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@@ -1,36 +1,19 @@ |
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import json |
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from collections.abc import Generator, Iterable |
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from copy import deepcopy |
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from datetime import UTC, datetime |
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from mimetypes import guess_type |
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from typing import Any, Optional, Union, cast |
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from typing import Any, Optional, cast |
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from yarl import URL |
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from core.app.entities.app_invoke_entities import InvokeFrom |
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from core.callback_handler.agent_tool_callback_handler import DifyAgentCallbackHandler |
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from core.callback_handler.workflow_tool_callback_handler import DifyWorkflowCallbackHandler |
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from core.datasource.__base.datasource_plugin import DatasourcePlugin |
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from core.datasource.entities.datasource_entities import ( |
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DatasourceInvokeMessage, |
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DatasourceInvokeMessageBinary, |
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) |
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from core.file import FileType |
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from core.file.models import FileTransferMethod |
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from core.ops.ops_trace_manager import TraceQueueManager |
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from core.tools.__base.tool import Tool |
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from core.tools.entities.tool_entities import ( |
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ToolInvokeMessage, |
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ToolInvokeMessageBinary, |
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ToolInvokeMeta, |
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ToolParameter, |
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) |
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from core.tools.errors import ( |
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ToolEngineInvokeError, |
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ToolInvokeError, |
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ToolNotFoundError, |
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ToolNotSupportedError, |
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ToolParameterValidationError, |
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ToolProviderCredentialValidationError, |
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ToolProviderNotFoundError, |
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) |
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from core.tools.utils.message_transformer import ToolFileMessageTransformer |
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from core.tools.workflow_as_tool.tool import WorkflowTool |
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from extensions.ext_database import db |
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from models.enums import CreatedByRole |
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from models.model import Message, MessageFile |
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@@ -42,149 +25,60 @@ class DatasourceEngine: |
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""" |
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@staticmethod |
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def agent_invoke( |
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tool: Tool, |
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tool_parameters: Union[str, dict], |
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def invoke_first_step( |
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datasource: DatasourcePlugin, |
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datasource_parameters: dict[str, Any], |
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user_id: str, |
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tenant_id: str, |
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message: Message, |
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invoke_from: InvokeFrom, |
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agent_tool_callback: DifyAgentCallbackHandler, |
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trace_manager: Optional[TraceQueueManager] = None, |
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workflow_tool_callback: DifyWorkflowCallbackHandler, |
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conversation_id: Optional[str] = None, |
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app_id: Optional[str] = None, |
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message_id: Optional[str] = None, |
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) -> tuple[str, list[str], ToolInvokeMeta]: |
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) -> Generator[DatasourceInvokeMessage, None, None]: |
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""" |
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Agent invokes the tool with the given arguments. |
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Workflow invokes the datasource with the given arguments. |
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""" |
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# check if arguments is a string |
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if isinstance(tool_parameters, str): |
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# check if this tool has only one parameter |
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parameters = [ |
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parameter |
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for parameter in tool.get_runtime_parameters() |
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if parameter.form == ToolParameter.ToolParameterForm.LLM |
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] |
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if parameters and len(parameters) == 1: |
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tool_parameters = {parameters[0].name: tool_parameters} |
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else: |
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try: |
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tool_parameters = json.loads(tool_parameters) |
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except Exception: |
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pass |
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if not isinstance(tool_parameters, dict): |
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raise ValueError(f"tool_parameters should be a dict, but got a string: {tool_parameters}") |
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try: |
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# hit the callback handler |
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agent_tool_callback.on_tool_start(tool_name=tool.entity.identity.name, tool_inputs=tool_parameters) |
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messages = ToolEngine._invoke(tool, tool_parameters, user_id, conversation_id, app_id, message_id) |
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invocation_meta_dict: dict[str, ToolInvokeMeta] = {} |
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workflow_tool_callback.on_datasource_start(datasource_name=datasource.entity.identity.name, |
