MrBlake/NetBox-Export
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fix: resize oversized image attachments during import

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MrBlake
2026-08-05 15:56:09 +02:00
parent 80469ede34
commit 05e33a87a9
6 changed files with 163 additions and 18 deletions
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netbox_export/__init__.py
+1 -1
View File
@@ -7,7 +7,7 @@ class NetBoxExportConfig(PluginConfig):
name = "netbox_export"
verbose_name = "NetBox-Export"
description = "Portable ZIP export and import for tenants and locations"
version = "0.3.10"
version = "0.3.11"
author = "NetBox Export contributors"
base_url = "netbox-export"
min_version = "4.6.0"
netbox_export/services/exporter.py
+1 -1
View File
@@ -39,7 +39,7 @@ def export_scope(
"created_at": datetime.now(UTC).isoformat(),
"source_instance": str(InstanceIdentity.local_id()),
"source_netbox_version": getattr(getattr(settings, "RELEASE", None), "version", "4.6"),
"plugin_version": "0.3.10",
"plugin_version": "0.3.11",
"scope": {
"type": scope_type,
"source_pk": str(scope_id),
netbox_export/services/importer.py
+115 -14
View File
@@ -1,7 +1,11 @@
from __future__ import annotations
import io
import logging
import math
import threading
import uuid
import warnings
from dataclasses import dataclass
from dataclasses import field as dataclass_field
from decimal import Decimal
@@ -10,8 +14,8 @@ from django.apps import apps
from django.conf import settings
from django.contrib.contenttypes.models import ContentType
from django.core.files.base import ContentFile
from django.core.files.images import get_image_dimensions
from django.db import IntegrityError, models, transaction
from PIL import Image as PillowImage
from netbox_export.models import ImportedObjectMapping
@@ -53,6 +57,11 @@ EXPLICIT_IDENTITIES = {
"virtualization.vminterface": ("virtual_machine", "name"),
}
NETBOX_IMAGE_MAX_PIXELS = 25_000_000
IMPORTED_IMAGE_TARGET_PIXELS = 20_000_000
IMPORTED_IMAGE_SOURCE_MAX_PIXELS = 100_000_000
_IMAGE_LIMIT_LOCK = threading.Lock()
class IdentityNotReady(Exception):
pass
@@ -462,33 +471,118 @@ def _set_generic_relations(obj, record, resolver, *, allow_deferred: bool):
return unresolved, missing_required
def _set_files(obj, record, assets, saved_files, *, dry_run: bool):
def _open_image_with_bounded_override(data):
stream = io.BytesIO(data)
try:
with warnings.catch_warnings():
warnings.simplefilter("error", PillowImage.DecompressionBombWarning)
image = PillowImage.open(stream)
return stream, image
except (PillowImage.DecompressionBombError, PillowImage.DecompressionBombWarning):
stream.close()
except Exception:
stream.close()
raise
stream = io.BytesIO(data)
with _IMAGE_LIMIT_LOCK:
original_limit = PillowImage.MAX_IMAGE_PIXELS
PillowImage.MAX_IMAGE_PIXELS = IMPORTED_IMAGE_SOURCE_MAX_PIXELS
try:
with warnings.catch_warnings():
warnings.simplefilter("ignore", PillowImage.DecompressionBombWarning)
image = PillowImage.open(stream)
except PillowImage.DecompressionBombError as exc:
stream.close()
raise ArchiveValidationError(
"Das Bild überschreitet die sichere Importgrenze von "
f"{IMPORTED_IMAGE_SOURCE_MAX_PIXELS:,} Pixeln."
