if (bodyStream != null) {
            throw new CurlException("body method is already called.");
        }
        this.body = body;
        return this;
    }

    public CurlRequest body(final InputStream stream) {
        if (body != null) {
            throw new CurlException("body method is already called.");
        }
        this.bodyStream = stream;
        return this;
    }