Bagatur/lakefs loader2 (#12524)

Co-authored-by: Jonathan Rosenberg <96974219+Jonathan-Rosenberg@users.noreply.github.com>
2025-08-01 09:04:03 +00:00 · 2023-10-30 16:30:27 -07:00 · 2023-10-30 16:30:27 -07:00 · 9bedda50f2
commit 9bedda50f2
parent 3243dcc83e
8 changed files with 503 additions and 16 deletions
--- a/docs/docs/integrations/document_loaders/lakefs.ipynb
+++ b/docs/docs/integrations/document_loaders/lakefs.ipynb
@ -0,0 +1,103 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# lakeFS\n",
+    "\n",
+    ">[lakeFS](https://docs.lakefs.io/) provides scalable version control over the data lake, and uses Git-like semantics to create and access those versions.\n",
+    "\n",
+    "This notebooks covers how to load document objects from a `lakeFS` path (whether it's an object or a prefix).\n"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## Initializing the lakeFS loader\n",
+    "\n",
+    "Replace `ENDPOINT`, `LAKEFS_ACCESS_KEY`, and `LAKEFS_SECRET_KEY` values with your own."
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain.document_loaders import LakeFSLoader"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "ENDPOINT = \"\"\n",
+    "LAKEFS_ACCESS_KEY = \"\"\n",
+    "LAKEFS_SECRET_KEY = \"\"\n",
+    "\n",
+    "lakefs_loader = LakeFSLoader(\n",
+    "    lakefs_access_key=LAKEFS_ACCESS_KEY,\n",
+    "    lakefs_secret_key=LAKEFS_SECRET_KEY,\n",
+    "    lakefs_endpoint=ENDPOINT,\n",
+    ")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "source": [
+    "## Specifying a path\n",
+    "You can specify a prefix or a complete object path to control which files to load.\n",
+    "\n",
+    "Specify the repository, reference (branch, commit id, or tag), and path in the corresponding `REPO`, `REF`, and `PATH` to load the documents from:"
+   ],
+   "metadata": {
+    "collapsed": false
+   }
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "REPO = \"\"\n",
+    "REF = \"\"\n",
+    "PATH = \"\"\n",
+    "\n",
+    "lakefs_loader.set_repo(REPO)\n",
+    "lakefs_loader.set_ref(REF)\n",
+    "lakefs_loader.set_path(PATH)\n",
+    "\n",
+    "docs = lakefs_loader.load()\n",
+    "docs"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3 (ipykernel)",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.9.1"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
--- a/libs/langchain/langchain/document_loaders/init.py
+++ b/libs/langchain/langchain/document_loaders/init.py
@ -101,6 +101,7 @@ from langchain.document_loaders.imsdb import IMSDbLoader
 from langchain.document_loaders.iugu import IuguLoader
 from langchain.document_loaders.joplin import JoplinLoader
 from langchain.document_loaders.json_loader import JSONLoader
+from langchain.document_loaders.lakefs import LakeFSLoader
 from langchain.document_loaders.larksuite import LarkSuiteDocLoader
 from langchain.document_loaders.markdown import UnstructuredMarkdownLoader
 from langchain.document_loaders.mastodon import MastodonTootsLoader
@ -280,6 +281,7 @@ __all__ = [
    "JSONLoader",
    "JoplinLoader",
    "LarkSuiteDocLoader",
+    "LakeFSLoader",
    "MHTMLLoader",
    "MWDumpLoader",
    "MastodonTootsLoader",
--- a/libs/langchain/langchain/document_loaders/lakefs.py
+++ b/libs/langchain/langchain/document_loaders/lakefs.py
@ -0,0 +1,179 @@
+import os
+import tempfile
+import urllib.parse
+from typing import Any, List, Optional
+from urllib.parse import urljoin
+
+import requests
+from requests.auth import HTTPBasicAuth
+
+from langchain.document_loaders.base import BaseLoader
+from langchain.document_loaders.unstructured import UnstructuredBaseLoader
+from langchain.schema import Document
+
+
+class LakeFSClient:
+    def __init__(
+        self,
+        lakefs_access_key: str,
+        lakefs_secret_key: str,
+        lakefs_endpoint: str,
+    ):
+        self.__endpoint = "/".join([lakefs_endpoint, "api", "v1/"])
+        self.__auth = HTTPBasicAuth(lakefs_access_key, lakefs_secret_key)
+        try:
+            health_check = requests.get(
+                urljoin(self.__endpoint, "healthcheck"), auth=self.__auth
+            )
+            health_check.raise_for_status()
+        except Exception:
+            raise ValueError(
+                "lakeFS server isn't accessible. Make sure lakeFS is running."
