/
s3client.go
99 lines (86 loc) · 2.27 KB
/
s3client.go
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package handlers
import (
"fmt"
"os"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
)
// AWS sesssion wrapper
type AwsClient struct {
session *session.Session
}
// CreateNewSession creates an aws s3 session
func CreateNewAwsClient() (*AwsClient, error) {
client := new(AwsClient)
var sess *session.Session
var err error
if os.Getenv("AWS_ACCESS_KEY_ID") != "" {
sess, err = session.NewSession(&aws.Config{
Region: aws.String(os.Getenv("AWS_REGION")),
Credentials: credentials.NewStaticCredentials(
os.Getenv("AWS_ACCESS_KEY_ID"), os.Getenv("AWS_SECRET_ACCESS_KEY"), ""),
})
} else {
region := os.Getenv("AWS_REGION")
if region == "" {
region = "us-east-1"
}
sess, err = session.NewSession(&aws.Config{Region: aws.String(region)})
}
if err != nil {
return nil, err
}
client.session = sess
return client, nil
}
// GetS3ObjectOutput gets object output from s3
func GetS3ObjectOutput(client *AwsClient, bucket string, key string) (*s3.GetObjectOutput, error) {
svc := s3.New(client.session)
input := &s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
}
result, err := svc.GetObject(input)
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
case s3.ErrCodeNoSuchKey:
fmt.Println(s3.ErrCodeNoSuchKey, aerr.Error())
default:
fmt.Println(aerr.Error())
}
} else {
// Print the error, cast err to awserr.Error to get the Code and
// Message from an error.
fmt.Println(err.Error())
}
return nil, err
}
return result, nil
}
// GetObjectSize returns object size in bytes
func GetObjectSize(client *AwsClient, bucket string, key string) (*int64, error) {
svc := s3.New(client.session)
input := &s3.HeadObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
}
result, err := svc.HeadObject(input)
if err != nil {
if aerr, ok := err.(awserr.Error); ok {
switch aerr.Code() {
default:
fmt.Println(aerr.Error())
}
} else {
// Print the error, cast err to awserr.Error to get the Code and
// Message from an error.
fmt.Println(err.Error())
}
return nil, err
}
return result.ContentLength, nil
}