prettyjson

package main

import (
	"fmt"
	"os"

	"github.com/searKing/golang/go/encoding/prettyjson"
)

func main() {
	type ColorGroup struct {
		ID        int
		Name      string
		LongName  string
		Colors    []string
		ColorById map[string]string
		Url       string
		LongUrl   string
		Empty     struct {
			ID   int
			Name string
		}
	}
	group := ColorGroup{
		ID:        1,
		Name:      "Reds",
		LongName:  "The quick brown fox jumps over the lazy dog",
		Colors:    []string{"The quick brown fox jumps over the lazy dog", "Crimson", "Red", "Ruby", "Maroon"},
		ColorById: map[string]string{"0": "red", "1": "green", "2": "blue", "3": "while"},
		Url:       "https://example.com/tests/1?foo=1&bar=baz",
		LongUrl:   "https://example.com/tests/1.html?foo=1&bar=baz&a=0&b=1&c=2&d=3#paragraph",
	}
	b, err := prettyjson.Marshal(group,
		prettyjson.WithEncOptsTruncateString(10),
		prettyjson.WithEncOptsTruncateBytes(10),
		prettyjson.WithEncOptsTruncateSliceOrArray(2),
		prettyjson.WithEncOptsTruncateMap(2),
		prettyjson.WithEncOptsTruncateUrl(true),
		prettyjson.WithEncOptsEscapeHTML(false),
		prettyjson.WithEncOptsOmitEmpty(true))
	if err != nil {
		fmt.Println("error:", err)
	}
	_, _ = os.Stdout.Write(b)

}

Output:

{"ID":1,"Name":"Reds","LongName":"The quick ...43 chars","Colors":["The quick ...43 chars","Crimson", "...5 elems"],"ColorById":{"0":"red","1":"green","...4 pairs":"4"},"Url":"https://example.com/tests/1?foo=1&bar=baz","LongUrl":"https://example.com/tests/1.html ...72 chars,6Q9F]"}