燒瓶：如何擺脫導致500錯誤的pdfkit

Question

嘗試使用Flask應用程序的pdfkit創建.pdf文件時遇到錯誤。 該應用程序確實可以在本地計算機上運行。 當我嘗試在Digitalocean的Ubuntu 18.04 Droplet上運行代碼時，問題開始出現（Nginx用作Web服務器，Gunicorn（由主管協助）運行wsgi）。 那是我進入瀏覽器的錯誤（500）：

服務器遇到內部錯誤，無法完成您的請求。 服務器超載或應用程序中有錯誤。

那是Gunicorn錯誤日志中的錯誤：

[2019-07-27 14:44:56,969] ERROR in app: Exception on /store/resins/daylight/3 [POST]
Traceback (most recent call last):
  File "/home/slava/env/lib/python3.6/site-packages/flask/app.py", line 2292, in wsgi_app
    response = self.full_dispatch_request()
  File "/home/slava/env/lib/python3.6/site-packages/flask/app.py", line 1815, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/home/slava/env/lib/python3.6/site-packages/flask/app.py", line 1718, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/home/slava/env/lib/python3.6/site-packages/flask/_compat.py", line 35, in reraise
    raise value
  File "/home/slava/env/lib/python3.6/site-packages/flask/app.py", line 1813, in full_dispatch_request
    rv = self.dispatch_request()
  File "/home/slava/env/lib/python3.6/site-packages/flask/app.py", line 1799, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/home/slava/ag3d/ag3d/routes.py", line 184, in resin_store
    pdfkit.from_string(rendered, pdf_name, options = options)
  File "/home/slava/env/lib/python3.6/site-packages/pdfkit/api.py", line 72, in from_string
    return r.to_pdf(output_path)
  File "/home/slava/env/lib/python3.6/site-packages/pdfkit/pdfkit.py", line 159, in to_pdf
    raise IOError("wkhtmltopdf exited with non-zero code {0}. error:\n{1}".format(exit_code, stderr))
OSError: wkhtmltopdf exited with non-zero code 1. error:
qt.qpa.screen: QXcbConnection: Could not connect to display 
Could not connect to any X display.

這是應用程序使用pdfkit的方式：

options = {
  'page-size': 'A4',
  'margin-top': '0.75in',
  'margin-right': '0.75in',
  'margin-bottom': '0.75in',
  'margin-left': '0.75in',
}
rendered = render_template('order_doc.html', pdf_resin = pdf_resin)
pdfkit.from_string(rendered, pdf_name, options = options)

Answer 1

PDFKit軟件包使用wkhtmltopdf ，而后者又需要X Server來運行。 在Debian土地上，這通常需要xvfb-run包裝器。

headless_pdfkit軟件包試圖使jakewins提出的修補程序更易於使用。

您可以通過運行以下命令來安裝headless_pdfkit ：

pip install headless-pdfkit

從字符串保存一個簡單的PDF：

from headless_pdfkit import generate_pdf

ret = generate_pdf('<html></html>')
with open('output.pdf', 'wb') as w:
    w.write(ret)

options = {
    'auto_servernum': ''
}

ret = generate_pdf('<html></html>', options=options)
with open('output.pdf', 'wb') as w:
    w.write(ret)

燒瓶：如何擺脫導致500錯誤的pdfkit

問題描述

1 個解決方案

解決方案1
0 2019-07-28 20:18:43

燒瓶：如何擺脫導致500錯誤的pdfkit

問題描述

1 個解決方案

解決方案1 0 2019-07-28 20:18:43

解決方案1
0 2019-07-28 20:18:43