237 lines
9.0 KiB
Python
237 lines
9.0 KiB
Python
from __future__ import annotations
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import json
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from http import HTTPStatus
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from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
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from typing import Any
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from urllib.parse import parse_qs, urlparse
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from .config import APP_BIND, APP_PORT, STATIC_DIR, utc_now
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from .dashboard import build_monitor_payload
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from .nacos import get_nacos_config_list_payload, get_nacos_config_payload, save_nacos_config_payload
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def response_json(payload: dict[str, Any] | list[Any]) -> bytes:
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# 统一把 JSON 编码成 UTF-8 文本。
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return (json.dumps(payload, ensure_ascii=False, indent=2) + "\n").encode("utf-8")
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class MonitorHandler(BaseHTTPRequestHandler):
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# 自定义服务名，便于 curl 时识别来源。
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server_version = "HyAppMonitor/2.0"
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def log_message(self, format: str, *args: Any) -> None: # noqa: A003
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# 关闭默认访问日志，避免轮询刷屏。
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return
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def do_GET(self) -> None: # noqa: N802
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# GET 请求需要响应头和响应体。
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self.dispatch(send_body=True)
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def do_HEAD(self) -> None: # noqa: N802
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# HEAD 请求只返回响应头。
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self.dispatch(send_body=False)
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def do_POST(self) -> None: # noqa: N802
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# POST 请求主要用于配置保存。
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self.dispatch_post()
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def dispatch(self, send_body: bool) -> None:
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# 只解析 URL 的 path 段。
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parsed = urlparse(self.path)
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# 顺手解析 query 参数，后面接口直接取。
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query = parse_qs(parsed.query, keep_blank_values=True)
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# 首页返回静态 HTML。
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if parsed.path in {"/", "/index.html"}:
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return self.serve_static("index.html", "text/html; charset=utf-8", send_body=send_body)
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# CSS 文件。
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if parsed.path == "/app.css":
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return self.serve_static("app.css", "text/css; charset=utf-8", send_body=send_body)
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# 前端业务 JS。
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if parsed.path == "/app.js":
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return self.serve_static("app.js", "application/javascript; charset=utf-8", send_body=send_body)
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# 本地 Vue 运行时。
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if parsed.path == "/vue.js":
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return self.serve_static("vue.js", "application/javascript; charset=utf-8", send_body=send_body)
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# 轻量健康检查。
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if parsed.path == "/api/health":
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return self.send_payload(
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HTTPStatus.OK,
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response_json({"status": "ok", "time": utc_now()}),
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"application/json; charset=utf-8",
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send_body=send_body,
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)
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# 主监控接口。
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if parsed.path == "/api/monitor/services":
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return self.send_payload(
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HTTPStatus.OK,
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response_json(build_monitor_payload()),
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"application/json; charset=utf-8",
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send_body=send_body,
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)
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# 返回当前 namespace 下全部 Nacos 配置元数据。
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if parsed.path == "/api/nacos/configs":
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try:
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payload = get_nacos_config_list_payload()
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except Exception as exc: # noqa: BLE001
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return self.send_error_payload(HTTPStatus.BAD_GATEWAY, str(exc), send_body=send_body)
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return self.send_payload(
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HTTPStatus.OK,
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response_json(payload),
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"application/json; charset=utf-8",
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send_body=send_body,
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)
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# 返回单个配置的原始文本内容。
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if parsed.path == "/api/nacos/config":
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group_name = self.query_value(query, "group")
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data_id = self.query_value(query, "dataId")
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if not group_name or not data_id:
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return self.send_error_payload(
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HTTPStatus.BAD_REQUEST,
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"group and dataId are required",
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send_body=send_body,
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)
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try:
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payload = get_nacos_config_payload(group_name, data_id)
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except Exception as exc: # noqa: BLE001
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return self.send_error_payload(HTTPStatus.BAD_GATEWAY, str(exc), send_body=send_body)
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return self.send_payload(
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HTTPStatus.OK,
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response_json(payload),
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"application/json; charset=utf-8",
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send_body=send_body,
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)
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# favicon 直接返回空。
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if parsed.path == "/favicon.ico":
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return self.send_payload(HTTPStatus.NO_CONTENT, b"", "image/x-icon", send_body=send_body)
