python - apache 2 和 flask，reportlab registerFont "TTFError: Can' t 打开文件 ...“但在开发服务器上工作

Question

我是 python 的新手，我正在尝试让 flask 微框架与 apache 一起工作。我正在使用以下文章中所述的 wsgi 设置说明: https://www.digitalocean.com/community/articles/how-to-deploy-a-flask-application-on-an-ubuntu-vps

不幸的是，虽然应用程序工作正常，但在尝试使用 reportlab 生成 pdf 时，我收到以下错误(从 apache 日志中提取)

[Thu Jan 09 22:47:44 2014] [error] ERROR:flaskapp:Exception on /print/0 [GET]
[Thu Jan 09 22:47:44 2014] [error] Traceback (most recent call last):
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1817, in wsgi_app
[Thu Jan 09 22:47:44 2014] [error]     response = self.full_dispatch_request()
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1477, in full_dispatch_request
[Thu Jan 09 22:47:44 2014] [error]     rv = self.handle_user_exception(e)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1381, in handle_user_exception
[Thu Jan 09 22:47:44 2014] [error]     reraise(exc_type, exc_value, tb)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1475, in full_dispatch_request
[Thu Jan 09 22:47:44 2014] [error]     rv = self.dispatch_request()
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1461, in dispatch_request
[Thu Jan 09 22:47:44 2014] [error]     return self.view_functions[rule.endpoint](**req.view_args)
[Thu Jan 09 22:47:44 2014] [error]   File "/var/www/flaskapp/flaskapp/__init__.py", line 124, in print_rep
[Thu Jan 09 22:47:44 2014] [error]     registerFont(TTFont('DroidSans', 'DroidSans.ttf'))
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 1009, in __init__
[Thu Jan 09 22:47:44 2014] [error]     self.face = TTFontFace(filename, validate=validate, subfontIndex=subfontIndex)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 915, in __init__
[Thu Jan 09 22:47:44 2014] [error]     TTFontFile.__init__(self, filename, validate=validate, subfontIndex=subfontIndex)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 412, in __init__
[Thu Jan 09 22:47:44 2014] [error]     TTFontParser.__init__(self, file, validate=validate,subfontIndex=subfontIndex)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 189, in __init__
[Thu Jan 09 22:47:44 2014] [error]     self.readFile(file)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 263, in readFile
[Thu Jan 09 22:47:44 2014] [error]     self.filename, f = TTFOpenFile(f)
[Thu Jan 09 22:47:44 2014] [error]   File "/usr/local/lib/python2.7/dist-packages/reportlab/pdfbase/ttfonts.py", line 175, in TTFOpenFile
[Thu Jan 09 22:47:44 2014] [error]     raise TTFError('Can\\'t open file "%s"' % fn)
[Thu Jan 09 22:47:44 2014] [error] TTFError: Can't open file "DroidSans.ttf"

看起来registerFont 无法访问该字体。

在开发服务器上运行它，它工作正常。

我尝试了几个位置，甚至将字体放在 reportlab 文件夹内的字体文件夹中，但仍然没有。查看了这篇建议 fast_cgi(用于 Django)的文章，但我不确定这是否能解决我的问题。

python reportlab - registerFont - django - font not available after some time

有什么想法吗？谢谢

Answer 1

字体文件必须在reportlab.rl_config.TTFSearchpath(搜索路径列表)声明的路径中

尝试输出列表内容。

而且，不，使用 Django 切换到 fast_cgi 不会让您明白哪里出了问题。