Added final formats in golang cource, GOB and Protobuf

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

@@ -2,4 +2,7 @@ module 06f_formats
 
 go 1.23.2
 
-require gopkg.in/yaml.v3 v3.0.1 // indirect
+require (
+	google.golang.org/protobuf v1.35.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

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

@@ -1,3 +1,5 @@
+google.golang.org/protobuf v1.35.1 h1:m3LfL6/Ca+fqnjnlqQXNpFPABW1UD7mjh8KO2mKFytA=
+google.golang.org/protobuf v1.35.1/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

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

@@ -0,0 +1,38 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"bytes"
+	"encoding/gob"
+)
+
+func EncodeGob() []byte {
+	var buf bytes.Buffer
+	enc := gob.NewEncoder(&buf)
+
+	m := make(map[string]string)
+	m["foo"] = "bar"
+
+	if err := enc.Encode(m); err != nil {
+		log.Fatal(err)
+	}
+
+	return buf.Bytes()
+}
+
+func DecodeGob(input []byte) {
+	buf := bytes.NewBuffer(input)
+	dec := gob.NewDecoder(buf)
+
+	m := make(map[string]string)
+
+	if err := dec.Decode(&m); err != nil {
+		log.Fatal(err)
+	}
+	fmt.Println(m["foo"])
+}
+
+func main() {
+	DecodeGob(EncodeGob())
+}

examples/golang/cource/06f_formats/person.proto

@@ -0,0 +1,8 @@
+syntax="proto3";
+
+option go_package = "examples/gen;gen";
+
+message Person {
+	string name = 1;
+	int32 age = 2;
+}

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

@@ -0,0 +1,46 @@
+package main
+
+/*
+Some preparations:
+sudo apt install protobuf-compiler
+go install google.golang.org/protobuf/cmd/protoc-gen-go@latest
+go get google.golang.org/protobuf/proto
+go get google.golang.org/protobuf/reflect/protoreflec
+go get google.golang.org/protobuf/runtime/protoimpl
+protoc person.proto --go_out=./
+*/
+
+import (
+	"fmt"
+	"log"
+	"golang/cource/06f_formats/examples/gen"
+	"google.golang.org/protobuf/proto"
+)
+
+func ProtobufCase() {
+	pedro := gen.Person{
+		Name: "Pedro",
+		Age: 43,
+	}
+
+	data, err := proto.Marshal(&pedro)
+	if err != nil {
+		log.Fatal("Marshaling error: %v", err)
+	}
+
+	fmt.Println(data)
+
+	otherPedro := &gen.Person{}
+	err = proto.Unmarshal(data, otherPedro)
+	if err != nil {
+		log.Fatal("Unmarshaling error: %v", err)
+	}
+
+	fmt.Println(otherPedro.GetName())
+	fmt.Println(otherPedro.GetAge())
+}
+
+
+func main() {
+	ProtobufCase()
+}