Node.js, Express, and SQLite to wrap a REST API around an SQL database

nodejs_db_with_restapi.js

var sqlite3 = require('sqlite3').verbose();
var db = new sqlite3.Database('data/demodb02');

db.serialize(function() {
    db.run("CREATE TABLE IF NOT EXISTS counts (key TEXT, value INTEGER)");
    db.run("INSERT INTO counts (key, value) VALUES (?, ?)", "counter", 0);
});



var express = require('express');
var restapi = express();

restapi.get('/data', function(req, res){
    db.get("SELECT value FROM counts", function(err, row){
        res.json({ "count" : row.value });
    });
});

restapi.post('/data', function(req, res){
    db.run("UPDATE counts SET value = value + 1 WHERE key = ?", "counter", function(err, row){
        if (err){
            console.err(err);
            res.status(500);
        }
        else {
            res.status(202);
        }
        res.end();
    });
});


restapi.listen(3000);

console.log("Submit GET or POST to http://localhost:3000/data");

@dalelane I get this error

events.js:72
throw er; // Unhandled 'error' event
^
Error: SQLITE_CANTOPEN: unable to open database file

You can try to use 'fs' (file system) to read the file and pass it to sqlite3.

SQLITE_CANTOPEN :

var path = require('path');
var dbPath = path.resolve(__dirname, 'mydb.db')

how i make to get and update all rows ???

how i make to get and update all rows ???

Using db.all can query all rows:
http://www.sqlitetutorial.net/sqlite-nodejs/query/

Using db.run is probably your best bet for any update statements:
http://www.sqlitetutorial.net/sqlite-nodejs/update/