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
97 lines
2.6 KiB
Python
97 lines
2.6 KiB
Python
#
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# This file is part of pyasn1-modules software.
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#
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# Copyright (c) 2005-2020, Ilya Etingof <etingof@gmail.com>
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# License: http://snmplabs.com/pyasn1/license.html
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#
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# SNMPv1 message syntax
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#
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# ASN.1 source from:
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# http://www.ietf.org/rfc/rfc1155.txt
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#
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# Sample captures from:
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# http://wiki.wireshark.org/SampleCaptures/
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#
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from pyasn1.type import constraint
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from pyasn1.type import namedtype
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from pyasn1.type import tag
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from pyasn1.type import univ
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class ObjectName(univ.ObjectIdentifier):
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pass
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class SimpleSyntax(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('number', univ.Integer()),
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namedtype.NamedType('string', univ.OctetString()),
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namedtype.NamedType('object', univ.ObjectIdentifier()),
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namedtype.NamedType('empty', univ.Null())
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)
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class IpAddress(univ.OctetString):
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tagSet = univ.OctetString.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 0)
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)
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subtypeSpec = univ.Integer.subtypeSpec + constraint.ValueSizeConstraint(
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4, 4
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)
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class NetworkAddress(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('internet', IpAddress())
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)
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class Counter(univ.Integer):
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tagSet = univ.Integer.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 1)
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)
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subtypeSpec = univ.Integer.subtypeSpec + constraint.ValueRangeConstraint(
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0, 4294967295
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)
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class Gauge(univ.Integer):
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tagSet = univ.Integer.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 2)
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)
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subtypeSpec = univ.Integer.subtypeSpec + constraint.ValueRangeConstraint(
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0, 4294967295
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)
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class TimeTicks(univ.Integer):
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tagSet = univ.Integer.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 3)
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)
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subtypeSpec = univ.Integer.subtypeSpec + constraint.ValueRangeConstraint(
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0, 4294967295
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)
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class Opaque(univ.OctetString):
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tagSet = univ.OctetString.tagSet.tagImplicitly(
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tag.Tag(tag.tagClassApplication, tag.tagFormatSimple, 4)
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)
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class ApplicationSyntax(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('address', NetworkAddress()),
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namedtype.NamedType('counter', Counter()),
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namedtype.NamedType('gauge', Gauge()),
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namedtype.NamedType('ticks', TimeTicks()),
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namedtype.NamedType('arbitrary', Opaque())
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)
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class ObjectSyntax(univ.Choice):
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componentType = namedtype.NamedTypes(
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namedtype.NamedType('simple', SimpleSyntax()),
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namedtype.NamedType('application-wide', ApplicationSyntax())
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)
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