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Enhanced HTTP Range request support for. strm file

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Forward the Range, Accept-Ranges, and Content-
Range headers, improve User-Agent handling,
and adjust the default Content-Type.
This commit is contained in:
sususu98 2025-04-23 15:37:58 +08:00
parent 0a0fcd3b19
commit a7891b3f2d
1 changed files with 55 additions and 5 deletions
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60
Jellyfin.Api/Helpers/FileStreamResponseHelpers.cs
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@ -32,17 +32,67 @@ public static class FileStreamResponseHelpers
HttpContext httpContext,
CancellationToken cancellationToken = default)
{
using var requestMessage = new HttpRequestMessage(HttpMethod.Get, new Uri(state.MediaPath));
// Forward User-Agent if provided
if (state.RemoteHttpHeaders.TryGetValue(HeaderNames.UserAgent, out var useragent))
{
httpClient.DefaultRequestHeaders.Add(HeaderNames.UserAgent, useragent);
// Clear default and add specific one if exists, otherwise HttpClient default might be used
requestMessage.Headers.UserAgent.Clear();
requestMessage.Headers.TryAddWithoutValidation(HeaderNames.UserAgent, useragent);
}
// Can't dispose the response as it's required up the call chain.
var response = await httpClient.GetAsync(new Uri(state.MediaPath), HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
var contentType = response.Content.Headers.ContentType?.ToString() ?? MediaTypeNames.Text.Plain;
// Forward Range header if present in the client request
if (httpContext.Request.Headers.TryGetValue(HeaderNames.Range, out var rangeValue))
{
var rangeString = rangeValue.ToString();
if (!string.IsNullOrEmpty(rangeString))
{
requestMessage.Headers.Range = System.Net.Http.Headers.RangeHeaderValue.Parse(rangeString);
}
}
httpContext.Response.Headers[HeaderNames.AcceptRanges] = "none";
// Send the request to the upstream server
// Use ResponseHeadersRead to avoid downloading the whole content immediately
var response = await httpClient.SendAsync(requestMessage, HttpCompletionOption.ResponseHeadersRead, cancellationToken).ConfigureAwait(false);
// Check if the upstream server supports range requests and acted upon our Range header
bool upstreamSupportsRange = response.StatusCode == System.Net.HttpStatusCode.PartialContent;
string acceptRangesValue = "none";
if (response.Headers.TryGetValues(HeaderNames.AcceptRanges, out var acceptRangesHeaders))
{
// Prefer upstream server's Accept-Ranges header if available
acceptRangesValue = string.Join(", ", acceptRangesHeaders);
upstreamSupportsRange |= acceptRangesValue.Contains("bytes", StringComparison.OrdinalIgnoreCase);
}
else if (upstreamSupportsRange) // If we got 206 but no Accept-Ranges header, assume bytes
{
acceptRangesValue = "bytes";
}
// Set Accept-Ranges header for the client based on upstream support
httpContext.Response.Headers[HeaderNames.AcceptRanges] = acceptRangesValue;
// Set Content-Range header if upstream provided it (implies partial content)
if (response.Content.Headers.ContentRange is not null)
{
httpContext.Response.Headers[HeaderNames.ContentRange] = response.Content.Headers.ContentRange.ToString();
}
// Set Content-Length header. For partial content, this is the length of the partial segment.
if (response.Content.Headers.ContentLength.HasValue)
{
httpContext.Response.ContentLength = response.Content.Headers.ContentLength.Value;
}
// Set Content-Type header
var contentType = response.Content.Headers.ContentType?.ToString() ?? MediaTypeNames.Application.Octet; // Use a more generic default
// Set the status code for the client response (e.g., 200 OK or 206 Partial Content)
httpContext.Response.StatusCode = (int)response.StatusCode;
// Return the stream from the upstream server
// IMPORTANT: Do not dispose the response stream here, FileStreamResult will handle it.
return new FileStreamResult(await response.Content.ReadAsStreamAsync(cancellationToken).ConfigureAwait(false), contentType);
}