使用PDFkit gem生成pdf挂在rails 4上 [英] generating pdf hangs on rails 4 using PDFkit gem
问题描述
我可以通过以下方式下载pdf文件:
I'm able to download pdf file with:
curl google.com | wkhtmltopdf - test.pdf
这意味着wkhtmlpdf安装成功.
so it means, wkhtmlpdf installation was successful.
但是，当我尝试通过访问http://localhost:3000/contacts/1.pdf生成pdf文件时，它挂起了.在状态栏中，它显示:Waiting for localhost...
But, when I try to generate pdf file by accessing http://localhost:3000/contacts/1.pdf it hangs. In the status bar it shows: Waiting for localhost...
启用服务器输出:
Started GET "/contacts/1.pdf" for 127.0.0.1 at 2013-07-28 21:45:06 +0900
ActiveRecord::SchemaMigration Load (0.1ms) SELECT "schema_migrations".* FROM "schema_migrations"
Processing by ContactsController#show as HTML
Parameters: {"id"=>"1"}
Contact Load (0.3ms) SELECT "contacts".* FROM "contacts" WHERE "contacts"."id" = ? LIMIT 1 [["id", "1"]]
Rendered contacts/show.html.erb within layouts/application (1.4ms)
Completed 200 OK in 99ms (Views: 57.0ms | ActiveRecord: 0.7ms)
宝石文件:
gem 'pdfkit'
application.rb:
application.rb:
config.middleware.use "PDFKit::Middleware"
根据 PDFKit railscast ，只需添加.pdf ...
According to the PDFKit railscast this should be enough for generating pdf files just by adding .pdf ...
更新:
show.html.erb:
show.html.erb:
<p id="notice"><%= notice %></p>
<p>
<strong>Name:</strong>
<%= @contact.name %>
</p>
<p>
<strong>Age:</strong>
<%= @contact.age %>
</p>
<%= link_to 'Edit', edit_contact_path(@contact) %> |
<%= link_to 'Back', contacts_path %>
layouts/application.html.erb:
layouts/application.html.erb:
<!DOCTYPE html>
<html>
<head>
<title>Pdftest</title>
<%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => true %>
<%= javascript_include_tag "application", "data-turbolinks-track" => true %>
<%= csrf_meta_tags %>
</head>
<body>
<%= yield %>
</body>
</html>
更新2:
感谢@Arman H帮助我弄清楚我必须为资产指定绝对路径，而不是相对路径.当我删除以下几行后，我便能够生成PDF文件:
Thanks to @Arman H for helping me to figure out that I have to specify absolute path for assets instead of a relative ones. When I removed the following lines I was able to generate PDF file:
<%= stylesheet_link_tag "application", media: "all", "data-turbolinks-track" => true %>
<%= javascript_include_tag "application", "data-turbolinks-track" => true %>
现在，我不知道如何用绝对路径替代它.看来这是我需要的帖子，但我仍然无法弄清我的情况.
Now, I can't get how to substitute this with an absolute paths. It seems this post is what I need, but I still can't figure out how this would look like for my case.
推荐答案
此问题是由于stylesheet_link_tag和javascript_include_tag使用相对URL引起的，当从与wkhtmltopdf正在运行.
The issue was due to stylesheet_link_tag and javascript_include_tag using relative URLs, which often causes wkhtmltopdf to hang when loading assets from the same server that wkhtmltopdf is running on.
使用绝对URL 来解决资产问题.
在Rails的配置中设置asset_host，这也会影响stylesheet_link_tag和javascript_include_tag:
Set asset_host in Rails' config, which also affects stylesheet_link_tag and javascript_include_tag:
# Modify asset host config setting in `config/application.rb`
# Or create a new initializer: `config/initializers/wkhtmltopdf.rb`
config.action_controller.asset_host = "http://mysite.com"
# Or you can have different hosts for development (local) and production (CDN):
# In `config/environments/development.rb`
config.action_controller.asset_host = "http://localhost"
# In `config/environments/production.rb`
config.action_controller.asset_host = "http://d111111abcdef8.cloudfront.net"
这篇关于使用PDFkit gem生成pdf挂在rails 4上的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
