invoke lambda many times with different payloads, from a sed-based template

invoke_lambda_many_times.sh

# invoke (synchronously) a lambda with a bunch of different uid payloads
cat << EOF > user.lst
abc123
def345
... more...uids...
EOF

cat << EOF > sns.json
{
    "Records": [
        {
            "Sns": {
                "MessageId": "165545c9-2a5c-472c-8df2-7ff2be2b3b1b",
                "Timestamp": "2021-01-05T07:37:00.000Z",
                "TopicArn": "arn:aws:sns:us-east-1:some-acct-id:some-topic",
                "Message": "{\"event\":\"activity\",\"uid\":\"TEST_USERID\"}"
            }
        }
    ]
}
EOF



for uid in $(cat user.lst); do aws --profile prod lambda invoke --function-name SomeFunctionName --payload $(sed "s/TEST_USERID/$uid/" sns.json | base64) response_$uid.json; done