File.read() fails with binary file

Question

this is annoying me as I thought this would be trivial (and according to the docs, completely possible).

I am opening a tiff file, and I am trying to read all the data. I set encoding to binary after opening.heres my simple code:

var file = File.openDialog('select file');
file.open("r");
file.encoding = "binary";
alert(file.read());

I am using this file:

https://area51.d4creative.com/cgi-bin/fastLink.cgi?linkID=922&fileID=5162&keyCode=9tlpQ3dS

my alert box says: MM if I open that file in a text editor, there is more data after MM. What is the problem? Can extendscript really not properly read binary data despite the manuals claim that it can?

Mike Cardeiro

Dan Ebberts · Accepted Answer

If I do it this way:{ var myFile = File.openDialog("Select binary file."); myFile.open("r"); myFile.encoding = "BINARY"; var myChar, myByte; var i = 0; s = ""; while (! myFile.eof){ myChar = myFile.readch(); myByte = myChar.charCodeAt(0).toString(16); if (myByte.length < 2) myByte = "0" + myByte; s += myByte + " "; if (i%16 == 15) s += "\r"; i++; } myFile.close(); $.writeln(s);}This is what I get:4d 4d 00 2a 00 00 00 08 00 0c 00 fe 00 04 00 00 00 01 00 00 00 00 01 00 00 03 00 00 00 01 00 04 00 00 01 01 00 03 00 00 00 01 00 04 00 00 01 02 00 03 00 00 00 03 00 00 00 9e 01 03 00 03 00 00 00 01 00 01 00 00 01 06 00 03 00 00 00 01 00 02 00 00 01 11 00 04 00 00 00 01 00 00 00 bc 01 15 00 03 00 00 00 01 00 03 00 00 01 16 00 03 00 00 00 01 00 04 00 00 01 17 00 04 00 00 00 01 00 00 00 30 01 1c 00 03 00 00 00 01 00 01 00 00 86 49 00 01 00 00 00 18 00 00 00 a4 00 00 00 00 00 08 00 08 00 08 38 42 49 4d 04 28 00 00 00 00 00 0c 00 00 00 01 3f f0 00 00 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffDan

mike cardeiro · Answer

even more puzzling (and infuriating), if I modify the code to this:

var file = File.openDialog('select file');
file.open("r");
file.encoding = "binary";
for(x=0;x<file.length;++x){
file.seek(x,0);
alert(file.readch());
}

it works as expected, I get an alert box for every character in the file; but the moment I try to save it like so

var file = File.openDialog('select file');
file.open("r");
file.encoding = "binary";
var t = new Array;
for(x=0;x<file.length;++x){
file.seek(x,0);
alert(file.readch());
}
alert(t);

i get M,M, in the alert box. what the F*CK is going on with this...this should be trivial.

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