我想使用的HttpClientFactory是在.NET 2.1核心可用，但我也想用HttpClientHandler，以利用AutomaticDecompression創建時屬性HttpClients。我很掙扎，因為.AddHttpMessageHandler<>需要一個DelegatingHandler不是HttpClientHandler.有誰知道如何讓這個工作？
2 回答
白板的微信
TA貢獻1883條經驗 獲得超3個贊
其實我沒有使用自動解壓，但實現這一點的方法是正確注冊http客戶端
services.AddHttpClient<MyCustomHttpClient>()
.ConfigureHttpMessageHandlerBuilder((c) =>
new HttpClientHandler()
{
AutomaticDecompression = System.Net.DecompressionMethods.GZip
}
)
.AddHttpMessageHandler((s) => s.GetService<MyCustomDelegatingHandler>())
ITMISS
TA貢獻1871條經驗 獲得超8個贊
通過 HttpClientBuilder 的 ConfigurePrimaryHttpMessageHandler() 方法定義主 HttpMessageHandler 更合適。請參閱下面的示例以配置類型化客戶端。
services.AddHttpClient<TypedClient>()
.ConfigureHttpClient((sp, httpClient) =>
{
var options = sp.GetRequiredService<IOptions<SomeOptions>>().Value;
httpClient.BaseAddress = options.Url;
httpClient.Timeout = options.RequestTimeout;
})
.SetHandlerLifetime(TimeSpan.FromMinutes(5))
.ConfigurePrimaryHttpMessageHandler(x => new HttpClientHandler()
{
AutomaticDecompression = DecompressionMethods.GZip | DecompressionMethods.Deflate;
})
.AddHttpMessageHandler(sp => sp.GetService<SomeCustomHandler>().CreateAuthHandler())
.AddPolicyHandlerFromRegistry(PollyPolicyName.HttpRetry)
.AddPolicyHandlerFromRegistry(PollyPolicyName.HttpCircuitBreaker);
您還可以通過使用 Polly 庫的特殊構建器方法來定義錯誤處理策略。在這個示例中，策略應該被預定義并存儲到策略注冊服務中。
public static IServiceCollection AddPollyPolicies(
this IServiceCollection services,
Action<PollyPoliciesOptions> setupAction = null)
{
var policyOptions = new PollyPoliciesOptions();
setupAction?.Invoke(policyOptions);
var policyRegistry = services.AddPolicyRegistry();
policyRegistry.Add(
PollyPolicyName.HttpRetry,
HttpPolicyExtensions
.HandleTransientHttpError()
.WaitAndRetryAsync(
policyOptions.HttpRetry.Count,
retryAttempt => TimeSpan.FromSeconds(Math.Pow(policyOptions.HttpRetry.BackoffPower, retryAttempt))));
policyRegistry.Add(
PollyPolicyName.HttpCircuitBreaker,
HttpPolicyExtensions
.HandleTransientHttpError()
.CircuitBreakerAsync(
handledEventsAllowedBeforeBreaking: policyOptions.HttpCircuitBreaker.ExceptionsAllowedBeforeBreaking,
durationOfBreak: policyOptions.HttpCircuitBreaker.DurationOfBreak));
return services;
}
- 2 回答
- 0 關注
- 395 瀏覽
添加回答
舉報
0/150
提交
取消