Refine validation rule for HTAN filenames

[adamjtaylor]

From Regex 101

/
^(([a-zA-Z0-9_-.+(') ]+/)[a-zA-Z0-9_-.+(')]+)$
/
gm
^ asserts position at start of a line
1st Capturing Group (([a-zA-Z0-9_-.+(') ]+/)[a-zA-Z0-9_-.+(')]+)
2nd Capturing Group ([a-zA-Z0-9_-.+(') ]+/)*

• matches the previous token between zero and unlimited times, as many times as possible, giving back as needed (greedy)
  A repeated capturing group will only capture the last iteration. Put a capturing group around the repeated group to capture all iterations or use a non-capturing group instead if you're not interested in the data
  Match a single character present in the list below [a-zA-Z0-9_-.+(') ]

• matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
  a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)
  A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
  0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
  _ matches the character _ with index 9510 (5F16 or 1378) literally (case sensitive)
  - matches the character - with index 4510 (2D16 or 558) literally (case sensitive)
  . matches the character . with index 4610 (2E16 or 568) literally (case sensitive)
  + matches the character + with index 4310 (2B16 or 538) literally (case sensitive)
  ( matches the character ( with index 4010 (2816 or 508) literally (case sensitive)
  ' matches the character ' with index 3910 (2716 or 478) literally (case sensitive)
  ) matches the character ) with index 4110 (2916 or 518) literally (case sensitive)
  matches the character with index 3210 (2016 or 408) literally (case sensitive)
  / matches the character / with index 4710 (2F16 or 578) literally (case sensitive)
  Match a single character present in the list below [a-zA-Z0-9_-.+(')]
• matches the previous token between one and unlimited times, as many times as possible, giving back as needed (greedy)
  a-z matches a single character in the range between a (index 97) and z (index 122) (case sensitive)
  A-Z matches a single character in the range between A (index 65) and Z (index 90) (case sensitive)
  0-9 matches a single character in the range between 0 (index 48) and 9 (index 57) (case sensitive)
  _ matches the character _ with index 9510 (5F16 or 1378) literally (case sensitive)
  - matches the character - with index 4510 (2D16 or 558) literally (case sensitive)
  . matches the character . with index 4610 (2E16 or 568) literally (case sensitive)
  + matches the character + with index 4310 (2B16 or 538) literally (case sensitive)
  ( matches the character ( with index 4010 (2816 or 508) literally (case sensitive)
  ') matches a single character in the list ') (case sensitive)
  $ asserts position at the end of a line

[adamjtaylor]

Need to confirm synapse and s3 valid characters and list here.

[adamjtaylor]

From S3 docs

The following character sets are generally safe for use in key names.

Alphanumeric characters	0-9a-zA-Z
Special characters	Exclamation point (!)Hyphen (-)Underscore (_)Period (.)Asterisk (*)Single quote (')Open parenthesis (()Close parenthesis ())

[adamjtaylor]

Some minimal testing with regex101