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85 lines
2.7 KiB
C#
85 lines
2.7 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using Jellyfin.Extensions;
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using Microsoft.AspNetCore.Http;
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using Microsoft.AspNetCore.Http.Features;
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using Microsoft.Extensions.Primitives;
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namespace Jellyfin.Server.Middleware
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{
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/// <summary>
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/// Defines the <see cref="UrlDecodeQueryFeature"/>.
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/// </summary>
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public class UrlDecodeQueryFeature : IQueryFeature
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{
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private IQueryCollection? _store;
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/// <summary>
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/// Initializes a new instance of the <see cref="UrlDecodeQueryFeature"/> class.
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/// </summary>
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/// <param name="feature">The <see cref="IQueryFeature"/> instance.</param>
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public UrlDecodeQueryFeature(IQueryFeature feature)
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{
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Query = feature.Query;
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}
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/// <summary>
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/// Gets or sets a value indicating the url decoded <see cref="IQueryCollection"/>.
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/// </summary>
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public IQueryCollection Query
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{
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get
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{
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return _store ?? QueryCollection.Empty;
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}
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set
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{
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// Only interested in where the querystring is encoded which shows up as one key with nothing in the value.
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if (value.Count != 1)
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{
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_store = value;
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return;
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}
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// Encoded querystrings have no value, so don't process anything if a value is present.
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var (key, stringValues) = value.First();
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if (!string.IsNullOrEmpty(stringValues))
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{
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_store = value;
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return;
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}
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if (!key.Contains('=', StringComparison.Ordinal))
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{
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_store = value;
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return;
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}
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var pairs = new Dictionary<string, StringValues>();
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foreach (var pair in key.SpanSplit('&'))
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{
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var i = pair.IndexOf('=');
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if (i == -1)
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{
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// encoded is an equals.
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// We use TryAdd so duplicate keys get ignored
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pairs.TryAdd(pair.ToString(), StringValues.Empty);
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continue;
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}
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var k = pair[..i].ToString();
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var v = pair[(i + 1)..].ToString();
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if (!pairs.TryAdd(k, new StringValues(v)))
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{
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pairs[k] = StringValues.Concat(pairs[k], v);
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}
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}
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_store = new QueryCollection(pairs);
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}
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}
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}
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}
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