Resolving the Node.js Connection Error to SQL Server 2019

Описание: Struggling to connect Node.js to SQL Server 2019? Discover how altering your connection options can resolve the `ConnectionError: Failed to connect to localhost:1433` issue.
---
This video is based on the question https://stackoverflow.com/q/72277617/ asked by the user 'RUCK FULES' ( https://stackoverflow.com/u/10897236/ ) and on the answer https://stackoverflow.com/a/72280189/ provided by the user 'RUCK FULES' ( https://stackoverflow.com/u/10897236/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Node error connecting to SQL Server 2019 won't go away

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Resolving the Node.js Connection Error to SQL Server 2019: A Simple Guide

Connecting Node.js to SQL Server can be tricky, especially when you encounter connection errors. One common problem developers face is an SSL-related error message that prevents a successful connection. If you've been wrestling with a ConnectionError such as "Failed to connect to localhost:1433" or similar SSL routines errors, you're not alone. Let's dive into the solution to get you back on track.

The Problem: Understanding the Connection Error

The user facing the issue had written the following code to establish a connection with SQL Server 2019 using the mssql package. However, every attempt resulted in a connection error that was frustratingly persistent. This specific error message relates to SSL protocols, indicating that there might be a mismatch in the encryption settings between Node.js and SQL Server.

Here's an example of the problematic connection settings:

[[See Video to Reveal this Text or Code Snippet]]

The Solution: Modifying Connection Options

After reviewing the issue, the key to troubleshooting this connection failure lies in modifying the encrypt option in your database settings. If you're running into this SSL issue, here's a simple and effective adjustment:

Change the encrypt Option:

Set the encrypt property from true to false in your connection object.

Updated Code Example

Here’s how your dbSettings should look after the modification:

[[See Video to Reveal this Text or Code Snippet]]

Why This Works

When encrypt is set to true, your Node.js application attempts to establish a secure HTTPS connection. If your SQL Server isn’t configured to accept this connection, you’ll run into SSL errors. Setting encrypt to false allows for a standard, unsecured connection, which can often resolve these frustrating SSL mismatches, especially during development or local server setups.

Conclusion: Testing Your Changes

Now, you can retry running your connection function after making this adjustment:

[[See Video to Reveal this Text or Code Snippet]]

Once you do this, you should be able to connect to your SQL Server without a hitch. If problems persist, double-check other settings, such as your SQL Server authentication and whether the server is up and running on the expected port (usually port 1433).

If you continue to face issues, consider checking the compatibility of the Node.js version with your SQL Server and the mssql package version. Happy coding, and may your database connections remain stable and error-free!