Method fetchOnce

src/tools/web/duckduckgo.ts:84–108

One fetch against a DDG endpoint with its own timeout/abort wiring.

(url: string, query: string, timeoutMs: number, outer?: AbortSignal)

  /** One fetch against a DDG endpoint with its own timeout/abort wiring. */
  private async fetchOnce(url: string, query: string, timeoutMs: number, outer?: AbortSignal): Promise<string> {
    const internalAbort = new AbortController();
    const timer = setTimeout(() => internalAbort.abort(), timeoutMs);
    const onOuterAbort = (): void => internalAbort.abort();
    outer?.addEventListener('abort', onOuterAbort);
    try {
      const params = new URLSearchParams({ q: query, kl: 'wt-wt' }); // kl=wt-wt = world, no region bias
      const res = await proxyFetch(url, {
        method: 'POST',
        headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'User-Agent': UA,
          'Accept': 'text/html,application/xhtml+xml',
          'Accept-Language': 'en-US,en;q=0.9',
        },
        body: params.toString(),
        signal: internalAbort.signal,
      });
      if (!res.ok) throw new WebSearchError(`DuckDuckGo returned HTTP ${res.status}`, this.name);
      return await res.text();
    } finally {
      clearTimeout(timer);
      outer?.removeEventListener('abort', onOuterAbort);
    }
  }
}

function looksLikeBlockPage(html: string): boolean {