imgkit gem不能在rails应用程序中使用heroku

Question

嗨，我有一个小应用程序，使用imgkit从一些文本生成一个png。我的报价模型中的每个引用都使用imgkit来创建png版本

应用程序/控制器/ quotes_controller.rb

def show
    respond_to do |format|
      format .html
      format.png do
        kit = IMGKit.new render_to_string, width: 1080, height: 1080
        send_data kit.to_png, type: "image/png", disposition: "inline"
      end
    end
  end 

它在我的本地机器上运行良好，但是当我上传到heroku imgkit停止工作。

我尝试将二进制文件添加到gem文件中，如下所示：

source 'https://rubygems.org'
git_source(:github) { |repo| "https://github.com/#{repo}.git" }

ruby '2.6.0'

# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
gem 'rails', '~> 5.2.3'
# Use postgresql as the database for Active Record
gem 'pg', '>= 0.18', '< 2.0'
# Use Puma as the app server
gem 'puma', '~> 3.11'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 5.0'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# See https://github.com/rails/execjs#readme for more supported runtimes
# gem 'mini_racer', platforms: :ruby
gem 'bootstrap'
gem 'jquery-rails'
gem 'imgkit'
gem 'wkhtmltoimage-binary'
gem 'devise'
gem "font-awesome-rails"
# Use CoffeeScript for .coffee assets and views
gem 'coffee-rails', '~> 4.2'
# Turbolinks makes navigating your web application faster. Read more: https://github.com/turbolinks/turbolinks
gem 'turbolinks', '~> 5'
# Build JSON APIs with ease. Read more: https://github.com/rails/jbuilder
gem 'jbuilder', '~> 2.5'
# Use Redis adapter to run Action Cable in production
# gem 'redis', '~> 4.0'
# Use ActiveModel has_secure_password
# gem 'bcrypt', '~> 3.1.7'

# Use ActiveStorage variant
# gem 'mini_magick', '~> 4.8'

# Use Capistrano for deployment
# gem 'capistrano-rails', group: :development

# Reduces boot times through caching; required in config/boot.rb
gem 'bootsnap', '>= 1.1.0', require: false

group :development, :test do
  # Call 'byebug' anywhere in the code to stop execution and get a debugger console
  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
  gem "better_errors"
  gem "binding_of_caller"
end

group :development do
  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
  gem 'web-console', '>= 3.3.0'
  gem 'listen', '>= 3.0.5', '< 3.2'
  # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
  gem 'spring'
  gem 'spring-watcher-listen', '~> 2.0.0'
end

group :test do
  # Adds support for Capybara system testing and selenium driver
  gem 'capybara', '>= 2.15'
  gem 'selenium-webdriver'
  # Easy installation and use of chromedriver to run system tests with Chrome
  gem 'chromedriver-helper'
end

# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

不幸的是，这不起作用。

然后我按照https://github.com/csquared/IMGKit#heroku的说明进行操作

并下载了https://github.com/wkhtmltopdf/obsolete-downloads/blob/master/README.md#linux提到的10.0版本

我将文件添加到bin / wkhtmltoimage-amd64并添加了文件config / initializers / imgkit.rb

使用以下代码到该文件

IMGKit.configure do |config|
  config.wkhtmltoimage = Rails.root.join('bin', 'wkhtmltoimage-amd64').to_s if ENV['RACK_ENV'] == 'production'
end

我测试过，发现它没有用，我一直在努力

IMGKit::NoExecutableError (No wkhtmltoimage executable found at /app/bin/wkhtmltoimage-amd64

任何人都可以指出我正确的方向，如果您需要更多信息，请告诉我

Answer 1

你已经在app/bin/wkhtmltoimage-amd64添加了二进制文件，但你指的是Rails.root.join('bin', 'wkhtmltoimage-amd64')，它是bin/wkhtmltoimage-amd64。

或

• 将二进制文件移动到bin/wkhtmltoimage-amd64，或
• 将Rails.root.join('bin', 'wkhtmltoimage-amd64')改为Rails.root.join('app', 'bin', 'wkhtmltoimage-amd64')。

我建议使用第一个选项，因为更常见的是在bin/的根目录中使用二进制文件。