GCP App Engine StorageのExcelファイル読込、内容変更、書込

やりたいこと

1. GCP StorageからExcelファイル読込
2. Excel内容変更
3. GCP StorageにExcelファイル書込
4. ファイルダウンロード

Example

# -*- coding: utf-8 -*-
import logging
from flask import render_template, Flask, Response
from google.cloud import storage
import openpyxl
from openpyxl.writer.excel import save_virtual_workbook
import io

app = Flask(__name__)

logging.getLogger().setLevel(logging.INFO)


@app.route('/applicationform/a0026', methods=['GET', 'POST'])
def a0026():
    client = storage.Client()
    bucket = client.get_bucket('★プロジェクト名★.appspot.com')
    blob = bucket.blob('a0025.xlsx')
    blob_io = io.BytesIO(blob.download_as_string())
    wb = openpyxl.load_workbook(blob_io, keep_vba=False)
    sheet = wb.get_sheet_by_name('★シート名★')
    sheet['K5'] = 'Test Test'
    save_data = save_virtual_workbook(wb)
    new_blob = bucket.blob('a0025_new.xlsx')
    new_blob.upload_from_string(save_data, content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
    res = Response(save_data, content_type='application/vnd.openxmlformats-officedocument.spreadsheetml.sheet')
    res.headers['Content-Disposition'] = 'attachment; filename="a0025_new.xlsx"'

    return res


if __name__ == '__main__':
    app.run(host='127.0.0.1', port=8080, debug=True)

マクロ有のファイルの場合

keep_vbaをTrueにする。

wb = openpyxl.load_workbook(blob_io, keep_vba=True)

Content-Type「application/vnd.ms-excel.sheet.macroEnabled.12」に変更

new_blob.upload_from_string(save_data, content_type='application/vnd.ms-excel.sheet.macroEnabled.12')
res = Response(save_data, content_type='application/vnd.ms-excel.sheet.macroEnabled.12')

拡張子変更

new_blob = bucket.blob('a0025_new.xlsm')
res.headers['Content-Disposition'] = 'attachment; filename="a0025_new.xlsm"'

memo

• Excel処理はOpenPyXL使用