我想使用 Refit 来查询 API。首先,我需要获取一个访问令牌,它是一个返回状态 400 的 POST 请求。我不知道是什么原因导致了问题,因此我想查看发送到 API 的实际原始请求。不幸的是,我还没有设法让它发挥作用,而且很可能在开发过程中我会更频繁地需要它。
我发现了这个帅气的记录器,并认为我可以在我的
program.cs
中使用它作为 DelegatingHandler,如下所示:
builder.Services.AddRefitClient<IVismaConnect>().ConfigureHttpClient(config =>
{
config.BaseAddress = new Uri("https://ENDPOINT");
config.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", "SOMECREDENTIALSTHATEVENTUALLYWILLBEREADFROMACONFIGFILE");
config.DefaultRequestHeaders.TryAddWithoutValidation("content-type", "application/x-www-form-urlencoded");
}).AddHttpMessageHandler<HttpLoggingHandler>();
现在我收到一条奇特的错误消息,告诉我“没有注册类型的服务...HttpLoggingHandler”:
所以我用谷歌搜索了一下,发现一个提示,我需要将 HttpLoggingHandler 注册为单例,因此我将这一行放在program.cs中我的代码的正上方(也在下面尝试过,没有任何区别):
builder.Services.AddTransient<HttpLoggingHandler>();
现在我收到另一个异常,说“'InnerHandler'属性必须为空。提供给'HttpMessageHandlerBuilder'的'DelegatingHandler'实例不得重用或缓存”:
经过更多谷歌搜索后,我找到了一些文档有关 Microsoft 的 ASP.NET core 中的 HTTP 日志记录。
这并没有改变任何东西,异常仍然弹出,所以我只尝试了MS的建议,没有我之前尝试过的HttpLoggingHandler,但这并没有生成任何输出。
任何有关如何正确记录 Refit 发送到服务器的原始请求的建议将不胜感激。请参阅下面的完整
program.cs
文件:
var builder = WebApplication.CreateBuilder(args);
builder.Services.AddHttpLogging(logging =>
{
logging.LoggingFields = HttpLoggingFields.All;
});
// Add services to the container.
builder.Services.AddTransient<HttpLoggingHandler>();
builder.Services.AddRefitClient<IVismaConnect>().ConfigureHttpClient(config =>
{
config.BaseAddress = new Uri("https://ENDPOINT");
config.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", "SOMECREDENTIALSTHATEVENTUALLYWILLBEREADFROMACONFIGFILE");
config.DefaultRequestHeaders.TryAddWithoutValidation("content-type", "application/x-www-form-urlencoded");
}); //.AddHttpMessageHandler<HttpLoggingHandler>();
builder.Configuration
.SetBasePath(Environment.CurrentDirectory)
.AddJsonFile("appsettings.json", true)
.AddUserSecrets(Assembly.GetExecutingAssembly(), true)
.AddEnvironmentVariables()
.Build();
ConfigurationManager configuration = builder.Configuration;
C.Instance.SetConfiguration(configuration);
builder.Logging.ClearProviders();
builder.Logging.AddConfiguration(configuration).AddConsole().AddDebug().AddSimpleConsole();
IWebHostEnvironment environment = builder.Environment;
// Add services to the container.
builder.Services.AddCors(options =>
{
options.AddPolicy(name: MyAllowSpecificOrigins,
builder =>
{
builder.WithOrigins("*").AllowAnyMethod().AllowAnyHeader();
});
});
builder.Services.AddControllersWithViews();
var app = builder.Build();
// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
// The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
app.UseHsts();
}
app.UseHttpLogging();
app.Use(async (context, next) =>
{
context.Response.Headers["MyResponseHeader"] =
new string[] { "My Response Header Value" };
await next();
});
app.UseHttpsRedirection();
app.UseStaticFiles();
app.UseRouting();
app.UseCors(MyAllowSpecificOrigins);
app.UseAuthentication();
app.UseAuthorization();
app.MapControllerRoute(
name: "default",
pattern: "{controller}/{action=Index}/{id?}");
app.MapFallbackToFile("index.html"); ;
app.Run();
从自定义处理程序中删除构造函数就可以了。处理程序的当前实现始终使用参数化构造函数来初始化自身,这使得
InnerHandler
不为 null。
我不知道这是否仍然有帮助,但我编写了一个简化了这一点的包:nuget.org/packages/RefitLogCalls