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feat(storage): Implement the StreamedCustomDataLoader
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,80 +1,8 @@ | ||
| #nullable enable | ||
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| using System; | ||
| using System.IO; | ||
| using System.Net.Http; | ||
| using System.Threading; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Extensions.Logging; | ||
| using Uno; | ||
| using Uno.Extensions; | ||
|
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| namespace Windows.Storage | ||
| { | ||
| public delegate void StreamedFileDataRequestedHandler(StreamedFileDataRequest stream); | ||
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| //internal static class StreamedFileDataRequestedHandlerHelper | ||
| //{ | ||
| // public static StreamedFileDataRequestedHandler CreateFromUri( | ||
| // Uri uri, | ||
| // HttpMethod? method = null, | ||
| // HttpClient? client = null, | ||
| // ActionAsync<HttpResponseMessage?, Exception?>? onReady = null) | ||
| // { | ||
| // method ??= HttpMethod.Get; | ||
| // client ??= new HttpClient(); | ||
|
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| // return req => Task.Run(() => FetchAsync(req, uri, method, client, onReady, req.CancellationToken)); | ||
| // } | ||
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| // private static async Task FetchAsync( | ||
| // StreamedFileDataRequest req, | ||
| // Uri uri, | ||
| // HttpMethod method, | ||
| // HttpClient client, | ||
| // ActionAsync<HttpResponseMessage?, Exception?>? onReady, | ||
| // CancellationToken ct) | ||
| // { | ||
| // try | ||
| // { | ||
| // HttpResponseMessage response; | ||
| // try | ||
| // { | ||
| // var request = new HttpRequestMessage(method, uri); | ||
| // response = await client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead, ct); | ||
|
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| // response.EnsureSuccessStatusCode(); | ||
|
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| // if (onReady is {}) | ||
| // { | ||
| // await onReady(ct, response, null); | ||
| // } | ||
| // } | ||
| // catch (Exception e) when (onReady is {}) | ||
| // { | ||
| // await onReady(ct, null, e); | ||
| // throw; | ||
| // } | ||
|
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| // if (response.Content is { } content) | ||
| // { | ||
| // var responseStream = await content.ReadAsStreamAsync(); | ||
| // await responseStream.CopyToAsync(req.AsStreamForWrite(), global::Windows.Storage.Streams.Buffer.DefaultCapacity, ct); | ||
| // } | ||
| // } | ||
| // catch (Exception e) | ||
| // { | ||
| // if (req.Log().IsEnabled(LogLevel.Warning)) | ||
| // { | ||
| // req.Log().LogWarning("Failed to load content", e); | ||
| // } | ||
|
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| // req.FailAndClose(StreamedFileFailureMode.Failed); | ||
| // } | ||
| // finally | ||
| // { | ||
| // req.Dispose(); | ||
| // } | ||
| // } | ||
| //} | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,64 @@ | ||
| #nullable enable | ||
|
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| using System; | ||
| using System.Linq; | ||
| using Windows.Foundation; | ||
|
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| namespace Windows.Storage.Streams | ||
| { | ||
| internal class StreamedCustomDataLoader : IStreamedDataLoader | ||
| { | ||
| private uint _loaded; | ||
| private bool _isCompleted; | ||
| private StreamedFileFailureMode? _failure; | ||
|
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| public StreamedCustomDataLoader(StreamedFileDataRequestedHandler handler, TemporaryFile? tempFile = null) | ||
| { | ||
| File = tempFile ?? new TemporaryFile(); | ||
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| handler(new StreamedFileDataRequest(this)); | ||
| } | ||
|
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| /// <inheritdoc /> | ||
| public event TypedEventHandler<IStreamedDataLoader, object?>? DataUpdated; | ||
|
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| /// <inheritdoc /> | ||
| public TemporaryFile File { get; } | ||
|
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| /// <inheritdoc /> | ||
| public string? ContentType { get; } = RandomAccessStreamWithContentType.DefaultContentType; | ||
|
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| /// <inheritdoc /> | ||
| public void CheckState() | ||
| { | ||
| if (_failure.HasValue) | ||
| { | ||
| throw new InvalidOperationException($"The async load of the data has failed ('{_failure.Value}')"); | ||
| } | ||
| } | ||
|
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| /// <inheritdoc /> | ||
| public bool CanRead(ulong position) | ||
| => _isCompleted || position < _loaded; | ||
|
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| internal void ReportDataWritten(uint length) | ||
| { | ||
| _loaded += length; | ||
| DataUpdated?.Invoke(this, default); | ||
| } | ||
|
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| internal void ReportLoadCompleted(StreamedFileFailureMode? failure = null) | ||
| { | ||
| // Note: this is expected to be invoke more than once! | ||
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| _failure ??= failure; | ||
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| if (!_isCompleted) | ||
| { | ||
| _isCompleted = true; | ||
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| DataUpdated?.Invoke(this, default); | ||
| } | ||
| } | ||
| } | ||
| } |