.uv_err_name(uverr).decode(), uverr)
         return OSError(err, uv.uv_strerror(uverr).decode())
-
+    
     oserr = -uverr
 
+    
     exc = OSError
 
     if uverr in (uv.UV_EACCES, uv.UV_EPERM):
@@ -118,7 +121,20 @@ cdef convert_error(int uverr):
 
     sock_err = __convert_socket_error(uverr)
     if sock_err:
-        msg = system.gai_strerror(sock_err).decode('utf-8')
-        return socket_gaierror(sock_err, msg)
+        # Winloop comment: Sometimes libraries will throw in some 
+	    # unwanted unicode BS to unravel, to prevent the possibility of this being a threat,
+        # surrogateescape is utilized 
+        # SEE: https://github.com/Vizonex/Winloop/issues/32
+        msg = system.gai_strerror(sock_err).decode('utf-8', "surrogateescape")
+        # Winloop comment: on Windows, cPython has a simpler error
+        # message than uvlib (via winsock probably) in these two cases:
+        # EAI_FAMILY [ErrNo 10047] "An address incompatible with the requested protocol was used. "
+        # EAI_NONAME [ErrNo 10001] "No such host is known. "
+        # We replace these messages with "getaddrinfo failed"
+        if sys.platform == 'win32':
+            if sock_err in (socket_EAI_FAMILY, socket_EAI_NONAME):
+                msg = 'getaddrinfo failed'
+        return socket_gaierror(sock_err, msg) 
 
     return __convert_python_error(uverr)
+