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storage_headers_add.go
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/
storage_headers_add.go
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package cmd
import (
"fmt"
"strings"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
s3types "github.com/aws/aws-sdk-go-v2/service/s3/types"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var storageHeaderAddCmd = &cobra.Command{
Use: "add sos://BUCKET/(OBJECT|PREFIX/)",
Short: "Add HTTP headers to an object",
Long: fmt.Sprintf(`This command adds response HTTP headers to objects.
Example:
exo storage headers add sos://my-bucket/data.json \
--content-type=application/json \
--cache-control=no-store
Note: adding an already existing header will overwrite its value.
Supported output template annotations: %s`,
strings.Join(outputterTemplateAnnotations(&storageShowObjectOutput{}), ", ")),
PreRunE: func(cmd *cobra.Command, args []string) error {
if len(args) != 1 {
cmdExitOnUsageError(cmd, "invalid arguments")
}
args[0] = strings.TrimPrefix(args[0], storageBucketPrefix)
if !strings.Contains(args[0], "/") {
cmdExitOnUsageError(cmd, fmt.Sprintf("invalid argument: %q", args[0]))
}
if headers := storageHeadersFromCmdFlags(cmd.Flags()); headers == nil {
cmdExitOnUsageError(cmd, "no header flag specified")
}
return nil
},
RunE: func(cmd *cobra.Command, args []string) error {
var (
bucket string
prefix string
)
certsFile, err := cmd.Flags().GetString("certs-file")
if err != nil {
return err
}
recursive, err := cmd.Flags().GetBool("recursive")
if err != nil {
return err
}
parts := strings.SplitN(args[0], "/", 2)
bucket, prefix = parts[0], parts[1]
storage, err := newStorageClient(
storageClientOptWithCertsFile(certsFile),
storageClientOptZoneFromBucket(bucket),
)
if err != nil {
return fmt.Errorf("unable to initialize storage client: %v", err)
}
headers := storageHeadersFromCmdFlags(cmd.Flags())
if err := storage.updateObjectsHeaders(bucket, prefix, headers, recursive); err != nil {
return fmt.Errorf("unable to add headers to object: %s", err)
}
if !gQuiet && !recursive && !strings.HasSuffix(prefix, "/") {
return output(storage.showObject(bucket, prefix))
}
if !gQuiet {
fmt.Println("Headers added successfully")
}
return nil
},
}
func init() {
storageHeaderAddCmd.Flags().BoolP("recursive", "r", false,
"add headers recursively (with object prefix only)")
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderCacheControl), "",
`value for "Cache-Control" header`)
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderContentDisposition), "",
`value for "Content-Disposition" header`)
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderContentEncoding), "",
`value for "Content-Encoding" header`)
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderContentLanguage), "",
`value for "Content-Language" header`)
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderContentType), "",
`value for "Content-Type" header`)
storageHeaderAddCmd.Flags().String(strings.ToLower(storageObjectHeaderExpires), "",
`value for "Expires" header`)
storageHeaderCmd.AddCommand(storageHeaderAddCmd)
}
func (c *storageClient) updateObjectHeaders(bucket, key string, headers map[string]*string) error {
object, err := c.copyObject(bucket, key)
if err != nil {
return err
}
lookupHeader := func(key string, fallback *string) *string {
if v, ok := headers[key]; ok {
return v
}
return fallback
}
object.CacheControl = lookupHeader(storageObjectHeaderCacheControl, object.CacheControl)
object.ContentDisposition = lookupHeader(storageObjectHeaderContentDisposition, object.ContentDisposition)
object.ContentEncoding = lookupHeader(storageObjectHeaderContentEncoding, object.ContentEncoding)
object.ContentLanguage = lookupHeader(storageObjectHeaderContentLanguage, object.ContentLanguage)
object.ContentType = lookupHeader(storageObjectHeaderContentType, object.ContentType)
// For some reason, the AWS SDK doesn't use the same type for the "Expires"
// header in GetObject (*string) and CopyObject (*time.Time)...
if v, ok := headers[storageObjectHeaderExpires]; ok {
t, err := time.Parse(time.RFC822, aws.ToString(v))
if err != nil {
return fmt.Errorf(`invalid "Expires" header value %q, expecting RFC822 format`, err)
}
object.Expires = &t
}
_, err = c.CopyObject(gContext, object)
return err
}
func (c *storageClient) updateObjectsHeaders(bucket, prefix string, headers map[string]*string, recursive bool) error {
return c.forEachObject(bucket, prefix, recursive, func(o *s3types.Object) error {
return c.updateObjectHeaders(bucket, aws.ToString(o.Key), headers)
})
}
// storageHeadersFromCmdFlags returns a non-nil map if at least
// one of the header-related command flags is set.
func storageHeadersFromCmdFlags(flags *pflag.FlagSet) map[string]*string {
var headers map[string]*string
flags.VisitAll(func(flag *pflag.Flag) {
switch flag.Name {
case strings.ToLower(storageObjectHeaderCacheControl):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderCacheControl] = aws.String(v)
}
case strings.ToLower(storageObjectHeaderContentDisposition):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderContentDisposition] = aws.String(v)
}
case strings.ToLower(storageObjectHeaderContentEncoding):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderContentEncoding] = aws.String(v)
}
case strings.ToLower(storageObjectHeaderContentLanguage):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderContentLanguage] = aws.String(v)
}
case strings.ToLower(storageObjectHeaderContentType):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderContentType] = aws.String(v)
}
case strings.ToLower(storageObjectHeaderExpires):
if v := flag.Value.String(); v != "" {
if headers == nil {
headers = make(map[string]*string)
}
headers[storageObjectHeaderExpires] = aws.String(v)
}
default:
return
}
})
return headers
}