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datasource_inputs=datasource_parameters) |
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def message_callback( |
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invocation_meta_dict: dict, messages: Generator[ToolInvokeMessage | ToolInvokeMeta, None, None] |
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): |
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for message in messages: |
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if isinstance(message, ToolInvokeMeta): |
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invocation_meta_dict["meta"] = message |
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else: |
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yield message |
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if datasource.runtime and datasource.runtime.runtime_parameters: |
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datasource_parameters = {**datasource.runtime.runtime_parameters, **datasource_parameters} |
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messages = ToolFileMessageTransformer.transform_tool_invoke_messages( |
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messages=message_callback(invocation_meta_dict, messages), |
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response = datasource._invoke_first_step( |
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user_id=user_id, |
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tenant_id=tenant_id, |
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conversation_id=message.conversation_id, |
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) |
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message_list = list(messages) |
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# extract binary data from tool invoke message |
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binary_files = ToolEngine._extract_tool_response_binary_and_text(message_list) |
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# create message file |
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message_files = ToolEngine._create_message_files( |
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tool_messages=binary_files, agent_message=message, invoke_from=invoke_from, user_id=user_id |
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datasource_parameters=datasource_parameters, |
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conversation_id=conversation_id, |
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app_id=app_id, |
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message_id=message_id, |
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) |
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plain_text = ToolEngine._convert_tool_response_to_str(message_list) |
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meta = invocation_meta_dict["meta"] |
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# hit the callback handler |
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agent_tool_callback.on_tool_end( |
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tool_name=tool.entity.identity.name, |
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tool_inputs=tool_parameters, |
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tool_outputs=plain_text, |
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message_id=message.id, |
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trace_manager=trace_manager, |
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response = workflow_tool_callback.on_datasource_end( |
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datasource_name=datasource.entity.identity.name, |
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datasource_inputs=datasource_parameters, |
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datasource_outputs=response, |
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) |
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# transform tool invoke message to get LLM friendly message |
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return plain_text, message_files, meta |
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except ToolProviderCredentialValidationError as e: |
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error_response = "Please check your tool provider credentials" |
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agent_tool_callback.on_tool_error(e) |
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except (ToolNotFoundError, ToolNotSupportedError, ToolProviderNotFoundError) as e: |
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error_response = f"there is not a tool named {tool.entity.identity.name}" |
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agent_tool_callback.on_tool_error(e) |
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except ToolParameterValidationError as e: |
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error_response = f"tool parameters validation error: {e}, please check your tool parameters" |
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agent_tool_callback.on_tool_error(e) |
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except ToolInvokeError as e: |
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error_response = f"tool invoke error: {e}" |
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agent_tool_callback.on_tool_error(e) |
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except ToolEngineInvokeError as e: |
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meta = e.meta |
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error_response = f"tool invoke error: {meta.error}" |
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agent_tool_callback.on_tool_error(e) |
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return error_response, [], meta |
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return response |
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except Exception as e: |
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error_response = f"unknown error: {e}" |
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agent_tool_callback.on_tool_error(e) |
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return error_response, [], ToolInvokeMeta.error_instance(error_response) |
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workflow_tool_callback.on_tool_error(e) |
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raise e |
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@staticmethod |
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def x( |
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tool: Tool, |
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tool_parameters: dict[str, Any], |
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def invoke_second_step( |
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datasource: DatasourcePlugin, |
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datasource_parameters: dict[str, Any], |
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user_id: str, |
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workflow_tool_callback: DifyWorkflowCallbackHandler, |
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workflow_call_depth: int, |
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thread_pool_id: Optional[str] = None, |
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conversation_id: Optional[str] = None, |
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app_id: Optional[str] = None, |
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message_id: Optional[str] = None, |
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) -> Generator[ToolInvokeMessage, None, None]: |
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) -> Generator[DatasourceInvokeMessage, None, None]: |
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""" |
