摘要

• 本文内容基于laravel5.4.*框架
• Protocol Buffer学习笔记(Java&NodeJS)

项目中引入proto的依赖

在项目根目录下执行如下命令，composer会自动下载最新版本，目前是"google/protobuf": "^3.5"
composer require "google/protobuf"

准备proto文件

• 注意事项参考：PHP Generated Code
• proto示例文件参考Protocol Buffer学习笔记(Java&NodeJS)，这里注意去掉其中的required、optional，因为这里要求语法严格遵循proto3，不能在属性前出现required、optional，所以文件顶端要明确syntax = "proto3";，另外增加package配置为package app.proto;

生成proto对应的php文件

• 将准备好的proto文件放到laravel根目录下，并在根目录下执行如下命令
  protoc --php_out=. OTIpcDef.proto

• 此时会在app目录下自动创建Proto目录，并在其目录下生成对应的php类文件

• 同时在根目录下会生成GPBMetadata\OTIpcDef.php

• 由于laravel要求所有的class都必须在app目录下，所以需要移动GPBMetadata目录到app目录下，同时修改对应的namespace 为namespace App\GPBMetadata;;

• 同时需要修改app\Proto下的各个class的构造方法

public function __construct() {
    \App\GPBMetadata\OTIpcDef::initOnce();
    parent::__construct();
}

php中使用protobuf

创建ProtoController

namespace App\Http\Controllers;
use App\Proto\BaseInfoCompany;
use App\Helper\HttpUtils;

class ProtoController extends Controller
{
    /**
     * ProtoController constructor.
     */
    public function __construct()
    {
    }
}

1.主动获取protobuf数据

public function build_proto_data()
    {
        $baseInfoCompany  = new BaseInfoCompany();
        $baseInfoCompany->setAddress(110011);
        $baseInfoCompany->setCompanyId("companyId");
        $baseInfoCompany->setCompanyName("companyName中文");
        $baseInfoCompany->setIdentifier("identifier");
        $baseInfoCompany->setBusinessScope("BusinessScope");
        $baseInfoCompany->setContactAddress("ContactAddress");
        $baseInfoCompany->setEconomicType("EconomicType");
        $baseInfoCompany->setRegCapital("RegCapital");
        $baseInfoCompany->setLegalName("LegalName");
        $baseInfoCompany->setLegalID("LegalID");
        $baseInfoCompany->setLegalPhone("LegalPhone");
        $baseInfoCompany->setState(0);
        $baseInfoCompany->setFlag(1);
        $baseInfoCompany->setUpdateTime(20180226121212);
        // $protostr = $baseInfoCompany->serializeToString();
        //生成json
        $protostr = $baseInfoCompany->serializeToJsonString();
        return $protostr;
    }

public function receive_proto_data(){       
        $protoData = file_get_contents("http://localhost:83/proto/build");     
        try {   
            $baseInfoCompany = new BaseInfoCompany();
//            $baseInfoCompany->mergeFromString($protoData);
            $baseInfoCompany->mergeFromJsonString($protoData);
            echo $baseInfoCompany->getCompanyName();

            return $baseInfoCompany->serializeToJsonString();
        } catch (Exception $ex) {
            die('something is wrong');
        }
    }

2.被动接收protobuf数据

public function send_proto_data(){
        $data = $this->build_proto_data();
        $receive = HttpUtils::request_by_curl("http://localhost:83/proto/receive",$data);
        echo $receive;
    }

public function receive_proto_data(){
        // $protoData = file_get_contents("http://localhost:83/proto/build");   
        $protoData = $_POST["data"];
        try {       
            $baseInfoCompany = new BaseInfoCompany();
//            $baseInfoCompany->mergeFromString($protoData);
            $baseInfoCompany->mergeFromJsonString($protoData);
            echo $baseInfoCompany->getCompanyName();
            return $baseInfoCompany->serializeToJsonString();        
        } catch (Exception $ex) {
            die('something is wrong');
        }
    }

• 这里用到一个工具类App\Helper\HttpUtils

namespace App\Helper;
class HttpUtils
{

    public static function request_by_curl($remote_server, $post_string) {
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $remote_server);
        curl_setopt($ch, CURLOPT_POSTFIELDS, 'data=' . $post_string);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
        curl_setopt($ch, CURLOPT_TIMEOUT, 1);//异步处理
        $data = curl_exec($ch);
        if (curl_errno($ch)) { //响应错误的处理
        }
        curl_close($ch);
        return $data;
    }
}