Inbound Webhook Code Snippets

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Inbound Webhook Code Snippets

You can trigger SIGNL4 alerts by using the inbound webhook. This is an easy and reliable way to integrate with your backend systems. In order to do so we have listed some code samples on how to send webhook requests to SIGNL4. You need to replace by your SIGNL4 team secret and you can add additional parameters to the alert data according to your needs.
You can find more information about how to setup the webhooks in our getting-started documentation.

cURL
Bash Script
PowerShell
Node.js
Python
C#
Go
PHP
Ruby
Flutter / Dart

You can also find these code snippets on GitHub: https://github.com/signl4/code-snippets

cURL

curl -X POST 'https://connect.signl4.com/webhook/{team-secret}' -H 'Content-Type:application/json' -d '{"Title":"Test Alert","Text":"Hello world."}'

Bash Script


# Send SIGNL4 alert from Bash

# SIGNL4 team secret
team_secret="team-secret"

# Alert data
data()
{
  cat <<EOF
{
  "Title": "Alert",
  "Message": "SIGNL4 alert from Bash Shell"
}
EOF
}

curl -d "$(data)" -H "Content-Type: application/json" "https://connect.signl4.com/webhook/$team_secret"

PowerShell


# Send SIGNL4 alert from PowerShell

# SIGNL4 team secret
$team_secret = ""
# Alert data
$data = @{
 "Title"="Alert"
 "Message"="SIGNL4 alert from PowerShell"
} | ConvertTo-Json -Depth 4

Invoke-RestMethod "https://connect.signl4.com/webhook/$team_secret" -Method POST -ContentType "application/json" -Body $data

Node.js


// Send SIGNL4 alert from Node.js

// Your SIGNL4 team secret
const teamSecret = 'team-secret'

const https = require('https')

// Alert data
const data = JSON.stringify({
    'Title': 'Alert',
    'Message': 'SIGNL4 alert from Node.js'
})

// SIGNL4 webhook URL
const options = {
  hostname: 'connect.signl4.com',
  port: 443,
  path: '/webhook/' + teamSecret,
  method: 'POST',
  headers: {
    'Content-Type': 'application/json',
    'Content-Length': data.length
  }
}

const req = https.request(options, res => {
  console.log(`statusCode: ${res.statusCode}`)

  if (res.statusCode != 201) {
      // Error
      console.error('Error: ' + res.statusCode)
      return
  }

  // Success
  res.on('data', d => {
    process.stdout.write(d)
  })
})

// Error
req.on('error', error => {
  console.error(error)
})

req.write(data)
req.end()

Python


# Send SIGNL4 alert from Python

import requests

# Your SIGNL4 team secret
teamSecret = 'team-secret'

# SIGNL4 webhook URL
webhook_url = 'https://connect.signl4.com/webhook/' + teamSecret

# Alert data
alert_data = {
    'Title': 'Alert',
    'Message': 'SIGNL4 alert from Python'}

result = requests.post(url = webhook_url, json = alert_data)

if result.status_code == 201:
    # Success
    print(result.text)
else:
    # Error
    print('Error: ' + str(result.status_code))

C#


using System;
using System.IO;
using System.Net;
using System.Text;

// Send SIGNL4 alert from C#

// Your SIGNL4 team secret
string teamSecret = "team-secret";

// Alert data
string json = @"{  
'Title': 'Alert',  
'Message': 'SIGNL4 alert from C#'  
}"; 

sendSIGNL4Alert(teamSecret, json);

public static void sendSIGNL4Alert(string strTeamSecret, string strData)
{
    string url = "https://connect.signl4.com/webhook/" + strTeamSecret;

    try
    {
        HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);
        request.Method = "POST";

        byte[] byteArray = Encoding.UTF8.GetBytes(strData);

        request.ContentType = "application/json";
        request.ContentLength = byteArray.Length;

        // Send the request
        Stream dataStream = request.GetRequestStream();
        dataStream.Write(byteArray, 0, byteArray.Length);
        dataStream.Close();

        // Get the response.
        HttpWebResponse response = (HttpWebResponse)request.GetResponse();
        Console.WriteLine(((HttpWebResponse)response).StatusDescription);

        using (dataStream = response.GetResponseStream())
        {
            StreamReader reader = new StreamReader(dataStream);
            string responseFromServer = reader.ReadToEnd();