+            )
+
+    def ls_objects(
+        self, repo: str, ref: str, path: str, presign: Optional[bool]
+    ) -> List:
+        qp = {"prefix": path, "presign": presign}
+        eqp = urllib.parse.urlencode(qp)
+        objects_ls_endpoint = urljoin(
+            self.__endpoint, f"repositories/{repo}/refs/{ref}/objects/ls?{eqp}"
+        )
+        olsr = requests.get(objects_ls_endpoint, auth=self.__auth)
+        olsr.raise_for_status()
+        olsr_json = olsr.json()
+        return list(
+            map(
+                lambda res: (res["path"], res["physical_address"]), olsr_json["results"]
+            )
+        )
+
+    def is_presign_supported(self) -> bool:
+        config_endpoint = self.__endpoint + "config"
+        response = requests.get(config_endpoint, auth=self.__auth)
+        response.raise_for_status()
+        config = response.json()
+        return config["storage_config"]["pre_sign_support"]
+
+
+class LakeFSLoader(BaseLoader):
+    """Load from `lakeFS`."""
+
+    repo: str
+    ref: str
+    path: str
+
+    def __init__(
+        self,
+        lakefs_access_key: str,
+        lakefs_secret_key: str,
+        lakefs_endpoint: str,
+        repo: Optional[str] = None,
+        ref: Optional[str] = "main",
+        path: Optional[str] = "",
+    ):
+        """
+
+        :param lakefs_access_key: [required] lakeFS server's access key
+        :param lakefs_secret_key: [required] lakeFS server's secret key
+        :param lakefs_endpoint: [required] lakeFS server's endpoint address,
+               ex: https://example.my-lakefs.com
+        :param repo: [optional, default = ''] target repository
+        :param ref: [optional, default = 'main'] target ref (branch name,
+               tag, or commit ID)
+        :param path: [optional, default = ''] target path
+        """
+
+        self.__lakefs_client = LakeFSClient(
+            lakefs_access_key, lakefs_secret_key, lakefs_endpoint
+        )
+        self.repo = "" if repo is None or repo == "" else str(repo)
+        self.ref = "main" if ref is None or ref == "" else str(ref)
+        self.path = "" if path is None else str(path)
+
+    def set_path(self, path: str) -> None:
+        self.path = path
+
+    def set_ref(self, ref: str) -> None:
+        self.ref = ref
+
+    def set_repo(self, repo: str) -> None:
+        self.repo = repo
+
+    def load(self) -> List[Document]:
+        self.__validate_instance()
+        presigned = self.__lakefs_client.is_presign_supported()
+        docs: List[Document] = []
+        objs = self.__lakefs_client.ls_objects(
+            repo=self.repo, ref=self.ref, path=self.path, presign=presigned
+        )
+        for obj in objs:
+            lakefs_unstructured_loader = UnstructuredLakeFSLoader(
+                obj[1], self.repo, self.ref, obj[0], presigned
+            )
+            docs.extend(lakefs_unstructured_loader.load())
+        return docs
+
+    def __validate_instance(self) -> None:
+        if self.repo is None or self.repo == "":
+            raise ValueError(
+                "no repository was provided. use `set_repo` to specify a repository"
+            )
+        if self.ref is None or self.ref == "":
+            raise ValueError("no ref was provided. use `set_ref` to specify a ref")
+        if self.path is None:
+            raise ValueError("no path was provided. use `set_path` to specify a path")
+
+
+class UnstructuredLakeFSLoader(UnstructuredBaseLoader):
+    def __init__(
+        self,
+        url: str,
+        repo: str,
+        ref: str = "main",
+        path: str = "",
+        presign: bool = True,
+        **unstructured_kwargs: Any,
+    ):
+        """
+
+        Args:
+
+        :param lakefs_access_key:
+        :param lakefs_secret_key:
+        :param lakefs_endpoint:
+        :param repo:
+        :param ref:
+        """
+
+        super().__init__(**unstructured_kwargs)
+        self.url = url
+        self.repo = repo
+        self.ref = ref
+        self.path = path
+        self.presign = presign
+
+    def _get_metadata(self) -> dict:
+        return {"repo": self.repo, "ref": self.ref, "path": self.path}
+
+    def _get_elements(self) -> List:
+        from unstructured.partition.auto import partition
+
+        local_prefix = "local://"
+
+        if self.presign:
+            with tempfile.TemporaryDirectory() as temp_dir:
+                file_path = f"{temp_dir}/{self.path.split('/')[-1]}"
