http://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 10.2.7 206 Partial Content The server has fulfilled the partial GET request for the resource. The request MUST have included a Range header field (section 14.35) indicating the desired range, and MAY have included an If-Range header field (section 14.27) to make the request conditional. 서버측은 리소스의 부분적인 GET 요청에 대해 수행되어져야 한다. 요청은 반드시 바라는 범위를 나타..