Function call

src/tools/WebFetchTool/WebFetchTool.ts:275–375

(
    { url, prompt },
    { abortController, options: { isNonInteractiveSession } },
  )

  renderToolUseProgressMessage,
  renderToolResultMessage,
  async call(
    { url, prompt },
    { abortController, options: { isNonInteractiveSession } },
  ) {
    const start = Date.now()

    const response = await getURLMarkdownContent(url, abortController)

    // Check if we got a redirect to a different host
    if ('type' in response && response.type === 'redirect') {
      const statusText =
        response.statusCode === 301
          ? 'Moved Permanently'
          : response.statusCode === 308
            ? 'Permanent Redirect'
            : response.statusCode === 307
              ? 'Temporary Redirect'
              : 'Found'

      const message = `REDIRECT DETECTED: The URL redirects to a different host.

Original URL: ${response.originalUrl}
Redirect URL: ${response.redirectUrl}
Status: ${response.statusCode} ${statusText}

To complete your request, I need to fetch content from the redirected URL. Please use WebFetch again with these parameters:
- url: "${response.redirectUrl}"
- prompt: "${prompt}"`

      const output: Output = {
        bytes: Buffer.byteLength(message),
        code: response.statusCode,
        codeText: statusText,
        finalUrl: response.originalUrl,
        redirectChain: response.redirectChain,
        redirectUrl: response.redirectUrl,
        requestedUrl: url,
        result: message,
        durationMs: Date.now() - start,
        url,
      }

      return {
        data: output,
      }
    }

    const {
      content,
      bytes,
      code,
      codeText,
      contentType,
      finalUrl,
      persistedPath,
      persistedSize,
      redirectChain,
    } = response as FetchedContent