feat(web基础): 新增零基础Web开发课程

05_web基础/5_3_HTTP响应与状态码/response_status_example.py

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+"""第5-3课标准示例：根据业务结果生成HTTP响应。"""
+
+from http import HTTPStatus
+
+
+BOOKS = {1: "Python入门", 2: "数据库实践"}
+
+
+def find_book(book_id: int) -> dict:
+    """查询图书，并用状态码明确表达查询结果。"""
+
+    title = BOOKS.get(book_id)
+    if title is None:
+        return {
+            "status": HTTPStatus.NOT_FOUND,
+            "headers": {"Content-Type": "application/json; charset=utf-8"},
+            "body": {"message": "图书不存在"},
+        }
+    return {
+        "status": HTTPStatus.OK,
+        "headers": {"Content-Type": "application/json; charset=utf-8"},
+        "body": {"id": book_id, "title": title},
+    }
+
+
+def print_response(response: dict) -> None:
+    """输出响应状态行、响应头和响应体。"""
+
+    status = response["status"]
+    print(f"HTTP/1.1 {status.value} {status.phrase}")
+    print(f"Content-Type: {response['headers']['Content-Type']}")
+    print(f"响应体：{response['body']}")
+
+
+def main() -> None:
+    """分别展示查询成功与资源不存在的响应。"""
+
+    print_response(find_book(1))
+    print("---")
+    print_response(find_book(99))
+
+
+if __name__ == "__main__":
+    main()