PoC for file upload

airbyte_cdk/models/__init__.py

@@ -19,6 +19,7 @@
     AirbyteMessage,
     AirbyteProtocol,
     AirbyteRecordMessage,
+    AirbyteRecordMessageFileReference,
     AirbyteStateBlob,
     AirbyteStateMessage,
     AirbyteStateStats,

airbyte_cdk/sources/concurrent_source/concurrent_read_processor.py

@@ -150,6 +150,7 @@ def on_record(self, record: Record) -> Iterable[AirbyteMessage]:
             stream_name=record.stream_name,
             data_or_message=record.data,
             is_file_transfer_message=record.is_file_transfer_message,
+            file_reference=record.file_reference,
         )
         stream = self._stream_name_to_instance[record.stream_name]
 

airbyte_cdk/sources/declarative/concurrent_declarative_source.py

@@ -25,6 +25,7 @@
     PerPartitionWithGlobalCursor,
 )
 from airbyte_cdk.sources.declarative.manifest_declarative_source import ManifestDeclarativeSource
+from airbyte_cdk.sources.declarative.models import FileUploader
 from airbyte_cdk.sources.declarative.models.declarative_component_schema import (
     ConcurrencyLevel as ConcurrencyLevelModel,
 )
@@ -206,6 +207,10 @@ def _group_streams(
             # these legacy Python streams the way we do low-code streams to determine if they are concurrent compatible,
             # so we need to treat them as synchronous
 
+            supports_file_transfer = (
+                "file_uploader" in name_to_stream_mapping[declarative_stream.name]
+            )
+
             if (
                 isinstance(declarative_stream, DeclarativeStream)
                 and name_to_stream_mapping[declarative_stream.name]["type"]
@@ -322,6 +327,7 @@ def _group_streams(
                             else None,
                             logger=self.logger,
                             cursor=cursor,
+                            supports_file_transfer=supports_file_transfer,
                         )
                     )
                 elif (
@@ -353,6 +359,7 @@ def _group_streams(
                             cursor_field=None,
                             logger=self.logger,
                             cursor=final_state_cursor,
+                            supports_file_transfer=supports_file_transfer,
                         )
                     )
                 elif (
@@ -406,6 +413,7 @@ def _group_streams(
                             cursor_field=perpartition_cursor.cursor_field.cursor_field_key,
                             logger=self.logger,
                             cursor=perpartition_cursor,
+                            supports_file_transfer=supports_file_transfer,
                         )
                     )
                 else:

airbyte_cdk/sources/declarative/declarative_component_schema.yaml

@@ -1422,6 +1422,42 @@ definitions:
             - "$ref": "#/definitions/LegacyToPerPartitionStateMigration"
             - "$ref": "#/definitions/CustomStateMigration"
         default: []
+      file_uploader:
+        title: File Uploader
+        description: (experimental) Describes how to fetch a file
+        type: object
+        required:
+          - type
+          - requester
+          - download_target_extractor
+        properties:
+          type:
+            type: string
+            enum: [ FileUploader ]
+          requester:
+            description: Requester component that describes how to prepare HTTP requests to send to the source API.
+            anyOf:
+              - "$ref": "#/definitions/CustomRequester"
+              - "$ref": "#/definitions/HttpRequester"
+          download_target_extractor:
+            description: Responsible for fetching the url where the file is located. This is applied on each records and not on the HTTP response
+            anyOf:
+              - "$ref": "#/definitions/CustomRecordExtractor"
+              - "$ref": "#/definitions/DpathExtractor"
+          file_extractor:
+            description: Responsible for fetching the content of the file. If not defined, the assumption is that the whole response body is the file content
+            anyOf:
+              - "$ref": "#/definitions/CustomRecordExtractor"
+              - "$ref": "#/definitions/DpathExtractor"
+          filename_extractor:
+            description: Defines the name to store the file. Stream name is automatically added to the file path. File unique ID can be used to avoid overwriting files. Random UUID will be used if the extractor is not provided.
+            type: string
+            interpolation_context:
+              - config
+              - record
+            examples:
+              - "{{ record.id }}/{{ record.file_name }}/"
+              - "{{ record.id }}_{{ record.file_name }}/"
       $parameters:
         type: object
         additional_properties: true

