微服务Ocelot基础配置

微服务-Ocelot基础配置

前言：如果还不了解网关的，可以去看下我之前的介绍，本文将介绍一下如何配置网关里面对应的swagger以及网关对应的跨域问题，以及Jwt配置，下面直接进入主题：

一、配置Jwt，实现步骤如下：首先添加JetBearer包

1. 添加JWT配置文件，下面有用到

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "AllowedHosts": "*",
  "JWTTokenOptions": {  //添加jwt配置文件
    "Audience": "http://localhost:5726",
    "Issuer": "http://localhost:5726",
    "SecurityKey": "MIGfMA0GCSqGSIb3DQ"
  }
}

2. 修改Program.cs类里面的方法：

备注：以往我们需要添加鉴权中间件，但是此处不能添加，会报错：中间件（app.UseAuthentication）

修改如下：

#region jwt校验  HS
JWTTokenOptions tokenOptions = new JWTTokenOptions();
builder.Configuration.Bind("JWTTokenOptions", tokenOptions);
string authenticationProviderKey = "UserGatewayKey";

builder.Services
.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)//Bearer Scheme
.AddJwtBearer(authenticationProviderKey, options =>
{
    options.TokenValidationParameters = new TokenValidationParameters
    {
        //JWT有一些默认的属性，就是给鉴权时就可以筛选了
        ValidateIssuer = true,//是否验证Issuer
        ValidateAudience = true,//是否验证Audience
        ValidateLifetime = true,//是否验证失效时间---默认还添加了300s后才过期
        ClockSkew = TimeSpan.FromSeconds(0),//token过期后立马过期
        ValidateIssuerSigningKey = true,//是否验证SecurityKey

        ValidAudience = tokenOptions.Audience,//Audience,需要跟前面签发jwt的设置一致
        ValidIssuer = tokenOptions.Issuer,//Issuer，这两项和前面签发jwt的设置一致
        IssuerSigningKey = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(tokenOptions.SecurityKey)),//拿到SecurityKey
    };
});
#endregion

3. 

//*****************************超时+限流+熔断+降级+Consul+Polly********************************
{
  "Routes": [
    {
      "DownstreamPathTemplate": "/api/{url}", //服务地址--url变量
      "DownstreamScheme": "http",
      "UpstreamPathTemplate": "/T/{url}", //网关地址--url变量
      "UpstreamHttpMethod": [ "Get", "Post" ],
      "UseServiceDiscovery": true,
      "ServiceName": "UserWebAPIService", //consul服务名称
      "LoadBalancerOptions": {
        "Type": "RoundRobin" //轮询      LeastConnection-最少连接数的服务器   NoLoadBalance不负载均衡
      },
      "RateLimitOptions": {
        "ClientWhitelist": [ "eleven", "seven" ], //白名单 ClientId 区分大小写
        "EnableRateLimiting": true,
        "Period": "5m", //1s, 5m, 1h, 1d
        "PeriodTimespan": 30, //多少秒之后客户端可以重试
        "Limit": 5 //统计时间段内允许的最大请求数量
      },
      "AuthenticationOptions": {
        "AuthenticationProviderKey": "UserGatewayKey", //UserGatewayKey 这个是我上面有用到的
        "AllowedScopes": [ "UserWebAPIService", "UserMinimalAPIService" ]
      },
      "RouteClaimsRequirement": {
        "Role": "Assistant"
      },
      "QoSOptions": {
        "ExceptionsAllowedBeforeBreaking": 3, //允许多少个异常请求
        "DurationOfBreak": 10000, // 熔断的时间，单位为ms
        "TimeoutValue": 2000 //单位ms 如果下游请求的处理时间超过多少则自如将请求设置为超时 默认90秒
      },
      "FileCacheOptions": {
        "TtlSeconds": 15,
        "Region": "UserCache" //可以调用Api清理
      }
    }
  ],
  "GlobalConfiguration": {
    "BaseUrl": "http://127.0.0.1:6299", //网关对外地址
    "ServiceDiscoveryProvider": {
      "Host": "127.0.0.1",
      "Port": 8500,
      "Type": "Consul" //由Consul提供服务发现
    },
    "RateLimitOptions": {
      "QuotaExceededMessage": "Too many requests, maybe later? 11", // 当请求过载被截断时返回的消息
      "HttpStatusCode": 666, // 当请求过载被截断时返回的http status
      "ClientIdHeader": "client_id" // 用来识别客户端的请求头，默认是 ClientId
    }
  }
}

一、配置网关里面对应的swagger

//*****************************服务器配置swagger********************************
{
  "Routes": [
    {
      "DownstreamPathTemplate": "/api/{url}", //服务地址--url变量
      "DownstreamScheme": "http",
      "DownstreamHostAndPorts": [
        {
          "Host": "192.168.3.230",
          "Port": 5030 //服务端口
        }
      ],
      "UpstreamPathTemplate": "/T5030/{url}", //网关地址--url变量
      "UpstreamHttpMethod": [ "Get", "Post" ]
    },
    {
      "UpstreamPathTemplate": "/webapi/swagger/v1/swagger.json",
      "UpstreamHttpMethod": [ "Get" ],
      "DownstreamHostAndPorts": [
        {
          "Host": "192.168.3.230",
          "Port": 5030 //服务端口
        }
      ],
      "DownstreamPathTemplate": "/swagger/v1/swagger.json",
      "DownstreamScheme": "http"
    },
    {
      "UpstreamPathTemplate": "/webapiV2/swagger/v2/swagger.json",
      "UpstreamHttpMethod": [ "Get" ],
      "DownstreamHostAndPorts": [
        {
          "Host": "192.168.3.230",
          "Port": 5030 //服务端口
        }
      ],
      "DownstreamPathTemplate": "/swagger/v1/swagger.json",
      "DownstreamScheme": "http"
    }
  ]
}

二、网关对应的跨域

////*****************************单地址+跨域********************************
//{
//  "Routes": [
//    {
//      "DownstreamPathTemplate": "/api/{url}", //服务地址--url变量
//      "DownstreamScheme": "http",
//      "DownstreamHeaderTransform": {
//        "Access-Control-Allow-Origin": "http://localhost:8070", //不存在就添加
//        "Access-Control-Allow-Methods": "*",
//        "Access-Control-Allow-Headers": "*"
//      },
//      "DownstreamHostAndPorts": [
//        {
//          "Host": "192.168.3.230",
//          "Port": 5030 //服务端口
//        }
//      ],
//      "UpstreamPathTemplate": "/T5030/{url}", //网关地址--url变量
//      "UpstreamHttpMethod": [ "Get", "Post", "Put", "PATCH", "Delete", "Options" ]
//    }
//  ]
//}

谢谢学习！！！共同进步，如有疑问，请留言~