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using System.Net;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Rewrite;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Newtonsoft.Json;
using SMAPI.Web.LegacyRedirects.Framework;
using StardewModdingAPI.Toolkit.Serialization;
namespace SMAPI.Web.LegacyRedirects
{
/// <summary>The web app startup configuration.</summary>
public class Startup
{
/*********
** Public methods
*********/
/// <summary>The method called by the runtime to add services to the container.</summary>
/// <param name="services">The service injection container.</param>
public void ConfigureServices(IServiceCollection services)
{
services
.AddControllers()
.AddNewtonsoftJson(options => Startup.ConfigureJsonNet(options.SerializerSettings));
}
/// <summary>The method called by the runtime to configure the HTTP request pipeline.</summary>
/// <param name="app">The application builder.</param>
/// <param name="env">The hosting environment.</param>
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
app.UseDeveloperExceptionPage();
app
.UseRewriter(this.GetRedirectRules())
.UseRouting()
.UseAuthorization()
.UseEndpoints(endpoints => endpoints.MapControllers());
}
/// <summary>Configure a Json.NET serializer.</summary>
/// <param name="settings">The serializer settings to edit.</param>
internal static void ConfigureJsonNet(JsonSerializerSettings settings)
{
foreach (JsonConverter converter in new JsonHelper().JsonSettings.Converters)
settings.Converters.Add(converter);
settings.Formatting = Formatting.Indented;
settings.NullValueHandling = NullValueHandling.Ignore;
}
/*********
** Private methods
*********/
/// <summary>Get the redirect rules to apply.</summary>
private RewriteOptions GetRedirectRules()
{
var redirects = new RewriteOptions();
redirects.Add(
new LambdaRewriteRule((context, request, response) =>
{
string host = request.Host.Host;
// map API requests to proxy
// This is needed because the low-level HTTP client SMAPI uses for Linux/Mac compatibility doesn't support redirects.
if (host == "api.smapi.io")
{
request.Path = $"/api{request.Path}";
return;
}
// redirect other requests to Azure
string newRoot = host switch
{
"api.smapi.io" => "smapi.io/api",
"json.smapi.io" => "smapi.io/json",
"log.smapi.io" => "smapi.io/log",
"mods.smapi.io" => "smapi.io/mods",
_ => "smapi.io"
};
response.StatusCode = (int)HttpStatusCode.PermanentRedirect;
response.Headers["Location"] = $"{(request.IsHttps ? "https" : "http")}://{newRoot}{request.PathBase}{request.Path}{request.QueryString}";
context.Result = RuleResult.EndResponse;
})
);
return redirects;
}
}
}
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