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cove: add check for large number of XLSX sheet rows
This commit fixes an issue where XLSX spreadsheets with a malformed number of rows generate very large unflattened JSON files. The fix simply checks for an excessive number of rows before passing off to cove/flattentool. The number of rows considered excessive is controllable through the MAX_XLSX_ROWS environment variable and set by default to 50000.
1 parent 5e2cc9c commit 783b746

5 files changed

Lines changed: 49 additions & 24 deletions

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‎cove/cove_360/fixtures/badfile_too_many_rows.xlsx‎

302 KB
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‎cove/cove_360/fixtures/badfile_too_many_rows_multiple_sheets.xlsx‎

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‎cove/cove_360/tests/test_browser.py‎

Lines changed: 10 additions & 24 deletions
Original file line numberDiff line numberDiff line change
@@ -150,31 +150,17 @@ def server_url(request, live_server):
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'bad currency',
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], True),
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('badfile_all_validation_errors_4_times.xlsx', [
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'Description is missing but required (more info about this error)',
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'id is missing but required within recipientOrganization (more info about this error)',
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'Date is not in the correct format (more info about this error)',
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'Amount Awarded is not a number. Check that the value is not null, and doesn’t contain any characters other than 0-9 and dot (.). Number values should not be in quotes.',
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'Invalid \'uri\' found (more info about this error)',
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'Invalid code found in Currency (more info about this error)',
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'[] is too short. You must supply at least one value, or remove the item entirely (unless it’s required).',
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# Context dates should be ISO formatted
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'2019-06-01T00:00:00+00:00',
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'bad date 1',
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'bad date 2',
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'bad date 3',
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'bad date 4',
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'This should be a number',
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'This should be a uri 1',
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'This should be a uri 2',
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# 'This should be a uri 3',
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'This should be a uri 5',
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'This should be a uri 6',
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# 'This should be a uri 7',
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'bad currency 1',
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'bad currency 2',
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'bad currency 3',
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'bad currency 4',
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'',
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], True),
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('badfile_too_many_rows.xlsx', [
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'This XLSX workbook has a worksheet (grants) with 50001 rows '
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'but the maximum number of rows supported by this tool is 50000'
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], False),
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('badfile_too_many_rows_multiple_sheets.xlsx', [
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'This XLSX workbook has worksheets with a larger number of rows '
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'than is supported by this tool (50000). Worksheets with too many rows: '
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'\'grants\' (50001 rows), \'grants_2\' (50002 rows)'
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], False),
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("dei_extension.xlsx", [
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"do not use the 360Giving Data Standard codelists correctly.",
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], True),

‎cove/cove_360/views.py‎

Lines changed: 37 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -5,6 +5,7 @@
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import logging
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import re
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import os
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import zipfile
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from decimal import Decimal
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from cove.views import explore_data_context, cove_web_input_error
@@ -17,6 +18,8 @@
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from django.utils.translation import gettext_lazy as _
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from django.core.cache import cache
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import openpyxl
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from libcove.config import LibCoveConfig
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from libcove.lib.converters import convert_spreadsheet, convert_json
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from libcove.lib.exceptions import CoveInputDataError
@@ -145,6 +148,40 @@ def explore_360(request, pk, template='cove_360/explore.html'):
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lib_cove_config=lib_cove_config))
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else:
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if file_type == "xlsx":
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# Check for an excessive number of rows before passing to flattentool.
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excessive_sheets = {}
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try:
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workbook = openpyxl.reader.excel.load_workbook(file_name, read_only=True)
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excessive_sheets = {
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sheetname: workbook[sheetname].max_row
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for sheetname in workbook.sheetnames
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if workbook[sheetname].max_row > settings.MAX_XLSX_ROWS
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}
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except (zipfile.BadZipFile, openpyxl.utils.exceptions.InvalidFileException):
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# Exceptions associated with invalid spreadsheets are passed through for cove to handle.
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pass
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if len(excessive_sheets) == 1:
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sheetname = next(iter(excessive_sheets))
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wrapped_err = f"This XLSX workbook has a worksheet ({sheetname}) with " \
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f"{excessive_sheets[sheetname]} rows " \
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f"but the maximum number of rows supported by this tool is {settings.MAX_XLSX_ROWS}"
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raise CoveInputDataError(wrapped_err=wrapped_err)
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elif len(excessive_sheets) > 1:
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wrapped_err = "This XLSX workbook has worksheets with a larger number of rows " \
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f"than is supported by this tool ({settings.MAX_XLSX_ROWS}). " \
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"Worksheets with too many rows: "
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wrapped_err += ", ".join(
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[
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f"'{sheetname}' ({num_rows} rows)"
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for sheetname, num_rows in excessive_sheets.items()
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]
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)
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raise CoveInputDataError(wrapped_err=wrapped_err)
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# Convert spreadsheet to json
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context.update(convert_spreadsheet(upload_dir, upload_url, file_name, file_type, lib_cove_config, schema_360.schema_file,
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schema_360.pkg_schema_file))

‎cove/cove_project/settings.py‎

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Original file line numberDiff line numberDiff line change
@@ -12,6 +12,7 @@
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MEDIA_URL=(str, "/media/"),
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STATIC_ROOT=(str, os.path.join(BASE_DIR, "static")),
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STATIC_URL=(str, "/static/"),
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MAX_XLSX_ROWS=(int, 50000),
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)
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# We use the setting to choose whether to show the section about Sentry in the
@@ -35,6 +36,7 @@
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SECRET_KEY = settings.SECRET_KEY
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DEBUG = settings.DEBUG
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ALLOWED_HOSTS = settings.ALLOWED_HOSTS
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MAX_XLSX_ROWS = env("MAX_XLSX_ROWS")
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MIDDLEWARE = (
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'django.contrib.sessions.middleware.SessionMiddleware',

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