golangでAWSのS3でPre-Signed URLを作成するコード

package main

import (
    "fmt"
    "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"
)

func main() {
    accessKey := "your accessKey"
    privateKey := "your privateKey"
    region := "ap-northeast-1"
    bucketName := "your bucketName"
    fileName := "gazou.png"

    creds := credentials.NewStaticCredentials(accessKey, privateKey, "")
    sess := session.Must(session.NewSession(&aws.Config{
        Credentials: creds,
        Region:      aws.String(region),
    }))
    s3Client := s3.New(sess)

    req, _ := s3Client.PutObjectRequest(&s3.PutObjectInput{
        Bucket: aws.String(bucketName),
        Key:    aws.String("/test/" + fileName),
    })
    u, err := req.Presign(3 * time.Minute) // 有効期限3分
    if err != nil {
        fmt.Println("error presigning request", err)
        return
    }
    fmt.Println(u)
}

出来上がったURLは、postmanとかのGUIクライアント使うとリクエストしやすいです。

postman download

また、下記でcurlできます。file部分がWindowsパス名なので、MacとかLinuxユーザは適宜変えてください。

curl --location --request PUT 'Created Pre-SignedURL' \
--header 'Content-Type: image/png' \
--data-binary '@/C:/test.png'