{"record":{"id":"01488bc9f2f26902","repo":"D4Vinci/Scrapling","slug":"init-script-is-not-a-file-value","errorCode":null,"errorMessage":"Init script is not a file: {value}","messagePattern":"Init script is not a file: (.+?)","errorType":"validation","errorClass":"ValueError","httpStatus":null,"severity":"error","filePath":"scrapling/engines/_browsers/_validators.py","lineNumber":128,"sourceCode":"            cdp_msg = _is_invalid_cdp_url(self.cdp_url)\n            if cdp_msg:\n                raise ValueError(cdp_msg)\n\n        if not self.cookies:\n            self.cookies = []\n        if not self.extra_flags:\n            self.extra_flags = []\n        if not self.selector_config:\n            self.selector_config = {}\n        if not self.additional_args:\n            self.additional_args = {}\n        if not self.capture_xhr:\n            self.capture_xhr = None\n\n        if self.init_script is not None:\n            validation_msg = _is_invalid_file_path(self.init_script)\n            if validation_msg:\n                raise ValueError(validation_msg)\n\n        if self.executable_path is not None:\n            validation_msg = _is_invalid_file_path(self.executable_path, \"Browser executable\")\n            if validation_msg:\n                raise ValueError(validation_msg)\n\n        if self.block_ads:\n            from scrapling.engines.toolbelt.ad_domains import AD_DOMAINS\n\n            if self.blocked_domains:\n                self.blocked_domains = self.blocked_domains | set(AD_DOMAINS)\n            else:\n                self.blocked_domains = set(AD_DOMAINS)\n\n\nclass StealthConfig(PlaywrightConfig, kw_only=True, frozen=False, weakref=True):\n    allow_webgl: bool = True\n    hide_canvas: bool = False","sourceCodeStart":110,"sourceCodeEnd":146,"githubUrl":"https://github.com/D4Vinci/Scrapling/blob/5d213a2d4764002bfc4fed33c32fe09fa8b0bf7f/scrapling/engines/_browsers/_validators.py#L110-L146","documentation":"Raised when init_script points to an existing path but it is not a regular file (Path.is_file() is False) — typically a directory or a special file. Scrapling needs a readable JS file to inject, so directories/symlinks-to-dirs are rejected.","triggerScenarios":"Passing a directory path (e.g. the folder containing several scripts) as init_script, or a device/socket path.","commonSituations":"Assuming init_script accepts a directory of scripts; globbing that returns a directory; pointing at /dev/... special files.","solutions":["Pass the path to the actual .js file, not its containing directory","Concatenate scripts yourself if you have several, then pass one file"],"exampleFix":"// before\nsession = StealthySession(init_script='/app/inject_scripts')  # a directory\n\n// after\nsession = StealthySession(init_script='/app/inject_scripts/stealth.js')","handlingStrategy":"validation","validationCode":"from pathlib import Path\nassert Path(init_script).is_file(), 'init_script must be a file, not a directory'","typeGuard":"def is_script_file(p: str) -> bool:\n    path = Path(p)\n    return path.is_file() and path.suffix == '.js'","tryCatchPattern":null,"preventionTips":["Pass the .js file path itself, never its parent directory","If you have multiple scripts, concatenate them into one file before passing"],"tags":["validation","file-path","init-script"],"backgroundTag":null,"analyzedSha":"5d213a2d4764002bfc4fed33c32fe09fa8b0bf7f","analyzedAt":"2026-08-14T22:23:09.440Z","schemaVersion":2},"datasetVersion":"2026-08-15T22:17:37.221Z"}