(url: str, cache_path: Path, refresh: bool, timeout: int, min_interval: float, jitter: float, retries: int)
| 101 | |
| 102 | |
| 103 | def fetch(url: str, cache_path: Path, refresh: bool, timeout: int, min_interval: float, jitter: float, retries: int) -> str: |
| 104 | global LAST_REQUEST_AT |
| 105 | if cache_path.exists() and not refresh: |
| 106 | return cache_path.read_text(encoding="utf-8") |
| 107 | |
| 108 | cache_path.parent.mkdir(parents=True, exist_ok=True) |
| 109 | request = Request( |
| 110 | url, |
| 111 | headers={ |
| 112 | "User-Agent": "CommanderData/0.1 (+local Forge deckgen data build)", |
| 113 | "Accept": "text/html,application/xhtml+xml,application/json;q=0.9,*/*;q=0.8", |
| 114 | }, |
| 115 | ) |
| 116 | for attempt in range(retries + 1): |
| 117 | wait_for_rate_limit(min_interval, jitter) |
| 118 | try: |
| 119 | with urlopen(request, timeout=timeout) as response: |
| 120 | LAST_REQUEST_AT = time.monotonic() |
| 121 | body = response.read().decode(response.headers.get_content_charset() or "utf-8", errors="replace") |
| 122 | cache_path.write_text(body, encoding="utf-8") |
| 123 | return body |
| 124 | except HTTPError as exc: |
| 125 | LAST_REQUEST_AT = time.monotonic() |
| 126 | retry_after = exc.headers.get("Retry-After") |
| 127 | if exc.code in RETRY_STATUS_CODES and attempt < retries: |
| 128 | sleep_for = parse_retry_after(retry_after) or min(120.0, min_interval * (2 ** (attempt + 1))) |
| 129 | print(f"warning: {exc.code} for {url}; sleeping {sleep_for:.1f}s before retry", file=sys.stderr) |
| 130 | time.sleep(sleep_for) |
| 131 | continue |
| 132 | raise |
| 133 | except (URLError, TimeoutError): |
| 134 | LAST_REQUEST_AT = time.monotonic() |
| 135 | if attempt < retries: |
| 136 | sleep_for = min(120.0, min_interval * (2 ** (attempt + 1))) |
| 137 | print(f"warning: network error for {url}; sleeping {sleep_for:.1f}s before retry", file=sys.stderr) |
| 138 | time.sleep(sleep_for) |
| 139 | continue |
| 140 | raise |
| 141 | raise RuntimeError(f"unreachable fetch retry state for {url}") |
| 142 | |
| 143 | |
| 144 | def parse_retry_after(value: str | None) -> float | None: |
no test coverage detected