1 files changed, 44 insertions, 0 deletions
diff --git a/testing/web-platform/tests/tools/third_party/websockets/fuzzing/fuzz_http11_response_parser.py b/testing/web-platform/tests/tools/third_party/websockets/fuzzing/fuzz_http11_response_parser.py
new file mode 100644
index 0000000000..6906720a49
--- /dev/null
+++ b/testing/web-platform/tests/tools/third_party/websockets/fuzzing/fuzz_http11_response_parser.py
@@ -0,0 +1,44 @@
+import sys
+
+import atheris
+
+
+with atheris.instrument_imports():
+    from websockets.exceptions import SecurityError
+    from websockets.http11 import Response
+    from websockets.streams import StreamReader
+
+
+def test_one_input(data):
+    reader = StreamReader()
+    reader.feed_data(data)
+    reader.feed_eof()
+
+    parser = Response.parse(
+        reader.read_line,
+        reader.read_exact,
+        reader.read_to_eof,
+    )
+    try:
+        next(parser)
+    except StopIteration as exc:
+        assert isinstance(exc.value, Response)
+        return  # input accepted
+    except (
+        EOFError,  # connection is closed without a full HTTP response
+        SecurityError,  # response exceeds a security limit
+        LookupError,  # response isn't well formatted
+        ValueError,  # response isn't well formatted
+    ):
+        return  # input rejected with a documented exception
+
+    raise RuntimeError("parsing didn't complete")
+
+
+def main():
+    atheris.Setup(sys.argv, test_one_input)
+    atheris.Fuzz()
+
+
+if __name__ == "__main__":
+    main()