This script can act as a middleman between Sentry's webhook system and Mattermost's Incoming Webhooks

sentry_mattermost_webhook.php

<?php
$json = json_decode(file_get_contents('php://input'), true);

if ($json['action'] !== 'created'){ die('Only create actions are alerted'); }
$error = $json['data']['issue'];

if ($error['project']['id'] == 1){ die('Ignore internal errors.'); }
if (empty($error['shortId'])){ die('No shortId passed'); }

// Set channel and username
$response['username'] = 'Sentry';
$response['response_type'] = 'in_channel';

$attachment = [];
$attachment['fallback'] = 'Error reported by Sentry: ' . $error['id'];
$attachment['author_name'] = strtoupper($error['project']['name']) . ' - ' . $error['shortId'];
$attachment['author_icon'] = 'ICON_HERE';
$attachment['author_link'] = 'PATH_TO_YOUR_ORG_HERE' . $error['id'];
$attachment['text'] = $error['title'] . ' @ ' . $error['culprit'];

$fields = [
        'Function' => $error['metadata']['function'],
        'File' => $error['metadata']['filename']
];

// Generate fields
foreach ($fields as $label => $value){
        $field = [
                'short' => true,
                'title' => $label,
                'value' => $value
        ];
        $attachment['fields'][] = $field;
}

$response['attachments'][] = $attachment;
$response = json_encode($response);

$ch = curl_init('YOUR_MATTERMOST_WEBHOOK');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $response);
curl_setopt( $ch, CURLOPT_HTTPHEADER, array('Content-Type:application/json'));
echo curl_exec($ch);

Hi @pmsudhi - Line 12 needs to remain as in_channel - this is a Mattermost identifier telling it you want the message to be posted 'in a channel'.

When you create your incoming webhook URL within Mattermost, this is where you define the channel for the webhook to post messages into.

Lines 17 and 18 are where you enable a quick hyperlink within the Mattermost message back to your Sentry dashboard. Your org URL might be something like:

https://sentry.example.com/organizations/something/

Hope this helps! My guess is the reason this isn't posting is because of your issue on line 12.

Thanks, @dkmonaghan for the headstart. Unfortunately still not able to make progress. If you can please go through the details below. I suspect, some basic mistake I may be making. When an issue is created in Sentry, if I go and check the integration dashboard I can see 2 entries there. first one return with success while the second one fails with internal error. Appreciate it if you can help me out with this

My Webhook script looks likes as below

• My Script is accessible from outside
• My Mattermost incoming webhook URL is OK and tested by providing same to my GitLab instance and it is able to successfully able to communicate with matter most

My Sentry Integration looks like this

1. Page 1:
   

2. Page 2:
   

3. Page 3:
   

4. Page 4:
   

My Alert Configuration in Sentry is as below

1. Page 1:
   
2. Page 2:
   

If the server is returning a 500 error that means there's a problem with the script. Can you provide log output from your webserver showing PHP error logs?

Thanks @dkmonaghan . php curl was missing in the system hence the issue. this is resolved now. Thanks once again for the nice neat solution for Sentry - Mattermost integration

@dkmonaghan Thanks for the idea and the inspiration! Based on this, I created a Sentry - Google Chat webhook connection: https://gist.github.com/Benjaminhu/90471b8f4fc51305a8212223996c4994