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Python: raise ValueError for malformed data URIs #6916

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Python: raise ValueError for malformed data URIs #6916

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67f9aa9
Python: raise ValueError for malformed data URIs
VectorPeak Jul 5, 2026
630243a
Address malformed data URI review feedback
VectorPeak Jul 5, 2026
4120f24
Merge branch 'main' into codex-core-malformed-data-uri-valueerror
VectorPeak Jul 7, 2026
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2 changes: 2 additions & 0 deletions python/packages/core/agent_framework/_types.py
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,8 @@ def detect_media_type_from_base64(
if data is not None:
raise ValueError("Provide exactly one of data_bytes, data_str, or data_uri.")
# Remove data URI prefix if present
if ";base64," not in data_uri:
raise ValueError("Invalid data URI format.")
data_str = data_uri.split(";base64,", 1)[1]
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if data_str is not None:
if data is not None:
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14 changes: 14 additions & 0 deletions python/packages/core/tests/core/test_types.py
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Expand Up @@ -208,6 +208,20 @@ def test_data_content_detect_image_format_from_base64():
detect_media_type_from_base64(data_str="data", data_uri="data:application/octet-stream;base64,AAA")


@pytest.mark.parametrize(
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"data_uri",
[
"data:text/plain,hello",
"data:image/png;base64",
"not-a-data-uri",
],
)
def test_detect_media_type_from_base64_rejects_malformed_data_uri(data_uri: str):
"""Test malformed data URI inputs raise the documented ValueError."""
with pytest.raises(ValueError, match="Invalid data URI format."):
detect_media_type_from_base64(data_uri=data_uri)


def test_data_content_create_data_uri_from_base64():
"""Test the create_data_uri_from_base64 class method."""
# Test with PNG data
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