aws-sdk-go で s3 をさわってみるメモ

download-test.sh

$ go build ./download.go
$ ./download
spam! spam! spam!

download.go

package main

import (
        "fmt"
        "io/ioutil"
        "log"

        "github.com/aws/aws-sdk-go/aws"
        "github.com/aws/aws-sdk-go/aws/session"
        "github.com/aws/aws-sdk-go/service/s3"
)

var sess *session.Session = session.Must(session.NewSession())

var config *aws.Config = &aws.Config{
        Region: aws.String("ap-northeast-1"),
}

var s3Client *s3.S3 = s3.New(sess, config)

func main() {
        input := &s3.GetObjectInput{
                Bucket: aws.String("example.com"),
                Key:    aws.String("spam.txt"),
        }
        res, err := s3Client.GetObject(input)
        if err != nil {
                log.Fatal(err)
        }

        defer res.Body.Close()
        body, err := ioutil.ReadAll(res.Body)
        if err != nil {
                log.Fatal(err)
        }
        fmt.Println(string(body))
}

setup-environment.sh

$ mkdir spam
$ cd spam
$ export AWS_ACCESS_KEY_ID='my id here'
$ export AWS_SECRET_ACCESS_KEY='my secret here'
$ export GOPATH=`pwd`
$ go get github.com/aws/aws-sdk-go
$ ls
pkg  src

upload-test.sh

$ go build ./upload.go
$ ./upload
{
  ETag: "..."
}

upload.go

package main

import (
        "bytes"
        "fmt"
        "log"

        "github.com/aws/aws-sdk-go/aws"
        "github.com/aws/aws-sdk-go/aws/session"
        "github.com/aws/aws-sdk-go/service/s3"
)

var sess *session.Session = session.Must(session.NewSession())

var config *aws.Config = &aws.Config{
        Region: aws.String("ap-northeast-1"),
}

var s3Client *s3.S3 = s3.New(sess, config)

func main() {
        input := &s3.PutObjectInput{
                Bucket:       aws.String("example.com"),
                Key:          aws.String("spam.txt"),
                Body:         bytes.NewReader([]byte("spam! spam! spam!")),
                ContentType:  aws.String("text/plain"),
                CacheControl: aws.String("max-age=86400"),
        }
        res, err := s3Client.PutObject(input)
        if err != nil {
                log.Fatal(err)
        }
        fmt.Println(res)
}