Open Cloudwatch Insights

Open-Cloudwatch-Insights.js

;(() => {
  const url = "https://console.aws.amazon.com/cloudwatch/home?region=us-east-1#logs-insights:queryDetail=~(end~0~start~-900~timeType~'RELATIVE~unit~'seconds~editorString~'fields*20*20*40timestamp*2c*20*40message*0a*20*7c*20limit*2020~isLiveTail~false~queryId~'CW_LOG_NAME~source~'CW_LOG_NAME)";
  const regionFromUrl = /.*\?region=(.+?)#.*/;
  const logGroupFromCloudwatch = /.*group=([^;]*?)(;|$)/;
  const logGroupFromLambda = /.*functions\/([^?]*)/;
  const logGroupToken = /CW_LOG_NAME/g;

  let logGroup = null;
  
  const regionResult     = regionFromUrl.exec(window.location.href);
  const cloudwatchResult = logGroupFromCloudwatch.exec(window.location.href);
  const lambdaResult     = logGroupFromLambda.exec(window.location.href);
  
  if (cloudwatchResult) {
    logGroup = cloudwatchResult[1];
  }
  else if (lambdaResult) {
    let lambdaLogName = lambdaResult[1];
    if (!confirm("Click 'OK' if this is a normal lambda. If this is a Lambda@Edge, click 'Cancel'")) {
      lambdaLogName = `${regionResult[1]}.${lambdaResult[1]}`;
    }
    
    logGroup = `/aws/lambda/${lambdaLogName}`;
  }
  
  if (!logGroup) {
    alert("Could not find log group information on this page. Are you on a Lambda or Cloudwatch group/stream page?");
    return;
  }
  
  window.open(url.replace(logGroupToken, logGroup), "_blank");
})();