[BUG] SyntaxError: Invalid magic, got b'(DV\x07'

[WinterPhoenix]

Description It looks like we've got a new VDF format rolling out for appinfo.vdf as part of the Steam Client Beta.

>>> from steam.utils.appcache import parse_appinfo
>>> header, apps = parse_appinfo(open(r"C:\Users\Winter\Desktop\WIP\appinfo.vdf", "rb"))

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\Python311_64\Lib\site-packages\steam\utils\appcache.py", line 71, in parse_appinfo
    raise SyntaxError("Invalid magic, got %s" % repr(magic))
SyntaxError: Invalid magic, got b'(DV\x07'

Here's an example appinfo.vdf with this issue: appinfo_0x07564428.zip

Versions Report

python -m steam.versions_report

```yaml steam: 1.4.3 Dependencies: vdf: 3.4 protobuf: 4.21.11 requests: 2.26.0 cachetools: 5.2.0 gevent: Not Installed gevent-eventemitter: Not Installed pycryptodomex: 3.16.0 enum34: Not Installed win-inet-pton: Not Installed Python runtime: executable: D:\Python311_64\python.exe version: 3.11.0 (main, Oct 24 2022, 18:26:48) [MSC v.1933 64 bit (AMD64)] platform: win32 System info: system: Windows machine: AMD64 release: 10 version: 10.0.19043 ```

Related Issues https://github.com/leovp/steamfiles/issues/22, https://github.com/Matoking/protontricks/issues/189

[rossengeorgiev]

Looks like they've changed the format

[rossengeorgiev]

Fix released in 1.4.4

[WinterPhoenix]

Thanks for the quick patch!