{"record":{"id":"8e7284b5ab2a806a","repo":"soxoj/maigret","slug":"problem-while-attempting-to-access-data-file-url","errorCode":null,"errorMessage":"Problem while attempting to access data file URL '{url}':  {str(error)}","messagePattern":"Problem while attempting to access data file URL '(.+?)':  (.+?)","errorType":"exception","errorClass":"FileNotFoundError","httpStatus":null,"severity":"error","filePath":"maigret/sites.py","lineNumber":564,"sourceCode":"\n    def load_from_path(self, path: str) -> \"MaigretDatabase\":\n        if '://' in path:\n            return self.load_from_http(path)\n        else:\n            return self.load_from_file(path)\n\n    def load_from_http(self, url: str) -> \"MaigretDatabase\":\n        is_url_valid = url.startswith(\"http://\") or url.startswith(\"https://\")\n\n        if not is_url_valid:\n            raise FileNotFoundError(f\"Invalid data file URL '{url}'.\")\n\n        import requests\n\n        try:\n            response = requests.get(url=url)\n        except Exception as error:\n            raise FileNotFoundError(\n                f\"Problem while attempting to access \"\n                f\"data file URL '{url}':  \"\n                f\"{str(error)}\"\n            )\n\n        if response.status_code == 200:\n            try:\n                data = response.json()\n            except Exception as error:\n                raise ValueError(\n                    f\"Problem parsing json contents at \" f\"'{url}':  {str(error)}.\"\n                )\n        else:\n            raise FileNotFoundError(\n                f\"Bad response while accessing \" f\"data file URL '{url}'.\"\n            )\n\n        return self.load_from_json(data)","sourceCodeStart":546,"sourceCodeEnd":582,"githubUrl":"https://github.com/soxoj/maigret/blob/41674631a92a4c3ea630d046ba125cb750c03798/maigret/sites.py#L546-L582","documentation":"load_from_http() wraps the requests.get(url) call in a broad try/except; any exception raised while performing the HTTP request (DNS failure, connection refused, TLS error, timeout, missing 'requests' package import errors inside the call scope) is re-raised as FileNotFoundError with the original error text appended. It signals the remote JSON database could not be fetched at all, not that it was malformed. The original cause is not chained (no 'from error'), so the appended string is the only diagnostic.","triggerScenarios":"Calling db.load_from_http('https://down.example.com/data.json') where the host does not resolve, the server refuses connections, a proxy blocks the request, TLS certificate verification fails, or the machine is offline. Also raised if requests.get itself throws for any reason (e.g. invalid URL characters that pass the scheme check).","commonSituations":"Corporate networks with mandatory proxies, CI runners without network access, mistyped hostnames, captive portals, self-signed certificates, or attempting to fetch from a raw GitHub URL while rate-limited/blocked. Note there is no timeout parameter, so hangs are also possible.","solutions":["Verify network connectivity and the URL from the same environment (curl -I <url>).","Fix proxy/TLS issues: set HTTPS_PROXY, or install the corporate CA bundle if certificate verification fails.","Pin a local copy of the data file and call load_from_file() instead of fetching remotely.","If requests.get fails due to the missing library, install dependencies: pip install maigret[full] / pip install requests."],"exampleFix":"// before\ndb = MaigretDatabase().load_from_path('https://unreachable-host.example/data.json')\n\n// after\nimport requests\nurl = 'https://raw.githubusercontent.com/soxoj/maigret/main/resources/data.json'\ntry:\n    requests.get(url, timeout=10).raise_for_status()\nexcept requests.RequestException:\n    db = MaigretDatabase().load_from_file('resources/data.json')  # local fallback\nelse:\n    db = MaigretDatabase().load_from_path(url)","handlingStrategy":"try-catch","validationCode":"import requests\n\nresp = requests.get(url, timeout=15)  # probe before handing to maigret\nresp.raise_for_status()","typeGuard":null,"tryCatchPattern":"from maigret.sites import MaigretDatabase\n\ntry:\n    db = MaigretDatabase().load_from_http(url)\nexcept FileNotFoundError as err:\n    # covers both invalid-URL and request-failure cases; inspect message or pre-validate URL\n    logger.warning('remote db unavailable, falling back to local: %s', err)\n    db = MaigretDatabase().load_from_file(local_path)","preventionTips":["Pre-flight the URL with requests.get(url, timeout=...) since maigret sets no timeout.","Keep a vendored copy of resources/data.json as a fallback.","Configure proxy env vars (HTTP_PROXY/HTTPS_PROXY) in restricted networks."],"tags":["network","http","connection-error","maigret"],"backgroundTag":"http-request-failed","analyzedSha":"41674631a92a4c3ea630d046ba125cb750c03798","analyzedAt":"2026-08-27T02:53:58.946Z","schemaVersion":2},"datasetVersion":"2026-08-27T03:17:27.898Z"}