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main.go
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main.go
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package main
import (
"context"
a "github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/xgodev/boost/config"
"github.com/xgodev/boost/factory/contrib/aws/aws-sdk-go-v2/v1"
ilog "github.com/xgodev/boost/factory/local/wrapper/log"
"github.com/xgodev/boost/wrapper/log"
)
const Bucket = "aws.s3.bucket"
func init() {
config.Add(Bucket, "example", "s3 example bucket")
}
func main() {
config.Load()
// create background context
ctx := context.Background()
ilog.New()
// get logrus instance from context
logger := log.FromContext(ctx)
// create default aws config
awsConfig, err := aws.NewConfig(ctx)
if err != nil {
logger.Fatalf(err.Error())
}
// create s3 client
s3Client := s3.NewFromConfig(awsConfig)
// set vars
filename := "examplefile"
bucket := config.String(Bucket)
// prepare s3 request head
input := &s3.HeadObjectInput{
Bucket: a.String(bucket),
Key: a.String(filename),
}
// make a call
head, err := s3Client.HeadObject(ctx, input)
if err != nil {
logger.Fatalf(err.Error())
}
if err != nil {
logger.Fatalf("unable check file %s in s3 bucket %s", filename, bucket)
}
logger = logger.WithFields(
log.Fields{"lastModified": head.LastModified,
"versionId": head.VersionId,
})
logger.Debugf("file %s exists on bucket %s", filename, bucket)
}