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# 其他路径统一 404。
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return self.send_error_payload(HTTPStatus.NOT_FOUND, "not found", send_body=send_body)
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def dispatch_post(self) -> None:
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# 只解析 path 段，POST 不处理复杂 query。
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parsed = urlparse(self.path)
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# 目前只开放 Nacos 配置保存接口。
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if parsed.path != "/api/nacos/config":
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return self.send_error_payload(HTTPStatus.NOT_FOUND, "not found", send_body=True)
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try:
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payload = self.read_json_body()
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except ValueError as exc:
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return self.send_error_payload(HTTPStatus.BAD_REQUEST, str(exc), send_body=True)
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group_name = str(payload.get("group") or "").strip()
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data_id = str(payload.get("dataId") or "").strip()
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content = payload.get("content")
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config_type = str(payload.get("type") or "").strip() or None
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# group / dataId 是保存现有配置的唯一键。
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if not group_name or not data_id:
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return self.send_error_payload(HTTPStatus.BAD_REQUEST, "group and dataId are required", send_body=True)
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# content 必须是字符串；允许保存空串。
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if not isinstance(content, str):
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return self.send_error_payload(HTTPStatus.BAD_REQUEST, "content must be a string", send_body=True)
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try:
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result = save_nacos_config_payload(group_name, data_id, content, config_type=config_type)
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except Exception as exc: # noqa: BLE001
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return self.send_error_payload(HTTPStatus.BAD_GATEWAY, str(exc), send_body=True)
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return self.send_payload(
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HTTPStatus.OK,
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response_json(result),
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"application/json; charset=utf-8",
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send_body=True,
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)
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def query_value(self, query: dict[str, list[str]], key: str) -> str:
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# 统一读取单值 query 参数。
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return str((query.get(key) or [""])[0]).strip()
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def read_json_body(self) -> dict[str, Any]:
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# Content-Length 缺失时按空请求体处理。
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raw_length = self.headers.get("Content-Length", "0").strip() or "0"
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try:
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content_length = int(raw_length)
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except ValueError as exc:
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raise ValueError("invalid Content-Length") from exc
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# 空请求体不符合当前 JSON 接口要求。
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if content_length <= 0:
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raise ValueError("request body is required")
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# 读取原始请求体。
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body = self.rfile.read(content_length).decode("utf-8", errors="replace")
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try:
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payload = json.loads(body)
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except json.JSONDecodeError as exc:
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raise ValueError("request body must be valid json") from exc
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# 顶层必须是对象。
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if not isinstance(payload, dict):
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raise ValueError("request body must be a json object")
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return payload
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def serve_static(self, name: str, content_type: str, send_body: bool) -> None:
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# 计算静态文件路径。
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path = STATIC_DIR / name
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# 文件不存在时返回 JSON 错误。
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if not path.exists():
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return self.send_error_payload(HTTPStatus.NOT_FOUND, "static file missing", send_body=send_body)
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# 文件存在时返回原始二进制内容。
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self.send_payload(HTTPStatus.OK, path.read_bytes(), content_type, send_body=send_body)
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def send_error_payload(self, status: HTTPStatus, message: str, send_body: bool) -> None:
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# 错误响应也统一走 JSON。
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self.send_payload(
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status,
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response_json({"status": int(status), "error": message}),
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"application/json; charset=utf-8",
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send_body=send_body,
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)
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def send_payload(self, status: HTTPStatus, body: bytes, content_type: str, send_body: bool) -> None:
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# 写状态码。
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self.send_response(status)
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# 写内容类型。
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self.send_header("Content-Type", content_type)
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# 页面和接口都禁用缓存。
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self.send_header("Cache-Control", "no-store")
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# 写入长度，便于 HEAD 请求工作正常。
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self.send_header("Content-Length", str(len(body)))
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# 结束响应头。
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self.end_headers()
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# 需要响应体时再写内容。
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if send_body and body:
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self.wfile.write(body)
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def main() -> None:
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# 创建线程型 HTTP 服务。
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server = ThreadingHTTPServer((APP_BIND, APP_PORT), MonitorHandler)
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# 打印监听地址便于排查。
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print(f"hy-app-monitor listening on http://{APP_BIND}:{APP_PORT}", flush=True)
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# 进入永久监听。
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server.serve_forever()
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