daniel-c-harvey
2af0d8650b
Route normal play closes (end/switch/stop) and all shares through a same-origin HttpClient POST so privacy-hardened browsers stop blocking them; keep sendBeacon for the tab-unload edge. Rename the JS module off telemetry/beacon to session/ lifecycle so the retained fallback isn't name-matched. No new data or identifiers.
47 lines
2.3 KiB
C#
47 lines
2.3 KiB
C#
using System.Text;
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namespace DeepDrftPublic.Client.Services;
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/// <summary>
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/// Production <see cref="IEventPoster"/>: a first-party, same-origin <see cref="System.Net.Http.HttpClient"/>
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/// POST to the site's own <c>api/event/*</c> proxy (telemetry transport-resilience). A fetch to the host's
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/// own origin is not third-party tracking and is not caught by the name-based heuristics (Firefox
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/// Fingerprinting / Tracking Protection) that block a <c>telemetry/beacon</c>-named <c>sendBeacon</c>
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/// module. Used for the awaitable play-close paths (organic end / track-switch / stop) and every share
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/// event; only the rare tab-unload edge still goes through <see cref="BeaconInterop"/>, where an awaited
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/// fetch would be cancelled as the page freezes.
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///
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/// <para>Best-effort and non-throwing by contract: a failed POST (offline, blocked, server error) is
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/// swallowed so a dropped telemetry event never throws into the UI or the playback path — identical
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/// posture to the beacon transport.</para>
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/// </summary>
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public sealed class HttpEventPoster : IEventPoster
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{
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// The default factory client carries no base address; the sink/tracker pass an absolute same-origin
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// URL built from NavigationManager.BaseUri, so the POST targets the host proxy regardless of how the
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// named clients are configured. The default client uses the browser fetch handler in WASM, which is
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// exactly the first-party request the heuristic blockers permit.
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private readonly IHttpClientFactory _httpClientFactory;
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public HttpEventPoster(IHttpClientFactory httpClientFactory)
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{
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_httpClientFactory = httpClientFactory;
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}
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public async Task PostAsync(string url, string json)
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{
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try
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{
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using var client = _httpClientFactory.CreateClient();
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using var content = new StringContent(json, Encoding.UTF8, "application/json");
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// Best-effort: the server records the event; we do not act on the status either way.
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using var response = await client.PostAsync(url, content);
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}
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catch
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{
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// Swallow — a dropped telemetry event is acceptable; telemetry must never throw into the UI
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// or the playback path. Mirrors the beacon's fire-and-forget contract.
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}
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}
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}
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