JSON keys not escaped

[SNisin]

I noticed that when running exiftool on json files with -j -struct, the keys will not be escaped in the output which can create invalid JSON output.

Example:

test.json

{
  "transform": {
    "\\.\"": "\\.\""
  }
}

Exiftool produces:

> .\exiftool.exe test.json -j -struct
[{
  "SourceFile": "test.json",
  "ExifToolVersion": 11.80,
  "FileName": "test.json",
  "Directory": ".",
  "FileSize": "46 bytes",
  "FileModifyDate": "2019:12:21 22:15:20+01:00",
  "FileAccessDate": "2019:12:21 22:15:20+01:00",
  "FileCreateDate": "2019:12:21 21:56:09+01:00",
  "FilePermissions": "rw-rw-rw-",
  "FileType": "JSON",
  "FileTypeExtension": "json",
  "MIMEType": "application/json",
  "Transform": {
    "\."": "\\.\""
  }
}]

As you can see "\."" is invalid JSON as both \ and " are not escaped.

[boardhead]

Thanks for this report. I'll fix this in the next release.

• Phil

[boardhead]

This should be fixed in the most recent release: 4ab0216