前言
架構圖
理想中的架構長的像這樣
User可以透過作為Geteway用途API,去訪問到其他API
照著這篇文章實作以後,達成的結構會像這樣
建立ASP.NET Core Web API (1/2)
新增專案,其名為CompanyManagement
建立方式如下
新增CompanyModel.cs
建立方式如下
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namespace CompanyManagement
{
public class CompanyModel
{
public int CompanyID { get; set; }
public string CompanyName { get; set; }
public string CompanyClass { get; set; }
public DateTime DateofJoining { get; set; }
}
}
新增CompanyServiceController.cs
建立方式如下
設定 API Controller
API Controller的function如下
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using Microsoft.AspNetCore.Mvc;
namespace CompanyManagement.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class CompanyServiceController : ControllerBase
{
// GET: api/<StudentAdmissionController>
[HttpGet]
public IEnumerable<CompanyModel> Get()
{
CompanyModel admissionobj1 = new CompanyModel();
CompanyModel admissionobj2 = new CompanyModel();
admissionobj1.CompanyID = 1;
admissionobj1.CompanyName = "HI";
admissionobj1.CompanyClass = "X";
admissionobj1.DateofJoining = DateTime.Now;
admissionobj2.CompanyID = 2;
admissionobj2.CompanyName = "Jay";
admissionobj2.CompanyClass = "V";
admissionobj2.DateofJoining = DateTime.Now;
List<CompanyModel> listofobj = new List<CompanyModel>
{
admissionobj1,
admissionobj2
};
return listofobj;
}
}
}
執行API顯示結果
建立ASP.NET Core Web API (2/2)
新增專案，其名為EmpDetail
新增專案
### 新增EmpDetail.cs 
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namespace EmpDetail
{
public class EmpModel
{
public int EmpID { get; set; }
public string EmpName { get; set; }
public double AttendencePercentage { get; set; }
}
}
新增EmpServiceController.cs
設定 API Controller
API Controller的function如下
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using Microsoft.AspNetCore.Mvc;
namespace EmpDetail.Controllers
{
[Route("api/[controller]")]
[ApiController]
public class EmpServiceController : ControllerBase
{
[HttpGet]
public IEnumerable<EmpModel> Get()
{
EmpModel attendanceObj1 = new EmpModel();
EmpModel attendanceObj2 = new EmpModel();
attendanceObj1.EmpID = 1;
attendanceObj1.EmpName = "Adam";
attendanceObj1.AttendencePercentage = 83.02;
attendanceObj2.EmpID = 2;
attendanceObj2.EmpName = "Brad";
attendanceObj2.AttendencePercentage = 71.02;
List<EmpModel> listObj = new List<EmpModel>
{
attendanceObj1,
attendanceObj2
};
return listObj;
}
}
}
執行API顯示結果
設定「同時啟動多個專案」
建立專案「APIGeteway」
在APIGeteway專案中,安裝Ocelot
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NuGet\Install-Package Ocelot -Version 18.0.0
新增Ocelot.json
設定Ocelot.json
Ocelot.json的內容如下
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{
"Routes": [
{
"DownstreamPathTemplate": "/api/CompanyService",
"DownstreamScheme": "https",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 7185
}
],
"UpstreamPathTemplate": "/apigateway/CompanyAPI",
"UpstreamHttpMethod": [ "GET", "PUT", "POST" ]
},
{
"DownstreamPathTemplate": "/api/EmpService",
"DownstreamScheme": "https",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 7252
}
],
"UpstreamPathTemplate": "/apigateway/EmpAPI",
"UpstreamHttpMethod": [ "GET", "PUT", "POST" ]
}
]
}
設定啟動時,根據JSON載入設定
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using Ocelot.DependencyInjection;
using Ocelot.Middleware;
var builder = WebApplication.CreateBuilder(args);
// Add services to the container.
builder.Services.AddCors(options => {
options.AddPolicy("CORSPolicy", builder => builder.AllowAnyMethod().AllowAnyHeader().AllowCredentials().SetIsOriginAllowed((hosts) => true));
});
builder.Services.AddControllers();
// Learn more about configuring Swagger/OpenAPI at https://aka.ms/aspnetcore/swashbuckle
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();
builder.Configuration.AddJsonFile("Ocelot.json", optional: false, reloadOnChange: true);
builder.Services.AddOcelot(builder.Configuration);
var app = builder.Build();
// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
app.UseSwagger();
app.UseSwaggerUI();
}
app.UseCors("CORSPolicy");
app.UseHttpsRedirection();
app.UseAuthorization();
app.MapControllers();
await app.UseOcelot();
app.Run();
設定多專案同時啟動
Ocelot.json設定對照
Microservice架構DEMO成功的顯示結果
執行專案
可以從APIGeteway的網址調用到其他專案的API
