feat: add servers persistence to MCP connection component, add MCP connections settings page (#8388)
* Added mcpinput to the backend * Fixed list selection component to contain descriptions * Added mcp component in the frontend with mock values * Added mcp rendering on Parameter Render Component * Changed input to be more concise and to have dynamic placeholder * Added header search placeholder * Fixed styling to match new input * Removed unused params * Adds AddMcpServerModal's first mock version * Adds Add button on mcp component and list selection component * First pass at mcp api * Add PATCH endpoint * Add DELETE endpoint * fix: Bump version numbers for langflow and langflow-base to 1.4.3 and 0.4.3 respectively * fix: Remove Igor Carvalho from maintainers list in pyproject.toml * fix(agent): reset model list when provider changes Switching the provider in the Agent component sometimes left models from the previous provider visible/selected. We now filter against the new , ensuring only models that belong to the active provider remain. * src/frontend/src/components/core/dropdownComponent/index.tsx – add guard when rebuilding * tests/extended/regression/general-bugs-dropdown-select-not-in-list.spec.ts – expand coverage for “model not in list” edge-cases Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com> * fix: Update Pokédex Agent template (#8373) * Implement adding and getting MCP servers, implemented addMcpServerModal * Added sse and stdio ways of adding a server * Added no actions handling * added new mcp type to constants * Added headers to add mcp server modal * Changed mcp component to allow persistent mcp servers * fix input list component gradient * fix add server modal to patch when initial data is present, and to clean variables when switching tabs * changed message on add mcp server * Added required mutations for mcp page * Added mcp servers page * Changed design of page * Fixed delete problems and added delete confirmation * fixed wrong error parsing * changed padding * Made added server be used on mcp component * refactor: remove references to the langflow store (#8354) Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com> Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com> Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com> fix: apikey lock issue and add option to disable tracking (#8361) * Fixed search on sidebar * fixed infinite use effect * Fixed error handling * Fixed tool mode disappearing * fixed key pair button submitting form * Fixed bugs * Added required * Changed message * Disabled other tabs when modifying * Removed tool dropdown if the mcp server is empty * parsed name * fixed data test id not applying * fixed mcp component * Fixed component not working when only stdio command is present * refactored tests * Updated mcp_component to remove old non default keys * Added data-testids * Modified tests to include settings page functionality * [autofix.ci] apply automated fixes * Refactor out the core part of the mcp * [autofix.ci] apply automated fixes * Added placeholders on frontend components for errors * Fixed bugs with mcp component * updated bug * fix: made empty project appear instead of empty flows list when mcp is enabled (#8336) * try to fix * Fix MCP persistence * Update mcp_component.py * Update mcp.py * [autofix.ci] apply automated fixes * fix: Bump version numbers for langflow and langflow-base to 1.4.3 and 0.4.3 respectively * fix: Remove Igor Carvalho from maintainers list in pyproject.toml * fix(agent): reset model list when provider changes Switching the provider in the Agent component sometimes left models from the previous provider visible/selected. We now filter against the new , ensuring only models that belong to the active provider remain. * src/frontend/src/components/core/dropdownComponent/index.tsx – add guard when rebuilding * tests/extended/regression/general-bugs-dropdown-select-not-in-list.spec.ts – expand coverage for “model not in list” edge-cases Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com> * refactor: remove references to the langflow store (#8354) Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com> Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com> Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com> fix: apikey lock issue and add option to disable tracking (#8361) * fix: made empty project appear instead of empty flows list when mcp is enabled (#8336) * fix mcp client async problems * fixed mcp sse access * [autofix.ci] apply automated fixes * Made values be maintained when refreshing page * Fixed bugs with tool mode and switching from tool mode to not tool mode * Update mcp_component.py * Update test_mcp_component.py * Don't expose file by name as external endpoint * Update files.py * Update files.py * Add checks for id * Refactor tests * Update test_mcp_component.py * Update test_mcp_component.py * Update test_mcp_component.py * updated tests * re-added placeholder on input for tests to not fail * updated session selector in order for tests to work --------- Co-authored-by: Eric Hare <ericrhare@gmail.com> Co-authored-by: Gabriel Luiz Freitas Almeida <gabriel@langflow.org> Co-authored-by: Mike Fortman <michael.fortman@datastax.com> Co-authored-by: Cristian Lousa <cristian.lousa@gmail.com> Co-authored-by: Edwin Jose <edwin.jose@datastax.com> Co-authored-by: Deon Sanchez <69873175+deon-sanchez@users.noreply.github.com> Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com> Co-authored-by: KimberlyFields <46325568+KimberlyFields@users.noreply.github.com> Co-authored-by: Ítalo Johnny <italojohnnydosanjos@gmail.com> Co-authored-by: Mendon Kissling <59585235+mendonk@users.noreply.github.com>
