wehub-resource-sync
49b9bb6724
Deploy Docs / deploy-docs (push) Failing after 1s
Conformance Tests / client-conformance (push) Failing after 3s
Conformance Tests / server-conformance (push) Failing after 1s
GitHub Actions Security Analysis / zizmor (push) Failing after 1s
CI / checks (push) Failing after 59m20s
CI / all-green (push) Waiting to run
53 lines
1.8 KiB
Python
53 lines
1.8 KiB
Python
"""Test for base64 encoding issue in MCP server.
|
|
|
|
This test verifies that binary resource data is encoded with standard base64
|
|
(not urlsafe_b64encode), so BlobResourceContents validation succeeds.
|
|
"""
|
|
|
|
import base64
|
|
|
|
import pytest
|
|
from mcp_types import BlobResourceContents
|
|
|
|
from mcp import Client
|
|
from mcp.server.mcpserver import MCPServer
|
|
|
|
pytestmark = pytest.mark.anyio
|
|
|
|
|
|
async def test_server_base64_encoding():
|
|
"""Tests that binary resource data round-trips correctly through base64 encoding.
|
|
|
|
The test uses binary data that produces different results with urlsafe vs standard
|
|
base64, ensuring the server uses standard encoding.
|
|
"""
|
|
mcp = MCPServer("test")
|
|
|
|
# Create binary data that will definitely result in + and / characters
|
|
# when encoded with standard base64
|
|
binary_data = bytes(list(range(255)) * 4)
|
|
|
|
# Sanity check: our test data produces different encodings
|
|
urlsafe_b64 = base64.urlsafe_b64encode(binary_data).decode()
|
|
standard_b64 = base64.b64encode(binary_data).decode()
|
|
assert urlsafe_b64 != standard_b64, "Test data doesn't demonstrate encoding difference"
|
|
|
|
@mcp.resource("test://binary", mime_type="application/octet-stream")
|
|
def get_binary() -> bytes:
|
|
"""Return binary test data."""
|
|
return binary_data
|
|
|
|
async with Client(mcp) as client:
|
|
result = await client.read_resource("test://binary")
|
|
assert len(result.contents) == 1
|
|
|
|
blob_content = result.contents[0]
|
|
assert isinstance(blob_content, BlobResourceContents)
|
|
|
|
# Verify standard base64 was used (not urlsafe)
|
|
assert blob_content.blob == standard_b64
|
|
|
|
# Verify we can decode the data back correctly
|
|
decoded = base64.b64decode(blob_content.blob)
|
|
assert decoded == binary_data
|