airbyte_cdk/sources/declarative/extractors/record_selector.py

@@ -15,6 +15,7 @@
 )
 from airbyte_cdk.sources.declarative.interpolation import InterpolatedString
 from airbyte_cdk.sources.declarative.models import SchemaNormalization
+from airbyte_cdk.sources.declarative.retrievers.file_uploader import FileUploader
 from airbyte_cdk.sources.declarative.transformations import RecordTransformation
 from airbyte_cdk.sources.types import Config, Record, StreamSlice, StreamState
 from airbyte_cdk.sources.utils.transform import TypeTransformer
@@ -42,6 +43,7 @@ class RecordSelector(HttpSelector):
     record_filter: Optional[RecordFilter] = None
     transformations: List[RecordTransformation] = field(default_factory=lambda: [])
     transform_before_filtering: bool = False
+    file_uploader: Optional[FileUploader] = None
 
     def __post_init__(self, parameters: Mapping[str, Any]) -> None:
         self._parameters = parameters
@@ -117,7 +119,10 @@ def filter_and_transform(
             transformed_filtered_data, schema=records_schema
         )
         for data in normalized_data:
-            yield Record(data=data, stream_name=self.name, associated_slice=stream_slice)
+            record = Record(data=data, stream_name=self.name, associated_slice=stream_slice)
+            if self.file_uploader:
+                self.file_uploader.upload(record)
+            yield record
 
     def _normalize_by_schema(
         self, records: Iterable[Mapping[str, Any]], schema: Optional[Mapping[str, Any]]

airbyte_cdk/sources/declarative/models/declarative_component_schema.py

@@ -1989,6 +1989,31 @@ class Config:
     parameters: Optional[Dict[str, Any]] = Field(None, alias="$parameters")
 
 
+class FileUploader(BaseModel):
+    type: Literal["FileUploader"]
+    requester: Union[CustomRequester, HttpRequester] = Field(
+        ...,
+        description="Requester component that describes how to prepare HTTP requests to send to the source API.",
+    )
+    download_target_extractor: Union[CustomRecordExtractor, DpathExtractor] = Field(
+        ...,
+        description="Responsible for fetching the url where the file is located. This is applied on each records and not on the HTTP response",
+    )
+    file_extractor: Optional[Union[CustomRecordExtractor, DpathExtractor]] = Field(
+        None,
+        description="Responsible for fetching the content of the file. If not defined, the assumption is that the whole response body is the file content",
+    )
+    filename_extractor: Optional[str] = Field(
+        None,
+        description="Defines the name to store the file. Stream name is automatically added to the file path. File unique ID can be used to avoid overwriting files. Random UUID will be used if the extractor is not provided.",
+        examples=[
+            "{{ record.id }}/{{ record.file_name }}/",
+            "{{ record.id }}_{{ record.file_name }}/",
+        ],
+    )
+    parameters: Optional[Dict[str, Any]] = Field(None, alias="$parameters")
+
+
 class DeclarativeStream(BaseModel):
     class Config:
         extra = Extra.allow
@@ -2047,6 +2072,11 @@ class Config:
         description="Array of state migrations to be applied on the input state",
         title="State Migrations",
     )
+    file_uploader: Optional[FileUploader] = Field(
+        None,
+        description="(experimental) Describes how to fetch a file",
+        title="File Uploader",
+    )
     parameters: Optional[Dict[str, Any]] = Field(None, alias="$parameters")
 
