dify / api /controllers /web /message.py
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import logging
from flask_restful import fields, marshal_with, reqparse
from flask_restful.inputs import int_range
from werkzeug.exceptions import InternalServerError, NotFound
import services
from controllers.web import api
from controllers.web.error import (
AppMoreLikeThisDisabledError,
AppSuggestedQuestionsAfterAnswerDisabledError,
CompletionRequestError,
NotChatAppError,
NotCompletionAppError,
ProviderModelCurrentlyNotSupportError,
ProviderNotInitializeError,
ProviderQuotaExceededError,
)
from controllers.web.wraps import WebApiResource
from core.app.entities.app_invoke_entities import InvokeFrom
from core.errors.error import ModelCurrentlyNotSupportError, ProviderTokenNotInitError, QuotaExceededError
from core.model_runtime.errors.invoke import InvokeError
from fields.conversation_fields import message_file_fields
from fields.message_fields import agent_thought_fields
from fields.raws import FilesContainedField
from libs import helper
from libs.helper import TimestampField, uuid_value
from models.model import AppMode
from services.app_generate_service import AppGenerateService
from services.errors.app import MoreLikeThisDisabledError
from services.errors.conversation import ConversationNotExistsError
from services.errors.message import MessageNotExistsError, SuggestedQuestionsAfterAnswerDisabledError
from services.message_service import MessageService
class MessageListApi(WebApiResource):
feedback_fields = {"rating": fields.String}
retriever_resource_fields = {
"id": fields.String,
"message_id": fields.String,
"position": fields.Integer,
"dataset_id": fields.String,
"dataset_name": fields.String,
"document_id": fields.String,
"document_name": fields.String,
"data_source_type": fields.String,
"segment_id": fields.String,
"score": fields.Float,
"hit_count": fields.Integer,
"word_count": fields.Integer,
"segment_position": fields.Integer,
"index_node_hash": fields.String,
"content": fields.String,
"created_at": TimestampField,
}
message_fields = {
"id": fields.String,
"conversation_id": fields.String,
"parent_message_id": fields.String,
"inputs": FilesContainedField,
"query": fields.String,
"answer": fields.String(attribute="re_sign_file_url_answer"),
"message_files": fields.List(fields.Nested(message_file_fields)),
"feedback": fields.Nested(feedback_fields, attribute="user_feedback", allow_null=True),
"retriever_resources": fields.List(fields.Nested(retriever_resource_fields)),
"created_at": TimestampField,
"agent_thoughts": fields.List(fields.Nested(agent_thought_fields)),
"status": fields.String,
"error": fields.String,
}
message_infinite_scroll_pagination_fields = {
"limit": fields.Integer,
"has_more": fields.Boolean,
"data": fields.List(fields.Nested(message_fields)),
}
@marshal_with(message_infinite_scroll_pagination_fields)
def get(self, app_model, end_user):
app_mode = AppMode.value_of(app_model.mode)
if app_mode not in {AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT}:
raise NotChatAppError()
parser = reqparse.RequestParser()
parser.add_argument("conversation_id", required=True, type=uuid_value, location="args")
parser.add_argument("first_id", type=uuid_value, location="args")
parser.add_argument("limit", type=int_range(1, 100), required=False, default=20, location="args")
args = parser.parse_args()
try:
return MessageService.pagination_by_first_id(
app_model, end_user, args["conversation_id"], args["first_id"], args["limit"], "desc"
)
except services.errors.conversation.ConversationNotExistsError:
raise NotFound("Conversation Not Exists.")
except services.errors.message.FirstMessageNotExistsError:
raise NotFound("First Message Not Exists.")
class MessageFeedbackApi(WebApiResource):
def post(self, app_model, end_user, message_id):
message_id = str(message_id)
parser = reqparse.RequestParser()
parser.add_argument("rating", type=str, choices=["like", "dislike", None], location="json")
args = parser.parse_args()
try:
MessageService.create_feedback(app_model, message_id, end_user, args["rating"])
except services.errors.message.MessageNotExistsError:
raise NotFound("Message Not Exists.")
return {"result": "success"}
class MessageMoreLikeThisApi(WebApiResource):
def get(self, app_model, end_user, message_id):
if app_model.mode != "completion":
raise NotCompletionAppError()
message_id = str(message_id)
parser = reqparse.RequestParser()
parser.add_argument(
"response_mode", type=str, required=True, choices=["blocking", "streaming"], location="args"
)
args = parser.parse_args()
streaming = args["response_mode"] == "streaming"
try:
response = AppGenerateService.generate_more_like_this(
app_model=app_model,
user=end_user,
message_id=message_id,
invoke_from=InvokeFrom.WEB_APP,
streaming=streaming,
)
return helper.compact_generate_response(response)
except MessageNotExistsError:
raise NotFound("Message Not Exists.")
except MoreLikeThisDisabledError:
raise AppMoreLikeThisDisabledError()
except ProviderTokenNotInitError as ex:
raise ProviderNotInitializeError(ex.description)
except QuotaExceededError:
raise ProviderQuotaExceededError()
except ModelCurrentlyNotSupportError:
raise ProviderModelCurrentlyNotSupportError()
except InvokeError as e:
raise CompletionRequestError(e.description)
except ValueError as e:
raise e
except Exception:
logging.exception("internal server error.")
raise InternalServerError()
class MessageSuggestedQuestionApi(WebApiResource):
def get(self, app_model, end_user, message_id):
app_mode = AppMode.value_of(app_model.mode)
if app_mode not in {AppMode.CHAT, AppMode.AGENT_CHAT, AppMode.ADVANCED_CHAT}:
raise NotCompletionAppError()
message_id = str(message_id)
try:
questions = MessageService.get_suggested_questions_after_answer(
app_model=app_model, user=end_user, message_id=message_id, invoke_from=InvokeFrom.WEB_APP
)
except MessageNotExistsError:
raise NotFound("Message not found")
except ConversationNotExistsError:
raise NotFound("Conversation not found")
except SuggestedQuestionsAfterAnswerDisabledError:
raise AppSuggestedQuestionsAfterAnswerDisabledError()
except ProviderTokenNotInitError as ex:
raise ProviderNotInitializeError(ex.description)
except QuotaExceededError:
raise ProviderQuotaExceededError()
except ModelCurrentlyNotSupportError:
raise ProviderModelCurrentlyNotSupportError()
except InvokeError as e:
raise CompletionRequestError(e.description)
except Exception:
logging.exception("internal server error.")
raise InternalServerError()
return {"data": questions}
api.add_resource(MessageListApi, "/messages")
api.add_resource(MessageFeedbackApi, "/messages/<uuid:message_id>/feedbacks")
api.add_resource(MessageMoreLikeThisApi, "/messages/<uuid:message_id>/more-like-this")
api.add_resource(MessageSuggestedQuestionApi, "/messages/<uuid:message_id>/suggested-questions")