public async Task doHttpPutWithQueryString()
{
var resolver = new HttpRouteResolver();
var path = "api/models/";
var sentModel = Model.getRandomModel();
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Put);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new HttpAddSetHeaderMatcher("Content-Type", "application/json"),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path, "?ModelId=", sentModel.ModelId), sentModel.asJsonStream());
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
var modelReturn = JsonConvert.DeserializeObject <ModelControllerResponseContent>(responseString);
Assert.AreEqual(sentModel.ModelId, modelReturn.Models[0].ModelId);
Assert.AreEqual(string.Concat(srv02Address, path, "?ModelId=", sentModel.ModelId), modelReturn.RequestUri);
}
public async Task BasicWiring()
{
var resolver = new HttpRouteResolver();
/*
* route from bing to microsoft
*
*/
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher("www.microsoft.com"),
new HostAddressMatcher("www.bing.com", StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync("http://www.bing.com");
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
Trace.WriteLine(await responseMessage.Content.ReadAsStringAsync());
}
public async Task MatchNamePortAndSetHostAddress()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task MatchOnContextUsingCustomValuePredicate()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
var customKey = "MyCustomContextKey";
var customValue = "MyCustomValue";
// this pluming is to extract which host are we going to use to route
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
// whenever our custom predicate return true we will route the traffic to server 2
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new ContextCustomValueMatcher(customKey, (k, v) =>
{
var ar = v as string[];
if (null == ar)
{
return(false);
}
if (ar.Length == 3)
{
return(true);
}
return(false);
}));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var context = new Dictionary <string, object>();
// context contains a custom value that is a string array
context.Add(customKey, new string[] { customValue, customValue, customValue });
var results = await router.RouteAsync(string.Concat(srv01Address, path), context);
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task FastestRoute()
{
var resolver = new HttpRouteResolver();
/*
* anything point to http://localhost:9001
* will be routed as fastest route to
* http://locahost:9002 or http://locahost:9003
*
* With HttpGet + Same path
*
*/
var path = "api/randomdelay/0";
var trytimes = 5;
var firstMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
firstMatcher.Chain(new SetAddressListMatcher(new string[] { Srv01HostNamePort, Srv02HostNamePort, Srv03HostNamePort }, false, ContextRoutingType.FastestRoute),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(firstMatcher, 0);
var router = new HttpRouter(resolver);
var resultsList = new List <HttpRoutingResult>(trytimes);
var responsesList = new HashSet <string>();
// call as many as try times
for (var i = 1; i <= trytimes; i++)
{
resultsList.Add(await router.RouteAsync(string.Concat(srv01Address, path)));
}
foreach (var result in resultsList)
{
var responseMessage = await result.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
responsesList.Add(responseString);
}
// server returns the address
// in the response
// any count > 1 means that router is routing to more than one end point
Assert.AreEqual(true, responsesList.Count > 1);
}
private async Task <HttpRouter> GetRouter()
{
var resolver = new HttpRouteResolver();
var headMatcher = new HttpFromOwinReqCtxMatcher(); // copy methods and headers as is
//using my custom SaaS tenant matcher address matcher
headMatcher.Chain(new MatchHostAddressForTenant());
await resolver.AddMatcherAsync(headMatcher, 0);
return(new HttpRouter(resolver));
}
// creates an OWIN pipeline that has the router embeded
// in it
private async Task <HttpRouter> GetRouter()
{
var resolver = new HttpRouteResolver();
var headMatcher = new HttpFromOwinReqCtxMatcher(); // copy methods and headers as is
// route from Owin Server Listening Address to server 2
headMatcher.Chain(new SetAddressListMatcher(RouterTestSuit.Srv02HostNamePort),
new HostAddressMatcher(RouterTestSuit.OwinRouterSrvHostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
return(new HttpRouter(resolver));
}
public async Task AggregateMultipleEndPoints()
{
var resolver = new HttpRouteResolver();
/*
* anything point to http://localhost:9001
* will be routed as be aggregated from multiple backend endpoints
*
* With HttpGet + Same path
*
*/
var path = "api/randomdelay/0";
var Hosts = 3;
var firstMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
firstMatcher.Chain(new SetAddressListMatcher(new string[] { Srv01HostNamePort, Srv02HostNamePort, Srv03HostNamePort }, false, ContextRoutingType.ScatterGather),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(firstMatcher, 0);
var router = new HttpRouter(resolver);
var resultsList = new List <HttpRoutingResult>(Hosts);
var responsesList = new HashSet <string>();
// call as many as try times
var allResults = await router.RouteAsync(string.Concat(srv01Address, path));
foreach (var result in await allResults.ResultAsAsync <List <HttpResponseMessage> >())
{
var responseString = await result.Content.ReadAsStringAsync();
responsesList.Add(responseString);
}
Assert.IsTrue(responsesList.Count == 3); // all hosts in the system
}
public async Task RetryThenRoute()
{
var resolver = new HttpRouteResolver();
/*
* Attempt to an address (that will fail), then retry after 10 ms, if still failing
* it will route to a different server.
