Protobuf-3.6.1 Installation and Golang use

Write in front

PROTOBUF is a data description language developed by Google, capable of serializing structured data for data storage, communication protocols, and official versions that support Go, C + +, Java, Python, and Community editions to support more languages.
The following advantages are with respect to JSON and XML:
Small Size: Message size requires only 1/10 ~ 1⁄3 of XML
faster: 20 ~ 100 times faster parsing speed than XML
High Integration : Using the Protobuf compiler, you can generate data access code that is easier to use in programming
better compatibility : One of the principles of protobuf design is to be able to be well-compatible with down or up

Installation

1. Get the Protobuf compiler from Https://github.com/google/protobuf/releases Protoc

wget https://github.com/google/protobuf/releases/download/v3.6.1/protobuf-all-3.6.1.tar.gz tar zxvf protobuf-all-3.6.1.tar.gzcd protobuf-3.6.1./configuremakemake installprotoc   -hprotoc --version

Problems encountered and their solutions
[1] libprotoc.so.17:cannot open Shared object file:no such file or directory

bjlvxin:~/下载/protobuf-3.6.1$ protoc --versionprotoc: error while loading shared libraries: libprotoc.so.17: cannot open shared object file: No such file or directory解决方案：执行：export LD_LIBRARY_PATH=/usr/local/libbjlvxin:~/下载/protobuf-3.6.1$ export LD_LIBRARY_PATH=/usr/local/lib/  bjlvxin:~/下载/protobuf-3.6.1$ protoc   --versionlibprotoc 3.6.1

2. Obtain the PROTOBUF plug-in protoc-gen-go provided by GOPROTOBUF (placed under $GOPATH/bin, $GOPATH/bin should be added to the PATH environment variable so PROTOC can find protoc-gen-go)
This plugin is used by PROTOC to compile the. proto file as a Golang source file, which allows you to use the message defined in the. proto file.

go get github.com/golang/protobuf/protoc-gen-gocd $GOPATH/src/github.com/golang/protobuf/protoc-gen-gogo buildgo installvi ～/.bashrc 将$GOPATH/bin 加入环境变量:export PATH=$PATH:$GOPATH/binsource ～/.bashrc

3. Get the support library provided by GOPROTOBUF, including functions such as encoding (marshaling), decoding (unmarshaling), etc.

go get github.com/golang/protobuf/protocd $GOPATH/src/github.com/golang/protobuf/protogo buildgo install

Use

This article uses Golang to PROTOBUF.
1. Create a new Golang project through Goland:

2. Write the Person.proto in the example package

syntax = "proto3";package example;//  person 会生成 Person 命名的结构体message person {                    int32 id = 1;                    string name = 2;}//  all_person 会按照驼峰规则自动生成名为AllPerson 的结构体message all_person {                        repeated person Per = 1;}

3. Enter the proto directory of the Protobuf-golang project and use PROTOC to compile the Person.proto

protoc --go_out=. person.proto

After execution, the corresponding go file will be generated in the Proto directory: Person.pb.go
4. Main.go documents for the preparation of the project:

/*Copyright 2018 JD-Tigercreated by lvxin  at 18-8-13 下午12:03*/package mainimport (    example "github.com/lvxin1986/protobuf-golang/proto"    "log"    "github.com/golang/protobuf/proto"    "fmt")func main() {    // 为 AllPerson 填充数据    //使用protobuf的封装类型定义    p1 := example.Person{        Id:*proto.Int32(1),        Name:*proto.String("lvxin"),    }    //使用golang的原始类型定义    p2 := example.Person{        Id:2,        Name:"gopher",    }    all_p := example.AllPerson{        Per:[]*example.Person{&p1, &p2},    }    // 对数据进行序列化    data, err := proto.Marshal(&all_p)    if err != nil {        log.Fatalln("Mashal data error:", err)    }    // 对已经序列化的数据进行反序列化    var target example.AllPerson    err = proto.Unmarshal(data, &target)    if err != nil{        log.Fatalln("UnMashal data error:", err)    }    for k,v := range target.Per {        fmt.Println("person[",k,"]:",v.Name)    }}

5. Run directly after development:

6. The results of the operation are as follows:

GOROOT=/software/servers/go1.10.3 #gosetupGOPATH=/sourcecode/go/work #gosetup/software/servers/go1.10.3/bin/go build -i -o /tmp/___go_build_main_go /sourcecode/go/work/src/github.com/lvxin1986/protobuf-golang/main.go #gosetup/tmp/___go_build_main_go #gosetupperson[ 0 ]: lvxinperson[ 1 ]: gopherProcess finished with exit code 0

Finish the call.

Reference documents

Https://www.jianshu.com/p/1a3f1c3031b5
https://segmentfault.com/a/1190000010477733
Http://lihaoquan.me/2017/6/29/how-to-use-protobuf.html
Https://www.pythonxyz.com/10038-install-protobuf-in-ubuntu.xyz