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lambda.go
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lambda.go
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package main
import (
"log"
"os"
"strconv"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/ssm"
"github.com/eawsy/aws-lambda-go-core/service/lambda/runtime"
)
// Handle is entrypoint for AWS lambda execution
func Handle(evt interface{}, ctx *runtime.Context) (string, error) {
// disable timestamps for logging, as done by cloudwatch
log.SetFlags(0)
// get runtime configuration from parameter store
ssmGet(os.Getenv("SSM_SOURCE"))
// finally execute CLI-like
run()
return "Success", nil
}
func ssmGet(prefix string) {
sess := session.Must(session.NewSession())
sessConfig := &aws.Config{}
svc := ssm.New(sess, sessConfig)
params := &ssm.GetParametersInput{
Names: []*string{
aws.String(prefix + "_CSS_ARGS"),
aws.String(prefix + "_AWS_SECGROUP_ID"),
aws.String(prefix + "_AKAMAI_SSID"),
aws.String(prefix + "_AKAMAI_EDGEGRID_HOST"),
aws.String(prefix + "_AKAMAI_EDGEGRID_CLIENT_TOKEN"),
aws.String(prefix + "_AKAMAI_EDGEGRID_CLIENT_SECRET"),
aws.String(prefix + "_AKAMAI_EDGEGRID_ACCESS_TOKEN"),
},
WithDecryption: aws.Bool(true),
}
resp, err := svc.GetParameters(params)
exitIfError("GetParameters", err)
for _, p := range resp.Parameters {
realName := (*p.Name)[len(prefix)+1:]
switch realName {
case "CSS_ARGS":
parseLambdaFlags(*p.Value)
case "AWS_SECGROUP_ID":
mySecGroup = *p.Value
case "AKAMAI_SSID":
_ssid, _ := strconv.Atoi(*p.Value)
mySSID = _ssid
default:
os.Setenv(realName, *p.Value)
}
}
}
func parseLambdaFlags(args string) {
if strings.Contains(args, "-cloudflare") {
useCloudflare = true
}
if strings.Contains(args, "-add-missing") {
addMissing = true
}
if strings.Contains(args, "-delete-obsolete") {
deleteObsolete = true
}
if strings.Contains(args, "-acknowledge") {
acknowledge = true
}
if strings.Contains(args, "-list-ss-ids") {
listSSIDs = true
}
if strings.Contains(args, "-version") {
printVersion = true
}
}