banner.py
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| 1 | """Parse ``ok app`` startup banner lines for the desktop launcher.""" |
| 2 | |
| 3 | from __future__ import annotations |
| 4 | |
| 5 | import re |
| 6 | from dataclasses import dataclass |
| 7 | |
| 8 | from tools.desktop.constants import ( |
| 9 | CSRF_PREFIX, |
| 10 | LISTENING_BANNER, |
| 11 | SESSION_PREFIX, |
| 12 | URL_PREFIX, |
| 13 | ) |
| 14 | |
| 15 | _URL_RE = re.compile(r"^url:\s*(\S+)\s*$") |
| 16 | _SESSION_RE = re.compile(r"^session_credential:\s*(\S+)\s*$") |
| 17 | _CSRF_RE = re.compile(r"^csrf_token:\s*(\S+)\s*$") |
| 18 | |
| 19 | |
| 20 | @dataclass(frozen=True) |
| 21 | class StartupBanner: |
| 22 | """Credentials and URL emitted once on ``ok app`` stderr.""" |
| 23 | |
| 24 | url: str |
| 25 | session_credential: str |
| 26 | csrf_token: str |
| 27 | |
| 28 | @property |
| 29 | def origin(self) -> str: |
| 30 | """Return the loopback origin for CORS checks in packaging tests.""" |
| 31 | from urllib.parse import urlparse |
| 32 | |
| 33 | parsed = urlparse(self.url) |
| 34 | return f"{parsed.scheme}://{parsed.hostname}:{parsed.port}" |
| 35 | |
| 36 | |
| 37 | def parse_startup_banner_line(line: str) -> tuple[str, str] | None: |
| 38 | """Parse a single stderr line; return ``(field, value)`` or ``None``.""" |
| 39 | text = line.rstrip("\n") |
| 40 | if text == LISTENING_BANNER: |
| 41 | return ("listening", text) |
| 42 | for pattern, field in ( |
| 43 | (_URL_RE, "url"), |
| 44 | (_SESSION_RE, "session_credential"), |
| 45 | (_CSRF_RE, "csrf_token"), |
| 46 | ): |
| 47 | match = pattern.match(text) |
| 48 | if match: |
| 49 | return (field, match.group(1)) |
| 50 | return None |
| 51 | |
| 52 | |
| 53 | def parse_startup_stderr(lines: list[str]) -> StartupBanner | None: |
| 54 | """Collect banner fields from stderr lines; return ``None`` when incomplete.""" |
| 55 | url: str | None = None |
| 56 | session: str | None = None |
| 57 | csrf: str | None = None |
| 58 | for line in lines: |
| 59 | parsed = parse_startup_banner_line(line) |
| 60 | if parsed is None: |
| 61 | continue |
| 62 | field, value = parsed |
| 63 | if field == "url": |
| 64 | url = value |
| 65 | elif field == "session_credential": |
| 66 | session = value |
| 67 | elif field == "csrf_token": |
| 68 | csrf = value |
| 69 | if url and session and csrf: |
| 70 | return StartupBanner(url=url, session_credential=session, csrf_token=csrf) |
| 71 | return None |