wehub-resource-sync
57 lines
2.6 KiB
C#
57 lines
2.6 KiB
C#
// Copyright (c) Microsoft. All rights reserved.
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using System.Net;
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using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Http.Resilience;
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using Microsoft.Extensions.Logging;
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using Microsoft.SemanticKernel;
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namespace DependencyInjection;
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// These examples show how to use HttpClient and HttpClientFactory within SK SDK.
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public class HttpClient_Resiliency(ITestOutputHelper output) : BaseTest(output)
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{
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/// <summary>
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/// Demonstrates the usage of the HttpClientFactory with a custom resilience policy.
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/// </summary>
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[Fact]
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public async Task RunAsync()
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{
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// Create a Kernel with the HttpClient
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IKernelBuilder builder = Kernel.CreateBuilder();
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builder.Services.AddLogging(c => c.AddConsole().SetMinimumLevel(LogLevel.Information));
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builder.Services.ConfigureHttpClientDefaults(c =>
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{
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// Use a standard resiliency policy, augmented to retry on 401 Unauthorized for this example
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c.AddStandardResilienceHandler().Configure(o =>
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{
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o.Retry.ShouldHandle = args => ValueTask.FromResult(args.Outcome.Result?.StatusCode is HttpStatusCode.Unauthorized);
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});
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});
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builder.Services.AddOpenAIChatCompletion("gpt-4", "BAD_KEY"); // OpenAI settings - you can set the OpenAI.ApiKey to an invalid value to see the retry policy in play
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Kernel kernel = builder.Build();
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var logger = kernel.LoggerFactory.CreateLogger(typeof(HttpClient_Resiliency));
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const string Question = "How do I add a standard resilience handler in IHttpClientBuilder??";
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logger.LogInformation("Question: {Question}", Question);
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// The call to OpenAI will fail and be retried a few times before eventually failing.
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// Retrying can overcome transient problems and thus improves resiliency.
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try
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{
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// The InvokePromptAsync call will issue a request to OpenAI with an invalid API key.
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// That will cause the request to fail with an HTTP status code 401. As the resilience
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// handler is configured to retry on 401s, it'll reissue the request, and will do so
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// multiple times until it hits the default retry limit, at which point this operation
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// will throw an exception in response to the failure. All of the retries will be visible
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// in the logging out to the console.
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logger.LogInformation("Answer: {Result}", await kernel.InvokePromptAsync(Question));
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}
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catch (Exception ex)
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{
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logger.LogInformation("Error: {Message}", ex.Message);
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}
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}
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}
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