jsonutil

Documentation

Overview

Package jsonutil provides hardened JSON decoding helpers for untrusted input. Invariants: duplicate object keys are rejected; strict mode can reject unknown fields.

Index

• Constants
• func DecodeNoDup[T any](jsonBytes []byte) (T, error)
• func DecodeStrict[T any](jsonBytes []byte) (T, error)
• func ValidateNoDuplicateKeys(data []byte) error

Constants

const MaxSafeInt int64 = (1 << 53) - 1

MaxSafeInt is the maximum integer exactly representable in JSON (2^53 - 1).

Functions

func DecodeNoDup

func DecodeNoDup[T any](jsonBytes []byte) (T, error)

DecodeNoDup decodes JSON into a Go struct while enforcing no duplicate keys. Unknown fields are allowed for forward compatibility.

func DecodeStrict

func DecodeStrict[T any](jsonBytes []byte) (T, error)

DecodeStrict decodes JSON into a Go struct while enforcing no duplicate keys and disallowing unknown fields.

func ValidateNoDuplicateKeys

func ValidateNoDuplicateKeys(data []byte) error

ValidateNoDuplicateKeys checks for duplicate object keys in JSON. Uses streaming because json.Unmarshal silently keeps only the last duplicate.