sqs-worker.sh

#!/bin/bash

QUEUE=

echo "starting amazon sqs worker for queue $QUEUE"

while true
do
    MESSAGE=`aws sqs receive-message --wait-time-seconds=1 --visibility-timeout=600 --queue-url=$QUEUE`
    if [ $? -ne 0 ]; then
        echo "aws sqs operation failed, trying again in 5s"
        sleep 5
        continue
    fi

    NUM_MESSAGES=`echo $MESSAGE | jq '.Messages | length'`
    if [ "$NUM_MESSAGES" -eq 0 ]; then
        sleep 10
        continue
    fi

    HANDLE=`echo $MESSAGE  | jq -r '.Messages[0].ReceiptHandle'`
    TOPIC=`echo $MESSAGE | jq -r '.Messages[0].Body | fromjson | .TopicArn'`
    echo "message received on topic $TOPIC"

    # run a process
        
    if [ $? -ne 0 ]; then
        echo "error processing message"
    else
        aws sqs delete-message --queue-url=$QUEUE --receipt-handle=$HANDLE
    fi
done

Requires aws cli client, and http://stedolan.github.io/jq/