garrytan/gstack · error · Error

Could not extract URL from ${filteredArgs[0]} (${tagName})

Error message

Could not extract URL from ${filteredArgs[0]} (${tagName})

What it means

Error "Could not extract URL from ${filteredArgs[0]} (${tagName})" thrown in garrytan/gstack.

Source

Thrown at browse/src/write-commands.ts:1172

      if (url.startsWith('@')) {
        const resolved = await bm.resolveRef(url);
        if (!('locator' in resolved)) throw new Error(`Expected @ref, got CSS selector: ${url}`);
        const locator = resolved.locator;
        const tagName = await locator.evaluate(el => el.tagName.toLowerCase());
        if (tagName === 'img') {
          url = await locator.evaluate(el => {
            const img = el as HTMLImageElement;
            return img.currentSrc || img.src || img.getAttribute('data-src') || '';
          });
        } else if (tagName === 'video') {
          url = await locator.evaluate(el => (el as HTMLVideoElement).currentSrc || (el as HTMLVideoElement).src || '');
        } else if (tagName === 'audio') {
          url = await locator.evaluate(el => (el as HTMLAudioElement).currentSrc || (el as HTMLAudioElement).src || '');
        } else {
          // Try src attribute on any element
          url = await locator.evaluate(el => el.getAttribute('src') || '');
        }
        if (!url) throw new Error(`Could not extract URL from ${filteredArgs[0]} (${tagName})`);
      }

      // Check for HLS/DASH
      if (url.includes('.m3u8') || url.includes('.mpd')) {
        throw new Error('This is an HLS/DASH stream. Use yt-dlp or ffmpeg for adaptive stream downloads.');
      }

      // Determine output path and extension
      const page = bm.getPage();
      let contentType = 'application/octet-stream';
      let buffer: Buffer;

      if (url.startsWith('blob:')) {
        // Strategy 3: Blob URL -- in-page fetch + base64
        const dataUrl = await page.evaluate(async (blobUrl) => {
          try {
            const resp = await fetch(blobUrl);
            const blob = await resp.blob();

View on GitHub (pinned to 94993f7401)

When it happens

Trigger: Thrown at browse/src/write-commands.ts:1172 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of garrytan/gstack@94993f7401 (2026-08-12). Data as JSON: /api/errors/1b56580afc03da09. Report an issue: GitHub.