*/
var path = "api/values/0";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher("fail"), // point to an address that does not exist (i really hope that you have a machine on your network named "fail")
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var headStrategy = new RetryAfterStrategy(10);
// chain
headStrategy.ThenRouteToHost(Srv02HostNamePort);
router.DefaultContextExecuteStrategy = headStrategy;
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task MatchUsingCustomPredicate()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
// whenever our custom predicate return true we will route the traffic to server 2
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new PredicateMatcher((routingctx, address, ctx, body) =>
{
return(true);
}));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var context = new Dictionary <string, object>();
// context contains a custom value that is a string array
var results = await router.RouteAsync(string.Concat(srv01Address, path), context);
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task MatchOnIIFMatcher()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
var customKey = "MyCustomContextKey";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
// Whenever a context contains a key we will route all the traffic to server02
headMatcher.Chain(
new IIFMatcher(
new ContextContainsKeyMatcher(customKey, StringMatchType.Exact),
new SetAddressListMatcher(Srv02HostNamePort),
new SetAddressListMatcher(Srv03HostNamePort)
)
);
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv03Address, path), responseString);
}
public async Task MatchOnContextContainsKeyWithStringValue()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
var customKey = "MyCustomContextKey";
var customValue = "MyCustomValue";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new ContextValueStringMatcher(customKey, customValue, StringMatchType.Exact));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var context = new Dictionary <string, object>();
context.Add(customKey, customValue);
var results = await router.RouteAsync(string.Concat(srv01Address, path), context);
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task RemoveHeader()
{
var resolver = new HttpRouteResolver();
var path = "api/Headers/0";
var customHeaderName = "customHeader";
var customHeaderValue = "customHeaderValue";
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new HttpRemoveHeaderMatcher(customHeaderName),
new HttpAddSetHeaderMatcher(customHeaderName, customHeaderValue),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
var dict = JsonConvert.DeserializeObject <Dictionary <string, IEnumerable <string> > >(responseString);
// server returns the headers in the response
Assert.AreEqual(false, dict.ContainsKey(customHeaderName));
}
public async Task MatchUsingOrMatcher()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
// if true || False then set address to serve2 and method to get
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new OrMatcher(
new FalseMatcher(),
new TrueMatcher()
)
);
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task MatchUsingAndMatcher()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
// if host name = srv1's name and port srv1's port then set the address to server 2 and http method to get.