            Console.WriteLine("Status Code: {0}", (int)response.StatusCode);
            Console.WriteLine(responseFromServer);

            if ((int)response.StatusCode == 201) {
                // Success
                Console.WriteLine("Success");
            }
            else {
                // Error
                Console.WriteLine("Error");
            }
        }

        response.Close();
    }
    catch (Exception e)
    {
        // Error
        Console.WriteLine("Error: " + e.ToString());
    }

}

Go

package main

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"net/http"
)

// Send SIGNL4 alert from Go

func main() {
	// Your SIGNL4 team secret
	teamSecret := "team-secret"
	url := "https://connect.signl4.com/webhook/" + teamSecret

	// Alert data
	var jsonStr = []byte(`{
		"Title":"Alert",
		"Message": "SIGNL4 alert from Go"}`)
	req, err := http.NewRequest("POST", url, bytes.NewBuffer(jsonStr))
	req.Header.Set("Content-Type", "application/json")

	client := &http.Client{}
	resp, err := client.Do(req)
	if err != nil {
		// Error
		fmt.Println("Error")
		panic(err)
	}
	defer resp.Body.Close()

	if resp.StatusCode == 201 {
		// Success
		fmt.Println("Success")
	} else {
		// Error
		fmt.Println("Error: " + resp.Status)
	}

	body, _ := ioutil.ReadAll(resp.Body)
	fmt.Println("response Body:", string(body))
}

PHP


<?php

// Send SIGNL4 alert from PHP

// Your SIGNL4 team secret
$teamSecret = 'team-secret';

$url = 'https://connect.signl4.com/webhook/' . $teamSecret;
 
// User cURL
$ch = curl_init($url);
 
// Alert data
$data = array(
    'Title' => 'Alert',
    'Message' => 'SIGNL4 alert from PHP'
);

$jsonData = json_encode($data);

// Send the request
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $jsonData);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // No echo for curl_errno
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: application/json')); 
 
//Execute the request
$result = curl_exec($ch);

if (!curl_errno($ch)) {
	$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
	if ($http_code == 201) {
		// Success
		echo $result . 'rn';
	}
	else {
		// Error
		echo 'Error: ' . $http_code . 'rn';
	}
}
else {
	// Error
	echo 'Errorrn';
}

curl_close($ch);

?>

Ruby



require 'net/http'
require 'uri'
require 'json'

# Send SIGNL4 alert from Ruby

# SIGNL4 team secret
team_secret = "team-secret"

# Alert data
alert_data = { "Title" => "Alert", "Message" => "SIGNL4 alert from Ruby" }.to_json

url = "https://connect.signl4.com/webhook/" + team_secret

res = Net::HTTP.post URI(url),
    alert_data,
    "Content-Type" => "application/json"

# Status
puts res.code
puts res.message

# Body
puts res.body

case res
when Net::HTTPSuccess, Net::HTTPRedirection
  if res.code == "201"
    # Success
    puts "Success"
  else
    # Error
    puts "Error1"
  end
else
  # Error
  puts "Error"
end

Flutter / Dart



  import 'dart:convert';
  import 'package:http/http.dart' as http;
  
  void main() {
    print('Sending SIGNL4 alert ...');
  
    sendRequest('SIGNL4 Alert from Dart.');
  }
  
  // Send alert
  Future sendRequest(String title) async {
    // SIGNL4 team secret
    String teamSecret = 'signl4-team-secret';
  
    final response = await http.post(
      Uri.parse('https://connect.signl4.com/webhook/' + teamSecret),
      headers: {
        'Content-Type': 'application/json',
      },
      body: jsonEncode({
        'title': title,
      }),
    );
  
    if (response.statusCode == 201) {
      // If the server did return a 201 CREATED response,
      // then parse the JSON.
  
      print(jsonDecode(response.body)['eventId']);
    } else {
      // If the server did not return a 201 CREATED response,
      // then throw an exception.
  
      print('Error: ${response.statusCode}');
  
      throw Exception('Failed to send alert.');
    }
  }