Tutorial protobuf of golang

1, download protobuf compiler protoc

address:https://github.com/google/protobuf/releases

window:
    Download: protoc-3.3.0-win32.zip
    unzip, copy protoc.exe in the bin directory to GOPATH / bin, GOPATH / bin added to the environment variable.
    Of course, also be placed in other directories, environment variables must be added, allowing the system to find protoc.exe
Linux:
    Download: protoc-3.3.0-linux-x86_64.zip or protoc-3.3.0-linux-x86_32.zip
    decompression, the protoc in the bin directory to the GOPATH / bin, GOPATH / bin added to the environment variable.
    If you like to compile and install, and can also download the source code to install itself, and finally the executable file to the environment variable.

2, get protobuf compiler plugins protoc-gen-go
    into the directory GOPATH
    run> go get -u github.com/golang/protobuf/protoc-gen-go

    If successful, it will generate protoc-gen-go.exe files in GOPATH / bin

 

3, create a file test.proto

// specified version 
// Note the wording proto3 and proto2 somewhat different 
syntax = "proto3"; 

// package name, is generated when go through protoc file 
Package Penalty for the Test; 

// phone type 
// enum type must be the first field 0 
enum {PhoneType 
    the HOME = 0; 
    WORK =. 1; 
} 

// Mobile 
Message phone { 
    PhoneType type =. 1; 
    String number = 2; 
} 

// al 
Message the person { 
    // number after the identification number indicates 
    Int32 ID =. 1; 
    String 2 = name; 
    // rEPEATED represents repeat 
    // there may be multiple phone 
    rEPEATED phone pHONES =. 3; 
} 

// Information Directory 
Message ContactBook { 
    rEPEATED the Person = persons. 1; 
} 

4. run the following commands 
 . protoc --go_out = * .proto

Test.pb.go will generate a file, the specific contents of the documents I will not screenshot.

 

5, using protobuf go in languages

package main;

import (
   "github.com/golang/protobuf/proto"
   "go_dev/kongji/proto/test"
   "io/ioutil"
   "os"
   "fmt"
)

func write() {
   p1 := &test.Person{
      Id:   1,
      Name: "小张",
      Phones: []*test.Phone{
         {test.PhoneType_HOME, "111111111"},
         {test.PhoneType_WORK, "222222222"},
      },
   };
   p2 := &test.Person{
      Id:   2,
      Name: "小王",
      Phones: []*test.Phone{
         {test.PhoneType_HOME, "333333333"},
         {test.PhoneType_WORK, "444444444"}    // create an address book   };
      }



   Book: = {} & test.ContactBook; 
   book.Persons = the append (book.Persons, P1); 
   book.Persons = the append (book.Persons, P2); 

   // data encoded 
   data, _: = proto.Marshal (book ) ; 
   // write the file data 
   ioutil.WriteFile ( "./ test.txt", data, os.ModePerm); 
} 

FUNC read () { 
   // read the data file 
   data, _: = ioutil.ReadFile ( " . /test.txt "); 
   Book: & test.ContactBook = {}; 
   // decoded data 
   proto.Unmarshal (data, Book); 
   for _, V: = Range book.Persons { 
      fmt.Println (V.ID, V. name); 
      for _, VV: = Range v.Phones { 
         fmt.Println (vv.Type, vv.Number); 
      } 
   } 
} 

FUNC main () { 
   Write ();
   read();
}