Fixed #30137 -- Replaced OSError aliases with the canonical OSError.

Used more specific errors (e.g. FileExistsError) as appropriate.

2 files changed, 7 insertions, 7 deletions

diff --git a/django/http/request.py b/django/http/request.py
index f1c232d89a..51d0a8dfc3 100644
--- a/django/http/request.py
+++ b/django/http/request.py
@@ -22,7 +22,7 @@ RAISE_ERROR = object()
 host_validation_re = re.compile(r"^([a-z0-9.-]+|\[[a-f0-9]*:[a-f0-9\.:]+\])(:\d+)?$")
 
 
-class UnreadablePostError(IOError):
+class UnreadablePostError(OSError):
     pass
 
 
@@ -284,7 +284,7 @@ class HttpRequest:
 
             try:
                 self._body = self.read()
-            except IOError as e:
+            except OSError as e:
                 raise UnreadablePostError(*e.args) from e
             self._stream = BytesIO(self._body)
         return self._body
@@ -339,14 +339,14 @@ class HttpRequest:
         self._read_started = True
         try:
             return self._stream.read(*args, **kwargs)
-        except IOError as e:
+        except OSError as e:
             raise UnreadablePostError(*e.args) from e
 
     def readline(self, *args, **kwargs):
         self._read_started = True
         try:
             return self._stream.readline(*args, **kwargs)
-        except IOError as e:
+        except OSError as e:
             raise UnreadablePostError(*e.args) from e
 
     def __iter__(self):
diff --git a/django/http/response.py b/django/http/response.py
index 5a640a51cf..6a84e193ba 100644
--- a/django/http/response.py
+++ b/django/http/response.py
@@ -251,13 +251,13 @@ class HttpResponseBase:
         signals.request_finished.send(sender=self._handler_class)
 
     def write(self, content):
-        raise IOError("This %s instance is not writable" % self.__class__.__name__)
+        raise OSError('This %s instance is not writable' % self.__class__.__name__)
 
     def flush(self):
         pass
 
     def tell(self):
-        raise IOError("This %s instance cannot tell its position" % self.__class__.__name__)
+        raise OSError('This %s instance cannot tell its position' % self.__class__.__name__)
 
     # These methods partially implement a stream-like object interface.
     # See https://docs.python.org/library/io.html#io.IOBase
@@ -272,7 +272,7 @@ class HttpResponseBase:
         return False
 
     def writelines(self, lines):
-        raise IOError("This %s instance is not writable" % self.__class__.__name__)
+        raise OSError('This %s instance is not writable' % self.__class__.__name__)
 
 
 class HttpResponse(HttpResponseBase):