JSON without escaping

[qulxizer]

I need to serve JSON responses that include full URLs containing query parameters. However, I'm encountering an issue where the URLs are being escaped—for example, characters like & and = in query parameters are converted to \u0026 and \u003d.

In the Go standard library, json.Encoder.SetEscapeHTML(false) allows disabling this behavior. Is there a similar way to achieve this in Echo when using c.JSON(...), or do I need to manually handle the response to prevent escaping?

[evgenybf]

It's possible to specify your own JSONSerializer instead of the default one and set enc.SetEscapeHTML(false) during serialization:

	e := echo.New()
	e.JSONSerializer = &MyJSONSerializer{}
...

// DefaultJSONSerializer implements JSON encoding using encoding/json.
type MyJSONSerializer echo.DefaultJSONSerializer

// Serialize converts an interface into a json and writes it to the response.
// You can optionally use the indent parameter to produce pretty JSONs.
func (d MyJSONSerializer) Serialize(c echo.Context, i interface{}, indent string) error {
	enc := json.NewEncoder(c.Response())
	enc.SetEscapeHTML(false)
	if indent != "" {
		enc.SetIndent("", indent)
	}
	return enc.Encode(i)
}

// Deserialize reads a JSON from a request body and converts it into an interface.
func (d MyJSONSerializer) Deserialize(c echo.Context, i interface{}) error {
	return echo.DefaultJSONSerializer(d).Deserialize(c, i)
}

See how it''s implemented in Echo:

• https://github.com/search?q=repo%3Alabstack%2Fecho%20DefaultJSONSerializer&type=code