Question

我正在将python中的HTML文件转换为pdf并将这些pdf文件附加到邮件中并进行处理

我已经为Windows安装了pdfkit（0.6.1），wkhtmltopdf（0.2）和wkhtmltopdf。并添加了wkhtmltopdf bin路径。它可以在我的本地系统中正常工作，这是我的代码
```
url=""
PDF = pdfkit.from_url(url, False)
result= SendPDFtomail(PDF)
return result 
```
当我尝试通过添加wkhtmltopdf的buildpack和我的应用程序的buildpack将相同的代码推送到heroku中时，
```
  1. heroku/python
  2. https://github.com/dscout/wkhtmltopdf-buildpack.git
```

当我将构建推送到heroku时

   git push heroku master
   Counting objects: 3, done.
   Delta compression using up to 4 threads.
   Compressing objects: 100% (3/3), done.
   Writing objects: 100% (3/3), 336 bytes | 84.00 KiB/s, done.
   Total 3 (delta 2), reused 0 (delta 0)
   remote: Compressing source files... done.
   remote: Building source:
   remote:
   remote: -----> Python app detected
   remote:  !     The latest version of Python 3.6 is python-3.6.6 (you 
   are using python-3.6.4, which is unsupported).
   remote:  !     We recommend upgrading by specifying the latest version 
   (python-3.6.6).
   remote:        Learn More: 
   https://devcenter.heroku.com/articles/python-runtimes
   remote: -----> Installing requirements with pip
   remote:
   remote: -----> wkhtmltopdf app detected
   remote: -----> Moving wkhtmltopdf binaries to /app/bin
   remote: -----> Discovering process types
   remote:        Procfile declares types -> web
   remote:
   remote: -----> Compressing...
   remote:        Done: 103.8M
   remote: -----> Launching...
   remote:        Released v19
   remote:        https://XXXXXXX.herokuapp.com/ deployed to 
   Heroku
   remote:
   remote: Verifying deploy... done.

我的应用已正确部署，在Heroku中运行代码时出现错误

      Exception :No wkhtmltopdf executable found: "b''"
      If this file exists please check that this process can read it. 
      Otherwise please install wkhtmltopdf - 
      https://github.com/JazzCore/python-pdfkit/wiki/Installing-wkhtmltopdf

这与我没有将wkhtmltopdf路径添加到系统时收到的错误相同，正如我们在构建Moving wkhtmltopdf binaries to /app/bin中看到的那样，如何使Heroku配置为该wkhtmltopdf二进制路径？我们如何在Heroku中使用config vars来完成这项工作

我已经尝试过此generating-pdfs-wkhtmltopdf-heroku，但无法获取。无论我在哪里搜索到需要配置gem文件的红宝石解决方案，如何在python中完成

过去两天我一直在努力，请帮帮忙

预先感谢

Meghana Goud

Answer 1

我现在正在使用OSX和heroku来部署我的flask应用程序。部署后，heroku wkhtmltopdf二进制文件位于./bin/wkhtmltopdf中。所以我写了这段代码来解决这个问题。

if (platform.system() == 'Darwin'):
    config = pdfkit.configuration()
else:
    config = pdfkit.configuration(wkhtmltopdf='./bin/wkhtmltopdf')

使用（Flask）pdfkit和wkhtmltopdf

1 个答案: