Find it on GitHub: /edgee-cloud/slack-message-component

A simple WebAssembly component that sends messages to Slack via webhook URLs. This component accepts HTTP POST requests with a message and forwards it directly to your configured Slack webhook, making it easy to send notifications from your applications to Slack channels.

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Features

  • Simple Message Forwarding: Accepts messages via HTTP POST and sends them to Slack
  • Webhook Integration: Uses Slack incoming webhooks for reliable message delivery
  • Edge Performance: Fast message processing directly at the edge
  • Easy Configuration: Just provide your Slack webhook URL and endpoint path
  • Real-time Notifications: Send instant notifications to your team

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Getting Started

To integrate Slack messaging with your project:

  1. Create a Slack incoming webhook in your Slack workspace
  2. Open the Edgee console and navigate to your project’s Components
  3. Select “Add a component” and choose edgee/slack-message from the list of available edge functions
  4. Configure the following settings:
    • Webhook URL: Your Slack incoming webhook URL
    • Path Configuration: Set the messaging endpoint path (e.g., /slack-message)
  5. Click Save to activate the Slack messaging endpoint

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Usage

Once configured, you can send messages to Slack by making POST requests to your configured endpoint:

// Send a simple message
await fetch('/slack-message', {
  method: 'POST',
  body: JSON.stringify({
    "message": "Hello from the edge!"
  })
});

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Request Format

{
  "message": "Your message text here"
}

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Message Formatting

You can use Slack’s standard message formatting in your messages:

  • *bold text* for bold
  • _italic text_ for italic
  • ~strikethrough~ for strikethrough
  • `code` for inline code
  • \`\`\`code block\`\`\` for code blocks

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Simple Example

// Send a notification about a form submission
await fetch('/slack-message', {
  method: 'POST',
  body: JSON.stringify({
    "message": "📧 New contact form submission from John Doe (john@example.com)"
  })
});

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Use Cases

  1. System Monitoring: Send alerts for system errors or performance issues
  2. Form Submissions: Alert teams about new form submissions or leads
  3. Error Reporting: Send error reports and exceptions to development channels
  4. Automated Notifications: Send automated updates about system events
  5. Simple Team Communication: Quick notifications for various application events

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Error Handling

The component provides basic error handling:

  • 400 Bad Request: Invalid request format or missing message field
  • 401 Unauthorized: Invalid webhook URL
  • 500 Internal Server Error: Slack webhook error

For more details on Slack webhooks, refer to the official Slack webhook documentation.