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s3.go
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s3.go
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package s3
import (
"bytes"
"context"
"encoding/base64"
"io/ioutil"
"path/filepath"
"strconv"
"text/template"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/latolukasz/beeorm"
"github.com/coretrix/hitrix/pkg/entity"
)
type AmazonS3 struct {
client *s3.S3
ctx context.Context
environment string
bucketsMapping map[string]uint64
bucketsConfigDefinitions map[string]map[string]string
bucketsPublicUrls map[string]map[string]string
}
func NewAmazonS3(endpoint string,
accessKeyID string,
secretAccessKey string,
allowedBuckets map[string]uint64,
bucketsConfigDefinitions map[string]map[string]string,
bucketsPublicURLConfigMap map[string]map[string]string,
region string,
disableSSL bool,
environment string) *AmazonS3 {
s3Config := &aws.Config{
Credentials: credentials.NewStaticCredentials(accessKeyID, secretAccessKey, ""),
Endpoint: aws.String(endpoint),
S3ForcePathStyle: aws.Bool(true),
Region: aws.String(region),
DisableSSL: aws.Bool(disableSSL),
}
newSession, _ := session.NewSession(s3Config)
s3Client := s3.New(newSession)
return &AmazonS3{
client: s3Client,
ctx: context.Background(),
bucketsMapping: allowedBuckets,
bucketsConfigDefinitions: bucketsConfigDefinitions,
environment: environment,
bucketsPublicUrls: bucketsPublicURLConfigMap,
}
}
func (amazonS3 *AmazonS3) getCounter(ormService *beeorm.Engine, bucket string) uint64 {
amazonS3.checkBucket(bucket)
bucketID, has := amazonS3.bucketsMapping[bucket]
if !has {
panic("s3 bucket [" + bucket + "] id not found")
}
amazonS3BucketCounterEntity := &entity.OSSBucketCounterEntity{}
locker := ormService.GetRedis().GetLocker()
lock, hasLock := locker.Obtain("locker_amazon_s3_counters_bucket_"+bucket, 2*time.Second, 5*time.Second)
defer lock.Release()
if !hasLock {
panic("Failed to obtain lock for locker_amazon_s3_counters_bucket_" + bucket)
}
has = ormService.LoadByID(bucketID, amazonS3BucketCounterEntity)
if !has {
amazonS3BucketCounterEntity.ID = bucketID
amazonS3BucketCounterEntity.Counter = 1
} else {
amazonS3BucketCounterEntity.Counter = amazonS3BucketCounterEntity.Counter + 1
}
ormService.Flush(amazonS3BucketCounterEntity)
ttl := lock.TTL()
if ttl == 0 {
panic("lock lost")
}
return amazonS3BucketCounterEntity.Counter
}
func (amazonS3 *AmazonS3) checkBucket(bucketName string) {
_, ok := amazonS3.bucketsMapping[bucketName]
if !ok {
panic("bucket [" + bucketName + "] not found")
}
}
func (amazonS3 *AmazonS3) getBucketName(bucketName string) string {
if bucketConfig, ok := amazonS3.bucketsConfigDefinitions[bucketName]; ok {
if bucket, ok := bucketConfig[amazonS3.environment]; ok {
return bucket
}
}
return ""
}
func (amazonS3 *AmazonS3) DeleteObject(bucket string, objects ...*Object) bool {
objectIds := make([]*s3.ObjectIdentifier, len(objects))
for i, file := range objects {
objectIds[i] = &s3.ObjectIdentifier{
Key: aws.String(file.StorageKey),
}
}
input := s3.DeleteObjectsInput{
Bucket: aws.String(amazonS3.getBucketName(bucket)),
Delete: &s3.Delete{Objects: objectIds},
}
deletedObjects, err := amazonS3.client.DeleteObjects(&input)
if err != nil {
panic("s3BucketObjectsDelete:" + err.Error())
}
return len(deletedObjects.Deleted) == len(objects)
}
func (amazonS3 *AmazonS3) putObject(ormService *beeorm.Engine, bucket string, objectContent []byte, extension string) Object {
storageCounter := amazonS3.getCounter(ormService, bucket)
objectKey := amazonS3.getObjectKey(storageCounter, extension)
bucket = amazonS3.getBucketName(bucket)
_, err := amazonS3.client.PutObject(&s3.PutObjectInput{
Body: bytes.NewReader(objectContent),
Bucket: aws.String(bucket),
Key: aws.String(objectKey),
})
if err != nil {
panic("s3BucketObjectPut:" + err.Error())
}
return Object{
ID: storageCounter,
StorageKey: objectKey,
}
}
func (amazonS3 *AmazonS3) getObjectKey(storageCounter uint64, fileExtension string) string {
return strconv.FormatUint(storageCounter, 10) + fileExtension
}
