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Harden param.json metadata parsing (#134)

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Co-authored-by: Dafenx <196083014+Dafenxz0@users.noreply.github.com>
This commit is contained in:
Dafenx
2026-07-14 16:10:32 +02:00
committed by GitHub
parent 26a570633c
commit 1d33ef90fc
1 changed files with 39 additions and 15 deletions
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54
src/SharpEmu.Core/Loader/ParamLoader.cs
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@@ -45,7 +45,13 @@ public static class Ps5ParamJsonReader
try
{
using var doc = JsonDocument.Parse(data);
ReadOnlyMemory<byte> json = data;
if (json.Span.StartsWith("\uFEFF"u8))
{
json = json[3..];
}
using var doc = JsonDocument.Parse(json);
return TryReadPs5Param(doc.RootElement);
}
catch (JsonException)
@@ -56,12 +62,15 @@ public static class Ps5ParamJsonReader
private static (string? Title, string? TitleId, string? Version) TryReadPs5Param(JsonElement root)
{
string? titleId = root.TryGetProperty("titleId", out var eTid) ? eTid.GetString() : null;
if (root.ValueKind != JsonValueKind.Object)
return (null, null, null);
var titleId = GetString(root, "titleId");
string? ver =
(root.TryGetProperty("contentVersion", out var cv) ? cv.GetString() : null)
?? (root.TryGetProperty("masterVersion", out var mv) ? mv.GetString() : null)
?? (root.TryGetProperty("targetContentVersion", out var tv) ? tv.GetString() : null);
GetString(root, "contentVersion")
?? GetString(root, "masterVersion")
?? GetString(root, "targetContentVersion");
string? title = ExtractTitleName(root);
@@ -70,34 +79,49 @@ public static class Ps5ParamJsonReader
private static string? ExtractTitleName(JsonElement root)
{
if (!root.TryGetProperty("localizedParameters", out var lp))
if ((!root.TryGetProperty("localizedParameters", out var lp) || lp.ValueKind != JsonValueKind.Object) &&
root.TryGetProperty("disc", out var disc) && disc.ValueKind == JsonValueKind.Object)
{
if (root.TryGetProperty("disc", out var disc) && disc.ValueKind == JsonValueKind.Object)
{
disc.TryGetProperty("localizedParameters", out lp);
}
disc.TryGetProperty("localizedParameters", out lp);
}
if (lp.ValueKind != JsonValueKind.Object)
return null;
string? defLang = lp.TryGetProperty("defaultLanguage", out var dl) ? dl.GetString() : null;
var defLang = GetString(lp, "defaultLanguage");
if (!string.IsNullOrEmpty(defLang))
{
if (lp.TryGetProperty(defLang, out var langObj) && langObj.ValueKind == JsonValueKind.Object)
{
if (langObj.TryGetProperty("titleName", out var tn))
return tn.GetString();
var title = GetString(langObj, "titleName");
if (!string.IsNullOrWhiteSpace(title))
return title;
}
}
if (lp.TryGetProperty("en-US", out var en) && en.ValueKind == JsonValueKind.Object)
{
if (en.TryGetProperty("titleName", out var tn2))
return tn2.GetString();
var title = GetString(en, "titleName");
if (!string.IsNullOrWhiteSpace(title))
return title;
}
foreach (var property in lp.EnumerateObject())
{
if (property.Value.ValueKind == JsonValueKind.Object)
{
var title = GetString(property.Value, "titleName");
if (!string.IsNullOrWhiteSpace(title))
return title;
}
}
return null;
}
private static string? GetString(JsonElement parent, string propertyName) =>
parent.TryGetProperty(propertyName, out var value) && value.ValueKind == JsonValueKind.String
? value.GetString()
: null;
}