35 lines
1.1 KiB
C#
35 lines
1.1 KiB
C#
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using System;
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using System.Threading.Tasks;
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using PCL.Core.IO.Net.Http;
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namespace PCL.Core.Minecraft.Yggdrasil;
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public static class ApiLocation
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{
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public static async Task<string> TryRequestAsync(string address)
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{
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var originAddr = address.StartsWith("http") ? address : $"https://{address}";
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var originUri = new Uri(originAddr);
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using var response = await HttpRequest
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.CreateHead(originAddr)
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.SendAsync();
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if (!response.TryGetHeader("X-Authlib-Injector-Api-Location", out var location)
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|| location.Length == 0)
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return originAddr;
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// TODO: use schema instead
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var resultAddr = location[0];
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if (string.IsNullOrEmpty(resultAddr)) return originAddr;
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if (resultAddr.StartsWith(originUri.Scheme)) return resultAddr;
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// 不允许 HTTPS 降 HTTP
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if (resultAddr.StartsWith("http:") && originUri.Scheme == "https")
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return resultAddr.Replace("http","https");
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return new Uri(originUri, resultAddr).ToString();
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}
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}
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