public static void ConfigureSameNodeHandler(this IApplicationBuilder app, SameNodeCache sameNodeList, RoundRobin roundRobin)
{
app.Use(async(context, next) =>
{
// Getting ApiKey from the request stream (defined in ApiAuthenticationHandler)
//
var apiKey = context.Items["ProjectApiKey"];
var ip = context.GetClientIp();
var cacheKey = string.Format("{0}-{1}", apiKey, ip);
var sameNodeRequest = sameNodeList.GetRequest(cacheKey);
string currentNodeHost = null;
// Is Cached
//
if (sameNodeRequest != null)
{
currentNodeHost = sameNodeRequest.Host;
}
else
{
currentNodeHost = roundRobin.Next().Uri.Host;
sameNodeList.SaveRequest(cacheKey, currentNodeHost);
}
// Save in request stream for next middleware
//
context.Items["NodeHost"] = currentNodeHost;
// Call the next delegate/middleware in the pipeline
await next();
});
}
public void Configure(IApplicationBuilder app)
{
var roundRobin = new RoundRobin
{
new UpstreamHost("http://localhost:5001", weight: 1),
new UpstreamHost("http://localhost:5002", weight: 2)
};
app.RunProxy(
async context =>
{
var host = roundRobin.Next();
var response = await context
.ForwardTo(host)
.ApplyXForwardedHeaders()
.Execute();
// failover
if (response.StatusCode == HttpStatusCode.ServiceUnavailable)
{
return(await context
.ForwardTo(host)
.ApplyXForwardedHeaders()
.Execute());
}
return(response);
});
}
public void Configure(IApplicationBuilder app)
{
var roundRobin = new RoundRobin
{
new UpstreamHost("http://localhost:5001/", weight: 1),
new UpstreamHost("http://localhost:5002/", weight: 2)
};
app.RunProxy(
async context =>
{
var host = roundRobin.Next();
return(await context
.ForwardTo(host)
.Send());
});
}
public void Configure(IApplicationBuilder app)
{
var roundRobin = new RoundRobin
{
"http://localhost:5001",
"http://localhost:5002"
};
app.RunProxy(
context =>
{
var host = roundRobin.Next();
return(context
.ForwardTo(host)
.AddXForwardedHeaders()
.Send());
});
}
