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| const ErrorStackParser = require('error-stack-parser') | |
| const Slack = require('slack-node') | |
| const config = require('../config') | |
| const packageJson = require('../../package.json') | |
| const slack = new Slack() | |
| slack.setWebhook(config.slackHookUrl) | |
| module.exports = (err, req, res, next) => { | |
| // I don't want to send notifications for catched errors | |
| // such as HTTP 400, 401, 404 errors. These errors | |
| // created with npm http-errors have a `statusCode` attribute. | |
| if (err.statusCode) return next(err) | |
| // I don't want to raise errors on slack when I am | |
| // working on my local environment | |
| if (!config.slackHookUrl) return next(err) | |
| // This is optionnal but convenient to get a | |
| // github link to the code line that raised the error | |
| const sourceLink = getSourceLink(err) | |
| slack.webhook({ | |
| channel: config.errorChannel, | |
| username: 'lalibot', | |
| attachments: [ | |
| { | |
| fallback: 'An uncaught error occured', | |
| color: '#f67258', | |
| title: 'An uncaught error occured on the Express API', | |
| text: err.message + (sourceLink ? ` ${sourceLink}` : '') | |
| } | |
| ] | |
| }, (err) => { | |
| // an error occurred when sending an error 🙄 | |
| logger.error(err.message) | |
| }) | |
| return next(err) | |
| } | |
| const getSourceLink = (error) => { | |
| if (!packageJson.repository || !packageJson.repository.url) return null | |
| const branch = process.env.NODE_ENV === 'production' ? 'master' : 'staging' | |
| const stack = ErrorStackParser.parse(error) | |
| if (Array.isArray(stack)) { | |
| // I can provide a link to source code only if it | |
| // comes from our code. Not from node modules. | |
| const stackItemsFromSrc = stack.filter((item) => item.fileName.match(/(src\/.*)$/)) | |
| if (stackItemsFromSrc.length > 0) { | |
| const match = stackItemsFromSrc[0].fileName.match(/(src\/.*)$/) | |
| if (match) { | |
| return `<${packageJson.repository.url}/blob/${branch}/${match[1]}#L${stack[0].lineNumber}|See on Github>` | |
| } | |
| } | |
| } | |
| return null | |
| } |
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