public override async Task OnRequestAsync(ApiRequestContext context)
{
await Task.CompletedTask;
IServiceProvider sp = context.HttpContext.ServiceProvider;
HostProvider hostProvider = sp.GetRequiredService <HostProvider>();
//服务名也可以在接口配置时挂在Properties中
string host = hostProvider.ResolveService(this.Name);
HttpApiRequestMessage requestMessage = context.HttpContext.RequestMessage;
//和原有的Uri组合并覆盖原有Uri
//并非一定要这样实现，只要覆盖了RequestUri,即完成了替换
requestMessage.RequestUri = requestMessage.MakeRequestUri(new Uri(host));
}
public void MakeRequestUriTest()
{
var request = new HttpApiRequestMessage();
var uri = request.MakeRequestUri(new Uri("a", UriKind.RelativeOrAbsolute));
Assert.Equal("a", uri.OriginalString);
request = new HttpApiRequestMessage();
uri = request.MakeRequestUri(new Uri("http://a.com", UriKind.RelativeOrAbsolute));
Assert.Equal("http://a.com", uri.OriginalString);
request = new HttpApiRequestMessage();
uri = request.MakeRequestUri(new Uri("http://a.com/a", UriKind.RelativeOrAbsolute));
Assert.Equal("http://a.com/a", uri.OriginalString);
}
public override Task OnRequestAsync(ApiRequestContext context)
{
var options = context.HttpContext.HttpApiOptions;
//获取注册时为服务配置的服务名
options.Properties.TryGetValue("serviceName", out object serviceNameObj);
string serviceName = serviceNameObj as string;
IServiceProvider sp = context.HttpContext.ServiceProvider;
HostProvider hostProvider = sp.GetRequiredService <HostProvider>();
string host = hostProvider.ResolveService(serviceName);
HttpApiRequestMessage requestMessage = context.HttpContext.RequestMessage;
//和原有的Uri组合并覆盖原有Uri
//并非一定要这样实现，只要覆盖了RequestUri,即完成了替换
requestMessage.RequestUri = requestMessage.MakeRequestUri(new Uri(host));
return(Task.CompletedTask);
}