HexDumper
M. Gallant 11/10/2000
The ability to create objects from classes in the Java API
can be used to extend the capability of Windows scripts.
Since the MS Java API is resident on any PC with IE4+ installed,
developers can leverage the capability contained therein.
The following script instantiates a Java object which contains
a method:
HexDumper.toHexString(String filepath)
which saves a hexdump of files specified as arguments (or drag/dropped).
To use the Java class, compile the Java source code, and place the
resultant HexDumper.class
class file in the classpath (for example: C:\Winnt\Java\Classes)
hexdumper.vbs
<![CDATA[
'********************************************************************
' File: hexdumper.vbs (WSH for VBscript)
' Author: (c) M. Gallant 11/10/2000
'
' Hexdumper utility.
' Outputs text file "_hex_filename.txt" to current script directory.
' Uses Java class "HexDumper" which must be in classpath.
'********************************************************************
Option Explicit
Dim WshShell, fso, scriptpath, oJfilehexer, oHexfile, outfile, oFiles
DIM hexdata, sourcefile, fileargs, i, j
set WshShell = WScript.CreateObject("WScript.Shell")
set fso = WScript.CreateObject("Scripting.FileSystemObject")
scriptpath = fso.GetParentFolderName(WSCript.ScriptFullName) & "\"
set oJfilehexer = GetObject("java:HexDumper") 'Instantiate Java object via moniker.
Set fileargs = WScript.Arguments
If fileargs.Count<1 Then
WScript.Echo "Drag some files onto the icon"
WScript.Quit
End If
For i = 0 to fileargs.Count -1 'Get all files passed (or drag/dropped).
sourcefile = fileargs(i)
If fso.FileExists(sourcefile) Then ' ensure a file and not a folder
hexdata = oJfilehexer.toHexString(sourcefile) ' string with hex data
outfile = scriptpath & "_hex_" & fso.GetFile(sourcefile).Name & ".txt"
Set oHexFile = fso.OpenTextFile(outfile, 2, True)
oHexFile.write hexdata
oHexFile.close
Set oHexFile = Nothing
WshShell.Run "notepad.exe " & outfile, 1, True
Else
WScript.Echo sourcefile & " is not a file."
End If
Next
]]>
HexDumper.java (Java class)
<![CDATA[
/* File hexdumper for similar to win32 debug.exe utility.
M. Gallant 11/10/2000
*/
import java.io.*;
import java.util.Date;
import java.text.DateFormat;
public final class HexDumper {
static final String nl = java.lang.System.getProperty("line.separator");
public final String toHexString(String filepath){
StringBuffer strbuf = new StringBuffer(1024) ;
int filebytes=0;
try {
String today = DateFormat.getDateTimeInstance(DateFormat.MEDIUM, DateFormat.SHORT).format(new Date());
long flen = (new File(filepath)).length() ;
strbuf.append("-- " + filepath + " [" +flen + " bytes] " + today + " --"+nl+nl) ;
FileInputStream file = new FileInputStream (filepath);
DataInputStream in = new DataInputStream (file);
byte[] b = new byte[in.available ()];
in.readFully (b);
in.close ();
filebytes=b.length ;
if(filebytes==0)
return("File has no bytes") ;
int achar=0;
int counter = 0;
String pad = "0000 " ;
StringBuffer buffdisp = new StringBuffer() ; // default 16 byte buffer for displayable characters.
strbuf.append(pad) ;
for(int i=0; i<filebytes; i++) {
achar = b[i] ;
if(achar<0)
achar+=256;
if(achar>31 && achar<127)
buffdisp.append((char) achar);
else
buffdisp.append(".") ; //placeholder for nondisplayable characters.
if (achar>=16){
strbuf.append(" " + Integer.toHexString(achar).toUpperCase()) ;
}
else {
strbuf.append(" 0" + Integer.toHexString(achar).toUpperCase()) ;
}
if((++counter %16) ==0){ // start new line every 16 bytes and if not at end.
strbuf.append(" " + buffdisp.toString() + nl) ;
buffdisp=new StringBuffer() ; // reset
if(counter%128 ==0)
strbuf.append(nl) ; // group in 128 byte groups
if(counter==16)
pad="00";
else
if(counter==256)
pad="0";
else
if(counter==4096)
pad="";
if(counter<filebytes) // if not at end of file yet, start new line
strbuf.append(pad+Integer.toHexString(counter)+" ") ; // byte counter at start of line.
} // end if ...
} // end for(int i
for(short k=1; k<=(16-(counter%16)); k++) // if only partial line printed..
strbuf.append(" "); // shift final buffdisp to align with other lines.
strbuf.append(" " + buffdisp.toString() + nl) ; //print displayable characters and finish line.
strbuf.append(nl + "---------------------- Read " + counter + " bytes of data ----------------------------" + nl) ;
return(strbuf.toString()) ;
} // end try
catch (Exception e) {
e.printStackTrace() ; // send details to stdio.
return("Problem with reading file \n " + e);
}
}
public static void main(String args[]) { // test class
HexDumper hstr = new HexDumper() ;
String datastring = hstr.toHexString(args[0]);
System.out.println(datastring) ;
}
}
]]>