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Workflow invokes the tool with the given arguments. |
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Workflow invokes the datasource with the given arguments. |
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""" |
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try: |
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# hit the callback handler |
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workflow_tool_callback.on_tool_start(tool_name=tool.entity.identity.name, tool_inputs=tool_parameters) |
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if isinstance(tool, WorkflowTool): |
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tool.workflow_call_depth = workflow_call_depth + 1 |
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tool.thread_pool_id = thread_pool_id |
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if tool.runtime and tool.runtime.runtime_parameters: |
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tool_parameters = {**tool.runtime.runtime_parameters, **tool_parameters} |
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response = tool.invoke( |
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response = datasource._invoke_second_step( |
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user_id=user_id, |
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tool_parameters=tool_parameters, |
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conversation_id=conversation_id, |
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app_id=app_id, |
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message_id=message_id, |
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) |
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# hit the callback handler |
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response = workflow_tool_callback.on_tool_execution( |
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tool_name=tool.entity.identity.name, |
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tool_inputs=tool_parameters, |
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tool_outputs=response, |
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datasource_parameters=datasource_parameters, |
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) |
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return response |
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@@ -192,62 +86,29 @@ class DatasourceEngine: |
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workflow_tool_callback.on_tool_error(e) |
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raise e |
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@staticmethod |
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def _invoke( |
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tool: Tool, |
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tool_parameters: dict, |
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user_id: str, |
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conversation_id: Optional[str] = None, |
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app_id: Optional[str] = None, |
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message_id: Optional[str] = None, |
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) -> Generator[ToolInvokeMessage | ToolInvokeMeta, None, None]: |
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""" |
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Invoke the tool with the given arguments. |
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""" |
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started_at = datetime.now(UTC) |
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meta = ToolInvokeMeta( |
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time_cost=0.0, |
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error=None, |
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tool_config={ |
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"tool_name": tool.entity.identity.name, |
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"tool_provider": tool.entity.identity.provider, |
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"tool_provider_type": tool.tool_provider_type().value, |
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"tool_parameters": deepcopy(tool.runtime.runtime_parameters), |
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"tool_icon": tool.entity.identity.icon, |
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}, |
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) |
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try: |
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yield from tool.invoke(user_id, tool_parameters, conversation_id, app_id, message_id) |
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except Exception as e: |
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meta.error = str(e) |
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raise ToolEngineInvokeError(meta) |
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finally: |
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ended_at = datetime.now(UTC) |
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meta.time_cost = (ended_at - started_at).total_seconds() |
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yield meta |
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@staticmethod |
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def _convert_tool_response_to_str(tool_response: list[ToolInvokeMessage]) -> str: |
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def _convert_datasource_response_to_str(datasource_response: list[DatasourceInvokeMessage]) -> str: |
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""" |
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Handle tool response |
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Handle datasource response |
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""" |
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result = "" |
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for response in tool_response: |
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if response.type == ToolInvokeMessage.MessageType.TEXT: |
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result += cast(ToolInvokeMessage.TextMessage, response.message).text |
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elif response.type == ToolInvokeMessage.MessageType.LINK: |
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for response in datasource_response: |
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if response.type == DatasourceInvokeMessage.MessageType.TEXT: |
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result += cast(DatasourceInvokeMessage.TextMessage, response.message).text |
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elif response.type == DatasourceInvokeMessage.MessageType.LINK: |
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result += ( |
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f"result link: {cast(ToolInvokeMessage.TextMessage, response.message).text}." |
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f"result link: {cast(DatasourceInvokeMessage.TextMessage, response.message).text}." |
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+ " please tell user to check it." |
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) |
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elif response.type in {ToolInvokeMessage.MessageType.IMAGE_LINK, ToolInvokeMessage.MessageType.IMAGE}: |
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elif response.type in {DatasourceInvokeMessage.MessageType.IMAGE_LINK, DatasourceInvokeMessage.MessageType.IMAGE}: |
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result += ( |
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"image has been created and sent to user already, " |
