如何解决重复调用 AddHttpClient 会互相覆盖吗?
services.AddHttpClient("CompanyStandardClient").AddCompanyAuthenticationHeaders();
services.AddHttpClient("CompanyStandardClient").AddCompanyHeaderPropagation();
基本上,一个 NuGet 设置我公司的身份验证,另一个设置公司的标头传播。
我通常会这样做:
services.AddHttpClient("CompanyStandardClient").AddCompanyAuthenticationHeaders().AddCompanyHeaderPropagation()
我担心如果我将它们分开,则只有一个有效。我查看了 code on GitHub,它为每次调用返回一个 new
ed DefaultHttpClientBuilder。
return new DefaultHttpClientBuilder(services,name);
但我不确定这是否意味着之前的条目被覆盖了。
同名客户端可以单独“添加”吗?还是会覆盖?
解决方法
根据此处的内部评论,我认为可以为同名客户完成此操作。
// See comments on HttpClientMappingRegistry.
private static void ReserveClient(IHttpClientBuilder builder,Type type,string name,bool validateSingleType)
{
var registry = (HttpClientMappingRegistry)builder.Services.Single(sd => sd.ServiceType == typeof(HttpClientMappingRegistry)).ImplementationInstance;
Debug.Assert(registry != null);
// Check for same name registered to two types. This won't work because we rely on named options for the configuration.
if (registry.NamedClientRegistrations.TryGetValue(name,out Type otherType) &&
// Allow using the same name with multiple types in some cases (see callers).
validateSingleType &&
// Allow registering the same name twice to the same type.
type != otherType)
{
string message =
$"The HttpClient factory already has a registered client with the name '{name}',bound to the type '{otherType.FullName}'. " +
$"Client names are computed based on the type name without considering the namespace ('{otherType.Name}'). " +
$"Use an overload of AddHttpClient that accepts a string and provide a unique name to resolve the conflict.";
throw new InvalidOperationException(message);
}
if (validateSingleType)
{
registry.NamedClientRegistrations[name] = type;
}
}
客户端选项配置将聚合为一个选项。
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。