+                os.makedirs(os.path.dirname(file_path), exist_ok=True)
+                response = requests.get(self.url)
+                response.raise_for_status()
+                with open(file_path, mode="wb") as file:
+                    file.write(response.content)
+                return partition(filename=file_path)
+        elif not self.url.startswith(local_prefix):
+            raise ValueError(
+                "Non pre-signed URLs are supported only with 'local' blockstore"
+            )
+        else:
+            local_path = self.url[len(local_prefix) :]
+            return partition(filename=local_path)
--- a/libs/langchain/poetry.lock
+++ b/libs/langchain/poetry.lock
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+    {file = "PyYAML-6.0.1-cp39-cp39-musllinux_1_1_x86_64.whl", hash = "sha256:04ac92ad1925b2cff1db0cfebffb6ffc43457495c9b3c39d3fcae417d7125dc5"},
    {file = "PyYAML-6.0.1-cp39-cp39-win32.whl", hash = "sha256:faca3bdcf85b2fc05d06ff3fbc1f83e1391b3e724afa3feba7d13eeab355484c"},
    {file = "PyYAML-6.0.1-cp39-cp39-win_amd64.whl", hash = "sha256:510c9deebc5c0225e8c96813043e62b680ba2f9c50a08d3724c7f28a747d1486"},
    {file = "PyYAML-6.0.1.tar.gz", hash = "sha256:bfdf460b1736c775f2ba9f6a92bca30bc2095067b8a9d77876d1fad6cc3b4a43"},
@ -8274,6 +8294,25 @@ files = [
 requests = ">=1.0.0"
 six = "*"

+[[package]]
+name = "requests-mock"
+version = "1.11.0"
+description = "Mock out responses from the requests package"
+optional = false
+python-versions = "*"
+files = [
+    {file = "requests-mock-1.11.0.tar.gz", hash = "sha256:ef10b572b489a5f28e09b708697208c4a3b2b89ef80a9f01584340ea357ec3c4"},
+    {file = "requests_mock-1.11.0-py2.py3-none-any.whl", hash = "sha256:f7fae383f228633f6bececebdab236c478ace2284d6292c6e7e2867b9ab74d15"},
+]
+
+[package.dependencies]
+requests = ">=2.3,<3"
+six = "*"
+
+[package.extras]
+fixture = ["fixtures"]
+test = ["fixtures", "mock", "purl", "pytest", "requests-futures", "sphinx", "testtools"]
+
 [[package]]
 name = "requests-oauthlib"
 version = "1.3.1"
@ -11047,4 +11086,4 @@ text-helpers = ["chardet"]
 [metadata]
 lock-version = "2.0"
 python-versions = ">=3.8.1,<4.0"
-content-hash = "1da427450c9a9c6b20082b98e6a1371d9cc0fb48da2e45831070587c27449b40"
+content-hash = "9345cd37346e9f369702f51b7e10dde8da91d5f7b659c8c204e5b46c360cd028"
--- a/libs/langchain/pyproject.toml
+++ b/libs/langchain/pyproject.toml
@ -159,6 +159,8 @@ pandas = "^2.0.0"
 pytest-mock  = "^3.10.0"
 pytest-socket = "^0.6.0"
 syrupy = "^4.0.2"
+requests-mock = "^1.11.0"
+

 [tool.poetry.group.codespell.dependencies]
 codespell = "^2.2.0"
--- a/libs/langchain/tests/integration_tests/document_loaders/test_lakefs.py
+++ b/libs/langchain/tests/integration_tests/document_loaders/test_lakefs.py
@ -0,0 +1,71 @@
+import unittest
+from typing import Any
+from unittest.mock import patch
+
+import pytest
+import requests_mock
+from requests_mock.mocker import Mocker
+
+from langchain.document_loaders.lakefs import LakeFSLoader
+
+
+@pytest.fixture
+def mock_lakefs_client() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "https://physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = True
+        yield mock_lakefs_client.return_value
+
+
+@pytest.fixture
+def mock_lakefs_client_no_presign_not_local() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "https://physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = False
+        yield mock_lakefs_client.return_value
+
+
+@pytest.fixture
+def mock_unstructured_local() -> Any:
+    with patch(
+        "langchain.document_loaders.lakefs.UnstructuredLakeFSLoader"
+    ) as mock_unstructured_lakefs:
+        mock_unstructured_lakefs.return_value.load.return_value = [
+            ("text content", "pdf content")
+        ]
+        yield mock_unstructured_lakefs.return_value
+
+
+@pytest.fixture
+def mock_lakefs_client_no_presign_local() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "local:///physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = False
+        yield mock_lakefs_client.return_value
+
+
+class TestLakeFSLoader(unittest.TestCase):
+    lakefs_access_key = "lakefs_access_key"
+    lakefs_secret_key = "lakefs_secret_key"
+    endpoint = "endpoint"
+    repo = "repo"
+    ref = "ref"
+    path = "path"
+
+    @requests_mock.Mocker()
+    @pytest.mark.usefixtures("mock_lakefs_client")
+    def test_presigned_loading(self, mocker: Mocker) -> None:
