The sample demonstrates how to use Dynamsoft Barcode Reader SDK and Node.js to create Web barcode reader on Windows, Linux and Mac.
Node.js uses an event-driven, non-blocking I/O model that makes it lightweight. Node.js package ecosystem, npm, is the largest ecosystem of open source libraries in the world. Node.js is designed to build scalable network applications as an asynchronous event driven framework. Jan 25, 2017 Learn to install Node.js on macOS with this fast tutorial - get up and running, and on your way to developing real-time, scalable applications with Node.js. Step 1: Download the Node.js.pkg Installer. To verify that Node.js was installed correctly on your Mac, you can run the following command in your terminal: $ node -v If Node.js was.
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Node.js Version
Install node-gyp
Windows
Install DBR for Windows, Visual Studio and Python v2.7.
Linux
Install DBR for Linux.
Mac
Install DBR for Mac and Xcode.
Probably you will get the following error when running node-gyp configure:
Here is the solution from StackOverflow:
Getting Started
Edit binding.gyp. Replace < DBR Installation Directory > with yours.
Configure building environment:
Build project:
Run server:
Visit http://localhost:2016/index.htm
Reference
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In this section you will create three simple Node.js apps. One of them will just connect to the database, the second will perform basic Insert, Update, Delete, and Select, and the third one will make use of Sequelize, one of the most popular Node.js Object-relational mappers, to execute the same operations.
Step 2.1 Create a Node.js app that connects to SQL Server and executes queries
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Create a new project directory and initialize Node dependencies.
Create a database that will be used for the rest of this tutorial by connecting to SQL Server using sqlcmd and executing the following statement.
Now you will create a simple Node.js app that connects to SQL Server.
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Using your favorite editor, create a file named connect.js in the SqlServerSample folder. Copy and paste the below contents into the file.
Run the application.
Using your favorite text editor, create a file called CreateTestData.sql in the SqlServerSample folder. Copy and paste the following the T-SQL code inside it. This will create a schema, table, and insert a few rows.
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Connect to the database using sqlcmd and run the SQL script to create the schema, table, and insert some rows.
Using your favorite text editor, create a new file called crud.js in the SqlServerSample folder. Copy and paste the following code inside it. This will insert, update, delete, and read a few rows.
Run the crud.js app to see the results
Step 2.2 Create a Node.js app that connects to SQL Server using the popular Sequelize ORM
Create the app directory and initialize Node dependencies.
Open your favourite text editor and create the file orm.js in the directory SqlServerSequelizeSample.
Paste the contents below into orm.js
Update the variable for password to use your own password specified in the first module.
Save and close orm.js
Run the orm.js app
Congratulations! You created your first two Node.js apps with SQL Server! Check out the next section to learn about how you can make your Node.js apps faster with SQL Server’s Columnstore feature