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TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657import type { WebErrorCode, WebResult } from "../shared/web";const messages: Record<WebErrorCode, string> = { invalid_selector: "Use a valid CSS selector, or omit the selector to read the loaded page.", invalid_url: "Use an absolute HTTP or HTTPS URL without credentials.", blocked_url: "Private or local URLs and redirects are not allowed.", timeout: "The research service did not respond within the time limit. Try again or use another source.", cancelled: "Web research was cancelled.", http_error: "The website returned an unsuccessful HTTP response. Try another source.", unsupported_content: "This reader supports HTML, Markdown and plain text. Use a text version of this source.", request_failed: "The website could not be read. Check the URL or try another source.", search_blocked: "The search service blocked or rate-limited this request. Try again later or read a known URL.", search_billing: "Web search requires Cloudflare AI Gateway credits. Add credits or check the gateway's billing configuration.", search_authentication: "Web search access was rejected. Check Cloudflare AI Gateway and OpenAI model access.", search_rate_limited: "Web search is rate-limited. Try again later or read a known URL.", search_unavailable: "Web search is unavailable. Check AI Gateway model access or read a known URL.", invalid_search_response: "The search provider did not return a completed search with usable source metadata. Try again or read a known URL.", browser_unavailable: "The browser service is unavailable. Try again later or read a known URL.", cleanup_failed: "The browser session could not be confirmed closed. It has a short inactivity expiry; try again later.",};export class WebFailure extends Error { constructor( public code: WebErrorCode, public status?: number, ) { super(messages[code]); }}export function webFailure(code: WebErrorCode, status?: number): WebResult { return { ok: false, code, message: messages[code], ...(status === undefined ? {} : { status }), };}export function webError(error: unknown, signal?: AbortSignal): WebResult { if (signal?.aborted) return webFailure( signal.reason instanceof WebFailure ? signal.reason.code : "cancelled", ); if (error instanceof WebFailure) return webFailure(error.code, error.status); return webFailure("request_failed");}