Updated script that can be controled by Nodejs web app

lib/python3.13/site-packages/openpyxl/reader/drawings.py

@@ -0,0 +1,71 @@
+
+# Copyright (c) 2010-2024 openpyxl
+
+
+from io import BytesIO
+from warnings import warn
+
+from openpyxl.xml.functions import fromstring
+from openpyxl.xml.constants import IMAGE_NS
+from openpyxl.packaging.relationship import (
+    get_rel,
+    get_rels_path,
+    get_dependents,
+)
+from openpyxl.drawing.spreadsheet_drawing import SpreadsheetDrawing
+from openpyxl.drawing.image import Image, PILImage
+from openpyxl.chart.chartspace import ChartSpace
+from openpyxl.chart.reader import read_chart
+
+
+def find_images(archive, path):
+    """
+    Given the path to a drawing file extract charts and images
+
+    Ignore errors due to unsupported parts of DrawingML
+    """
+
+    src = archive.read(path)
+    tree = fromstring(src)
+    try:
+        drawing = SpreadsheetDrawing.from_tree(tree)
+    except TypeError:
+        warn("DrawingML support is incomplete and limited to charts and images only. Shapes and drawings will be lost.")
+        return [], []
+
+    rels_path = get_rels_path(path)
+    deps = []
+    if rels_path in archive.namelist():
+        deps = get_dependents(archive, rels_path)
+
+    charts = []
+    for rel in drawing._chart_rels:
+        try:
+            cs = get_rel(archive, deps, rel.id, ChartSpace)
+        except TypeError as e:
+            warn(f"Unable to read chart {rel.id} from {path} {e}")
+            continue
+        chart = read_chart(cs)
+        chart.anchor = rel.anchor
+        charts.append(chart)
+
+    images = []
+    if not PILImage: # Pillow not installed, drop images
+        return charts, images
+
+    for rel in drawing._blip_rels:
+        dep = deps.get(rel.embed)
+        if dep.Type == IMAGE_NS:
+            try:
+                image = Image(BytesIO(archive.read(dep.target)))
+            except OSError:
+                msg = "The image {0} will be removed because it cannot be read".format(dep.target)
+                warn(msg)
+                continue
+            if image.format.upper() == "WMF": # cannot save
+                msg = "{0} image format is not supported so the image is being dropped".format(image.format)
+                warn(msg)
+                continue
+            image.anchor = rel.anchor
+            images.append(image)
+    return charts, images