fix: drop dead code phase2 unused class (#22042)

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

api/core/helper/url_signer.py

@@ -1,52 +0,0 @@
-import base64
-import hashlib
-import hmac
-import os
-import time
-
-from pydantic import BaseModel, Field
-
-from configs import dify_config
-
-
-class SignedUrlParams(BaseModel):
-    sign_key: str = Field(..., description="The sign key")
-    timestamp: str = Field(..., description="Timestamp")
-    nonce: str = Field(..., description="Nonce")
-    sign: str = Field(..., description="Signature")
-
-
-class UrlSigner:
-    @classmethod
-    def get_signed_url(cls, url: str, sign_key: str, prefix: str) -> str:
-        signed_url_params = cls.get_signed_url_params(sign_key, prefix)
-        return (
-            f"{url}?timestamp={signed_url_params.timestamp}"
-            f"&nonce={signed_url_params.nonce}&sign={signed_url_params.sign}"
-        )
-
-    @classmethod
-    def get_signed_url_params(cls, sign_key: str, prefix: str) -> SignedUrlParams:
-        timestamp = str(int(time.time()))
-        nonce = os.urandom(16).hex()
-        sign = cls._sign(sign_key, timestamp, nonce, prefix)
-
-        return SignedUrlParams(sign_key=sign_key, timestamp=timestamp, nonce=nonce, sign=sign)
-
-    @classmethod
-    def verify(cls, sign_key: str, timestamp: str, nonce: str, sign: str, prefix: str) -> bool:
-        recalculated_sign = cls._sign(sign_key, timestamp, nonce, prefix)
-
-        return sign == recalculated_sign
-
-    @classmethod
-    def _sign(cls, sign_key: str, timestamp: str, nonce: str, prefix: str) -> str:
-        if not dify_config.SECRET_KEY:
-            raise Exception("SECRET_KEY is not set")
-
-        data_to_sign = f"{prefix}|{sign_key}|{timestamp}|{nonce}"
-        secret_key = dify_config.SECRET_KEY.encode()
-        sign = hmac.new(secret_key, data_to_sign.encode(), hashlib.sha256).digest()
-        encoded_sign = base64.urlsafe_b64encode(sign).decode()
-
-        return encoded_sign