type Exception report
message String index out of range: -1
description The server encountered an internal error that prevented it from fulfilling this request.
exception
java.lang.StringIndexOutOfBoundsException: String index out of range: -1 java.lang.String.charAt(String.java:658) dforum.servlet.download.doPost(download.java:84) dforum.servlet.download.doGet(download.java:38) javax.servlet.http.HttpServlet.service(HttpServlet.java:622) javax.servlet.http.HttpServlet.service(HttpServlet.java:729) org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
note The full stack trace of the root cause is available in the Apache Tomcat/8.0.24 logs.