 
@@ -2464,6 +2494,7 @@ class DynamicDeclarativeStream(BaseModel):
 DeclarativeSource1.update_forward_refs()
 DeclarativeSource2.update_forward_refs()
 SelectiveAuthenticator.update_forward_refs()
+FileUploader.update_forward_refs()
 DeclarativeStream.update_forward_refs()
 SessionTokenAuthenticator.update_forward_refs()
 DynamicSchemaLoader.update_forward_refs()

airbyte_cdk/sources/declarative/parsers/model_to_component_factory.py

@@ -102,7 +102,6 @@
 )
 from airbyte_cdk.sources.declarative.models import (
     CustomStateMigration,
-    GzipDecoder,
 )
 from airbyte_cdk.sources.declarative.models.declarative_component_schema import (
     AddedFieldDefinition as AddedFieldDefinitionModel,
@@ -221,6 +220,9 @@
 from airbyte_cdk.sources.declarative.models.declarative_component_schema import (
     ExponentialBackoffStrategy as ExponentialBackoffStrategyModel,
 )
+from airbyte_cdk.sources.declarative.models.declarative_component_schema import (
+    FileUploader as FileUploaderModel,
+)
 from airbyte_cdk.sources.declarative.models.declarative_component_schema import (
     FixedWindowCallRatePolicy as FixedWindowCallRatePolicyModel,
 )
@@ -442,6 +444,7 @@
     SimpleRetriever,
     SimpleRetrieverTestReadDecorator,
 )
+from airbyte_cdk.sources.declarative.retrievers.file_uploader import FileUploader
 from airbyte_cdk.sources.declarative.schema import (
     ComplexFieldType,
     DefaultSchemaLoader,
@@ -633,6 +636,7 @@ def _init_mappings(self) -> None:
             ComponentMappingDefinitionModel: self.create_components_mapping_definition,
             ZipfileDecoderModel: self.create_zipfile_decoder,
             HTTPAPIBudgetModel: self.create_http_api_budget,
+            FileUploaderModel: self.create_file_uploader,
             FixedWindowCallRatePolicyModel: self.create_fixed_window_call_rate_policy,
             MovingWindowCallRatePolicyModel: self.create_moving_window_call_rate_policy,
             UnlimitedCallRatePolicyModel: self.create_unlimited_call_rate_policy,
@@ -1751,6 +1755,11 @@ def create_declarative_stream(
                 transformations.append(
                     self._create_component_from_model(model=transformation_model, config=config)
                 )
+        file_uploader = None
+        if model.file_uploader:
+            file_uploader = self._create_component_from_model(
+                model=model.file_uploader, config=config
+            )
 
         retriever = self._create_component_from_model(
             model=model.retriever,
@@ -1762,6 +1771,7 @@ def create_declarative_stream(
             stop_condition_on_cursor=stop_condition_on_cursor,
             client_side_incremental_sync=client_side_incremental_sync,
             transformations=transformations,
+            file_uploader=file_uploader,
             incremental_sync=model.incremental_sync,
         )
         cursor_field = model.incremental_sync.cursor_field if model.incremental_sync else None
@@ -2603,6 +2613,7 @@ def create_record_selector(
         transformations: List[RecordTransformation] | None = None,
         decoder: Decoder | None = None,
         client_side_incremental_sync: Dict[str, Any] | None = None,
+        file_uploader: Optional[FileUploader] = None,
         **kwargs: Any,
     ) -> RecordSelector:
         extractor = self._create_component_from_model(
@@ -2640,6 +2651,7 @@ def create_record_selector(
             config=config,
             record_filter=record_filter,
             transformations=transformations or [],
+            file_uploader=file_uploader,
             schema_normalization=schema_normalization,
             parameters=model.parameters or {},
             transform_before_filtering=transform_before_filtering,
@@ -2697,6 +2709,7 @@ def create_simple_retriever(
         stop_condition_on_cursor: bool = False,
         client_side_incremental_sync: Optional[Dict[str, Any]] = None,
         transformations: List[RecordTransformation],
+        file_uploader: Optional[FileUploader] = None,
         incremental_sync: Optional[
             Union[
                 IncrementingCountCursorModel, DatetimeBasedCursorModel, CustomIncrementalSyncModel
@@ -2719,6 +2732,7 @@ def create_simple_retriever(
             decoder=decoder,
             transformations=transformations,
             client_side_incremental_sync=client_side_incremental_sync,
+            file_uploader=file_uploader,
         )
         url_base = (
             model.requester.url_base
@@ -3318,6 +3332,30 @@ def create_fixed_window_call_rate_policy(
             matchers=matchers,
         )
 
