base64 encode image host url or server file path

Question

When I encode image data to a base64 string I use the server file path to get the image data with fs.readFile() . I have question: does this mean other people can decode the base64 string then get the server path from the encoded data as below?

...
fs.readFile(destinationFilePath, function(error, data){
  fulfill(data.toString('base64'));
});

I don't want to leak my server path to so I also tried encode the host url like below code, I'm not sure this correct way to use base64? and I don't get any error but also I got no response - did I miss something?

var base64EncodeData = function(destinationFilePath) {
  return new Promise(function (fulfill, reject){
      var request = require('request').defaults({ encoding: null });
      request.get(destinationFilePath, function (error, response, body) {
        if (!error && response.statusCode == 200) {
          data = "data:" + response.headers["content-type"] + ";base64," + new Buffer(body).toString('base64');
          console.log(data);
          fulfill(data);
        }
      });
  });
};

Answer 1

No you don't leak your server path by base64 encoding images. The base64 you are generating only includes a base64 representation of the binary image data. Indeed by base64 encoding them you remove any use of a path when you display them within a HTML page for example:

<img alt="base64 image" src="data:image/png;base64,isdRw0KGgot5AAANdSsDIA..." />

The src attribute contains a flag that data is being provided data: the file mimetype image/png; the encoding base64, and the encoded image data isdRw0KGgot5AAANdSsDIA... .