Log errors and messages to Rollbar from a Cloudflare Worker

cloudflare-worker-rollbar.ts

import ErrorStackParser from 'error-stack-parser'

const ROLLBAR_ACCESS_TOKEN = '[ACCESS TOKEN]'
var rollbarUrl = `https://api.rollbar.com/api/1/item/`

// https://github.com/rollbar/rollbar.js/blob/master/src/errorParser.js
function Frame(stackFrame: ErrorStackParser.StackFrame) {
  var data:any = {};

  // data._stackFrame = stackFrame;

  data.filename = stackFrame.fileName;
  data.lineno = stackFrame.lineNumber;
  data.colno = stackFrame.columnNumber;
  data.method = stackFrame.functionName;
  data.args = stackFrame.args;

  return data;
}

export const rollbarError = async (error: Error, description?: string|null) => {
  const stack = ErrorStackParser.parse(error)
  const rollbarBody = {
    "access_token": ROLLBAR_ACCESS_TOKEN,
    "data": {
      "environment": "development",
      "body": {
        "trace": {
          "frames": stack.map( stackFrame => Frame(stackFrame) ),
          "exception": {
            "class": error.name,
            "message": error.message
          }
        }
      }
    }
  }
  if (description) {
    Object.assign(rollbarBody.data.body.trace.exception, {description: description})
  }
  const rollbarRequest = new Request(rollbarUrl, {
    method: 'POST',
    body: JSON.stringify(rollbarBody)
  })
  const rollbarResponse = await fetch(rollbarRequest)
  return rollbarResponse
}

export const rollbarMessage = async (message: string, attributes: {}|null) => {
  const rollbarBody = {
    "access_token": ROLLBAR_ACCESS_TOKEN,
    "data": {
      "environment": "development",
      "body": {
        "message": {
          "body": message,
        }
      }
    }
  }
  if (attributes) {
    Object.assign(rollbarBody.data.body.message, attributes)
  }

  const rollbarRequest = new Request(rollbarUrl, {
    method: 'POST',
    body: JSON.stringify(rollbarBody)
  })
  const rollbarResponse = await fetch(rollbarRequest)
  return rollbarResponse
}