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Rewrite function from scratch
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This commit is contained in:
JanHoefelmeyer 2025-07-03 10:58:32 +02:00
parent fc3837d655
commit e7c08d05cd
1 changed files with 13 additions and 10 deletions
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23
internal/misc/json.go
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@ -3,8 +3,8 @@
//
// SPDX-License-Identifier: Apache-2.0
//
// SPDX-FileCopyrightText: 2023 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
// Software-Engineering: 2023 Intevation GmbH <https://intevation.de>
// SPDX-FileCopyrightText: 2025 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
// Software-Engineering: 2025 Intevation GmbH <https://intevation.de>
package misc
@ -14,20 +14,23 @@ import (
"io"
)
// StrictJSONParse provides JSON parsing with stronger validation.
// StrictJSONParse creates a JSON decoder that decodes an interface
// while not allowing unknown fields nor trailing data
func StrictJSONParse(jsonData io.Reader, target interface{}) error {
decoder := json.NewDecoder(jsonData)
// Don't allow unknown fields
decoder.DisallowUnknownFields()
err := decoder.Decode(target)
if err != nil {
return fmt.Errorf("strictJSONParse: %w", err)
if err := decoder.Decode(target); err != nil {
return fmt.Errorf("JSON decoding error: %w", err)
}
token, err := decoder.Token()
if err != io.EOF {
return fmt.Errorf("strictJSONParse: unexpected trailing data after JSON: token: %v, err: %v", token, err)
// Check for any trailing data after the main JSON structure
if _, err := decoder.Token(); err != io.EOF {
if err != nil {
return fmt.Errorf("error reading trailing data: %w", err)
}
return fmt.Errorf("unexpected trailing data after JSON object")
}
return nil