Capybara、Selenium、headless Chrome、Ubuntu Net :: ReadTimeout

Question

私は非常に似た質問を見ました。 OS Xではすべてうまく動作しますが、ubuntu 14.04ではエラーが発生します。その投稿を遡って、私は同じエラーが発生しています。元のポスターは代わりにポルターガイスト/ PhantomJSを使用していました。私はPhantomJSがもはや維持されていないので、Chromeでこの作業をしたいと思います。ここで

Net::ReadTimeout: Net::ReadTimeout and Selenium::WebDriver::Error::UnknownError: unknown error: Chrome failed to start on Rails 5.1.beta System Test

私のUbuntu上の手順インストールされています

apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 40976EAF437D05B5 
wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | apt-key add - 
cat <<EOF > /etc/apt/sources.list.d/google-chrome.list 
deb http://dl.google.com/linux/chrome/deb/ stable main 
EOF 
apt-get update 
apt-get install --force-yes -y google-chrome-stable 
cd /root/ && curl -O "http://chromedriver.storage.googleapis.com/2.32/chromedriver_linux64.zip" 
cd /root/ && unzip chromedriver_linux64.zip && cp chromedriver /usr/bin 

は、一度に1つのステップを取ると、私はchromedriver正しくインストールされ、正常に動作し、グーグル・クロームを確認しました。セレンのドライバーもうまく動作します。

link = ENV['LINK'] || "https://www.amazon.com" 
#https://stackoverflow.com/questions/44424200/how-do-i-use-selenium-webdriver-on-headless-chrome 
Selenium::WebDriver::Chrome.driver_path="/usr/bin/chromedriver" if RUBY_PLATFORM.include? "linux" 
options = %w[--headless --disable-gpu] 
options += %w[--binary='/usr/bin/google-chrome'] if RUBY_PLATFORM.include? "linux" 
driver = Selenium::WebDriver.for :chrome, switches: options 
driver.navigate.to "#{link}" 
driver.save_screenshot("./screen.png") 
driver.quit 

URLを訪問中にカピバラのテストがタイムアウトしました。

require 'capybara' 
include Capybara::DSL 

link = ENV['LINK'] || "https://www.amazon.com" 
options = %w[--headless --disable-gpu] 
options += %w[--binary='/usr/bin/google-chrome'] if RUBY_PLATFORM.include? "linux" 
Selenium::WebDriver::Chrome.driver_path="/usr/bin/chromedriver" if RUBY_PLATFORM.include? "linux" 
Capybara.register_driver(:headless_chrome) do |app| 
    capabilities = Selenium::WebDriver::Remote::Capabilities.chrome(chromeOptions: { args: options }) 
    Capybara::Selenium::Driver.new(app, browser: :chrome, desired_capabilities: capabilities) 
end 
Capybara.javascript_driver = :headless_chrome 
session = Capybara::Session.new(:headless_chrome) 
session.visit "#{link}" 

エラーは以下のMSGです：

session.visit "#{link}"

Net::ReadTimeout: Net::ReadTimeout 
    from /usr/lib/ruby/2.3.0/net/protocol.rb:158:in `rbuf_fill' 
    from /usr/lib/ruby/2.3.0/net/protocol.rb:136:in `readuntil' 
    from /usr/lib/ruby/2.3.0/net/protocol.rb:146:in `readline' 
    from /usr/lib/ruby/2.3.0/net/http/response.rb:40:in `read_status_line' 
    from /usr/lib/ruby/2.3.0/net/http/response.rb:29:in `read_new' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1437:in `block in transport_request' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1434:in `catch' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1434:in `transport_request' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1407:in `request' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1400:in `block in request' 
    from /usr/lib/ruby/2.3.0/net/http.rb:853:in `start' 
    from /usr/lib/ruby/2.3.0/net/http.rb:1398:in `request' 
    from /var/www/railsapp/vendor/bundle/ruby/2.3.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:107:in `response_for' 
    from /var/www/railsapp/vendor/bundle/ruby/2.3.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/default.rb:58:in `request' 
    from /var/www/railsapp/vendor/bundle/ruby/2.3.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/http/common.rb:59:in `call' 
    from /var/www/railsapp/vendor/bundle/ruby/2.3.0/gems/selenium-webdriver-2.53.4/lib/selenium/webdriver/remote/bridge.rb:649:in `raw_execute' 
... 10 levels... 
    from /usr/bin/irb:11:in `<top (required)>' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli/exec.rb:74:in `load' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli/exec.rb:74:in `kernel_load' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli/exec.rb:27:in `run' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli.rb:332:in `exec' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/vendor/thor/lib/thor/command.rb:27:in `run' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in `invoke_command' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/vendor/thor/lib/thor.rb:359:in `dispatch' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli.rb:20:in `dispatch' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/vendor/thor/lib/thor/base.rb:440:in `start' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/cli.rb:11:in `start' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/exe/bundle:34:in `block in <top (required)>' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/lib/bundler/friendly_errors.rb:100:in `with_friendly_errors' 
    from /usr/lib/ruby/gems/2.3.0/gems/bundler-1.13.6/exe/bundle:26:in `<top (required)>' 
    from /usr/bin/bundle:23:in `load' 
    from /usr/bin/bundle:23:in `<main>' 

Answer 1

ヘッドレスChromeとそれをサポートchromedriverは比較的新しいものです。 Selenium-webdriverを最新版（この回答時点では3.5.2）にアップデートしてサポートしてください。あなたは、最新のカピバラを使用している場合、あなたもちょうどカピバラを使用して試すことができ、ことをやったら、むしろ独自のドライバを登録する必要がより

if RUBY_PLATFORM.include? "linux" 
    Selenium::WebDriver::Chrome.driver_path = "/usr/bin/chromedriver" 
    Selenium::WebDriver::Chrome.path = "/usr/bin/google-chrome" 
end 
Capybara.javascript_driver = :selenium_chrome_headless 

と、登録済みのドライバを提供しました。