是否可以在 Python 中的 Azure Function Linux 消耗计划中保存临时文件?

2022-01-17 00:00:00 python file permissions azure-functions save

问题描述

首先对不起我的英语.我有一个使用 Python 的 Azure Function Linux 消耗计划，我需要生成一个 html，使用 wkhtmltopdf 转换为 pdf 并通过电子邮件发送.

first of all sorry for my English. I have an Azure Function Linux Consuption Plan using Python and I need to generate an html, transform to pdf using wkhtmltopdf and send it by email.

 #generate temporally pdf
config = pdfkit.configuration(wkhtmltopdf="binary/wkhtmltopdf")
pdfkit.from_string(pdf_content, 'report.pdf',configuration=config, options={})

#read pdf and transform to Bytes
with open('report.pdf', 'rb') as f:
    data = f.read()

#encode bytes
encoded = base64.b64encode(data).decode()

#Send Email
EmailSendData.sendEmail(html_content,encoded,spanish_month)

代码在我的本地开发中运行正常，但是当我部署函数并执行代码时，我收到一条错误消息:

Code is running ok in my local development but when I deploy the function and execute the code I am getting an error saying:

Result: Failure Exception: OSError: wkhtmltopdf reported an error: Loading pages (1/6) [> ] 0% [======> ] 10% [==============================> ] 50% [============================================================] 100% QPainter::begin(): Returned false Error: Unable to write to destination

我认为报告错误是因为出于任何原因写权限不可用.你能帮我解决这个问题吗?

I think that error is reported because for any reason write permission is not available. Can you help me to solve this problem?

提前致谢.

解决方案

tempfile.gettempdir()方法返回一个临时文件夹，在Linux上是/tmp.您的应用程序可以使用此目录来存储临时文件由您的函数在执行期间生成和使用.

The tempfile.gettempdir() method returns a temporary folder, which on Linux is /tmp. Your application can use this directory to store temporary files generated and used by your functions during execution.

所以使用/tmp/report.pdf作为文件目录来保存临时文件.

So use /tmp/report.pdf as the file directory to save temporary file.

with open('/tmp/report.pdf', 'rb') as f:
    data = f.read()

有关更多详细信息，您可以参考此 文章.

For more details, you could refer to this article.

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