Method json

context.go:546–566

(code int, i any, indent string)

}

func (c *Context) json(code int, i any, indent string) error {
	c.writeContentType(MIMEApplicationJSON)

	// as JSONSerializer.Serialize can fail, and in that case we need to delay sending status code to the client until
	// (global) error handler decides correct status code for the error to be sent to the client.
	// For that we need to use writer that can store the proposed status code until the first Write is called.
	resp := c.Response()
	// Reuse the Context-owned delayedStatusWriter to avoid heap-allocating one per JSON response.
	// If we are already nested inside a delayed write (rare: a serializer or handler calling c.JSON
	// re-entrantly), allocate a fresh writer so the outer call's writer (which is &c.dsw) is not
	// clobbered — reusing c.dsw here would make it reference itself.
	if _, nested := resp.(*delayedStatusWriter); nested {
		c.SetResponse(&delayedStatusWriter{ResponseWriter: resp, status: code})
	} else {
		c.dsw = delayedStatusWriter{ResponseWriter: resp, status: code}
		c.SetResponse(&c.dsw)
	}
	defer c.SetResponse(resp)

	return c.echo.JSONSerializer.Serialize(c, i, indent)
}

// JSON sends a JSON response with status code.
func (c *Context) JSON(code int, i any) (err error) {