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我已经安装了 PDFKit 和 wkhtmltopdf。我为 wkhtmltopdf 使用了 brew install，对于 PDFkit，我将它添加到我的 gem 文件中并创建了以下内容：

# config/initializers/pdfkit.rb
PDFKit.configure do |config|
  config.wkhtmltopdf = '/usr/local/bin/wkhtmltopdf'
  config.default_options = {
    # :page_size => 'Legal',
    # :print_media_type => true
  }
  # config.root_url = "http://localhost" # Use only if your external hostname is unavailable on the server.
end

以及将以下内容添加到 application.rb

require 'pdfkit'
config.middleware.use PDFKit::Middleware

当我跑步时，which wkhtmltopdf我得到：/usr/local/bin/wkhtmltopdf

我也可以运行wkhtmltopdf google.com google.pdf，它会正确拉下文件。

我什至可以做类似的事情wkhtmltopdf http://localhost:3000/about google.pdf，而且效果很好。

但是，如果我尝试这样做：http://localhost:3000/about.pdf并且只是在我的浏览器中去那里，整个网站只会尝试加载并且永远不会完成。但是，我得到以下信息：

RuntimeError (command failed: "/usr/local/bin/wkhtmltopdf" "--quiet" "-" "-"):
  pdfkit (0.5.2) lib/pdfkit/pdfkit.rb:71:in `to_pdf'
  pdfkit (0.5.2) lib/pdfkit/middleware.rb:21:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call'
  rack (1.4.1) lib/rack/etag.rb:23:in `call'
  rack (1.4.1) lib/rack/conditionalget.rb:25:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/head.rb:14:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/params_parser.rb:21:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/flash.rb:242:in `call'
  rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context'
  rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/cookies.rb:338:in `call'
  activerecord (3.2.3) lib/active_record/query_cache.rb:64:in `call'
  activerecord (3.2.3) lib/active_record/connection_adapters/abstract/connection_pool.rb:467:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call'
  activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `_run__1600846312864942852__call__3683691454379641054__callbacks'
  activesupport (3.2.3) lib/active_support/callbacks.rb:405:in `__run_callback'
  activesupport (3.2.3) lib/active_support/callbacks.rb:385:in `_run_call_callbacks'
  activesupport (3.2.3) lib/active_support/callbacks.rb:81:in `run_callbacks'
  actionpack (3.2.3) lib/action_dispatch/middleware/callbacks.rb:27:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/reloader.rb:65:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/remote_ip.rb:31:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call'
  railties (3.2.3) lib/rails/rack/logger.rb:26:in `call_app'
  railties (3.2.3) lib/rails/rack/logger.rb:16:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/request_id.rb:22:in `call'
  rack (1.4.1) lib/rack/methodoverride.rb:21:in `call'
  rack (1.4.1) lib/rack/runtime.rb:17:in `call'
  activesupport (3.2.3) lib/active_support/cache/strategy/local_cache.rb:72:in `call'
  rack (1.4.1) lib/rack/lock.rb:15:in `call'
  actionpack (3.2.3) lib/action_dispatch/middleware/static.rb:62:in `call'
  railties (3.2.3) lib/rails/engine.rb:479:in `call'
  railties (3.2.3) lib/rails/application.rb:220:in `call'
  rack (1.4.1) lib/rack/content_length.rb:14:in `call'
  railties (3.2.3) lib/rails/rack/log_tailer.rb:14:in `call'
  rack (1.4.1) lib/rack/handler/webrick.rb:59:in `service'
  /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:138:in `service'
  /usr/local/lib/ruby/1.9.1/webrick/httpserver.rb:94:in `run'
  /usr/local/lib/ruby/1.9.1/webrick/server.rb:191:in `block in start_thread'

只是为了确认它在中间件中。

rake middleware
use ActionDispatch::Static
use Rack::Lock
use #<ActiveSupport::Cache::Strategy::LocalCache::Middleware:0x007fc11b9c4a30>
use Rack::Runtime
use Rack::MethodOverride
use ActionDispatch::RequestId
use Rails::Rack::Logger
use ActionDispatch::ShowExceptions
use ActionDispatch::DebugExceptions
use ActionDispatch::RemoteIp
use ActionDispatch::Reloader
use ActionDispatch::Callbacks
use ActiveRecord::ConnectionAdapters::ConnectionManagement
use ActiveRecord::QueryCache
use ActionDispatch::Cookies
use ActionDispatch::Session::CookieStore
use ActionDispatch::Flash
use ActionDispatch::ParamsParser
use ActionDispatch::Head
use Rack::ConditionalGet
use Rack::ETag
use ActionDispatch::BestStandardsSupport
use PDFKit::Middleware
run Teacherjoy::Application.routes

为了让这个工作，我缺少什么？

4

2 回答 2

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如果您在系统中使用 rvm，则 pdfkit /usr/local/bin/wkhtmltopdf 的路径不正确。我的本地开发环境系统就是这种情况。

我检查了哪个 wkhtmltopdf 这个命令在我的应用程序目录中返回 2 个路径，如果我使用了我的 gemset，那么我得到一个这样的路径

  which wkhtmltopdf
/home/re10/.rvm/gems/ruby-1.8.7-p358@lmft/bin/wkhtmltopdf  (path to the gemset in server)

我在根目录中尝试了相同的命令，然后我得到了一个路径

which wkhtmltopdf
/usr/local/bin/wkhtmltopdf

因此，在进入您的项目目录并使用 gemset 之后，尝试安装软件包，该命令的路径 wkhtmltopdf 应该位于您的 rvm 内以及该 gemset 的所有 gem 存储位置内。

请参考这个 stackoverflow 的例子。这对我有用。 https://stackoverflow.com/a/5764290/1304966

于 2013-04-05T12:44:04.967 回答
0

我今天早上尝试了 PDFKit，遇到了同样的无限页面加载问题。我通过添加“config.threadsafe！”来修复它。到我的 application.rb

此外，我在此 stackoverflow 答案的解决方案的指导下更改了我的代码

于 2013-02-27T11:42:13.110 回答