使用 Heroku 和 Rails 4 应用程序重定向循环

Question

我的应用程序在本地运行良好，但是当我推送到 Heroku 时，在 Firefox 中显示“页面未正确重定向”（即 302 错误）。

运行heroku logs 会产生一堆这样的请求：

2015-06-02T21:30:26.556750+00:00 heroku[router]: at=info method=GET path="/" host=www.mydomainname.com request_id=a0cb3aa2-af7c-431a-9cc4-a237e551ae0a fwd="173.27.229.45" dyno=web.1 connect=2ms service=13ms status=302 bytes=499
2015-06-02T21:30:27.761039+00:00 heroku[router]: at=info method=GET path="/" host=www.mydomainname.com request_id=32026d7d-2167-4058-8ef6-8ebd15af7460 fwd="173.27.229.45" dyno=web.1 connect=2ms service=12ms status=302 bytes=499
2015-06-02T21:30:27.914344+00:00 heroku[router]: at=info method=GET path="/" host=www.mydomainname.com request_id=2087a90c-fd56-4d14-b630-9c92fda30c80 fwd="173.27.229.45" dyno=web.1 connect=1ms service=15ms status=302 bytes=499

当我在 Firefox 的开发者部分下运行“网络”选项时，它不断显示它在有和没有 www 的域之间交替。例如：

www.domain.com
domain.com
www.domain.com
domain.com

等等

我使用的是自定义域名，但它的设置与我正在运行的其他应用程序的设置方式完全相同，所以我不认为这是一个 DNS 问题，就设置进行。此外，当我访问“myappname.herokuapp.com” URL 时，由于某种原因，它会立即重定向到 heroku.com。不知道为什么。我运行了“生产检查”，它通过了“DNS 配置”部分。

我意识到我没有在这里提供大量信息（不知道还能提供什么），但是对于接下来我可以研究什么有什么想法吗？

编辑：今天它是在之前发布的重定向代码之前说的：

2015-06-03T14:38:14.651296+00:00 heroku[web.2]: State changed from up to down
2015-06-03T14:38:17.135688+00:00 heroku[web.2]: Stopping all processes with SIGTERM
2015-06-03T14:38:17.774095+00:00 app[web.2]: [2015-06-03 14:38:17] FATAL SignalException: SIGTERM
2015-06-03T14:38:17.774101+00:00 app[web.2]:    /app/vendor/ruby-2.1.5/lib/ruby/2.1.0/webrick/server.rb:170:in `select'
2015-06-03T14:38:17.774103+00:00 app[web.2]:    /app/vendor/ruby-2.1.5/lib/ruby/2.1.0/webrick/server.rb:170:in `block in start'
2015-06-03T14:38:17.774104+00:00 app[web.2]:    /app/vendor/ruby-2.1.5/lib/ruby/2.1.0/webrick/server.rb:32:in `start'
2015-06-03T14:38:17.774105+00:00 app[web.2]:    /app/vendor/ruby-2.1.5/lib/ruby/2.1.0/webrick/server.rb:160:in `start'
2015-06-03T14:38:17.774106+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/rack-1.6.0/lib/rack/handler/webrick.rb:35:in `run'
2015-06-03T14:38:17.774108+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/rack-1.6.0/lib/rack/server.rb:286:in `start'
2015-06-03T14:38:17.774109+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands/server.rb:80:in `start'
2015-06-03T14:38:17.774110+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:80:in `block in server'
2015-06-03T14:38:17.774111+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `tap'
2015-06-03T14:38:17.774113+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:75:in `server'
2015-06-03T14:38:17.774114+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
2015-06-03T14:38:17.774115+00:00 app[web.2]:    /app/vendor/bundle/ruby/2.1.0/gems/railties-4.2.0/lib/rails/commands.rb:17:in `<top (required)>'
2015-06-03T14:38:17.774117+00:00 app[web.2]:    bin/rails:4:in `require'
2015-06-03T14:38:17.774118+00:00 app[web.2]:    bin/rails:4:in `<main>'
2015-06-03T14:38:17.774147+00:00 app[web.2]: [2015-06-03 14:38:17] INFO  WEBrick::HTTPServer#start done.
2015-06-03T14:38:17.774124+00:00 app[web.2]: [2015-06-03 14:38:17] INFO  going to shutdown ...
2015-06-03T14:38:17.828035+00:00 app[web.2]: => Booting WEBrick
2015-06-03T14:38:17.828041+00:00 app[web.2]: => Rails 4.2.0 application starting in production on http://0.0.0.0:4223
2015-06-03T14:38:17.828043+00:00 app[web.2]: => Run `rails server -h` for more startup options
2015-06-03T14:38:17.828045+00:00 app[web.2]: => Ctrl-C to shutdown server
2015-06-03T14:38:17.828046+00:00 app[web.2]: Exiting
2015-06-03T14:38:18.624457+00:00 heroku[web.2]: Process exited with status 143

