get method

@override Resource get(Link link)

Returns the Resource at the given link's HREF.

A Resource is always returned, since for some cases we can't know if it exists before actually fetching it, such as HTTP. Therefore, errors are handled at the Resource level.

Implementation

@override
Resource get(Link link) {
  String linkHref = link.href.addPrefix("/");
  for (MapEntry<String, FileSystemEntity> entry in paths.entries) {
    String itemHref = entry.key.addPrefix("/");
    FileSystemEntity itemFile = entry.value;
    if (linkHref.startsWith(itemHref)) {
      String path = p.join(
          itemFile.path, linkHref.removePrefix(itemHref).removePrefix("/"));
      File resourceFile = File(path);
      // Make sure that the requested resource is [path] or one of its descendant.
      if (resourceFile.canonicalPath.startsWith(itemFile.canonicalPath)) {
        Resource resource = FileResource(link, resourceFile);
        _openedResources.add(resource);
        return resource;
      }
    }
  }
  return FailureResource(link, ResourceException.notFound);
}