+    def create_file_uploader(
+        self, model: FileUploaderModel, config: Config, **kwargs: Any
+    ) -> FileUploader:
+        name = "File Uploader"
+        requester = self._create_component_from_model(
+            model=model.requester,
+            config=config,
+            name=name,
+            **kwargs,
+        )
+        download_target_extractor = self._create_component_from_model(
+            model=model.download_target_extractor,
+            config=config,
+            name=name,
+            **kwargs,
+        )
+        return FileUploader(
+            requester=requester,
+            download_target_extractor=download_target_extractor,
+            config=config,
+            parameters=model.parameters or {},
+            filename_extractor=model.filename_extractor if model.filename_extractor else None,
+        )
+
     def create_moving_window_call_rate_policy(
         self, model: MovingWindowCallRatePolicyModel, config: Config, **kwargs: Any
     ) -> MovingWindowCallRatePolicy:

airbyte_cdk/sources/declarative/retrievers/file_uploader.py

@@ -0,0 +1,89 @@
+#
+# Copyright (c) 2025 Airbyte, Inc., all rights reserved.
+#
+
+import json
+import logging
+import uuid
+from dataclasses import InitVar, dataclass, field
+from pathlib import Path
+from typing import Any, Mapping, Optional, Union
+
+from airbyte_cdk.models import AirbyteRecordMessageFileReference
+from airbyte_cdk.sources.declarative.extractors.record_extractor import RecordExtractor
+from airbyte_cdk.sources.declarative.interpolation.interpolated_string import (
+    InterpolatedString,
+)
+from airbyte_cdk.sources.declarative.partition_routers.substream_partition_router import (
+    SafeResponse,
+)
+from airbyte_cdk.sources.declarative.requesters import Requester
+from airbyte_cdk.sources.declarative.types import Record, StreamSlice
+from airbyte_cdk.sources.types import Config
+from airbyte_cdk.sources.utils.files_directory import get_files_directory
+
+logger = logging.getLogger("airbyte")
+
+
+@dataclass
+class FileUploader:
+    requester: Requester
+    download_target_extractor: RecordExtractor
+    config: Config
+    parameters: InitVar[Mapping[str, Any]]
+
+    filename_extractor: Optional[Union[InterpolatedString, str]] = None
+    content_extractor: Optional[RecordExtractor] = None
+
+    def __post_init__(self, parameters: Mapping[str, Any]) -> None:
+        if self.filename_extractor:
+            self.filename_extractor = InterpolatedString.create(
+                self.filename_extractor,
+                parameters=parameters,
+            )
+
+    def upload(self, record: Record) -> None:
+        mocked_response = SafeResponse()
+        mocked_response.content = json.dumps(record.data).encode()
+        download_target = list(self.download_target_extractor.extract_records(mocked_response))[0]
+        if not isinstance(download_target, str):
+            raise ValueError(
+                f"download_target is expected to be a str but was {type(download_target)}: {download_target}"
+            )
+
+        response = self.requester.send_request(
+            stream_slice=StreamSlice(
+                partition={}, cursor_slice={}, extra_fields={"download_target": download_target}
+            ),
+        )
+
+        if self.content_extractor:
+            raise NotImplementedError("TODO")
+        else:
+            files_directory = Path(get_files_directory())
+
+            file_name = (
+                self.filename_extractor.eval(self.config, record=record)
+                if self.filename_extractor
+                else str(uuid.uuid4())
+            )
+            file_name = file_name.lstrip("/")
+            file_relative_path = Path(record.stream_name) / Path(file_name)
+
+            full_path = files_directory / file_relative_path
+            full_path.parent.mkdir(parents=True, exist_ok=True)
+
+            with open(str(full_path), "wb") as f:
+                f.write(response.content)
+            file_size_bytes = full_path.stat().st_size
+
+            logger.info("File uploaded successfully")
+            logger.info(f"File url: {str(full_path)}")
+            logger.info(f"File size: {file_size_bytes / 1024} KB")
+            logger.info(f"File relative path: {str(file_relative_path)}")
+
+            record.file_reference = AirbyteRecordMessageFileReference(
+                file_url=str(full_path),
+                file_relative_path=str(file_relative_path),
+                file_size_bytes=file_size_bytes,
+            )