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new AndMatcher(
new HostAddressMatcher(srv01Uri.Port.ToString(), StringMatchType.UriHostPortMatch),
new HostAddressMatcher(srv01Uri.Host, StringMatchType.UriHostNameMatch)
)
);
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task BasicTelemetry()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
// this pluming is to extract which host are we going to use to route
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
Assert.IsTrue(router.TotalExecutedLastMin > 0);
Assert.IsTrue(router.TotalResolvedLastMin > 0);
}
public async Task OverrideSchemeAndPath()
{
var resolver = new HttpRouteResolver();
var path = "api/values/0";
/*
* route to server 2 override the scheme to http & path to a static path
*/
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new HttpOverridePathMatcher("/api/values/0"),
new HttpOverrideSchemeMatcher("http"),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter(resolver);
var results = await router.RouteAsync(string.Concat("xxx://", Srv01HostNamePort)); // bad scehme & no path
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
// server returns the address
// in the response
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
}
public async Task SimpleLoadBalance()
{
var resolver = new HttpRouteResolver();
/*
* anything point to http://localhost:9001
* will be routed R/R balanced to
* http://locahost:9001
* http://locahost:9002
* http://locahost:9003
*
* With HttpGet + Same path
*/
var path = "/api/values/0";
var trytimes = 3;
var firstMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
firstMatcher.Chain(new SetAddressListMatcher(new string[] { Srv01HostNamePort, Srv02HostNamePort, Srv03HostNamePort }, false, ContextRoutingType.RoundRobin),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(firstMatcher, 0);
var router = new HttpRouter(resolver);
var resultsList = new List <HttpRoutingResult>(trytimes);
var responsesList = new HashSet <string>();
// call as many as try times
for (var i = 1; i <= trytimes; i++)
{
resultsList.Add(await router.RouteAsync(string.Concat(srv01Address, path)));
}
foreach (var result in resultsList)
{
var responseMessage = await result.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
responsesList.Add(responseString);
}
// response list should contain
// http <server1> + path
// http <server2> + path
// http <server3> + path
var expectedList = new List <string>()
{
string.Concat("http://", Srv01HostNamePort, path),
string.Concat("http://", Srv02HostNamePort, path),
string.Concat("http://", Srv03HostNamePort, path)
};
foreach (var response in responsesList)
{
if (expectedList.Contains(response))
{
expectedList.Remove(response);
}
}
Assert.IsTrue(expectedList.Count == 0); // all hosts in the system
}
public async Task LongLoadBalance()
{
var resolver = new HttpRouteResolver();
/*
* anything point to http://localhost:9001
* will be routed R/R balanced to
* http://locahost:9001
* http://locahost:9002
* http://locahost:9003
*
* With HttpGet + Same path
*/
var path = "/api/values/0";
var trytimes = 9;
// this pluming is to extract which host are we going to use to route
var firstMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
firstMatcher.Chain(new SetAddressListMatcher(new string[] { Srv01HostNamePort, Srv02HostNamePort, Srv03HostNamePort }, false, ContextRoutingType.RoundRobin),
new HostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(firstMatcher, 0);
var router = new HttpRouter(resolver);
var resultsList = new List <HttpRoutingResult>(trytimes);
var responsesList = new Dictionary <string, int>();
// call as many as try times
for (var i = 1; i <= trytimes; i++)
{
resultsList.Add(await router.RouteAsync(string.Concat(srv01Address, path)));
}
foreach (var result in resultsList)
{
var responseMessage = await result.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
if (!responsesList.ContainsKey(responseString))
{
responsesList.Add(responseString, 1);
}
else
{
responsesList[responseString] = ++responsesList[responseString];
}
}
var bSucess = true;
// validate that each is called exactly 3 times
foreach (var key in responsesList.Keys)
{
if (responsesList[key] != 3)
{
bSucess = false;
break;
}
}
Assert.IsTrue(bSucess); // all hosts in the system
}
public async Task AllTelemetry()
{
Trace.WriteLine("This test expects router's min clicker to trim every 5 sec");
var resolver = new HttpRouteResolver();
// simple routing to ensure that resolver routing algorthim is working
/*
