Sometime we want to get the Lambda execution’s log stream URL on AWS CloudWatch Logs.

And we can create this URL in your Lambda function.

Code

import { Handler } from 'aws-lambda'
export const handler: Handler = async (event, _context) => {
    const logStreamURL = [
        "https://console.aws.amazon.com/cloudwatch/home?region=",
        process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION,
        "#logsV2:log-groups/log-group/",
        encodeURIComponent(_context.logGroupName),
        '/log-events/',
        encodeURIComponent(_context.logStreamName)
    ].join('')
    return logStreamURL
}

Note

If you using the example code, please keep in mind we have to set an env parameter as similar to Lambda.

The code request to use AWS_REGION or AWS_DEFAULT_REGION parameter.So, if we execute your Lambda function outside AWS Lambda, we need to set it manually. Or, if these props are undefined, the URL should be null.

import { Context } from 'aws-lambda'

const getLogStreamURL = (context?: Context): string | null => {
    const region = process.env.AWS_REGION || process.env.AWS_DEFAULT_REGION
    if (!region || !context) return null

    const logStreamURL = [
        "https://console.aws.amazon.com/cloudwatch/home?region=",
        region,
        "#logsV2:log-groups/log-group/",
        encodeURIComponent(context.logGroupName),
        '/log-events/',
        encodeURIComponent(context.logStreamName)
    ].join('')
    return logStreamURL
}