/
data_handler.go
93 lines (73 loc) · 1.61 KB
/
data_handler.go
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package nickandluke
import (
"fmt"
"os"
"strings"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/s3"
"github.com/aws/aws-sdk-go/service/s3/s3manager"
)
const bucket = "nickandluke-guests"
const key = "v1/guests.csv"
const hashedFile = "hashed.txt"
type dataHandler struct {
sess *session.Session
}
func DataHandler(sess *session.Session) *dataHandler {
ret := dataHandler{
sess: sess,
}
return &ret
}
func (dh *dataHandler) Download() error {
file, err := os.Create(guestFile)
if err != nil {
return err
}
defer file.Close()
downloader := s3manager.NewDownloader(dh.sess)
numBytes, err := downloader.Download(file,
&s3.GetObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
})
if err != nil {
return err
}
fmt.Println("Downloaded", file.Name(), numBytes, "bytes")
return nil
}
func (dh *dataHandler) Upload() error {
file, err := os.Open(guestFile)
if err != nil {
return err
}
defer file.Close()
uploader := s3manager.NewUploader(dh.sess)
uploadedOutput, err := uploader.Upload(
&s3manager.UploadInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
Body: file,
})
if err != nil {
return err
}
err = saveHash(uploadedOutput)
if err != nil {
return err
}
fmt.Println("Uploaded", file.Name(), uploadedOutput.UploadID)
return nil
}
func saveHash(uploadedInput *s3manager.UploadOutput) error {
file, err := os.Create(hashedFile)
if err != nil {
return err
}
defer file.Close()
file.WriteString(strings.Trim(*uploadedInput.ETag, "\""))
file.WriteString("\n")
return nil
}