Dapr 访问API

 Dapr 调用API

默认情况下，Dapr 挎斗 (SideCar) 依赖于网关来限制对其公共 API 的访问。 因此，请清除“为 HTTPS 配置”复选框：

打开 NuGet 包管理器，添加以下包

Dapr.AspNetCore

打开 Program.cs 文件并注入 DaprClient 服务：

// Add services to the container.
builder.Services.AddDaprClient();

调用服务：

using Dapr.Client;
using Microsoft.AspNetCore.Mvc.RazorPages;

namespace MyFrontEnd.Pages;

public class IndexModel : PageModel
{
    private readonly DaprClient _daprClient;

    public IndexModel(DaprClient daprClient)
    {
        _daprClient = daprClient;
    }

    public async Task OnGet()
    {
        var forecasts = await _daprClient.InvokeMethodAsync<IEnumerable<WeatherForecast>>(
            HttpMethod.Get,
            "MyBackEnd",
            "weatherforecast");

        ViewData["WeatherForecastData"] = forecasts;
    }
}

　　使用 DaprClient.InvokeMethodAsync 方法来调用 MyBackEnd（应用程序 ID） 服务的 weatherforecast 方法

 先后在每个项目上添加 Docker Compose ，最终Docker Compose文件如下：

version: '3.4'

services:
  myfrontend:
    image: ${DOCKER_REGISTRY-}myfrontend
    build:
      context: .
      dockerfile: MyFrontEnd/Dockerfile

  mybackend:
    image: ${DOCKER_REGISTRY-}mybackend
    build:
      context: .
      dockerfile: MyBackEnd/Dockerfile

　　将 Dapr 挎斗容器添加到 Compose 文件。 请谨慎地将 docker-compose.yml 文件的内容更新为与以下示例相匹配。 请密切注意格式和间距，切勿使用制表符。

version: '3.4'

services:
  myfrontend:
    image: ${DOCKER_REGISTRY-}myfrontend
    build:
      context: .
      dockerfile: MyFrontEnd/Dockerfile
    ports:
      - "53000:50001"

  myfrontend-dapr:
    image: "daprio/daprd:latest"
    command: [ "./daprd", "-app-id", "MyFrontEnd", "-app-port", "80" ]
    depends_on:
      - myfrontend
    network_mode: "service:myfrontend"

  mybackend:
    image: ${DOCKER_REGISTRY-}mybackend
    build:
      context: .
      dockerfile: MyBackEnd/Dockerfile
    ports:
      - "52000:50001"

  mybackend-dapr:
    image: "daprio/daprd:latest"
    command: [ "./daprd", "-app-id", "MyBackEnd", "-app-port", "80" ]
    depends_on:
      - mybackend
    network_mode: "service:mybackend"

　　更新后的文件中，我们分别为 myfrontend 和 mybackend 服务添加了 myfrontend-dapr 和 mybackend-dapr 挎斗。