public _PrivilegedExceptionAction_98(ImageServlet.GetImageParams parsedParams, FSImage
nnImage, NameNodeMetrics metrics, HttpServletResponse response, Configuration conf
)
{
this.parsedParams = parsedParams;
this.nnImage = nnImage;
this.metrics = metrics;
this.response = response;
this.conf = conf;
}
/// <exception cref="Javax.Servlet.ServletException"/>
/// <exception cref="System.IO.IOException"/>
protected override void DoGet(HttpServletRequest request, HttpServletResponse response
)
{
try
{
ServletContext context = GetServletContext();
FSImage nnImage = NameNodeHttpServer.GetFsImageFromContext(context);
ImageServlet.GetImageParams parsedParams = new ImageServlet.GetImageParams(request
, response);
Configuration conf = (Configuration)context.GetAttribute(JspHelper.CurrentConf);
NameNodeMetrics metrics = NameNode.GetNameNodeMetrics();
ValidateRequest(context, conf, request, response, nnImage, parsedParams.GetStorageInfoString
());
UserGroupInformation.GetCurrentUser().DoAs(new _PrivilegedExceptionAction_98(parsedParams
, nnImage, metrics, response, conf));
}
catch (Exception t)
{
// Metrics non-null only when used inside name node
// Metrics non-null only when used inside name node
// Potential race where the file was deleted while we were in the
// process of setting headers!
// It's possible the file could be deleted after this point, but
// we've already opened the 'fis' stream.
// It's also possible length could change, but this would be
// detected by the client side as an inaccurate length header.
// send file
string errMsg = "GetImage failed. " + StringUtils.StringifyException(t);
response.SendError(HttpServletResponse.ScGone, errMsg);
throw new IOException(errMsg);
}
finally
{
response.GetOutputStream().Close();
}
}
