plywood-mysql-requester/build/mySqlRequester.js

MySQL requester for Plywood (within node)

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var mysql = require("mysql");
var plywood_base_api_1 = require("plywood-base-api");
var readable_stream_1 = require("readable-stream");
function mySqlRequesterFactory(parameters) {
    var locator = parameters.locator;
    if (!locator) {
        var host = parameters.host;
        if (!host)
            throw new Error("must have a `host` or a `locator`");
        locator = plywood_base_api_1.basicLocator(host, 3306);
    }
    var user = parameters.user;
    var password = parameters.password;
    var database = parameters.database;
    return function (request) {
        var query = request.query;
        var connection = null;
        var stream = new readable_stream_1.Readable({
            objectMode: true,
            read: function () {
                connection && connection.resume();
            }
        });
        locator()
            .then(function (location) {
            connection = mysql.createConnection({
                host: location.hostname,
                port: location.port || 3306,
                user: user,
                password: password,
                database: database,
                charset: 'UTF8_BIN',
                timezone: '+00:00'
            });
            connection.connect();
            var q = connection.query(query);
            q.on('result', function (row) {
                if (!stream.push(row))
                    connection.pause();
            });
            q.on('error', function (err) {
                stream.emit('error', err);
            });
            q.on('end', function () {
                stream.push(null);
            });
            connection.end();
        })
            .catch(function (err) {
            stream.emit('error', err);
        });
        return stream;
    };
}
exports.mySqlRequesterFactory = mySqlRequesterFactory;