lambda-context-cloudwatch-logs-deep-link.js

import { URL } from "url"
/** Construct a deep link to the CloudWatch Logs console given a Lambda execution context and start time */
const cloudwatchUrl = context => {
  const path = "cloudwatch/home"
  const url = new URL(path, "https://console.aws.amazon.com/")
  let region
  if (typeof context.invokedFunctionArn === "string") {
    const [, , , arnRegion, accountId, , functionName] = context.invokedFunctionArn.split(":")
    region = arnRegion
  } else {
    region = "us-east-1"
  }
  url.searchParams.set("region", region)
  url.hash =
    "logEventViewer:" +
    querystring.stringify(
      {
        group: context.logGroupName,
        stream: context.logStreamName,
        filter: `"${context.awsRequestId}"`,
        start: new Date().toISOString(),
      },
      ";",
      "=",
    )
  return url.toString()
}