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Add gRPC mock requests and responses through the Administration API. #625

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opened 2025-12-29 15:29:16 +01:00 by adam · 4 comments
adam commented 2025-12-29 15:29:16 +01:00
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Originally created by @AllenXiao565 on GitHub (Aug 27, 2024).

Originally assigned to: @StefH on GitHub.

Based on the introduction and exercises from the blog post on how to use WireMock.NET with gRPC, I was able to successfully complete the first step. However, I got stuck when trying to move on to the next step. My expectation was to be able to use the Administration API to send requests and responses for simulating gRPC responses, but it seems like this is not currently supported. I was wondering if you have any other suggestions

Originally created by @AllenXiao565 on GitHub (Aug 27, 2024). Originally assigned to: @StefH on GitHub. Based on the introduction and exercises from the blog post on how to use WireMock.NET with gRPC, I was able to successfully complete the first step. However, I got stuck when trying to move on to the next step. My expectation was to be able to use the Administration API to send requests and responses for simulating gRPC responses, but it seems like this is not currently supported. I was wondering if you have any other suggestions
adam added the question label 2025-12-29 15:29:16 +01:00
adam closed this issue 2025-12-29 15:29:17 +01:00
adam commented 2025-12-29 15:29:17 +01:00
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@AllenXiao565 commented on GitHub (Aug 27, 2024):

var grpcWireMockAdminApi = RestClient.For<IWireMockAdminApi>("http://localhost:49331");

await grpcWireMockAdminApi.PostMappingAsync(new MappingModel { Request = new RequestModel { Methods = ["POST"], Path = "/BonusTransaction/ProcessCasinoBonus", Body = new BodyModel { Matcher = new MatcherModel() { ProtoBufMessageType = "ProcessCasinoBonusRequest" } } }, Response = new ResponseModel() { StatusCode = HttpStatusCode.OK, ProtoDefinition = "GrpcBonusTransaction2", Headers = new Dictionary<string, object>() { { "Content-Type", "application/grpc"} }, TrailingHeaders = new Dictionary<string, object>() { { "grpc-status", "0" } }, ProtoBufMessageType = "CasinoProcessResponse", BodyDestination = null, BodyAsJson = new CasinoProcessResponse { WinLostDate = 1690816326000, Status = 1 }, UseTransformer = true, TransformerType = "Handlebars", TransformerReplaceNodeOptions = "EvaluateAndTryToConvert", UseTransformerForBodyAsFile = false } });

The code above is my current attempt, but when I run it, I get the following error:
Unhandled exception. RestEase.ApiException: POST "http://localhost:XXX/__admin/mappings" failed because the response status code does not indicate success.
I think this might be happening because the server does not support HTTP requests for mappings when UseHttp2 is enabled.

@AllenXiao565 commented on GitHub (Aug 27, 2024): `var grpcWireMockAdminApi = RestClient.For<IWireMockAdminApi>("http://localhost:49331");` `await grpcWireMockAdminApi.PostMappingAsync(new MappingModel { Request = new RequestModel { Methods = ["POST"], Path = "/BonusTransaction/ProcessCasinoBonus", Body = new BodyModel { Matcher = new MatcherModel() { ProtoBufMessageType = "ProcessCasinoBonusRequest" } } }, Response = new ResponseModel() { StatusCode = HttpStatusCode.OK, ProtoDefinition = "GrpcBonusTransaction2", Headers = new Dictionary<string, object>() { { "Content-Type", "application/grpc"} }, TrailingHeaders = new Dictionary<string, object>() { { "grpc-status", "0" } }, ProtoBufMessageType = "CasinoProcessResponse", BodyDestination = null, BodyAsJson = new CasinoProcessResponse { WinLostDate = 1690816326000, Status = 1 }, UseTransformer = true, TransformerType = "Handlebars", TransformerReplaceNodeOptions = "EvaluateAndTryToConvert", UseTransformerForBodyAsFile = false } });` The code above is my current attempt, but when I run it, I get the following error: Unhandled exception. RestEase.ApiException: POST "http://localhost:XXX/__admin/mappings" failed because the response status code does not indicate success. I think this might be happening because the server does not support HTTP requests for mappings when UseHttp2 is enabled.
adam commented 2025-12-29 15:29:18 +01:00
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@StefH commented on GitHub (Aug 27, 2024):

The admin-api can be used to manage your mappings (which can be mappings which use grpc). Once the mappings are defined, WireMock.Net will behave like a Grpc server. The admin admin cannot be used to send Grpc request to.

See this example project for some info:
https://github.com/WireMock-Net/WireMock.Net/tree/master/examples/WireMock.Net.Console.GrpcClient

@StefH commented on GitHub (Aug 27, 2024): The admin-api can be used to manage your mappings (which can be mappings which use grpc). Once the mappings are defined, WireMock.Net will behave like a Grpc server. The admin admin cannot be used to send Grpc request to. See this example project for some info: https://github.com/WireMock-Net/WireMock.Net/tree/master/examples/WireMock.Net.Console.GrpcClient
adam commented 2025-12-29 15:29:18 +01:00
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@AllenXiao565 commented on GitHub (Aug 27, 2024):

Thank you for your response. It confirms that my assumptions were correct.

@AllenXiao565 commented on GitHub (Aug 27, 2024): Thank you for your response. It confirms that my assumptions were correct.
adam commented 2025-12-29 15:29:18 +01:00
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@GomesNayagam commented on GitHub (Jan 3, 2025):

@AllenXiao565 i am also struck to automatic grpc call for my project, i wanted to map teh jsons with various request combinaton and response and load the grpc testcontaner

@GomesNayagam commented on GitHub (Jan 3, 2025): @AllenXiao565 i am also struck to automatic grpc call for my project, i wanted to map teh jsons with various request combinaton and response and load the grpc testcontaner
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Reference: starred/WireMock.Net-wiremock#625