+        mocker.register_uri("GET", requests_mock.ANY, text="data")
+        loader = LakeFSLoader(
+            self.lakefs_access_key, self.lakefs_secret_key, self.endpoint
+        )
+        loader.set_repo(self.repo)
+        loader.set_ref(self.ref)
+        loader.set_path(self.path)
+        loader.load()
--- a/libs/langchain/tests/unit_tests/document_loaders/test_lakefs.py
+++ b/libs/langchain/tests/unit_tests/document_loaders/test_lakefs.py
@ -0,0 +1,88 @@
+import unittest
+from typing import Any
+from unittest.mock import patch
+
+import pytest
+import requests_mock
+from requests_mock.mocker import Mocker
+
+from langchain.document_loaders.lakefs import LakeFSLoader
+
+
+@pytest.fixture
+def mock_lakefs_client() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "https://physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = True
+        yield mock_lakefs_client.return_value
+
+
+@pytest.fixture
+def mock_lakefs_client_no_presign_not_local() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "https://physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = False
+        yield mock_lakefs_client.return_value
+
+
+@pytest.fixture
+def mock_unstructured_local() -> Any:
+    with patch(
+        "langchain.document_loaders.lakefs.UnstructuredLakeFSLoader"
+    ) as mock_unstructured_lakefs:
+        mock_unstructured_lakefs.return_value.load.return_value = [
+            ("text content", "pdf content")
+        ]
+        yield mock_unstructured_lakefs.return_value
+
+
+@pytest.fixture
+def mock_lakefs_client_no_presign_local() -> Any:
+    with patch("langchain.document_loaders.lakefs.LakeFSClient") as mock_lakefs_client:
+        mock_lakefs_client.return_value.ls_objects.return_value = [
+            ("path_bla.txt", "local:///physical_address_bla")
+        ]
+        mock_lakefs_client.return_value.is_presign_supported.return_value = False
+        yield mock_lakefs_client.return_value
+
+
+class TestLakeFSLoader(unittest.TestCase):
+    lakefs_access_key = "lakefs_access_key"
+    lakefs_secret_key = "lakefs_secret_key"
+    endpoint = "endpoint"
+    repo = "repo"
+    ref = "ref"
+    path = "path"
+
+    @requests_mock.Mocker()
+    @pytest.mark.usefixtures("mock_lakefs_client_no_presign_not_local")
+    def test_non_presigned_loading_fail(self, mocker: Mocker) -> None:
+        mocker.register_uri(requests_mock.ANY, requests_mock.ANY, status_code=200)
+        loader = LakeFSLoader(
+            self.lakefs_access_key, self.lakefs_secret_key, self.endpoint
+        )
+        loader.set_repo(self.repo)
+        loader.set_ref(self.ref)
+        loader.set_path(self.path)
+        with pytest.raises(ValueError):
+            loader.load()
+
+    @requests_mock.Mocker()
+    @pytest.mark.usefixtures(
+        "mock_lakefs_client_no_presign_local", "mock_unstructured_local"
+    )
+    def test_non_presigned_loading(self, mocker: Mocker) -> None:
+        mocker.register_uri(requests_mock.ANY, requests_mock.ANY, status_code=200)
+        loader = LakeFSLoader(
+            lakefs_access_key="lakefs_access_key",
+            lakefs_secret_key="lakefs_secret_key",
+            lakefs_endpoint=self.endpoint,
+        )
+        loader.set_repo(self.repo)
+        loader.set_ref(self.ref)
+        loader.set_path(self.path)
+        loader.load()
--- a/libs/langchain/tests/unit_tests/test_dependencies.py
+++ b/libs/langchain/tests/unit_tests/test_dependencies.py
@ -69,21 +69,24 @@ def test_test_group_dependencies(poetry_conf: Mapping[str, Any]) -> None:

    test_group_deps = sorted(poetry_conf["group"]["test"]["dependencies"])

-    assert test_group_deps == [
-        "duckdb-engine",
-        "freezegun",
-        "lark",
-        "pandas",
-        "pytest",
-        "pytest-asyncio",
-        "pytest-cov",
-        "pytest-dotenv",
-        "pytest-mock",
-        "pytest-socket",
-        "pytest-watcher",
-        "responses",
-        "syrupy",
-    ]
+    assert test_group_deps == sorted(
+        [
+            "duckdb-engine",
+            "freezegun",
+            "lark",
+            "pandas",
+            "pytest",
+            "pytest-asyncio",
+            "pytest-cov",
+            "pytest-dotenv",
+            "pytest-mock",
+            "pytest-socket",
+            "pytest-watcher",
+            "responses",
+            "syrupy",
+            "requests-mock",
+        ]
+    )


 def test_imports() -> None: