Added golang examples marshal/unmarshal json

examples/golang/cource/06f_formats/custom.json

@@ -0,0 +1,8 @@
+{
+  "request": {
+	  "user":"Admin",
+	  "msg":"Try some other...",
+	  "tags": "main,some,shit"
+  },
+  "user":"Admin2"
+}

examples/golang/cource/06f_formats/example.json

@@ -0,0 +1,7 @@
+{
+  "request": {
+	  "user":"Admin",
+	  "msg":"Try some other..."
+  },
+  "user":"Admin2"
+}

examples/golang/cource/06f_formats/json.go

@@ -0,0 +1,126 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"encoding/json"
+	"strings"
+)
+
+type RequestContent struct {
+	User	string
+	Message	string `json:"msg"`
+}
+
+type Request struct {
+	Request RequestContent
+	Author	string `json:"user"`
+}
+
+type strslice []string
+
+func (ss *strslice) UnmarshalJSON(data []byte) error {
+	var s string
+	if err := json.Unmarshal(data, &s); err != nil {
+		return err
+	}
+	*ss = strings.Split(s, ",")
+	return nil
+}
+
+type RequestContentTag struct {
+	User string
+	Message string `json:"msg"`
+	Tags strslice `json:"tags"`
+}
+
+type RequestTagged struct {
+	Request RequestContentTag
+	Author string `json:"user"`
+}
+
+type Dimensions struct {
+	Height	int
+	Width	int
+}
+
+type Bird struct {
+	Species		string
+	Description	string
+	Dimensions Dimensions
+}
+
+func ParseJson(birdJson string) {
+//	birdJson := `{"species":"pingeon","description":"Likes to perch on rocks...","dimensions":{"height": 22,"width": 41}}`
+	var bird Bird
+	err := json.Unmarshal([]byte(birdJson), &bird)
+	if err != nil {
+		panic(err)
+	}
+	fmt.Println(bird)
+}
+
+func ParseJsonArrays() {
+	arraysJson := `["some","word","list"]`
+	var nums []string
+
+	json.Unmarshal([]byte(arraysJson), &nums)
+	fmt.Println(nums)
+}
+
+func CreateJson() string {
+	bird := Bird{
+		Species:	"Eagle",
+		Description:	"Some eagle.",
+		Dimensions: Dimensions{
+			Height:	120,
+			Width: 60,
+		},
+	}
+//	data, _ := json.Marshal(bird)
+	data, _ := json.MarshalIndent(bird, " ", "  ")
+	fmt.Println(string(data))
+	return string(data)
+}
+
+func LoadAndParceJson() {
+	jsonData, err := os.ReadFile("example.json")
+	fmt.Println(err)
+	var request Request
+	fmt.Println(json.Unmarshal(jsonData, &request))
+	fmt.Println(request)
+}
+
+func LoadAndParseRawMsgToMap() {
+	jsonData, _ := os.ReadFile("example.json")
+	var objmap map[string]interface{}
+	json.Unmarshal(jsonData, &objmap)
+	fmt.Println(objmap)
+}
+
+func LoadAndParseRawMsg() {
+	jsonData, _ := os.ReadFile("example.json")
+	var objmap map[string]json.RawMessage
+	json.Unmarshal(jsonData, &objmap)
+	fmt.Println(objmap)
+	var internalMap map[string]string
+	json.Unmarshal(objmap["request"], &internalMap)
+	fmt.Println(internalMap)
+}
+
+func LoadAndParseJsonToCustomStruct() {
+	jsonData, err := os.ReadFile("custom.json")
+	fmt.Println(err)
+	var request RequestTagged
+	fmt.Println(json.Unmarshal(jsonData, &request))
+	fmt.Println(request)
+}
+
+func main() {
+	ParseJson(CreateJson())
+	ParseJsonArrays()
+	LoadAndParceJson()
+	LoadAndParseRawMsgToMap()
+	LoadAndParseRawMsg()
+	LoadAndParseJsonToCustomStruct()
+}

examples/golang/cource/06f_formats/main.go

@@ -0,0 +1,8 @@
+package main
+
+import (
+	"fmt"
+)
+
+func main() {
+}