FEAT: NEW WORKFLOW ENGINE (#3160)

Co-authored-by: Joel <iamjoel007@gmail.com>
Co-authored-by: Yeuoly <admin@srmxy.cn>
Co-authored-by: JzoNg <jzongcode@gmail.com>
Co-authored-by: StyleZhang <jasonapring2015@outlook.com>
Co-authored-by: jyong <jyong@dify.ai>
Co-authored-by: nite-knite <nkCoding@gmail.com>
Co-authored-by: jyong <718720800@qq.com>

api/controllers/web/workflow.py

@@ -0,0 +1,82 @@
+import logging
+
+from flask_restful import reqparse
+from werkzeug.exceptions import InternalServerError
+
+from controllers.web import api
+from controllers.web.error import (
+    CompletionRequestError,
+    NotWorkflowAppError,
+    ProviderModelCurrentlyNotSupportError,
+    ProviderNotInitializeError,
+    ProviderQuotaExceededError,
+)
+from controllers.web.wraps import WebApiResource
+from core.app.apps.base_app_queue_manager import AppQueueManager
+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 libs import helper
+from models.model import App, AppMode, EndUser
+from services.app_generate_service import AppGenerateService
+
+logger = logging.getLogger(__name__)
+
+
+class WorkflowRunApi(WebApiResource):
+    def post(self, app_model: App, end_user: EndUser):
+        """
+        Run workflow
+        """
+        app_mode = AppMode.value_of(app_model.mode)
+        if app_mode != AppMode.WORKFLOW:
+            raise NotWorkflowAppError()
+
+        parser = reqparse.RequestParser()
+        parser.add_argument('inputs', type=dict, required=True, nullable=False, location='json')
+        parser.add_argument('files', type=list, required=False, location='json')
+        args = parser.parse_args()
+
+        try:
+            response = AppGenerateService.generate(
+                app_model=app_model,
+                user=end_user,
+                args=args,
+                invoke_from=InvokeFrom.WEB_APP,
+                streaming=True
+            )
+
+            return helper.compact_generate_response(response)
+        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 as e:
+            logging.exception("internal server error.")
+            raise InternalServerError()
+
+
+class WorkflowTaskStopApi(WebApiResource):
+    def post(self, app_model: App, end_user: EndUser, task_id: str):
+        """
+        Stop workflow task
+        """
+        app_mode = AppMode.value_of(app_model.mode)
+        if app_mode != AppMode.WORKFLOW:
+            raise NotWorkflowAppError()
+
+        AppQueueManager.set_stop_flag(task_id, InvokeFrom.WEB_APP, end_user.id)
+
+        return {
+            "result": "success"
+        }
+
+
+api.add_resource(WorkflowRunApi, '/workflows/run')
+api.add_resource(WorkflowTaskStopApi, '/workflows/tasks/<string:task_id>/stop')