Add ruff and MultipartState(IntEnum) (#96)

* Several improvements

* Add ruff to the pipeline

* Use single quotes

* Use double quotes

* nitpicks

* Add ruff to dev optional

Author: Kludex

.github/workflows/test.yaml renamed to .github/workflows/main.yaml

@@ -26,6 +26,10 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install .[dev]
+      - name: Lint
+        if: matrix.python-version == '3.8'
+        run: |
+          ruff multipart tests
       - name: Test with pytest
         run: |
           inv test

.github/workflows/publish.yaml

@@ -18,12 +18,10 @@ permissions:
 
 jobs:
   deploy:
-
     runs-on: ubuntu-latest
 
     steps:
     - uses: actions/checkout@v4
-
     - name: Set up Python 3.10
       uses: actions/setup-python@v5
       with:

multipart/__init__.py

@@ -4,12 +4,13 @@
 __copyright__ = "Copyright (c) 2012-2013, Andrew Dunham"
 __version__ = "0.0.8"
 
+from .multipart import FormParser, MultipartParser, OctetStreamParser, QuerystringParser, create_form_parser, parse_form
 
-from .multipart import (
-    FormParser,
-    MultipartParser,
-    OctetStreamParser,
-    QuerystringParser,
-    create_form_parser,
-    parse_form,
+__all__ = (
+    "FormParser",
+    "MultipartParser",
+    "OctetStreamParser",
+    "QuerystringParser",
+    "create_form_parser",
+    "parse_form",
 )

multipart/decoders.py

@@ -59,8 +59,7 @@ def write(self, data):
             try:
                 decoded = base64.b64decode(val)
             except binascii.Error:
-                raise DecodeError('There was an error raised while decoding '
-                                  'base64-encoded data.')
+                raise DecodeError("There was an error raised while decoding base64-encoded data.")
 
             self.underlying.write(decoded)
 
@@ -69,7 +68,7 @@ def write(self, data):
         if remaining_len > 0:
             self.cache = data[-remaining_len:]
         else:
-            self.cache = b''
+            self.cache = b""
 
         # Return the length of the data to indicate no error.
         return len(data)
@@ -78,7 +77,7 @@ def close(self):
         """Close this decoder.  If the underlying object has a `close()`
         method, this function will call it.
         """
-        if hasattr(self.underlying, 'close'):
+        if hasattr(self.underlying, "close"):
             self.underlying.close()
 
     def finalize(self):
@@ -91,11 +90,11 @@ def finalize(self):
         call it.
         """
         if len(self.cache) > 0:
-            raise DecodeError('There are %d bytes remaining in the '
-                              'Base64Decoder cache when finalize() is called'
-                              % len(self.cache))
+            raise DecodeError(
+                "There are %d bytes remaining in the Base64Decoder cache when finalize() is called" % len(self.cache)
+            )
 
-        if hasattr(self.underlying, 'finalize'):
+        if hasattr(self.underlying, "finalize"):
             self.underlying.finalize()
 
     def __repr__(self):
@@ -111,8 +110,9 @@ class QuotedPrintableDecoder:
 
     :param underlying: the underlying object to pass writes to
     """
+
     def __init__(self, underlying):
-        self.cache = b''
+        self.cache = b""
         self.underlying = underlying
 
     def write(self, data):
@@ -128,11 +128,11 @@ def write(self, data):
         # If the last 2 characters have an '=' sign in it, then we won't be
         # able to decode the encoded value and we'll need to save it for the
         # next decoding step.
-        if data[-2:].find(b'=') != -1:
+        if data[-2:].find(b"=") != -1:
             enc, rest = data[:-2], data[-2:]
         else:
             enc = data
-            rest = b''
+            rest = b""
 
         # Encode and write, if we have data.
         if len(enc) > 0:
@@ -146,7 +146,7 @@ def close(self):
         """Close this decoder.  If the underlying object has a `close()`
         method, this function will call it.
         """
-        if hasattr(self.underlying, 'close'):
+        if hasattr(self.underlying, "close"):
             self.underlying.close()
 
     def finalize(self):
@@ -161,10 +161,10 @@ def finalize(self):
         # If we have a cache, write and then remove it.
         if len(self.cache) > 0:
             self.underlying.write(binascii.a2b_qp(self.cache))
-            self.cache = b''
+            self.cache = b""
 
         # Finalize our underlying stream.
-        if hasattr(self.underlying, 'finalize'):
+        if hasattr(self.underlying, "finalize"):
             self.underlying.finalize()
 
     def __repr__(self):

multipart/exceptions.py

@@ -1,6 +1,5 @@
 class FormParserError(ValueError):
     """Base error class for our form parser."""
-    pass
 
 
 class ParseError(FormParserError):
@@ -17,30 +16,19 @@ class MultipartParseError(ParseError):
     """This is a specific error that is raised when the MultipartParser detects
     an error while parsing.
     """
-    pass
 
 
 class QuerystringParseError(ParseError):
     """This is a specific error that is raised when the QuerystringParser
     detects an error while parsing.
     """
-    pass
 
 
 class DecodeError(ParseError):
     """This exception is raised when there is a decoding error - for example
     with the Base64Decoder or QuotedPrintableDecoder.
     """
-    pass
-
-
-# On Python 3.3, IOError is the same as OSError, so we don't want to inherit
-# from both of them.  We handle this case below.
-if IOError is not OSError:      # pragma: no cover
-    class FileError(FormParserError, IOError, OSError):
-        """Exception class for problems with the File class."""
-        pass
-else:                           # pragma: no cover
-    class FileError(FormParserError, OSError):
-        """Exception class for problems with the File class."""
-        pass
+
+
+class FileError(FormParserError, OSError):
+    """Exception class for problems with the File class."""