func (amazonS3 *AmazonS3) UploadObjectFromFile(ormService *beeorm.Engine, bucket, localFile string) Object {
amazonS3.checkBucket(bucket)
fileContent, ext := amazonS3.ReadFile(localFile)
return amazonS3.putObject(ormService, bucket, fileContent, ext)
}
func (amazonS3 *AmazonS3) UploadObjectFromBase64(ormService *beeorm.Engine, bucket, base64content, extension string) Object {
byteData, err := base64.StdEncoding.DecodeString(base64content)
if err != nil {
panic(err)
}
return amazonS3.putObject(ormService, bucket, byteData, extension)
}
func (amazonS3 *AmazonS3) UploadObjectFromByte(ormService *beeorm.Engine, bucket string, byteData []byte, extension string) Object {
return amazonS3.putObject(ormService, bucket, byteData, extension)
}
func (amazonS3 *AmazonS3) UploadImageFromBase64(ormService *beeorm.Engine, bucket, base64image, extension string) Object {
byteData, err := base64.StdEncoding.DecodeString(base64image)
if err != nil {
panic(err)
}
return amazonS3.putObject(ormService, bucket, byteData, extension)
}
func (amazonS3 *AmazonS3) UploadImageFromFile(ormService *beeorm.Engine, bucket, localFile string) Object {
return amazonS3.UploadObjectFromFile(ormService, bucket, localFile)
}
func (amazonS3 *AmazonS3) ReadFile(localFile string) ([]byte, string) {
fileContent, err := ioutil.ReadFile(localFile)
if err != nil {
panic(err)
}
return fileContent, filepath.Ext(localFile)
}
type CachedObjectURLTemplate struct {
Environment string
BucketName string
StorageKey string
CounterID string
}
func (amazonS3 *AmazonS3) getPublicUrlsForBucket(bucketName string) string {
if bucketConfig, ok := amazonS3.bucketsPublicUrls[bucketName]; ok {
if url, ok := bucketConfig[amazonS3.environment]; ok {
return url
}
}
return ""
}
func (amazonS3 *AmazonS3) GetObjectCachedURL(bucket string, object *Object) string {
amazonS3.checkBucket(bucket)
url := amazonS3.getPublicUrlsForBucket(bucket)
obj := CachedObjectURLTemplate{
Environment: amazonS3.environment,
BucketName: bucket,
StorageKey: object.StorageKey,
CounterID: strconv.FormatUint(object.ID, 10),
}
temp, err := template.New("amazon").Parse(url)
if err != nil {
panic("failed creating new template for amazon s3")
}
buf := new(bytes.Buffer)
err = temp.Execute(buf, obj)
if err != nil {
panic("failed executing the new template for amazon s3")
}
text := buf.String()
return text
}
func (amazonS3 *AmazonS3) GetObjectSignedURL(bucket string, object *Object, expiresIn time.Duration) string {
amazonS3.checkBucket(bucket)
bucketByEnv := amazonS3.getBucketName(bucket)
req, _ := amazonS3.client.GetObjectRequest(&s3.GetObjectInput{
Bucket: aws.String(bucketByEnv),
Key: aws.String(object.StorageKey)},
)
url, err := req.Presign(expiresIn) // Set link expiration time
if err != nil {
panic(err)
}
return url
}
func (amazonS3 *AmazonS3) CreateObjectFromKey(ormService *beeorm.Engine, bucket, key string) Object {
return Object{
ID: amazonS3.getCounter(ormService, bucket),
StorageKey: key,
}
}
func (amazonS3 *AmazonS3) GetClient() interface{} {
return amazonS3.client
}
func (amazonS3 *AmazonS3) GetBucketName(bucket string) string {
return amazonS3.bucketsConfigDefinitions[bucket][amazonS3.environment]
}
type Object struct {
ID uint64
StorageKey string
CachedURL string
Data interface{}
}
type Client interface {
GetClient() interface{}
GetBucketName(bucket string) string
CreateObjectFromKey(ormService *beeorm.Engine, bucket, key string) Object
GetObjectCachedURL(bucket string, object *Object) string
GetObjectSignedURL(bucket string, object *Object, expires time.Duration) string
UploadObjectFromFile(ormService *beeorm.Engine, bucket, localFile string) Object
UploadObjectFromBase64(ormService *beeorm.Engine, bucket, content, extension string) Object
UploadObjectFromByte(ormService *beeorm.Engine, bucket string, data []byte, extension string) Object
UploadImageFromFile(ormService *beeorm.Engine, bucket, localFile string) Object
UploadImageFromBase64(ormService *beeorm.Engine, bucket, image, extension string) Object
DeleteObject(bucket string, objects ...*Object) bool
}