feat(signalr): support json & msgpack protocol for all hubs

app/utils.py

@@ -4,3 +4,55 @@ from __future__ import annotations
 def unix_timestamp_to_windows(timestamp: int) -> int:
     """Convert a Unix timestamp to a Windows timestamp."""
     return (timestamp + 62135596800) * 10_000_000
+
+
+def camel_to_snake(name: str) -> str:
+    """Convert a camelCase string to snake_case."""
+    result = []
+    last_chr = ""
+    for char in name:
+        if char.isupper():
+            if not last_chr.isupper() and result:
+                result.append("_")
+            result.append(char.lower())
+        else:
+            result.append(char)
+        last_chr = char
+    return "".join(result)
+
+
+def snake_to_camel(name: str, lower_case: bool = True) -> str:
+    """Convert a snake_case string to camelCase."""
+    if not name:
+        return name
+
+    parts = name.split("_")
+    if not parts:
+        return name
+
+    # 常见缩写词列表
+    abbreviations = {
+        "id",
+        "url",
+        "api",
+        "http",
+        "https",
+        "xml",
+        "json",
+        "css",
+        "html",
+        "sql",
+        "db",
+    }
+
+    result = []
+    for part in parts:
+        if part.lower() in abbreviations:
+            result.append(part.upper())
+        else:
+            if result or not lower_case:
+                result.append(part.capitalize())
+            else:
+                result.append(part.lower())
+
+    return "".join(result)