Node save filereader base64 svg upload with fs

Question

I try to save images uploaded from the client, my code works nicely with png's and jpg's but not with svg's. What is the best way?

Client side: <input type="file> => fileReader.readAsDataURL => fileReader.result => xhr

Server side:

saveUserImage(userid, file, base64, callback) {
  if(file.type.indexOf('image') != 0)
    return callback(false);

  var fs = require("fs");

  var regEx = new RegExp('^data:' + file.type + ';base64,');
  base64 = base64.replace(regEx, "");

  fs.mkdir('imgs', function() {
    fs.writeFile('imgs/' + userid + "_" + file.name, base64, 'base64', function(err) {
      if(err) return callback(false);
      return callback('imgs/' + userid + "_" + encodeURIComponent(file.name));
    });
  });
}

The saved svg's are wrong encoded I think:

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svg support would be nice, any ideas?

Answer 1

The problem is, that the mime type of svg is image/svg+xml! The plus is not escaped and the regex does not match. I used a simple function to escape and now it works perfekt

function escapeRegExp(str) {
  return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
}