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+ "you do not need to create it, just tell the user to check it now." |
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) |
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elif response.type == ToolInvokeMessage.MessageType.JSON: |
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elif response.type == DatasourceInvokeMessage.MessageType.JSON: |
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result = json.dumps( |
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cast(ToolInvokeMessage.JsonMessage, response.message).json_object, ensure_ascii=False |
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cast(DatasourceInvokeMessage.JsonMessage, response.message).json_object, ensure_ascii=False |
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) |
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else: |
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result += str(response.message) |
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@@ -255,14 +116,14 @@ class DatasourceEngine: |
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return result |
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@staticmethod |
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def _extract_tool_response_binary_and_text( |
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tool_response: list[ToolInvokeMessage], |
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) -> Generator[ToolInvokeMessageBinary, None, None]: |
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def _extract_datasource_response_binary_and_text( |
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datasource_response: list[DatasourceInvokeMessage], |
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) -> Generator[DatasourceInvokeMessageBinary, None, None]: |
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""" |
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Extract tool response binary |
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Extract datasource response binary |
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""" |
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for response in tool_response: |
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if response.type in {ToolInvokeMessage.MessageType.IMAGE_LINK, ToolInvokeMessage.MessageType.IMAGE}: |
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for response in datasource_response: |
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if response.type in {DatasourceInvokeMessage.MessageType.IMAGE_LINK, DatasourceInvokeMessage.MessageType.IMAGE}: |
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mimetype = None |
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if not response.meta: |
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raise ValueError("missing meta data") |
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@@ -270,7 +131,7 @@ class DatasourceEngine: |
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mimetype = response.meta.get("mime_type") |
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else: |
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try: |
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url = URL(cast(ToolInvokeMessage.TextMessage, response.message).text) |
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url = URL(cast(DatasourceInvokeMessage.TextMessage, response.message).text) |
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extension = url.suffix |
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guess_type_result, _ = guess_type(f"a{extension}") |
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if guess_type_result: |
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@@ -281,31 +142,31 @@ class DatasourceEngine: |
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if not mimetype: |
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mimetype = "image/jpeg" |
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yield ToolInvokeMessageBinary( |
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yield DatasourceInvokeMessageBinary( |
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mimetype=response.meta.get("mime_type", "image/jpeg"), |
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url=cast(ToolInvokeMessage.TextMessage, response.message).text, |
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url=cast(DatasourceInvokeMessage.TextMessage, response.message).text, |
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) |
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elif response.type == ToolInvokeMessage.MessageType.BLOB: |
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elif response.type == DatasourceInvokeMessage.MessageType.BLOB: |
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if not response.meta: |
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raise ValueError("missing meta data") |
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yield ToolInvokeMessageBinary( |
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yield DatasourceInvokeMessageBinary( |
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mimetype=response.meta.get("mime_type", "application/octet-stream"), |
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url=cast(ToolInvokeMessage.TextMessage, response.message).text, |
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url=cast(DatasourceInvokeMessage.TextMessage, response.message).text, |
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) |
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elif response.type == ToolInvokeMessage.MessageType.LINK: |
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elif response.type == DatasourceInvokeMessage.MessageType.LINK: |
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# check if there is a mime type in meta |
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if response.meta and "mime_type" in response.meta: |
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yield ToolInvokeMessageBinary( |
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yield DatasourceInvokeMessageBinary( |
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mimetype=response.meta.get("mime_type", "application/octet-stream") |
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if response.meta |
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else "application/octet-stream", |
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url=cast(ToolInvokeMessage.TextMessage, response.message).text, |
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url=cast(DatasourceInvokeMessage.TextMessage, response.message).text, |
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) |
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@staticmethod |
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def _create_message_files( |
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tool_messages: Iterable[ToolInvokeMessageBinary], |
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datasource_messages: Iterable[DatasourceInvokeMessageBinary], |
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agent_message: Message, |
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invoke_from: InvokeFrom, |
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user_id: str, |
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@@ -317,7 +178,7 @@ class DatasourceEngine: |
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""" |
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result = [] |
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for message in tool_messages: |
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for message in datasource_messages: |
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if "image" in message.mimetype: |
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file_type = FileType.IMAGE |
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elif "video" in message.mimetype: |