This commit is contained in:
Lucas Oliveira
GitHub
parent
b378eb81d0
commit
60ccdb500f
56 changed files with 2381 additions and 876 deletions
183
src/backend/tests/unit/components/data/test_mcp_component.py
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src/backend/tests/unit/components/data/test_mcp_component.py
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import asyncio
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from unittest.mock import AsyncMock, MagicMock, patch
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import pytest
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from langflow.components.data.mcp_component import MCPSseClient, MCPStdioClient, MCPToolsComponent
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from tests.base import ComponentTestBaseWithoutClient, VersionComponentMapping
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# TODO: This test suite is incomplete and is in need of an update to handle the latest MCP component changes.
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pytestmark = pytest.mark.skip(reason="Skipping entire file")
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class TestMCPToolsComponent(ComponentTestBaseWithoutClient):
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@pytest.fixture
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def component_class(self):
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"""Return the component class to test."""
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return MCPToolsComponent
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@pytest.fixture
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def default_kwargs(self):
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"""Return the default kwargs for the component."""
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return {
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"mode": "Stdio",
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"command": "uvx mcp-server-fetch",
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"sse_url": "http://localhost:7860/api/v1/mcp/sse",
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"tool": "",
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}
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@pytest.fixture
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def file_names_mapping(self) -> list[VersionComponentMapping]:
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"""Return the file names mapping for different versions."""
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return []
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@pytest.fixture
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def mock_tool(self):
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"""Create a mock MCP tool."""
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tool = MagicMock()
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tool.name = "test_tool"
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tool.description = "Test tool description"
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tool.inputSchema = {
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"type": "object",
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"properties": {"test_param": {"type": "string", "description": "Test parameter"}},
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}
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return tool
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@pytest.fixture
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def mock_stdio_client(self, mock_tool):
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"""Create a mock stdio client."""
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stdio_client = AsyncMock()
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stdio_client.connect_to_server = AsyncMock(return_value=[mock_tool])
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stdio_client.session = AsyncMock()
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return stdio_client
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@pytest.fixture
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def mock_sse_client(self, mock_tool):
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"""Create a mock SSE client."""
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sse_client = AsyncMock()
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sse_client.connect_to_server = AsyncMock(return_value=[mock_tool])
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sse_client.session = AsyncMock()
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return sse_client
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class TestMCPStdioClient:
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@pytest.fixture
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def stdio_client(self):
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return MCPStdioClient()
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async def test_connect_to_server(self, stdio_client):
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"""Test connecting to server via Stdio."""
