/
main.go
119 lines (86 loc) · 1.95 KB
/
main.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"github.com/jeffail/gabs"
"os"
"strconv"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/sqs"
)
func getMaxMessages() (int, error) {
value := os.Getenv("MAX_MESSAGES")
if "" == value {
return 1, nil
} else {
return strconv.Atoi(value)
}
}
func pollMessage(queueUrl string) {
sqsClient := sqs.New(&aws.Config{Region: aws.String("us-east-1")})
req := &sqs.ReceiveMessageInput{QueueURL: aws.String(queueUrl)}
result, err := sqsClient.ReceiveMessage(req)
if nil != err {
panic(err)
} else {
parsedResponse, err := gabs.ParseJSON([]byte(*result.Messages[0].Body))
if nil != err {
panic(err)
}
var payload string
payload = parsedResponse.Path("Message").Data().(string)
fmt.Println(unpretty(payload))
deleteRequest := &sqs.DeleteMessageInput{QueueURL: aws.String(queueUrl), ReceiptHandle: aws.String(*result.Messages[0].ReceiptHandle)}
_, err = sqsClient.DeleteMessage(deleteRequest)
if nil != err {
panic(err)
}
}
}
func lookupQueueURL(topicSuffix string) (string, error) {
sqsClient := sqs.New(&aws.Config{Region: aws.String("us-east-1")})
req := &sqs.ListQueuesInput{}
result, err := sqsClient.ListQueues(req)
if nil != err {
return "", err
}
for _, q := range result.QueueURLs {
//fmt.Println(*q)
if strings.HasSuffix(*q, topicSuffix) {
return *q, nil
}
}
return "", nil
}
func unpretty(payload string) string {
x := []byte(payload)
var out bytes.Buffer
err := json.Compact(&out, x)
if nil != err {
panic(err)
}
return string(out.Bytes())
}
func main() {
maxMessages, err := getMaxMessages()
if nil != err {
panic(err)
}
queueName, err := lookupQueueURL(os.Args[1])
if nil != err {
panic(err)
} else if "" == queueName {
os.Exit(1) // Queue not found
}
if -1 == maxMessages {
for {
pollMessage(queueName)
}
} else {
for i := 0; i < maxMessages; i++ {
pollMessage(queueName)
}
}
}