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s3.go
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s3.go
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package main
import (
"fmt"
"io/ioutil"
"net/http"
"strings"
"github.com/aws/aws-sdk-go/aws/credentials"
"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/pkg/errors"
)
const testS3File = "cats-test-file"
const testS3Content = "cats-test-content"
func s3Handler(w http.ResponseWriter, r *http.Request) {
err := testS3BucketAccess()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
writeJson(w, map[string]interface{}{
"success": true,
})
}
func testS3BucketAccess() error {
var vcapService struct {
AWSRegion string `json:"aws_region"`
AWSAccessKeyID string `json:"aws_access_key_id"`
AWSSecretAccessKey string `json:"aws_secret_access_key"`
BucketName string `json:"bucket_name"`
}
err := getVCAPServiceCredentials("aws-s3-bucket", &vcapService)
if err != nil {
return errors.Wrap(err, "failed to parse VCAP_SERVICES")
}
sess := session.Must(session.NewSession(&aws.Config{
Region: aws.String(vcapService.AWSRegion),
Credentials: credentials.NewStaticCredentials(vcapService.AWSAccessKeyID, vcapService.AWSSecretAccessKey, ""),
}))
s3Client := s3.New(sess)
_, err = s3Client.ListObjects(&s3.ListObjectsInput{
Bucket: aws.String(vcapService.BucketName),
})
if err != nil {
return errors.Wrap(err, "ListObjects")
}
_, err = s3Client.PutObject(&s3.PutObjectInput{
Bucket: aws.String(vcapService.BucketName),
Key: aws.String(testS3File),
Body: strings.NewReader(testS3Content),
})
if err != nil {
return errors.Wrap(err, "PutObject")
}
getObjectOutput, err := s3Client.GetObject(&s3.GetObjectInput{
Bucket: aws.String(vcapService.BucketName),
Key: aws.String(testS3File),
})
if err != nil {
return errors.Wrap(err, "GetObject")
}
content, err := ioutil.ReadAll(getObjectOutput.Body)
if err != nil {
return errors.Wrap(err, "ioutil.ReadAll")
}
defer getObjectOutput.Body.Close()
taggingOutput, err := s3Client.GetObjectTagging(&s3.GetObjectTaggingInput{
Bucket: aws.String(vcapService.BucketName),
Key: aws.String(testS3File),
})
if err != nil {
return errors.Wrap(err, "GetObjectTagging")
}
if len(taggingOutput.TagSet) != 0 {
return fmt.Errorf("expected empty TagSet for %q, but was %q", testS3File, taggingOutput.TagSet)
}
if string(content) != testS3Content {
return fmt.Errorf("content mismatch, was writing %q but read %q", testS3Content, string(content))
}
_, err = s3Client.DeleteObject(&s3.DeleteObjectInput{
Bucket: aws.String(vcapService.BucketName),
Key: aws.String(testS3File),
})
if err != nil {
return errors.Wrap(err, "DeleteObject")
}
return nil
}