[NTG-context] externalfigure regression?

[NTG-context] externalfigure regression?

[Thangalin]

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Hi,

>From the wiki <https://wiki.contextgarden.net/Command/externalfigure>:

"When the file extension is .auto or method=auto is used, ConTeXt reads the
first few bytes of the file to determine the filetype. Such an
auto-discovery is useful for remote images that do not have a file
extension."

current version: 2023.09.26 18:19

Code:

% SOT
\starttext
  \startplacefigure
    \externalfigure[https://placekitten.com/408/287][method=auto]
  \stopplacefigure
\stoptext
% EOT

Expected: Cute kitten photo.
Actual: Error.

Is this a regression? Or has the syntax changed (stale wiki)?

Specifying the type works (I'd've thought it not necessary to specify the
method at all, given both magic headers and HTTP content-type could
determine the type):

% SOT
\starttext
  \startplacefigure
    \externalfigure[https://placekitten.com/408/287][method=jpg]
  \stopplacefigure
\stoptext
% EOT

See also:

https://gitlab.com/DaveJarvis/KeenWrite/-/blob/main/src/main/java/com/keenwrite/io/MediaTypeSniffer.java#L53

https://gitlab.com/DaveJarvis/KeenWrite/-/blob/main/src/main/java/com/keenwrite/io/MediaType.java#L218

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