* Route all requests from Server 1 to Server 2
*
*/
var path = "api/values/0";
// this pluming is to extract which host are we going to use to route
var headMatcher = new HttpSetMethodMatcher(HttpMethod.Get);
headMatcher.Chain(new SetAddressListMatcher(Srv02HostNamePort),
new IsHostAddressMatcher(Srv01HostNamePort, StringMatchType.UriHostandPortMatch));
await resolver.AddMatcherAsync(headMatcher, 0);
var router = new HttpRouter.Core.HttpRouter(resolver);
router.DefaultCallHandlingStratgy = new RetryStrategy(100);
var results = await router.RouteAsync(string.Concat(srv01Address, path));
var responseMessage = await results.ResultAsAsync <HttpResponseMessage>();
var responseString = await responseMessage.Content.ReadAsStringAsync();
Assert.AreEqual(string.Concat(srv02Address, path), responseString);
var TotalExecutedLastMin = router.TotalExecutedLastMin;
var TotalResolvedLastMin = router.TotalResolvedLastMin;
Assert.IsTrue(TotalExecutedLastMin > 0);
Assert.IsTrue(TotalResolvedLastMin > 0);
await Task.Delay(TimeSpan.FromSeconds(61)); // wait for at least one trim to happen (from min clicker to hour cliker, every min)
var TotalExecutedLastHour = router.TotalExecutedLastHour;
var TotalResolvedLastHour = router.TotalResolvedLastHour;
var AvgExecuteTimePerMinLastHour = router.AvgExecuteTimePerMinLastHour;
var AvgResolveTimePerMinLastHour = router.AvgResolveTimePerMinLastHour;
Assert.IsTrue(TotalExecutedLastHour > 0);
Assert.IsTrue(TotalResolvedLastHour > 0);
Assert.IsTrue(AvgExecuteTimePerMinLastHour > 0);
Assert.IsTrue(AvgResolveTimePerMinLastHour > 0);
// Write
Trace.WriteLine(string.Concat("TotalExecutedLastMin: ", TotalExecutedLastMin));
Trace.WriteLine(string.Concat("TotalResolvedLastMin: ", TotalResolvedLastMin));
Trace.WriteLine(string.Concat("TotalExecutedLastHour: ", TotalExecutedLastHour));
Trace.WriteLine(string.Concat("TotalResolvedLastHour: ", TotalResolvedLastHour));
Trace.WriteLine(string.Concat("AvgExecuteTimePerMinLastHour: ", AvgExecuteTimePerMinLastHour));
Trace.WriteLine(string.Concat("AvgResolveTimePerMinLastHour: ", AvgResolveTimePerMinLastHour));
}
private async Task <HttpRouter> GetRouter()
{
/*
* factory create a instance of SocketSession for incoming connection.
* in this test we will create a router attached it to the factory (which is injected in every socket session)
*
*/
// prepare the router
var resolver = new HttpRouteResolver();
// routing logic
//-> If context contains GetModels (route to backend(s), fastest route, add scheme, add path, ignore body, set HttpMethod to Get)
var getModelsMatchers = new HttpSetMethodMatcher(HttpMethod.Get);
getModelsMatchers.Chain(new IgnoreSourceBodyStreamMatcher(), // ignore whatever message body provided by the socket.
new SetAddressListMatcher(new string[] { RouterTestSuit.Srv01HostNamePort, RouterTestSuit.Srv02HostNamePort, RouterTestSuit.Srv03HostNamePort }, // address list
true, // clear whatever there
ContextRoutingType.FastestRoute), // fastest
new HttpOverridePathMatcher("/api/models/"), // add path
new HttpOverrideSchemeMatcher("http"), // add scheme
new ContextValueStringMatcher("Message.Type", "GetModels"));
//-> If context contains AddModels
var addModelsMatcher = new HttpSetMethodMatcher(HttpMethod.Post);
addModelsMatcher.Chain(
new SetAddressListMatcher(RouterTestSuit.Srv01HostNamePort), // set address to Server1
new HttpAddSetHeaderMatcher("Content-Type", "application/json"), // my socket puts everything as json
new HttpOverridePathMatcher("/api/models/"), // add path
new HttpOverrideSchemeMatcher("http"), // add scheme
new ContextValueStringMatcher("Message.Type", "AddModels")
);
// There are multiple ways i can do use the above matchers
/* method 1) use Or matcher
* var orMatcher = new OrMatcher(getModelsMatchers, addModelsMatcher);
* await resolver.AddMatcherAsync(orMatcher, 0);
*/
/* method 2) use AnyMatcher
* var anyMatcher = new AnyMatcher(getModelsMatchers, addModelsMatcher);
* await resolver.AddMatcherAsync(anyMatcher, 0);
*/
// method 3) use the new ContextValueStringMatcher("Message.Type", "AddModels") in an IIF matcher (remember to remove them from Add/Get matcher variables above).
// or just create differet matchers in resolvers. the advantages, if each tree wants to cache and have state on thier
// they will do that without conficlts (check how load balanacer is used in HttpRoutingContext).
await resolver.AddMatcherAsync(getModelsMatchers, 0);
await resolver.AddMatcherAsync(addModelsMatcher, 1);
var router = new HttpRouter(resolver);
return(router);
}