Feat:update webhook component (#11739)

### What problem does this PR solve?
issue:
https://github.com/infiniflow/ragflow/issues/10427

https://github.com/infiniflow/ragflow/issues/8115

change:

- Support for Multiple HTTP Methods (POST / GET / PUT / PATCH / DELETE /
HEAD)
- Security Validation
  1. max_body_size
  2. IP whitelist
  3. rate limit
  4. token / basic / jwt authentication
- File Upload Support
- Unified Content-Type Handling
- Full Schema-Based Extraction & Type Validation
- Two Execution Modes: Immediately / Streaming


### Type of change

- [x] New Feature (non-breaking change which adds functionality)

agent/component/base.py

@@ -361,7 +361,7 @@ class ComponentParamBase(ABC):
 class ComponentBase(ABC):
     component_name: str
     thread_limiter = asyncio.Semaphore(int(os.environ.get("MAX_CONCURRENT_CHATS", 10)))
-    variable_ref_patt = r"\{* *\{([a-zA-Z_:0-9]+@[A-Za-z0-9_.]+|sys\.[A-Za-z0-9_.]+|env\.[A-Za-z0-9_.]+)\} *\}*"
+    variable_ref_patt = r"\{* *\{([a-zA-Z:0-9]+@[A-Za-z0-9_.-]+|sys\.[A-Za-z0-9_.]+|env\.[A-Za-z0-9_.]+)\} *\}*"
 
     def __str__(self):
         """

agent/component/begin.py

@@ -28,7 +28,7 @@ class BeginParam(UserFillUpParam):
         self.prologue = "Hi! I'm your smart assistant. What can I do for you?"
 
     def check(self):
-        self.check_valid_value(self.mode, "The 'mode' should be either `conversational` or `task`", ["conversational", "task"])
+        self.check_valid_value(self.mode, "The 'mode' should be either `conversational` or `task`", ["conversational", "task","Webhook"])
 
     def get_input_form(self) -> dict[str, dict]:
         return getattr(self, "inputs")

agent/component/webhook.py

@@ -1,38 +0,0 @@
-#
-#  Copyright 2024 The InfiniFlow Authors. All Rights Reserved.
-#
-#  Licensed under the Apache License, Version 2.0 (the "License");
-#  you may not use this file except in compliance with the License.
-#  You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-#  Unless required by applicable law or agreed to in writing, software
-#  distributed under the License is distributed on an "AS IS" BASIS,
-#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-#  See the License for the specific language governing permissions and
-#  limitations under the License.
-#
-from agent.component.base import ComponentParamBase, ComponentBase
-
-
-class WebhookParam(ComponentParamBase):
-
-    """
-    Define the Begin component parameters.
-    """
-    def __init__(self):
-        super().__init__()
-
-    def get_input_form(self) -> dict[str, dict]:
-        return getattr(self, "inputs")
-
-
-class Webhook(ComponentBase):
-    component_name = "Webhook"
-
-    def _invoke(self, **kwargs):
-        pass
-
-    def thoughts(self) -> str:
-        return ""