Csv to JSON converter with error handling and Slack notifications

Who this template is for

This template is for developers or teams who need to convert CSV data into JSON format through an API endpoint, with support for both file uploads and raw CSV text input.

Use case

Converting CSV files or raw CSV text data into JSON format via a webhook endpoint, with error handling and notifications. This is particularly useful when you need to transform CSV data into JSON as part of a larger automation or integration process.

How this workflow works

1. Receives POST requests through a webhook endpoint at

/tool/csv-to-json

2. Uses a Switch node to handle different input types:
   • File uploads (binary data)
   • Plain text CSV data
   • JSON format data
3. Processes the CSV data:
   • For files: Uses the Extract From File node
   • For raw text: Converts the text to CSV using a custom Code node that handles both comma and semicolon delimiters
4. Aggregates the processed data and returns:
   • Success response (200): Converted JSON data
   • Error response (500): Error message with details
5. In case of errors, sends notifications to a Slack error channel with execution details and a link to debug

Set up steps

1. Configure the webhook endpoint by deploying the workflow
2. Set up Slack integration for error notifications:
   • Update the Slack channel ID (currently set to "C0832GBAEN4")
   • Configure OAuth2 authentication for Slack
3. Test the endpoint using either:

   • CURL for file uploads:

     bash
     Copy
     curl -X POST "https://yoururl.com/webhook-test/tool/csv-to-json" \
          -H "Content-Type: text/csv" \
          --data-binary @path/to/your/file.csv
     

   • Or send raw CSV data as text/plain content type