Daniel Bedeleanu
ea49cd6e4a
- Create backend/services/image_storage.py with 4 core functions:
- sanitize_filename(): remove unsafe chars, limit to 255 chars, convert to lowercase
- get_unique_filename(): handle collisions with UUID suffix (format: {name}_{uuid8}_{variant}.jpg)
- ensure_image_directories(): create /images/ root and category subdirs on startup
- save_image(): save bytes to /images/{category}/{filename}, returns relative path
- Create comprehensive test suite (22 tests) covering all functionality
- Integrate ensure_image_directories() into FastAPI startup event
- Directory structure: /images/{category}/{filename}
- Collision handling: auto-suffix with UUID if filename exists
- All tests passing, pathlib.Path for safe operations
103 lines
3.6 KiB
Python
103 lines
3.6 KiB
Python
"""
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pygments.lexers.hexdump
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~~~~~~~~~~~~~~~~~~~~~~~
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Lexers for hexadecimal dumps.
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:copyright: Copyright 2006-present by the Pygments team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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from pygments.lexer import RegexLexer, bygroups, include
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from pygments.token import Name, Number, String, Punctuation, Whitespace
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__all__ = ['HexdumpLexer']
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class HexdumpLexer(RegexLexer):
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"""
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For typical hex dump output formats by the UNIX and GNU/Linux tools ``hexdump``,
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``hd``, ``hexcat``, ``od`` and ``xxd``, and the DOS tool ``DEBUG``. For example:
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.. sourcecode:: hexdump
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00000000 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 |.ELF............|
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00000010 02 00 3e 00 01 00 00 00 c5 48 40 00 00 00 00 00 |..>......H@.....|
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The specific supported formats are the outputs of:
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* ``hexdump FILE``
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* ``hexdump -C FILE`` -- the `canonical` format used in the example.
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* ``hd FILE`` -- same as ``hexdump -C FILE``.
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* ``hexcat FILE``
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* ``od -t x1z FILE``
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* ``xxd FILE``
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* ``DEBUG.EXE FILE.COM`` and entering ``d`` to the prompt.
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"""
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name = 'Hexdump'
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aliases = ['hexdump']
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url = 'https://en.wikipedia.org/wiki/Hex_dump'
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version_added = '2.1'
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hd = r'[0-9A-Ha-h]'
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tokens = {
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'root': [
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(r'\n', Whitespace),
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include('offset'),
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(r'('+hd+r'{2})(\-)('+hd+r'{2})',
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bygroups(Number.Hex, Punctuation, Number.Hex)),
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(hd+r'{2}', Number.Hex),
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(r'(\s{2,3})(\>)(.{16})(\<)$',
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bygroups(Whitespace, Punctuation, String, Punctuation), 'bracket-strings'),
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(r'(\s{2,3})(\|)(.{16})(\|)$',
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bygroups(Whitespace, Punctuation, String, Punctuation), 'piped-strings'),
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(r'(\s{2,3})(\>)(.{1,15})(\<)$',
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bygroups(Whitespace, Punctuation, String, Punctuation)),
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(r'(\s{2,3})(\|)(.{1,15})(\|)$',
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bygroups(Whitespace, Punctuation, String, Punctuation)),
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(r'(\s{2,3})(.{1,15})$', bygroups(Whitespace, String)),
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(r'(\s{2,3})(.{16}|.{20})$', bygroups(Whitespace, String), 'nonpiped-strings'),
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(r'\s', Whitespace),
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(r'^\*', Punctuation),
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],
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'offset': [
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(r'^('+hd+'+)(:)', bygroups(Name.Label, Punctuation), 'offset-mode'),
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(r'^'+hd+'+', Name.Label),
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],
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'offset-mode': [
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(r'\s', Whitespace, '#pop'),
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(hd+'+', Name.Label),
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(r':', Punctuation)
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],
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'piped-strings': [
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(r'\n', Whitespace),
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include('offset'),
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(hd+r'{2}', Number.Hex),
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(r'(\s{2,3})(\|)(.{1,16})(\|)$',
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bygroups(Whitespace, Punctuation, String, Punctuation)),
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(r'\s', Whitespace),
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(r'^\*', Punctuation),
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],
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'bracket-strings': [
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(r'\n', Whitespace),
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include('offset'),
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(hd+r'{2}', Number.Hex),
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(r'(\s{2,3})(\>)(.{1,16})(\<)$',
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bygroups(Whitespace, Punctuation, String, Punctuation)),
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(r'\s', Whitespace),
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(r'^\*', Punctuation),
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],
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'nonpiped-strings': [
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(r'\n', Whitespace),
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include('offset'),
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(r'('+hd+r'{2})(\-)('+hd+r'{2})',
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bygroups(Number.Hex, Punctuation, Number.Hex)),
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(hd+r'{2}', Number.Hex),
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(r'(\s{19,})(.{1,20}?)$', bygroups(Whitespace, String)),
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(r'(\s{2,3})(.{1,20})$', bygroups(Whitespace, String)),
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(r'\s', Whitespace),
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(r'^\*', Punctuation),
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],
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}
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