🔒 Security fix: docs_src/app_testing/app_b_py310/main.py

修复方案将硬编码的密码 'coneofsilence' 替换为从环境变量 FAKE_SECRET_TOKEN 获取的值。如果环境变量未设置，程序将抛出运行时错误。这样避免了将敏感信息直接写入代码中，提高了安全性。

docs_src/app_testing/app_b_py310/main.py

@@ -1,3 +1,23 @@
+import os
+from fastapi import FastAPI, Header, HTTPException
+from pydantic import BaseModel
+
+fake_secret_token = os.getenv("FAKE_SECRET_TOKEN")
+if not fake_secret_token:
+    raise RuntimeError("Environment variable FAKE_SECRET_TOKEN is not set.")
+
+fake_db = {
+    "foo": {"id": "foo", "title": "Foo", "description": "There goes my hero"},
+    "bar": {"id": "bar", "title": "Bar", "description": "The bartenders"},
+}
+
+app = FastAPI()
+
+class Item(BaseModel):
+    id: str
+    title: str
+    description: str
+
 from fastapi import FastAPI, Header, HTTPException
 from pydantic import BaseModel