83 lines
2.9 KiB
C#
83 lines
2.9 KiB
C#
using System.Net.Http;
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using System.Threading;
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using System.Threading.Tasks;
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using ytLive.Models;
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namespace ytLive.Services;
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public sealed class SocialLookupResult
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{
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public bool Success { get; init; }
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public string ProfileUrl { get; init; } = string.Empty;
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public string Handle { get; init; } = string.Empty;
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public string Error { get; init; } = string.Empty;
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}
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public interface ISocialValidator
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{
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Task<SocialLookupResult> LookupAsync(SocialService service, string handleOrUrl);
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}
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/// <summary>
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/// Validates a social handle/URL by constructing the canonical profile URL and
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/// issuing an HTTP GET — the "act of validation" the creator trusts before the
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/// icon lands on their bar. Best-effort: some platforms return challenges/blocks
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/// to HEAD requests, so a 200 OR a 301/302 redirect counts as "exists"; 404 or
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/// connection failure = rejected. Never blind trust.
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/// </summary>
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public sealed class HttpSocialValidator : ISocialValidator
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{
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private readonly HttpClient _client;
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public HttpSocialValidator(HttpClient? client = null)
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{
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_client = client ?? new HttpClient();
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_client.DefaultRequestHeaders.UserAgent.ParseAdd(
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"Mozilla/5.0 (compatible; ytLlive social validator)");
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}
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public async Task<SocialLookupResult> LookupAsync(SocialService service, string handleOrUrl)
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{
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var input = handleOrUrl.Trim();
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if (string.IsNullOrWhiteSpace(input))
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return new SocialLookupResult { Error = "Enter a handle or URL." };
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var handle = input;
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if (input.StartsWith("http://", System.StringComparison.OrdinalIgnoreCase) ||
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input.StartsWith("https://", System.StringComparison.OrdinalIgnoreCase))
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{
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var uri = new System.Uri(input);
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handle = uri.AbsolutePath.Trim('/');
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}
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var url = SocialServiceIcons.CanonicalUrlFor(service, handle);
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try
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{
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using var resp = await _client.GetAsync(url, CancellationToken.None);
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if (resp.IsSuccessStatusCode || (int)resp.StatusCode is 301 or 302 or 303 or 307 or 308)
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return new SocialLookupResult
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{
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Success = true,
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ProfileUrl = url,
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Handle = handle.TrimStart('@'),
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};
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return new SocialLookupResult
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{
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Error = $"{service} returned {resp.StatusCode} for '{handle}'. The handle may be wrong or the page doesn't exist.",
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};
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}
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catch (System.Net.Http.HttpRequestException)
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{
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return new SocialLookupResult
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{
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Error = $"Couldn't reach {service} to validate '{handle}'. Check your connection and try again.",
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};
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}
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catch (System.Exception ex)
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{
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return new SocialLookupResult { Error = ex.Message };
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}
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}
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}
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