expectPut(credentials)
        if (server.supportsHash(HttpServer.SupportedHash.SHA1)) {
            sha1.expectPut(credentials)
        }
        if (extraChecksums) {
            if (server.supportsHash(HttpServer.SupportedHash.SHA256)) {
                sha256.expectPut(credentials)
            }
            if (server.supportsHash(HttpServer.SupportedHash.SHA512)) {
                sha512.expectPut(credentials)

    boolean sendLastModified = true
    boolean sendSha1Header = false

    // by default, all hashes are supported
    Set<SupportedHash> supportedHashes = EnumSet.allOf(SupportedHash)

    boolean supportsHash(SupportedHash toCheck) {
        return supportedHashes.contains(toCheck)
    }

    void beforeHandle(org.gradle.api.Action<HttpServletRequest> r) {
        beforeHandle = r
    }