编辑 2： 我将存储库重新克隆到另一个目录，然后运行 ​​heroku create、git push heroku master，然后运行 ​​heroku run rake db:migrate。我这样做是为了消除任何可能的 DNS 问题。日志现在说：

2015-06-03T15:55:51.082260+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=lit-inlet-1933.herokuapp.com request_id=2cd494b9-8f93-4270-b8db-e1dda9a6ab4a fwd="173.27.229.45" dyno= connect= service= status=503 bytes=
2015-06-03T15:55:51.274766+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=lit-inlet-1933.herokuapp.com request_id=78128ada-cb90-4580-8102-be756ec7b7cc fwd="173.27.229.45" dyno= connect= service= status=503 bytes=
2015-06-03T15:55:53.861456+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=lit-inlet-1933.herokuapp.com request_id=6d89785d-1b00-4b40-8984-15dbbe5e994f fwd="173.27.229.45" dyno= connect= service= status=503 bytes=

这表明根 URL“/”发生 2 次崩溃，/favicon.ico 发生 2 次崩溃。基于 favicon.ico，我从根页面中删除了所有 favicon 作为测试。现在应用程序的行为与之前的应用程序类似：它立即重定向到 heroku.com 而不是加载页面，并且日志显示：

2015-06-03T16:00:42.804253+00:00 heroku[web.1]: State changed from crashed to starting
2015-06-03T16:00:48.568268+00:00 heroku[web.1]: Starting process with command `bin/rails server -p 25258 -e production`
2015-06-03T16:00:57.769255+00:00 app[web.1]: [2015-06-03 16:00:57] INFO  WEBrick 1.3.1
2015-06-03T16:00:57.769284+00:00 app[web.1]: [2015-06-03 16:00:57] INFO  ruby 2.1.5 (2014-11-13) [x86_64-linux]
2015-06-03T16:00:57.769643+00:00 app[web.1]: [2015-06-03 16:00:57] INFO  WEBrick::HTTPServer#start: pid=3 port=25258
2015-06-03T16:00:58.321124+00:00 heroku[web.1]: State changed from starting to up
2015-06-03T16:01:00.754258+00:00 heroku[router]: at=info method=GET path="/" host=lit-inlet-1933.herokuapp.com request_id=8664d409-5542-4bee-914d-00639c08c2d0 fwd="173.27.229.45" dyno=web.1 connect=1ms service=174ms status=302 bytes=501

根 URL 非常简单。有一个welcome_controller：

class WelcomeController < ApplicationController
  skip_before_filter :authenticate_user!, only: :index

  def index    
  end
end

视图是：

  <div class="jumbotron">
    <h1> Task Clash</h1>
    <p>A ridiculously simple and easy-to-use CRM/Time Tracking tool aimed at small businesses!</p>
    <p><%= link_to "Create Account", new_account_path, class: "btn btn-primary btn-lg" %></p>
  </div>

任何帮助将不胜感激！

编辑 3：我将 rails_12factor 添加到了我的 Gemfile 中，现在得到了这个：

2015-06-03T19:37:48.713189+00:00 heroku[router]: at=info method=GET path="/" host=www.taskclash.com request_id=c0dfd7ac-233c-4be9-a155-57b66f9a84cb fwd="173.27.229.45" dyno=web.1 connect=0ms service=12ms status=302 bytes=435
2015-06-03T19:37:48.700898+00:00 app[web.1]: Started GET "/" for 173.27.229.45 at 2015-06-03 19:37:48 +0000
2015-06-03T19:37:48.710826+00:00 app[web.1]:   Account Load (1.4ms)  SELECT  "public"."accounts".* FROM "public"."accounts" WHERE "public"."accounts"."subdomain" = $1 LIMIT 1  [["subdomain", "www"]]
2015-06-03T19:37:48.711577+00:00 app[web.1]: Filter chain halted as :load_schema rendered or redirected
2015-06-03T19:37:48.711704+00:00 app[web.1]: Completed 302 Found in 8ms (ActiveRecord: 6.5ms)
2015-06-03T19:37:48.703333+00:00 app[web.1]: Processing by TasksController#index as HTML
2015-06-03T19:37:48.711291+00:00 app[web.1]: Redirected to https://taskclash.com/

Answer 1

检查是否有待处理的生产迁移。从终端运行此命令： $ heroku run rake db:migrate

如果没有待处理的迁移，请发布更多行日志。