tryServe method

Future<bool> tryServe(Request req, Response res)

Attempts to serve a file matching the request path.

Implementation

Future<bool> tryServe(Request req, Response res) async {
  if (req.method != 'GET') return false;

  final String safePath =
      req.path == '/' || req.path == '' ? '/index.html' : req.path;
  final String fullPath = '$directory$safePath';
  final File file = File(fullPath);

  if (!await file.exists()) return false;

  try {
    final mimeType = lookupMimeType(file.path) ?? 'application/octet-stream';
    res.raw.response.headers.contentType = ContentType.parse(mimeType);

    // Add caching headers for better performance
    // Cache for 1 hour by default
    res.raw.response.headers
        .add(HttpHeaders.cacheControlHeader, 'public, max-age=3600');

    // Add Last-Modified header
    final lastModified = await file.lastModified();
    res.raw.response.headers
        .add(HttpHeaders.lastModifiedHeader, HttpDate.format(lastModified));

    // Check If-Modified-Since
    final ifModifiedSince =
        req.raw.headers.value(HttpHeaders.ifModifiedSinceHeader);
    if (ifModifiedSince != null) {
      try {
        final ifModifiedDate = HttpDate.parse(ifModifiedSince);
        if (lastModified.isBefore(ifModifiedDate) ||
            lastModified.isAtSameMomentAs(ifModifiedDate)) {
          res.raw.response.statusCode = HttpStatus.notModified;
          await res.raw.response.close();
          return true;
        }
      } catch (_) {
        // Ignore parsing errors
      }
    }

    await res.raw.response.addStream(file.openRead());
    await res.raw.response.close();
    return true;
  } catch (_) {
    return false;
  }
}