前面介绍了 YARP 通过配置文件的方式配置代理转发（传送门），而众所周知，微软的一贯作风就是能通过配置文件做的事情，通过编码的方式也能实现！YARP 也不例外，废话不多说，直接上代码！
首先，参照官方文档，我们先新建一个 InMemoryConfigProvider 类，并且继承 IProxyConfigProvider 接口，类里面还包含了一个 IProxyConfig 的类，别看漏了噢！
这里多嘴一下，下面的代码出现了 volatile 关键字，介绍一下它：volatile 是 C# 中用于控制同步的关键字，其意义是针对程序中一些敏感数据，不允许多线程同时访问，保证数据在任何访问时刻，最多有一个线程访问，以保证数据的完整性，volatile 是修饰变量的修饰符。
public class InMemoryConfigProvider : IProxyConfigProvider
{
private volatile InMemoryConfig _config;
public InMemoryConfigProvider(IReadOnlyList routes, IReadOnlyList clusters)
{
_config = new InMemoryConfig(routes, clusters);
}
public IProxyConfig GetConfig() => _config;
public void Update(IReadOnlyList routes, IReadOnlyList clusters)
{
var oldConfig = _config;
_config = new InMemoryConfig(routes, clusters);
oldConfig.SignalChange();
}
private class InMemoryConfig : IProxyConfig
{
private readonly CancellationTokenSource _cts = new();
public InMemoryConfig(IReadOnlyList routes, IReadOnlyList clusters)
{
Routes = routes;
Clusters = clusters;
ChangeToken = new CancellationChangeToken(_cts.Token);
}
public IReadOnlyList Routes { get; }
public IReadOnlyList Clusters { get; }
public IChangeToken ChangeToken { get; }
internal void SignalChange()
{
_cts.Cancel();
}
}
}
然后添加一个扩展 InMemoryConfigProviderExtensions
public static class InMemoryConfigProviderExtensions
{
public static IReverseProxyBuilder LoadFromMemory(this IReverseProxyBuilder builder, IReadOnlyList routes, IReadOnlyList clusters)
{
builder.Services.AddSingleton[I](new InMemoryConfigProvider(routes, clusters));
return builder;
}
}
接下来就是写配置了，我个人还是喜欢在配置文件中写，但是有动态配置需求的话，又不想登录服务器编辑 appsetting 文件，通过编码的方式确实更为方便，将配置写进库或者其它存储方式里面，那将是随心所欲啊！上代码:
Program.cs
var routes = new[]
{
new RouteConfig()
{
RouteId = "admin",
ClusterId = "admin",
Match = new RouteMatch
{
Hosts = new string[] {"test1.ysmc.net.cn" },
Path = "{**catch-all}"
}
},
new RouteConfig()
{
RouteId = "blazor",
ClusterId = "blazor",
Match = new RouteMatch
{
Hosts = new string[] {"test2.ysmc.net.cn" },
Path = "{**catch-all}"
}
}
};
var clusters = new[]
{
new ClusterConfig()
{
ClusterId = "admin",
LoadBalancingPolicy = "RoundRobin",
Destinations = new Dictionary(StringComparer.OrdinalIgnoreCase)
{
{ "admin", new DestinationConfig() { Address = "https://admin.blazor.zone" } }
}
},
new ClusterConfig()
{
ClusterId = "blazor",
LoadBalancingPolicy = "RoundRobin",
Destinations = new Dictionary(StringComparer.OrdinalIgnoreCase)
{
{ "blazor", new DestinationConfig() { Address = "https://www.blazor.zone" } }
}
}
};
builder.Services.AddReverseProxy().LoadFromMemory(routes, clusters);
上面的配置代码，跟配置文件方式的节点和属性，都是对应的，照着写就是了
"ReverseProxy": {
"Routes": {
"admin": {
"ClusterId": "admin",
"Match": {
"Hosts": [ "test1.ysmc.net.cn" ],
"Path": "{**catch-all}"
}
},
"blazor": {
"ClusterId": "blazor",
"Match": {
"Hosts": [ "test2.ysmc.net.cn" ],
"Path": "{**catch-all}"
}
}
},
"Clusters": {
"admin": {
"LoadBalancingPolicy": "RoundRobin",
"Destinations": {
"admin": {
"Address": "https://admin.blazor.zone/"
}
}
},
"blazor": {
"LoadBalancingPolicy": "RoundRobin",
"Destinations": {
"blazor": {
"Address": "https://www.blazor.zone/"
}
}
}
}
}
最终效果还是依旧的完美，感谢大佬的观看，谢谢！
2022092410471637.png
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发表于 2023-5-4 11:30:50