a0c557f38a
* add mapstructure tags to Namespace struct * add custom metadata Parse helper * add ns custom metadata and patch
104 lines
3.2 KiB
Go
104 lines
3.2 KiB
Go
package custommetadata
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/mitchellh/mapstructure"
|
|
|
|
"github.com/hashicorp/go-multierror"
|
|
"github.com/hashicorp/go-secure-stdlib/strutil"
|
|
)
|
|
|
|
// The following constants are used by Validate and are meant to be imposed
|
|
// broadly for consistency.
|
|
const (
|
|
maxKeys = 64
|
|
maxKeyLength = 128
|
|
maxValueLength = 512
|
|
validationErrorPrefix = "custom_metadata validation failed"
|
|
)
|
|
|
|
// Parse is used to effectively convert the TypeMap
|
|
// (map[string]interface{}) into a TypeKVPairs (map[string]string)
|
|
// which is how custom_metadata is stored. Defining custom_metadata
|
|
// as a TypeKVPairs will convert nulls into empty strings. A null,
|
|
// however, is essential for a PATCH operation in that it signals
|
|
// the handler to remove the field. The filterNils flag should
|
|
// only be used during a patch operation.
|
|
func Parse(raw map[string]interface{}, filterNils bool) (map[string]string, error) {
|
|
customMetadata := map[string]string{}
|
|
for k, v := range raw {
|
|
if filterNils && v == nil {
|
|
continue
|
|
}
|
|
|
|
var s string
|
|
if err := mapstructure.WeakDecode(v, &s); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
customMetadata[k] = s
|
|
}
|
|
|
|
return customMetadata, nil
|
|
}
|
|
|
|
// Validate will perform input validation for custom metadata.
|
|
// CustomMetadata should be arbitrary user-provided key-value pairs meant to
|
|
// provide supplemental information about a resource. If the key count
|
|
// exceeds maxKeys, the validation will be short-circuited to prevent
|
|
// unnecessary (and potentially costly) validation to be run. If the key count
|
|
// falls at or below maxKeys, multiple checks will be made per key and value.
|
|
// These checks include:
|
|
// - 0 < length of key <= maxKeyLength
|
|
// - 0 < length of value <= maxValueLength
|
|
// - keys and values cannot include unprintable characters
|
|
func Validate(cm map[string]string) error {
|
|
var errs *multierror.Error
|
|
|
|
if keyCount := len(cm); keyCount > maxKeys {
|
|
errs = multierror.Append(errs, fmt.Errorf("%s: payload must contain at most %d keys, provided %d",
|
|
validationErrorPrefix,
|
|
maxKeys,
|
|
keyCount))
|
|
|
|
return errs.ErrorOrNil()
|
|
}
|
|
|
|
// Perform validation on each key and value and return ALL errors
|
|
for key, value := range cm {
|
|
if keyLen := len(key); 0 == keyLen || keyLen > maxKeyLength {
|
|
errs = multierror.Append(errs, fmt.Errorf("%s: length of key %q is %d but must be 0 < len(key) <= %d",
|
|
validationErrorPrefix,
|
|
key,
|
|
keyLen,
|
|
maxKeyLength))
|
|
}
|
|
|
|
if valueLen := len(value); 0 == valueLen || valueLen > maxValueLength {
|
|
errs = multierror.Append(errs, fmt.Errorf("%s: length of value for key %q is %d but must be 0 < len(value) <= %d",
|
|
validationErrorPrefix,
|
|
key,
|
|
valueLen,
|
|
maxValueLength))
|
|
}
|
|
|
|
if !strutil.Printable(key) {
|
|
// Include unquoted format (%s) to also include the string without the unprintable
|
|
// characters visible to allow for easier debug and key identification
|
|
errs = multierror.Append(errs, fmt.Errorf("%s: key %q (%s) contains unprintable characters",
|
|
validationErrorPrefix,
|
|
key,
|
|
key))
|
|
}
|
|
|
|
if !strutil.Printable(value) {
|
|
errs = multierror.Append(errs, fmt.Errorf("%s: value for key %q contains unprintable characters",
|
|
validationErrorPrefix,
|
|
key))
|
|
}
|
|
}
|
|
|
|
return errs.ErrorOrNil()
|
|
}
|