static HttpFileBuilder builder(ClassLoader classLoader, String path) {
        requireNonNull(classLoader, "classLoader");
        requireNonNull(path, "path");

        // Strip the leading slash.
        if (path.startsWith("/")) {
            path = path.substring(1);
        }

        // Retrieve the resource URL.
        @Nullable
        final URL url = classLoader.getResource(path);
        if (url == null) {
            // Non-existent resource.
            return new NonExistentHttpFileBuilder();
        }
        return builder(url);
    }
Returns a new {@link HttpFileBuilder} that builds an {@link HttpFile} from the classpath resource
at the specified {@code path} using the specified {@link ClassLoader}.
core/src/main/java/com/linecorp/armeria/server/file/HttpFile.java