Wkhtmltopdf（pdfkit）QXcbConnection:无法连接到display

Question

我正在做一个Django项目，我们从HTML模板生成PDF文件。我使用django-pdfkit呈现PDF。在

在我的Ubuntu 16.04上，一切正常，但当我在DigitalOcean Ubuntu16.04服务器上部署项目时，它会引发错误：

IOError at /render/doklad/ wkhtmltopdf exited with non-zero code -6. error:

QXcbConnection: Could not connect to display

我试着安装

sudo apt-get install libxrender1 fontconfig xvfb

将WKHTMLTOPDF_BIN变量设置为正确的路径。在

已将gunicorn用户更改为根用户。在

pip install wkhtmltopdf

什么也帮不了你，你知道我能做些什么来解决这个问题吗？在

编辑：

我发现，如果我以根用户身份执行此命令，它将正常工作：

^{pr2}$

但问题是如果我使用djangouser运行命令。它返回相同的结果：

QXcbConnection: Could not connect to display 
Aborted (core dumped)

所以我试图改变gunicorn.service，这样gunicorn运行在root而不是{}下，但是没有帮助。在

http://mypage/render/doklad/?id=1 

返回相同的错误。在

此文件中似乎出现了错误：

https://github.com/JazzCore/python-pdfkit/blob/master/pdfkit/pdfkit.py

这是一个回溯：

Aug 25 04:42:46 homeit-generator-faktur-beta gunicorn[29032]:  - - [25/Aug/2017:04:42:46 +0000] "GET / HTTP/1.0" 302 - "-" "Mozilla/5.0"
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]: Internal Server Error: /render/doklad/
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]: Traceback (most recent call last):
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django/cor
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     response = get_response(request)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django/cor
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     response = self.process_exception_by_middleware(e, request)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django/cor
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     response = wrapped_callback(request, *callback_args, **callback_kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django/vie
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     return self.dispatch(request, *args, **kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django/vie
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     return handler(request, *args, **kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/dashboard/views.py", line 186, in get
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     return super(DokladToPdf, self).get(*args, **kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django_pd
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     content = self.render_pdf(*args, **kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/django_pd
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     pdf = pdfkit.from_string(html, False, options, **kwargs)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/pdfkit/ap
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     return r.to_pdf(output_path)
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:   File "/home/django/homeit/homeitvenv/local/lib/python2.7/site-packages/pdfkit/pd
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:     raise IOError("wkhtmltopdf exited with non-zero code {0}. error:\n{1}".format(
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]: IOError: wkhtmltopdf exited with non-zero code -6. error:
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]: QXcbConnection: Could not connect to display
Aug 25 06:05:55 homeit-generator-faktur-beta gunicorn[29032]:  - - [25/Aug/2017:06:05:55 +0000] "GET /render/doklad/?id=1 HTTP/1.0" 500 108058 "

Answer 1

您是否正在通过xvfb-run运行命令？在

在调用代码中，您可能需要将对wkhtmltopdf的直接调用替换为如下所示：

xvfb-run -a -s "-screen 0 1024x768x16" /path/to/bin/wkhtmltopdf