ASP.NETCore为Ocelot网关配置Swagger
1.前言
前端与后端的联系更多是通过API接口对接,API文档变成了前后端开发人员联系的纽带,开始变得越来越重要,而Swagger就是一款让你更好的书写规范API文档的框架。在Ocelot Swagger项目示例中,通过APIGateway项目路由配置网关、上下游服务Swagger。对解决方案中的示例APIServiceA、APIServiceB项目Get方法进行配置,文件配置具体代码如下:
{
"Routes": [
{
//下游服务地址
"DownstreamPathTemplate": "/swagger/v1/swagger.json",
//传输协议
"DownstreamScheme": "http",
//下游主机跟端口号(数组)
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 9001
}
],
//上游服务地址
"UpstreamPathTemplate": "/a/swagger/v1/swagger.json",
//上游服务Http端口号(数组)
"UpstreamHttpMethod": [ "Get", "POST" ]
},
{
//下游服务地址
"DownstreamPathTemplate": "/swagger/v1/swagger.json",
//传输协议
"DownstreamScheme": "http",
//上游服务Http端口号(数组)
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 9002
}
],
//上游服务地址
"UpstreamPathTemplate": "/b/swagger/v1/swagger.json",
//上游服务Http端口号(数组)
"UpstreamHttpMethod": [ "Get", "POST" ]
},
{
"DownstreamPathTemplate": "/a",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 9001
}
],
"UpstreamPathTemplate": "/a",
"UpstreamHttpMethod": [ "Get" ]
},
{
"DownstreamPathTemplate": "/b",
"DownstreamScheme": "http",
"DownstreamHostAndPorts": [
{
"Host": "localhost",
"Port": 9002
}
],
"UpstreamPathTemplate": "/b",
"UpstreamHttpMethod": [ "Get" ]
}
],
"GlobalConfiguration": {
"RequestIdKey": "OcRequestId",
"AdministrationPath": "/administration"
}
}
2.项目演示
2.1APIGateway项目
添加Ocelot、Swagger服务注入:
public static IWebHost BuildWebHost(string[] args) =>
WebHost.CreateDefaultBuilder(args)
.UseUrls("http://*:9000")
.ConfigureAppConfiguration((hostingContext, config) =>
{
config
.SetBasePath(hostingContext.HostingEnvironment.ContentRootPath)
.AddJsonFile("ocelot.json")
.AddEnvironmentVariables();
})
.ConfigureServices(s =>
{
//添加Ocelot服务;
s.AddOcelot();
s.AddMvc();
//添加Swagger服务;
s.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "GW", Version = "v1" });
var basePath = PlatformServices.Default.Application.ApplicationBasePath;
var xmlPath = Path.Combine(basePath, "APIGateway.xml");
c.IncludeXmlComments(xmlPath);
});
})
.Configure(a =>
{
//使用Swagger
a.UseSwagger().UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/a/swagger/v1/swagger.json", "APIServiceA");
c.SwaggerEndpoint("/b/swagger/v1/swagger.json", "APIServiceB");
});
//使用Ocelot;
a.UseOcelot().Wait();
})
.Build();
2.2APIServiceA项目
Startup添加Swagger服务注入:
ConfigureServices:
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "APIServiceA", Version = "v1" });
var basePath = PlatformServices.Default.Application.ApplicationBasePath;
var xmlPath = Path.Combine(basePath, "APIServiceA.xml");
c.IncludeXmlComments(xmlPath);
});
Configure:
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "APIServiceA");
});
添加一个Get方法,对应APIGateway项目的路由上下游配置,具体代码如下:
/// <summary>
/// Values controller.
/// </summary>
[Route("a")]
public class ValuesController : Controller
{
// GET api/values
/// <summary>
/// Get values.
/// </summary>
/// <returns>The get.</returns>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
}
2.3APIServiceB项目
Startup添加Swagger服务注入:
ConfigureServices:
services.AddSwaggerGen(c =>
{
c.SwaggerDoc("v1", new OpenApiInfo { Title = "APIServiceB", Version = "v1" });
var basePath = PlatformServices.Default.Application.ApplicationBasePath;
var xmlPath = Path.Combine(basePath, "APIServiceB.xml");
c.IncludeXmlComments(xmlPath);
});
Configure:
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "APIServiceB");
});
添加一个Get方法,对应APIGateway项目的路由上下游配置,具体代码如下:
/// <summary>
/// Values controller.
/// </summary>
[Route("b")]
public class ValuesController : Controller
{
// GET api/values
/// <summary>
/// Get values.
/// </summary>
/// <returns>The get.</returns>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value3", "value4" };
}
}
2.4项目运行
注:如果想把Swagger注释警告提示取消,可以在对应项目文件.csproj的PropertyGroup节点上加入<NoWarn>$(NoWarn);1591</NoWarn>这一行代码。
输入dotnet run --project 项目路径\项目文件.csproj把三个项目启动起来,通过在浏览器分别打开APIServiceA与APIServiceB两个站点上游服务Swagger地址,会看到如下信息:
APIServiceA:
APIServiceB:
通过网关的路由配置,把Swagger集成到Ocelot中,统一入口管理,通过网关入口我们就能打开不同下游服务的Swagger。
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