Use brotli with CPython, brotlicffi elsewhere

Author: ahesford

httpbin/filters.py

@@ -10,7 +10,10 @@
 import gzip as gzip2
 import zlib
 
-import brotlicffi as _brotli
+try:
+    import brotlicffi as _brotli
+except ImportError:
+    import brotli as _brotli
 
 from six import BytesIO
 from decimal import Decimal

pyproject.toml

@@ -32,7 +32,8 @@ classifiers = [
 ]
 dependencies = [
     "flask >= 2.2.4",
-    "brotlicffi",
+    "brotli; platform_python_implementation == 'CPython'",
+    "brotlicffi; platform_python_implementation != 'CPython'",
     "decorator",
     "flasgger",
     'greenlet < 3.0; python_version<"3.12"',