/
uploadS3.go
78 lines (71 loc) · 2.17 KB
/
uploadS3.go
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package awsFunctions
import (
"bytes"
"errors"
"fmt"
"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/gin-gonic/gin"
"github.com/globalsign/mgo/bson"
"log"
"mime/multipart"
"net/http"
"os"
"path/filepath"
)
// set the region
var awsRegion string
func UploadFile(c *gin.Context) (string, error) {
awsRegion := os.Getenv("REGION")
file, fileHeader, err := c.Request.FormFile("file")
if err != nil {
log.Println(err)
return "", errors.New("Error parsing the file from the form")
}
defer file.Close()
fmt.Println("**************************")
fmt.Println(awsRegion)
// Create the AWS Session
s, err := session.NewSession(&aws.Config{
Region: aws.String(awsRegion),
Credentials: credentials.NewEnvCredentials(),
})
if err != nil {
log.Println("Error stablishing the session with AWS")
return "", errors.New("Error stablishing a session with AWS")
}
fileName, err := uploadFileToS3(s, file, fileHeader)
if err != nil {
log.Println(err)
return "", err
}
fmt.Println("File Successfully Uploaded: ", fileName)
return fileName, nil
}
func uploadFileToS3(s *session.Session, file multipart.File, fileHeader *multipart.FileHeader) (string, error) {
// get the file size and pass the file into a buffer
size := fileHeader.Size
buffer := make([]byte, size)
file.Read(buffer)
// get the bucket name
bucketName := os.Getenv("S3_IMAGE_BUCKET")
// create a unique file name for the file
tempFileName := "pictures/" + bson.NewObjectId().Hex() + filepath.Ext(fileHeader.Filename)
_, err := s3.New(s).PutObject(&s3.PutObjectInput{
Bucket: aws.String(bucketName),
Key: aws.String(tempFileName),
ACL: aws.String("public-read"),
Body: bytes.NewReader(buffer),
ContentLength: aws.Int64(int64(size)),
ContentType: aws.String(http.DetectContentType(buffer)),
ContentDisposition: aws.String("attachment"),
ServerSideEncryption: aws.String("AES256"),
StorageClass: aws.String("STANDARD"),
})
if err != nil {
return "", err
}
return tempFileName, nil
}