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README.md

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strict-json

This is a fork of Go's standard encoding/json with the following changes to Unmarshal:

  • Does not allow unmarshaling nulls into primitives (strings, ints...)
  • Adds required struct tag to force a field to be present when unmarshaling.
  • Errors on two object fields with the same key (original one keeps the value of the last appearance
  • Strictly case sensitive.

strict-json is API compatible with the original encoding/json, you can drop it in place and it should just work.

strict-json is ideal for unmarshaling request bodies of a JSON REST API. If your API is too liberal when unmarshaling JSON, clients might end up depending on that behavior, forcing you to support it forever. The best solution is to be as strict as possible.

For further strictness, it's highly recommended to set DisallowUnknownFields (also present on the original encoding/json).