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storage_cors_add.go
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storage_cors_add.go
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package cmd
import (
"errors"
"fmt"
"strings"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/service/s3"
s3types "github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/aws/smithy-go"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
const (
storageCORSAddCmdFlagAllowedOrigin = "allowed-origin"
storageCORSAddCmdFlagAllowedMethod = "allowed-method"
storageCORSAddCmdFlagAllowedHeader = "allowed-header"
)
// storageCORSRuleFromCmdFlags returns a non-nil pointer to a storageCORSRule struct if at least
// one of the CORS-related command flags is set.
func storageCORSRuleFromCmdFlags(flags *pflag.FlagSet) *storageCORSRule {
var cors *storageCORSRule
flags.VisitAll(func(flag *pflag.Flag) {
switch flag.Name {
case storageCORSAddCmdFlagAllowedOrigin:
if v, _ := flags.GetStringSlice(storageCORSAddCmdFlagAllowedOrigin); len(v) > 0 {
if cors == nil {
cors = &storageCORSRule{}
}
cors.AllowedOrigins = v
}
case storageCORSAddCmdFlagAllowedMethod:
if v, _ := flags.GetStringSlice(storageCORSAddCmdFlagAllowedMethod); len(v) > 0 {
if cors == nil {
cors = &storageCORSRule{}
}
cors.AllowedMethods = v
}
case storageCORSAddCmdFlagAllowedHeader:
if v, _ := flags.GetStringSlice(storageCORSAddCmdFlagAllowedHeader); len(v) > 0 {
if cors == nil {
cors = &storageCORSRule{}
}
cors.AllowedHeaders = v
}
default:
return
}
})
return cors
}
var storageCORSAddCmd = &cobra.Command{
Use: "add sos://BUCKET",
Short: "Add a CORS configuration rule to a bucket",
Long: `This command adds a new rule to the current bucket CORS
configuration.
Example:
exo storage cors add sos://my-bucket \
--allowed-origin "https://my-website.net" \
--allowed-method "*"
`,
PreRunE: func(cmd *cobra.Command, args []string) error {
if len(args) != 1 {
cmdExitOnUsageError(cmd, "invalid arguments")
}
args[0] = strings.TrimPrefix(args[0], storageBucketPrefix)
return cmdCheckRequiredFlags(cmd, []string{
storageCORSAddCmdFlagAllowedOrigin,
storageCORSAddCmdFlagAllowedMethod,
})
},
RunE: func(cmd *cobra.Command, args []string) error {
bucket := args[0]
certsFile, err := cmd.Flags().GetString("certs-file")
if err != nil {
return err
}
storage, err := newStorageClient(
storageClientOptWithCertsFile(certsFile),
storageClientOptZoneFromBucket(bucket),
)
if err != nil {
return fmt.Errorf("unable to initialize storage client: %v", err)
}
cors := storageCORSRuleFromCmdFlags(cmd.Flags())
if err := storage.addBucketCORSRule(bucket, cors); err != nil {
return fmt.Errorf("unable to add rule to the bucket CORS configuration: %s", err)
}
if !gQuiet {
return output(storage.showBucket(bucket))
}
return nil
},
}
func init() {
storageCORSAddCmd.Flags().StringSlice(storageCORSAddCmdFlagAllowedOrigin, nil,
"allowed origin (can be repeated multiple times)")
storageCORSAddCmd.Flags().StringSlice(storageCORSAddCmdFlagAllowedMethod, nil,
"allowed method (can be repeated multiple times)")
storageCORSAddCmd.Flags().StringSlice(storageCORSAddCmdFlagAllowedHeader, nil,
"allowed header (can be repeated multiple times)")
storageCORSCmd.AddCommand(storageCORSAddCmd)
}
func (c *storageClient) addBucketCORSRule(bucket string, cors *storageCORSRule) error {
curCORS, err := c.GetBucketCors(gContext, &s3.GetBucketCorsInput{Bucket: aws.String(bucket)})
if err != nil {
var apiErr smithy.APIError
if errors.As(err, &apiErr) {
if apiErr.ErrorCode() == "NoSuchCORSConfiguration" {
curCORS = &s3.GetBucketCorsOutput{}
}
}
if cors == nil {
return fmt.Errorf("unable to retrieve bucket CORS configuration: %s", err)
}
}
_, err = c.PutBucketCors(gContext, &s3.PutBucketCorsInput{
Bucket: &bucket,
CORSConfiguration: &s3types.CORSConfiguration{
CORSRules: append(curCORS.CORSRules, cors.toS3()),
},
})
return err
}