WebSocket 握手期间的 Rails 6 生产 ActionCable 错误

问题描述

WebSocket connection to 'ws://my-ec2/cable' Failed: 
Error during WebSocket handshake: Unexpected response code: 404

伙计们，我在这里经常看到这个（旧）问题，所以它看起来像是重复的。但就我而言，我非常努力地修复这个错误，但我做不到。 我也遵循此更正：https://stackoverflow.com/a/55715218/8478892 但没有成功。

我的 Nginx.conf：

upstream puma {
    server unix:///home/ubuntu/apps/my_app/shared/tmp/sockets/my_app-puma.sock;
}

server {
    listen 80 default_server deferred;

    # If you're planning on using SSL (which you should),you can also go ahead and fill out the following server_name variable:
    # server_name example.com;

    # Don't forget to update these,too
    root /home/ubuntu/apps/my_app/current/public;
    access_log /var/log/Nginx/Nginx.access.log;
    error_log /var/log/Nginx/Nginx.error.log info;

    location ^~ /assets/ {
        gzip_static on;
        expires max;
        add_header Cache-Control public;
    }

    try_files $uri/index.html $uri @puma;
    location @puma {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header Host $http_host;
        proxy_redirect off;

        proxy_pass http://puma;
    }

    location /cable {
        proxy_pass http://puma;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
        proxy_set_header Host $host;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass_request_headers on;

        proxy_buffering off;
        proxy_redirect off;
        break;
    }

    error_page 500 502 503 504 /500.html;
    client_max_body_size 10M;
    keepalive_timeout 10;
}

在我的 cable.yml 中：

production:
  url: redis://http://my-ec2.com:6379

local: &local
  url: redis://localhost:6379

development: *local
test: *local

还有我的环境/production.rb：

Rails.application.configure do

  config.cache_classes = true

  config.eager_load = true

  config.consider_all_requests_local       = false


  config.public_file_server.enabled = ENV['RAILS_SERVE_STATIC_FILES'].present?



  config.active_storage.service = :local

  config.action_cable.mount_path = '/cable'
  config.action_cable.url = 'ws://my-ec2/cable'
  config.action_cable.allow_same_origin_as_host = true
  config.action_cable.allowed_request_origins = ["*"]


  config.log_level = :debug

  config.log_tags = [ :request_id ]



  config.action_mailer.perform_caching = false


  config.i18n.fallbacks = true

  config.active_support.deprecation = :notify

  config.log_formatter = ::Logger::Formatter.new


  if ENV["RAILS_LOG_TO_STDOUT"].present?
    logger           = ActiveSupport::Logger.new(STDOUT)
    logger.formatter = config.log_formatter
    config.logger    = ActiveSupport::TaggedLogging.new(logger)
  end

  config.active_record.dump_schema_after_migration = false

end

为遇到此问题的人而思考的一天：

在本地主机上设置 ActionCable 已经很不错了，但在生产环境中设置则是一场完整的战争。

解决方法

你的机器上安装了redis还是docker容器？我认为您正在将它与 sidekiq 一起使用，您是否在 /config/initializers 下有任何 sidekiq/redis 初始值设定项文件？

在 cable.yml 中应该是

production:
  url: redis://redis:6379/0

,

几天后，我设法自己解决了这个问题。 我的错误的主要原因是在我的环境/production.rb 文件中，我说 actioncable 端点是我的 ec2 的公共 ip。但实际上你应该把本地主机。我使用了与 development.rb 中相同的配置：

production.rb 之前：

...
   config.action_cable.mount_path = '/cable'
   config.action_cable.url = 'ws://my_ec2/cable'
   config.action_cable.allow_same_origin_as_host = true
   config.action_cable.allowed_request_origins = ["*"]
...

production.rb 之后：

...
  config.action_cable.disable_request_forgery_protection = true
   config.action_cable.url = "ws://localhost:3000/cable"
   config.action_cable.allowed_request_origins = [/http:\/\/*/,/https:\/\/*/]
   config.action_cable.allowed_request_origins = /(\.dev$)|^localhost$/
...