/
generateS3Policy.go
51 lines (41 loc) · 1.07 KB
/
generateS3Policy.go
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package main
import (
"bytes"
"encoding/json"
"fmt"
"text/template"
)
func GenerateS3Policy(instanceID string, buckets map[string]Bucket) (string, error) {
t := template.Must(template.ParseFiles("group_policy.json.tmpl"))
var (
BucketRsrcs []string = []string{}
ObjectsRsrcs []string = []string{}
)
for _, bucket := range buckets {
BucketRsrcs = append(BucketRsrcs, fmt.Sprintf("urn:sgws:s3:::%s", bucket.name))
ObjectsRsrcs = append(ObjectsRsrcs, fmt.Sprintf("urn:sgws:s3:::%s/*", bucket.name))
}
if len(BucketRsrcs) == 0 {
return "{}", nil
}
brBytes, err := json.Marshal(BucketRsrcs)
if err != nil {
return "", fmt.Errorf("Error generating policy: %s", err)
}
orBytes, err := json.Marshal(ObjectsRsrcs)
if err != nil {
return "", fmt.Errorf("Error generating policy: %s", err)
}
data := struct {
InstanceID string
BucketResources string
ObjectResources string
}{
InstanceID: instanceID,
BucketResources: string(brBytes),
ObjectResources: string(orBytes),
}
var b bytes.Buffer
t.Execute(&b, data)
return b.String(), nil
}