feat(awel): AWEL supports http trigger

examples/awel/simple_chat_dag_example.py

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+"""AWEL: Simple chat dag example
+
+    Example:
+
+    .. code-block:: shell
+
+        curl -X POST http://127.0.0.1:5000/api/v1/awel/trigger/examples/simple_chat \
+        -H "Content-Type: application/json" -d '{
+            "model": "proxyllm",
+            "user_input": "hello"
+        }'
+"""
+from typing import Dict
+from pydantic import BaseModel, Field
+
+from pilot.awel import DAG, HttpTrigger, MapOperator
+from pilot.scene.base_message import ModelMessage
+from pilot.model.base import ModelOutput
+from pilot.model.operator.model_operator import ModelOperator
+
+
+class TriggerReqBody(BaseModel):
+    model: str = Field(..., description="Model name")
+    user_input: str = Field(..., description="User input")
+
+
+class RequestHandleOperator(MapOperator[TriggerReqBody, Dict]):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    async def map(self, input_value: TriggerReqBody) -> Dict:
+        hist = []
+        hist.append(ModelMessage.build_human_message(input_value.user_input))
+        hist = list(h.dict() for h in hist)
+        params = {
+            "prompt": input_value.user_input,
+            "messages": hist,
+            "model": input_value.model,
+            "echo": False,
+        }
+        print(f"Receive input value: {input_value}")
+        return params
+
+
+with DAG("dbgpt_awel_simple_dag_example") as dag:
+    # Receive http request and trigger dag to run.
+    trigger = HttpTrigger(
+        "/examples/simple_chat", methods="POST", request_body=TriggerReqBody
+    )
+    request_handle_task = RequestHandleOperator()
+    model_task = ModelOperator()
+    # type(out) == ModelOutput
+    model_parse_task = MapOperator(lambda out: out.to_dict())
+    trigger >> request_handle_task >> model_task >> model_parse_task

examples/awel/simple_dag_example.py

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+"""AWEL: Simple dag example
+
+    Example:
+
+    .. code-block:: shell
+
+        curl -X GET http://127.0.0.1:5000/api/v1/awel/trigger/examples/hello\?name\=zhangsan
+
+"""
+from pydantic import BaseModel, Field
+
+from pilot.awel import DAG, HttpTrigger, MapOperator
+
+
+class TriggerReqBody(BaseModel):
+    name: str = Field(..., description="User name")
+    age: int = Field(18, description="User age")
+
+
+class RequestHandleOperator(MapOperator[TriggerReqBody, str]):
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
+
+    async def map(self, input_value: TriggerReqBody) -> str:
+        print(f"Receive input value: {input_value}")
+        return f"Hello, {input_value.name}, your age is {input_value.age}"
+
+
+with DAG("simple_dag_example") as dag:
+    trigger = HttpTrigger("/examples/hello", request_body=TriggerReqBody)
+    map_node = RequestHandleOperator()
+    trigger >> map_node