92 lines
3.5 KiB
Python
92 lines
3.5 KiB
Python
"""Loopback-only, empty-data UI preview. Never used by the production runtime."""
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from __future__ import annotations
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import argparse
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from dataclasses import replace
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from typing import Mapping
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from urllib.parse import urlsplit
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from arr_web.app import PortalApplication, SessionLedger
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from arr_web.contracts import PortalError, Response, failure
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from arr_web.repository import UnavailablePortalRepository
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from arr_web.server import serve
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class EmptyPreviewRepository(UnavailablePortalRepository):
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def list_jobs(self, month_key, limit=50, offset=0):
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return [], 0
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def list_monthly_runs(self, month_key, limit=50, offset=0):
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return [], 0
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def list_history_month_counts(self):
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return []
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def list_months(self):
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return []
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class ReadOnlyPreview:
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"""Render the actual portal with unavailable services and no external state."""
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def __init__(self) -> None:
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self._sessions = SessionLedger()
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self._app = PortalApplication(
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repository=EmptyPreviewRepository(), sessions=self._sessions
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)
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def handle(
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self, method: str, target: str, headers: Mapping[str, str],
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body: bytes = b"", client_id: str = "direct",
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) -> Response:
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if method != "GET":
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return Response.json(405, failure(PortalError(
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"PREVIEW_READ_ONLY", "本地预览仅供查看，不能提交业务操作。", 405
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)), headers={"Allow": "GET"})
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path = urlsplit(target).path
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if path == "/assets/preview.css":
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return Response(200, (
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".local-preview-banner{margin:0 0 20px;padding:12px 16px;"
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"border:1px solid var(--line);border-radius:12px;"
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"background:var(--blue-soft);color:var(--ink);font-size:13px}"
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).encode(), "text/css; charset=utf-8", {"Cache-Control": "no-store"})
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# Internal, transient identity belongs only to this empty preview instance.
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# No browser cookie, credentials, runtime configuration or real service is used.
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session_id, _ = self._sessions.issue("")
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request_headers = {k: v for k, v in headers.items() if k.lower() != "cookie"}
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request_headers["Cookie"] = f"arr_session={session_id}"
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try:
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response = self._app.handle(method, target, request_headers, body, client_id)
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finally:
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self._sessions.revoke(session_id)
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if path in {"/", "/index.html"} and response.status == 200:
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html = response.body.decode("utf-8").replace(
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"<title>ARR Report</title>", "<title>ARR Report · 本地只读预览</title>"
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).replace(
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"</head>", '<link rel="stylesheet" href="/assets/preview.css" /></head>'
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).replace(
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'<main class="shell page" id="main-content">',
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'<main class="shell page" id="main-content">'
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'<aside class="local-preview-banner" role="note">'
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'<strong>本地只读预览</strong> · 仅展示页面，未连接业务数据；'
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'上传和自动下载均未启用。</aside>',
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)
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response = replace(response, body=html.encode("utf-8"))
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return response
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def main() -> None:
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parser = argparse.ArgumentParser(description=__doc__)
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parser.add_argument("--port", type=int, default=8872)
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args = parser.parse_args()
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print(f"Read-only preview: http://127.0.0.1:{args.port}/", flush=True)
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serve(ReadOnlyPreview(), "127.0.0.1", args.port)
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if __name__ == "__main__":
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main()
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