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# Create mock for stdio transport
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mock_stdio = AsyncMock()
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mock_write = AsyncMock()
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mock_stdio_transport = (mock_stdio, mock_write)
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mock_stdio_cm = AsyncMock()
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mock_stdio_cm.__aenter__.return_value = mock_stdio_transport
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# Mock the stdio_client function to return our mock context manager
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with patch("mcp.client.stdio.stdio_client", return_value=mock_stdio_cm):
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# Mock ClientSession
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mock_session = AsyncMock()
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mock_session.initialize = AsyncMock()
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mock_session.list_tools.return_value.tools = [MagicMock()]
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# Mock the AsyncExitStack
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mock_exit_stack = AsyncMock()
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mock_exit_stack.enter_async_context = AsyncMock()
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mock_exit_stack.enter_async_context.side_effect = [
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mock_stdio_transport, # For stdio_client
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mock_session, # For ClientSession
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]
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stdio_client.exit_stack = mock_exit_stack
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tools = await stdio_client.connect_to_server("test_command")
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assert len(tools) == 1
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assert stdio_client.session is not None
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# Verify the exit stack was used correctly
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assert mock_exit_stack.enter_async_context.call_count == 2
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# Verify the stdio transport was properly set
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assert stdio_client.stdio == mock_stdio
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assert stdio_client.write == mock_write
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class TestMCPSseClient:
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@pytest.fixture
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def sse_client(self):
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return MCPSseClient()
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async def test_pre_check_redirect(self, sse_client):
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"""Test pre-checking URL for redirects."""
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test_url = "http://test.url"
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redirect_url = "http://redirect.url"
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with patch("httpx.AsyncClient") as mock_client:
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mock_response = MagicMock()
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mock_response.status_code = 307
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mock_response.headers.get.return_value = redirect_url
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mock_client.return_value.__aenter__.return_value.request.return_value = mock_response
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result = await sse_client.pre_check_redirect(test_url)
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assert result == redirect_url
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async def test_connect_to_server(self, sse_client):
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"""Test connecting to server via SSE."""
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# Mock the pre_check_redirect first
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with (
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patch.object(sse_client, "pre_check_redirect", return_value="http://test.url"),
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patch.object(sse_client, "validate_url", return_value=(True, "")),
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):
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# Create mock for sse_client context manager
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mock_sse = AsyncMock()
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mock_write = AsyncMock()
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mock_sse_transport = (mock_sse, mock_write)
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mock_sse_cm = AsyncMock()
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mock_sse_cm.__aenter__.return_value = mock_sse_transport
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# Mock the sse_client function to return our mock context manager
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with patch("mcp.client.sse.sse_client", return_value=mock_sse_cm):
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# Mock ClientSession
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mock_session = AsyncMock()
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mock_session.initialize = AsyncMock()
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mock_session.list_tools.return_value.tools = [MagicMock()]
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# Mock the AsyncExitStack
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mock_exit_stack = AsyncMock()
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mock_exit_stack.enter_async_context = AsyncMock()
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mock_exit_stack.enter_async_context.side_effect = [
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mock_sse_transport, # For sse_client
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mock_session, # For ClientSession
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]
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sse_client.exit_stack = mock_exit_stack
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tools = await sse_client.connect_to_server("http://test.url", {})
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assert len(tools) == 1
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assert sse_client.session is not None
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# Verify the exit stack was used correctly
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assert mock_exit_stack.enter_async_context.call_count == 2
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# Verify the SSE transport was properly set
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assert sse_client.sse == mock_sse
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assert sse_client.write == mock_write
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async def test_connect_timeout(self, sse_client):
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"""Test connection timeout handling."""
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# Set max_retries to 1 to avoid multiple retry attempts
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sse_client.max_retries = 1
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with (
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patch.object(sse_client, "pre_check_redirect", return_value="http://test.url"),
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patch.object(sse_client, "validate_url", return_value=(True, "")), # Mock URL validation
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patch.object(sse_client, "_connect_with_timeout") as mock_connect,
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):
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mock_connect.side_effect = asyncio.TimeoutError()
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# Expect ConnectionError instead of TimeoutError
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with pytest.raises(
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ConnectionError,
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match=(
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"Failed to connect after 1 attempts. "
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"Last error: Connection to http://test.url timed out after 1 seconds"
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),
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):
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await sse_client.connect_to_server("http://test.url", {}, timeout_seconds=1)
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