Encontré un pequeño error al subir un archivo:
Si el archivo comienza y termina con guion bajo (_test_file_.txt en este caso), el código de generación de marcado no escapa el guion bajo, lo que resulta en el siguiente “nombre de archivo”:test_file .txt|attachment
[_test_file_.txt|attachment](upload://eSJGButIpkpu4IEifmmispiFRJu.txt) (23 Bytes)
Si escapo el primer guion bajo con una barra invertida, se analiza correctamente:
_test_file_.txt (23 Bytes)
[\_test_file_.txt|attachment](upload://eSJGButIpkpu4IEifmmispiFRJu.txt) (23 Bytes)
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Gracias por el informe @ValdikSS
main ← fix/escape-markdown-in-upload-filenames
opened 02:33PM - 07 Apr 26 UTC
Filenames containing markdown formatting characters (`_`, `*`, `~`, `` ` ``, `[`… , `]`, `|`) would break upload markup when cooked. For example, uploading `_test_file_.txt` generated:
[_test_file_.txt|attachment](upload://...)
The underscores triggered emphasis parsing inside the link text, which both rendered the filename incorrectly (with italics) and prevented the `|attachment` marker from being recognized — losing the `class="attachment"` on the resulting `<a>` tag.
**Markdown generation (defense in depth)**
Add `escapeMarkdownCharacters` (JS) and `UploadMarkdown.escape_markdown` (Ruby) to backslash-escape all inline formatting characters in filenames before embedding them in markdown link text. Applied in:
- `UploadMarkdown` — image, attachment, and playable media methods
- `uploads.js` — `attachmentMarkdown` and `markdownNameFromFileName`
- `inline_uploads.rb` — HTML anchor conversion and hotlinked image URLs
- `to-markdown.js` — HTML-to-markdown attachment link reconstruction
- `sanitizeAlt` in `markdown-image-builder.js` — image alt text
**Parser resilience (belt and suspenders)**
The markdown-it `renderAttachment` renderer and ProseMirror's link parser both assumed `tokens[idx+1]` was a single text token containing the full link text. When emphasis/bold/strikethrough/code was parsed inside the link text, the token sequence included formatting tokens and the `|attachment` marker was lost. Both now scan forward through all tokens between `link_open` and `link_close` to find the marker.
The image renderer (`renderImageOrPlayableMedia`) split alt text on `|` assuming the first segment was always the alt and everything after was structured suffixes (dimensions, video/audio, data attributes). A pipe in the filename would produce extra segments that confused the dimension parser. It now scans from the right, consuming known suffixes, and treats everything remaining as alt text.
https://meta.discourse.org/t/400079
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Aquí tienes un intento de solucionar esto de una vez por todas