Are there JavaScript bindings for MySQL?

Question

I want to access a MySQL database directly from JavaScript code in an HTML page in Firefox.

Does such a library exist?

To be very clear, CGI+Ajax wil

Answer 1

I can't give you complete answer, but here are the general idea how you can do it with just MySQL + Internet Explorer + JavaScript (untested):

In JavaScript you can call a Windows application by using

var myshell = new ActiveXObject( "WScript.shell" );
myshell.run( program names );

So the idea is to call mysql.exe with the SQL statements stored in an SQL file, then capture and parse the output:

mysql.exe -h localhost -u root dbo < script.sql > output.txt

This idea doesn't come without challenges:

• you need to modify the SQL file before calling mysql.exe
• you need to open and parse the output file

As I mentioned above I haven't tested anything, so this whole idea may not even work ...

Answer 2

Javascript can access MySQL...but generally only on the server. I've done it with Rhino, a java based javascript interpreter. Just included the MySQL driver, and its available. I imagine you could probably do this with an applet as well.

using Rhino, it would be something like this:

var DATABASE = {

    database: 'blog_development',
    host: 'localhost',
    username: 'dbuser',
    password: 'dbpass'

};

function ArticleModel(properties) {
  for (var p in properties) {
    this[p] = properties[p];
  }
}

ArticleModel.findAll = function() {
    var results = [];

    var jsConnectionObj = new Packages.MysqlConnection();
    c = jsConnectionObj.open(DATABASE.host,
                             DATABASE.database,
                             DATABASE.username,
                             DATABASE.password);

    if (c) {
      var s = c.createStatement();
      s.executeQuery("SELECT * FROM articles;");
      var rs = s.getResultSet();
      while (rs.next()) {
          results.push(new ArticleModel({
            id: rs.getInt("id"),
            title: rs.getString("title"),
            body: rs.getString("body")
          }));
      }
      rs.close();
      c.close();  
      return results;
    }

    throw new Error('could not connect to database');      
};

Answer 3

Surely if javascript can make a call to a server it can make a call to the local ip address (192.168.x.x) and it can be handled using a program that listens on a specific port? All the program would have to do then is interact with the database, find the information and pass it back to the javascript?