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package froala.editor.video;
import java.io.File;
import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.tika.Tika;
/**
* 동영상 스트리밍 전송
* @since 2021. 6. 18.
* @author 임종호
* <PRE>
* -----------------------
* 개정이력
* 2021. 6. 18. 임종호 : 최초작성
* </PRE>
*/
public class StreamingResponse {
public static final int DEFAULT_BUFFER_SIZE = 204800;
private static final long DEFAULT_EXPIRE_TIME = 604800000L;
public Range write(File file, HttpServletRequest request, HttpServletResponse response) throws IOException {
Range range = null;
String fileName = (String) request.getAttribute("originFileNm");
String rangeStr = request.getHeader("range");
if (rangeStr != null) {
if (rangeStr.endsWith("-")) {
rangeStr = rangeStr + (file.length() - 1);
}
int idxm = rangeStr.trim().indexOf("-");
range = new Range(Long.parseLong(rangeStr.substring(6, idxm)), Long.parseLong(rangeStr.substring(idxm + 1)), file.length());
long partSize = 0;
if (range.getStart() > 0) {
range.setPart(true);
}
range.setPartSize(partSize);
} else {
range = new Range(0L, file.length() - 1, file.length());
}
range.setPartSize(range.getEnd() - range.getStart() + 1);
if (range.getEnd() == 0) {
range.setEnd(range.getStart() + DEFAULT_BUFFER_SIZE - 1);
}
if (range.getEnd() > range.getTotal() - 1) {
range.setEnd(range.getTotal() - 1);
}
String eTag = file.getName() + "_" + file.lastModified();
// mime type 지정
Tika tika = new Tika();
String mime = tika.detect(file);
response.setContentType(mime);
response.reset();
response.setStatus(range.isPart() ? HttpServletResponse.SC_PARTIAL_CONTENT : HttpServletResponse.SC_OK);
response.setHeader("Content-Range", "bytes " + range.getStart() + "-" + range.getEnd() + "/" + range.getTotal());
response.setHeader("Accept-Ranges", "bytes");
response.setHeader("Content-Length", "" + range.getPartSize());
response.setBufferSize(DEFAULT_BUFFER_SIZE);
response.setHeader("Content-Disposition", "inline;filename=\"" + fileName + "\"");
response.setHeader("ETag", eTag);
response.setDateHeader("Last-Modified", file.lastModified());
response.setDateHeader("Expires", System.currentTimeMillis() + DEFAULT_EXPIRE_TIME);
return range;
}
}