Convert binary to hex in node.js

Question

I want to ask I want to convert my binary data to hex before I will insert this to my table.

var net  = require('net');

var server = net.createServer(function(socket){

    socket.on('data',function(data){
    var bindata= data.toString('binary');

    //filter(bindata);

    //if no error convert to hex.
    var hexdata = bindata.toString('hex');

    //insert hexdata here.
});

server.listen(3030,'127.0.0.1', function () {
    console.log("server is listenining");
});

but the problem is that the binary data will be inserted.

Amadan · Accepted Answer · 2015-05-12 06:27:11Z

13

parseInt("10101001", 2).toString(16)
// => "a9"

EDIT: I think I misunderstood the question. Your data starts out as Buffer, then you convert it to a string, then you want it as hex? If so, just do data.toString('hex'). If you have already manipulated bindata, then reconstruct into a buffer:

var bindata = data.toString('binary');
// do something with bindata
var hexdata = new Buffer(bindata, 'ascii').toString('hex');

edited May 12, 2015 at 6:27

answered May 12, 2015 at 6:14

Amadan

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8 Comments

Amadan Over a year ago

Why ascii? Because that is what you would get in your original data buffer if someone was sending application/x-octet-stream-compatible content. If they were sending UTC strings, then I assume you wouldn't be messing with hex in the first place.

jemz Over a year ago

can I ask why is it after I converted into image file,the image is not properly converted enventhough I get the complete binary image data.there is stripe lines along the image.

Amadan Over a year ago

With no access to your code or your image file, no idea. diff it. Use vbindiff or bsdiff or similar to find what is actually different.

jemz Over a year ago

I already ask here stackoverflow.com/questions/30272013/… , but no one tries to attempt to help me. I hope you can help me.Thank you in advance.

jemz Over a year ago

I will try to put in pastie all the binary image data that was save in my db.I'll be back

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Pang · Accepted Answer · 2020-08-04 08:54:33Z

0

Try this:

parseInt("1111", 2).toString(16);

Second param in parseInt is radix its represent "111" value to binary and toString(16) convert it to hex.

edited Aug 4, 2020 at 8:54

Pang

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answered Jan 21, 2017 at 19:40

sudam

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1 Comment

Grisha Levit Over a year ago

This appears to be the same as the existing answer.

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