图文详解vue中proto文件的函数调用

//进入proto文件夹执行下列编译，将helloworld.proto替换为当前的.proto文件名
protoc -I=. helloworld.proto \
    --js_out=import_style=commonjs,binary:. \
    --grpc-web_out=import_style=commonjs,mode=grpcwebtext:.

service Greeter
{
  rpc AddEmployee(Employee) returns (EmployeeID) {} // 提交员工信息一元消息
}
//发送请求的数据类型结构
message Employee
{
  string name = 1;
  int32  age = 2;
}
//返回函数处理结果的类型结构
message EmployeeID
{
  int32 id = 1;
}

<el-button type="primary" @click="get_helloworld">
    hello_world
</el-button>

get_helloworld() {
    this.client = new GreeterClient("http://192.168.10.102:8181", null, null);

    // 创建请求参数并赋值
    var request = new Employee();
    request.setName("World");
    request.setAge(11);
    //  调用客户端相应的grpc方法，发送grpc请求，并接受后台发送回来的返回值
    this.client.addEmployee(request, {"my-service-header": "test_service"}, (err, response) => {
        if (err) {
            console.log(
                `Unexpected error for addEmployee: code = ${err.code}` +
                `, message = "${err.message}"`
            );
        } else {  
            console.log(response.getId());  //  打印返回的信息
        }
    });
},

rpc SelectAllCameras(SelectAllCamerasRequest) returns(SelectAllCamerasResponse){}
// 查询所有摄像机设备
message SelectAllCamerasRequest{
  int32     page_index = 1;
  int32     page_size = 2;
  string    condition = 3;
}
//返回查询结果，返回一个CameraInfo 的数组，CameraInfo 中又包含枚举类型CameraBrand
message SelectAllCamerasResponse{
  CodeErr   enumErrorNo = 1;
  repeated    CameraInfo cameraArray = 2;
}
// 摄像机信息
message CameraInfo{
  string            szCameraUID         = 1; // uid
  string            szName			        =	2; // 名称 东门口摄像机
  CameraBrand       enumCameraBrand			=	3; // 品牌
}
// 摄像机品牌
enum CameraBrand {
  DEFAULT_CAMERA_BRAND       = 0;
  HIKI_VISION                = 1;
  DAHUA                      = 2;
  UNIVIEW                    = 3;
}

import { device_register_serviceClient } from "../proto/device_manage_grpc_web_pb";
import { SelectAllCamerasRequest,} from "../proto/device_manage_pb";

 <el-table :data="caminfoTable"  ref="caminfoTable" >
   <el-table-column type="index" :index="table_index" align="center" label="序号" width="50"></el-table-column>
   <el-table-column prop="UID" label="UID" width="220" align="center">
     <template slot-scope="scope">
       <span>{{scope.row.getSzcamerauid()}}</span>
     </template>
   </el-table-column>
   <el-table-column prop="szName" label="相机名" width="150" align="center">
     <template slot-scope="scope">
       <span>{{scope.row.getSzname()}}</span>
     </template>
   </el-table-column>
   <el-table-column prop="enumCameraBrand" label="相机品牌" width="120" align="center">
     <template slot-scope="scope">
       <span>{{CameraBrand[scope.row.getEnumcamerabrand()].label}}</span>
     </template>
   </el-table-column>
</el-table>

//将返回结果赋值给一个数组变量
caminfoTable:[],
//摄像机品牌,这里的CameraBrand是用在添加相机信息时，下拉框选项内容的填充，此处也用来显示具体数据
CameraBrand: [
  {value:0, label:"默认"},
  { value: 1, label: "海*" },
  { value: 2, label: "大*" },
  { value: 3, label: "宇*" },
],

//获取相机设备的信息
get_camerainfo_data(){
   this.client = new device_register_serviceClient("http://192.168.10.102:8181", null, null);
   var request_selectallCam = new SelectAllCamerasRequest();
   request_selectallCam.setPageIndex(this.Pagination_queryInfo.page_index);
   request_selectallCam.setPageSize(this.Pagination_queryInfo.per_page);
   this.client.selectAllCameras(request_selectallCam,{"my-service-header": "dev_manage_service"},(err,response)=>{
     if(err){
        console.log(
           `Unexpected error for selectAllCameras: code = ${err.code}` +
             `, message = "${err.message}"`
         );
     }else{
         var caminfoList = response.getCameraarrayList();
         this.Pagination_total_pages=caminfoList.length;  //求取页码总数
         this.caminfoTable = caminfoList;  //将返回结果赋值给table数据表变量
     }
   });
   //调整页码的显示为第一页
   this.Pagination_queryInfo.page_index=1;
 },