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xPawxPaw
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Add appinfo v29
Requires ValveResourceFormat/ValveKeyValue#99
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3 files changed

+103
-8
lines changed

3 files changed

+103
-8
lines changed

‎README.md

+23
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,29 @@ This is mostly intended as an example on how to read these files.
44

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## appinfo.vdf
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```
7+
uint32 - MAGIC: 29 44 56 07
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uint32 - UNIVERSE: 1
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int64 - Offset to string table from start of the file
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---- repeated app sections ----
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uint32 - AppID
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uint32 - size // until end of binary_vdf
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uint32 - infoState // mostly 2, sometimes 1 (may indicate prerelease or no info)
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uint32 - lastUpdated
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uint64 - picsToken
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20bytes - SHA1 // of text appinfo vdf, as seen in CMsgClientPICSProductInfoResponse.AppInfo.sha
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uint32 - changeNumber
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20bytes - SHA1 // of binary_vdf
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variable - binary_vdf
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---- end of section ----
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uint32 - EOF: 0
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---- offset to the string table ----
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uint32 - Count of strings
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null-term strings[count]
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```
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## appinfo.vdf (before june 2024)
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```
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uint32 - MAGIC: 28 44 56 07
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uint32 - UNIVERSE: 1
932
---- repeated app sections ----

‎SteamAppInfo.sln

+9-3
Original file line numberDiff line numberDiff line change
@@ -1,9 +1,11 @@
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22
Microsoft Visual Studio Solution File, Format Version 12.00
3-
# Visual Studio Version 16
4-
VisualStudioVersion = 16.0.30011.22
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# Visual Studio Version 17
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VisualStudioVersion = 17.10.35013.160
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MinimumVisualStudioVersion = 10.0.40219.1
6-
Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SteamAppInfoParser", "SteamAppInfoParser\SteamAppInfoParser.csproj", "{6B285D2E-0613-434D-86B5-A51CEA7D4445}"
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SteamAppInfoParser", "SteamAppInfoParser\SteamAppInfoParser.csproj", "{6B285D2E-0613-434D-86B5-A51CEA7D4445}"
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EndProject
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Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "ValveKeyValue", "..\..\ValveResourceFormat\ValveKeyValue\ValveKeyValue\ValveKeyValue\ValveKeyValue.csproj", "{DA073F8F-2816-4F11-983E-8C0A18F290BB}"
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EndProject
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Global
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GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -15,6 +17,10 @@ Global
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{6B285D2E-0613-434D-86B5-A51CEA7D4445}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{6B285D2E-0613-434D-86B5-A51CEA7D4445}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{6B285D2E-0613-434D-86B5-A51CEA7D4445}.Release|Any CPU.Build.0 = Release|Any CPU
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{DA073F8F-2816-4F11-983E-8C0A18F290BB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
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{DA073F8F-2816-4F11-983E-8C0A18F290BB}.Debug|Any CPU.Build.0 = Debug|Any CPU
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{DA073F8F-2816-4F11-983E-8C0A18F290BB}.Release|Any CPU.ActiveCfg = Release|Any CPU
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{DA073F8F-2816-4F11-983E-8C0A18F290BB}.Release|Any CPU.Build.0 = Release|Any CPU
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EndGlobalSection
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GlobalSection(SolutionProperties) = preSolution
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HideSolutionNode = FALSE

‎SteamAppInfoParser/AppInfo.cs

+71-5
Original file line numberDiff line numberDiff line change
@@ -1,13 +1,16 @@
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using System;
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using System.Buffers;
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using System.Collections.Generic;
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using System.Collections.ObjectModel;
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using System.IO;
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using System.Text;
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using ValveKeyValue;
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namespace SteamAppInfoParser
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{
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class AppInfo
1012
{
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private const uint Magic29 = 0x07_56_44_29;
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private const uint Magic28 = 0x07_56_44_28;
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private const uint Magic = 0x07_56_44_27;
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@@ -34,13 +37,33 @@ public void Read(Stream input)
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using var reader = new BinaryReader(input);
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var magic = reader.ReadUInt32();
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37-
if (magic != Magic && magic != Magic28)
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if (magic != Magic && magic != Magic28 && magic != Magic29)
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{
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throw new InvalidDataException($"Unknown magic header: {magic:X}");
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}
4144

4245
Universe = (EUniverse)reader.ReadUInt32();
4346

47+
var options = new KVSerializerOptions();
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49+
if (magic == Magic29)
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{
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var stringTableOffset = reader.ReadInt64();
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var offset = reader.BaseStream.Position;
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reader.BaseStream.Position = stringTableOffset;
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var stringCount = reader.ReadUInt32();
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var stringPool = new string[stringCount];
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for (var i = 0; i < stringCount; i++)
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{
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stringPool[i] = ReadNullTermUtf8String(reader.BaseStream);
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}
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62+
reader.BaseStream.Position = offset;
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options.StringPool = stringPool;
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}
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var deserializer = KVSerializer.Create(KVSerializationFormat.KeyValues1Binary);
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do
@@ -52,7 +75,8 @@ public void Read(Stream input)
5275
break;
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}
5477

55-
reader.ReadUInt32(); // size until end of Data
78+
var size = reader.ReadUInt32(); // size until end of Data
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var end = reader.BaseStream.Position + size;
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5781
var app = new App
5882
{
@@ -64,20 +88,62 @@ public void Read(Stream input)
6488
ChangeNumber = reader.ReadUInt32(),
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};
6690

67-
if (magic == Magic28)
91+
if (magic == Magic28 || magic == Magic29)
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{
6993
app.BinaryDataHash = new ReadOnlyCollection<byte>(reader.ReadBytes(20));
7094
}
7195

72-
app.Data = deserializer.Deserialize(input);
96+
app.Data = deserializer.Deserialize(input, options);
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98+
if (reader.BaseStream.Position != end)
99+
{
100+
throw new InvalidDataException();
101+
}
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74103
Apps.Add(app);
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} while (true);
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}
77106

78-
public static DateTime DateTimeFromUnixTime(uint unixTime)
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private static DateTime DateTimeFromUnixTime(uint unixTime)
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{
80109
return new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(unixTime);
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}
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112+
private static string ReadNullTermUtf8String(Stream stream)
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{
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var buffer = ArrayPool<byte>.Shared.Rent(32);
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try
117+
{
118+
var position = 0;
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120+
do
121+
{
122+
var b = stream.ReadByte();
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124+
if (b <= 0) // null byte or stream ended
125+
{
126+
break;
127+
}
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129+
if (position >= buffer.Length)
130+
{
131+
var newBuffer = ArrayPool<byte>.Shared.Rent(buffer.Length * 2);
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Buffer.BlockCopy(buffer, 0, newBuffer, 0, buffer.Length);
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ArrayPool<byte>.Shared.Return(buffer);
134+
buffer = newBuffer;
135+
}
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137+
buffer[position++] = (byte)b;
138+
}
139+
while (true);
140+
141+
return Encoding.UTF8.GetString(buffer[..position]);
142+
}
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finally
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{
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ArrayPool<byte>.Shared.Return(buffer);
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}
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}
82148
}
83149
}

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