) from exc
except Exception:
stream.close()
raise
finally:
PillowImage.MAX_IMAGE_PIXELS = original_limit
return stream, image
def _resized_image_save_options(image_format, image):
options = {}
if icc_profile := image.info.get("icc_profile"):
options["icc_profile"] = icc_profile
if image_format in ("JPEG", "MPO"):
options.update(quality=85, optimize=True, progressive=True)
elif image_format == "WEBP":
options.update(quality=85, method=4)
elif image_format in ("PNG", "GIF"):
options["optimize"] = True
elif image_format == "TIFF":
options["compression"] = "tiff_deflate"
return options
def _prepare_image_asset(data):
stream, image = _open_image_with_bounded_override(data)
try:
width, height = image.size
source_pixels = width * height
if source_pixels > IMPORTED_IMAGE_SOURCE_MAX_PIXELS:
raise ArchiveValidationError(
f"Das Bild mit {source_pixels:,} Pixeln überschreitet die sichere Importgrenze von "
f"{IMPORTED_IMAGE_SOURCE_MAX_PIXELS:,} Pixeln."
)
if source_pixels <= NETBOX_IMAGE_MAX_PIXELS:
return data, width, height, None
scale = math.sqrt(IMPORTED_IMAGE_TARGET_PIXELS / source_pixels)
target_size = (max(1, math.floor(width * scale)), max(1, math.floor(height * scale)))
image.thumbnail(target_size, PillowImage.Resampling.LANCZOS, reducing_gap=3.0)
image_format = image.format or "PNG"
if image_format == "MPO":
image_format = "JPEG"
output = io.BytesIO()
image.save(output, format=image_format, **_resized_image_save_options(image_format, image))
resized_width, resized_height = image.size
resize_info = (width, height, resized_width, resized_height)
return output.getvalue(), resized_width, resized_height, resize_info
finally:
image.close()
stream.close()
def _set_files(obj, record, assets, saved_files, *, dry_run: bool, import_warnings=None):
for name, spec in record.get("files", {}).items():
if not spec or "path" not in spec or spec["path"] not in assets:
continue
filename = spec.get("name", spec["path"]).replace("\\", "/").rsplit("/", 1)[-1]
field = obj._meta.get_field(name)
content = ContentFile(assets[spec["path"]])
dimensions = None
content_data = assets[spec["path"]]
dimensions = (None, None)
if isinstance(field, models.ImageField):
dimensions = get_image_dimensions(content)
content.seek(0)
width, height = dimensions
content_data, width, height, resize_info = _prepare_image_asset(content_data)
dimensions = (width, height)
if field.width_field and width is not None:
setattr(obj, field.width_field, width)
if field.height_field and height is not None:
setattr(obj, field.height_field, height)
if resize_info is not None and import_warnings is not None:
old_width, old_height, new_width, new_height = resize_info
record_id = record.get("id", obj._meta.label_lower)
import_warnings.append(
f"Bild für {record_id} wurde von {old_width}×{old_height} auf "
f"{new_width}×{new_height} Pixel verkleinert."
)
if dry_run:
continue
content = ContentFile(content_data)
file_value = getattr(obj, name)
file_value.save(filename, content, save=False)
saved_files.append((file_value.storage, file_value.name))
if dimensions is not None:
width, height = dimensions
if field.width_field and width is not None:
setattr(obj, field.width_field, width)
if field.height_field and height is not None:
setattr(obj, field.height_field, height)
width, height = dimensions
if isinstance(field, models.ImageField) and field.width_field and width is not None:
setattr(obj, field.width_field, width)
if isinstance(field, models.ImageField) and field.height_field and height is not None:
setattr(obj, field.height_field, height)
def _cleanup_files(saved_files):
@@ -594,7 +688,14 @@ def import_archive(parsed: ParsedArchive, *, conflict_strategy: str, dry_run: bo
pending.pop(record_id)
progressed = True
continue
_set_files(obj, record, parsed.assets, saved_files, dry_run=dry_run)
_set_files(
obj,
record,
parsed.assets,
saved_files,
dry_run=dry_run,
import_warnings=report.warnings,
)
if device_placement is not None:
_stage_device_placement(obj)
compatibility.prepare_initial_save(obj, is_new=existing is None)