Update links and code examples in the guides to use HTTPS where the host supports it.

30 files changed, 109 insertions, 109 deletions

diff --git a/guides/source/action_cable_overview.md b/guides/source/action_cable_overview.md
index 7a9ff96c44..c531b6eee2 100644
--- a/guides/source/action_cable_overview.md
+++ b/guides/source/action_cable_overview.md
@@ -653,7 +653,7 @@ passed to the server config as an array. The origins can be instances of
 strings or regular expressions, against which a check for the match will be performed.
 
 ```ruby
-config.action_cable.allowed_request_origins = ['http://rubyonrails.com', %r{http://ruby.*}]
+config.action_cable.allowed_request_origins = ['https://rubyonrails.com', %r{http://ruby.*}]
 ```
 
 To disable and allow requests from any origin:
diff --git a/guides/source/action_controller_overview.md b/guides/source/action_controller_overview.md
index d0d84251e4..f8367283fc 100644
--- a/guides/source/action_controller_overview.md
+++ b/guides/source/action_controller_overview.md
@@ -61,7 +61,7 @@ end
 
 The [Layouts & Rendering Guide](layouts_and_rendering.html) explains this in more detail.
 
-`ApplicationController` inherits from `ActionController::Base`, which defines a number of helpful methods. This guide will cover some of these, but if you're curious to see what's in there, you can see all of them in the [API documentation](http://api.rubyonrails.org/classes/ActionController.html) or in the source itself.
+`ApplicationController` inherits from `ActionController::Base`, which defines a number of helpful methods. This guide will cover some of these, but if you're curious to see what's in there, you can see all of them in the [API documentation](https://api.rubyonrails.org/classes/ActionController.html) or in the source itself.
 
 Only public methods are callable as actions. It is a best practice to lower the visibility of methods (with `private` or `protected`) which are not intended to be actions, like auxiliary methods or filters.
 
@@ -157,7 +157,7 @@ And, assuming that you're sending the data to `CompaniesController`, it would th
 { name: "acme", address: "123 Carrot Street", company: { name: "acme", address: "123 Carrot Street" } }
 ```
 
-You can customize the name of the key or specific parameters you want to wrap by consulting the [API documentation](http://api.rubyonrails.org/classes/ActionController/ParamsWrapper.html)
+You can customize the name of the key or specific parameters you want to wrap by consulting the [API documentation](https://api.rubyonrails.org/classes/ActionController/ParamsWrapper.html)
 
 NOTE: Support for parsing XML parameters has been extracted into a gem named `actionpack-xml_parser`.
 
@@ -469,7 +469,7 @@ To reset the entire session, use `reset_session`.
 
 The flash is a special part of the session which is cleared with each request. This means that values stored there will only be available in the next request, which is useful for passing error messages etc.
 
-It is accessed in much the same way as the session, as a hash (it's a [FlashHash](http://api.rubyonrails.org/classes/ActionDispatch/Flash/FlashHash.html) instance).
+It is accessed in much the same way as the session, as a hash (it's a [FlashHash](https://api.rubyonrails.org/classes/ActionDispatch/Flash/FlashHash.html) instance).
 
 Let's use the act of logging out as an example. The controller can send a message which will be displayed to the user on the next request:
 
@@ -591,7 +591,7 @@ Rails also provides a signed cookie jar and an encrypted cookie jar for storing
 sensitive data. The signed cookie jar appends a cryptographic signature on the
 cookie values to protect their integrity. The encrypted cookie jar encrypts the
 values in addition to signing them, so that they cannot be read by the end user.
-Refer to the [API documentation](http://api.rubyonrails.org/classes/ActionDispatch/Cookies.html)
+Refer to the [API documentation](https://api.rubyonrails.org/classes/ActionDispatch/Cookies.html)
 for more details.
 
 These special cookie jars use a serializer to serialize the assigned values into
@@ -814,7 +814,7 @@ In every controller there are two accessor methods pointing to the request and t
 
 ### The `request` Object
 
-The request object contains a lot of useful information about the request coming in from the client. To get a full list of the available methods, refer to the [Rails API documentation](http://api.rubyonrails.org/classes/ActionDispatch/Request.html) and [Rack Documentation](http://www.rubydoc.info/github/rack/rack/Rack/Request). Among the properties that you can access on this object are:
+The request object contains a lot of useful information about the request coming in from the client. To get a full list of the available methods, refer to the [Rails API documentation](https://api.rubyonrails.org/classes/ActionDispatch/Request.html) and [Rack Documentation](https://www.rubydoc.info/github/rack/rack/Rack/Request). Among the properties that you can access on this object are:
 
 | Property of `request`                     | Purpose                                                                          |
 | ----------------------------------------- | -------------------------------------------------------------------------------- |
@@ -836,7 +836,7 @@ Rails collects all of the parameters sent along with the request in the `params`
 
 ### The `response` Object
 
-The response object is not usually used directly, but is built up during the execution of the action and rendering of the data that is being sent back to the user, but sometimes - like in an after filter - it can be useful to access the response directly. Some of these accessor methods also have setters, allowing you to change their values. To get a full list of the available methods, refer to the [Rails API documentation](http://api.rubyonrails.org/classes/ActionDispatch/Response.html) and [Rack Documentation](http://www.rubydoc.info/github/rack/rack/Rack/Response).
+The response object is not usually used directly, but is built up during the execution of the action and rendering of the data that is being sent back to the user, but sometimes - like in an after filter - it can be useful to access the response directly. Some of these accessor methods also have setters, allowing you to change their values. To get a full list of the available methods, refer to the [Rails API documentation](https://api.rubyonrails.org/classes/ActionDispatch/Response.html) and [Rack Documentation](https://www.rubydoc.info/github/rack/rack/Rack/Response).
 
 | Property of `response` | Purpose                                                                                             |
 | ---------------------- | --------------------------------------------------------------------------------------------------- |
diff --git a/guides/source/action_mailer_basics.md b/guides/source/action_mailer_basics.md
index 16db433bd4..469fa171bc 100644
--- a/guides/source/action_mailer_basics.md
+++ b/guides/source/action_mailer_basics.md
@@ -746,7 +746,7 @@ files (environment.rb, production.rb, etc...)
 |`smtp_settings`|Allows detailed configuration for `:smtp` delivery method:<ul><li>`:address` - Allows you to use a remote mail server. Just change it from its default `"localhost"` setting.</li><li>`:port` - On the off chance that your mail server doesn't run on port 25, you can change it.</li><li>`:domain` - If you need to specify a HELO domain, you can do it here.</li><li>`:user_name` - If your mail server requires authentication, set the username in this setting.</li><li>`:password` - If your mail server requires authentication, set the password in this setting.</li><li>`:authentication` - If your mail server requires authentication, you need to specify the authentication type here. This is a symbol and one of `:plain` (will send the password in the clear), `:login` (will send password Base64 encoded) or `:cram_md5` (combines a Challenge/Response mechanism to exchange information and a cryptographic Message Digest 5 algorithm to hash important information)</li><li>`:enable_starttls_auto` - Detects if STARTTLS is enabled in your SMTP server and starts to use it. Defaults to `true`.</li><li>`:openssl_verify_mode` - When using TLS, you can set how OpenSSL checks the certificate. This is really useful if you need to validate a self-signed and/or a wildcard certificate. You can use the name of an OpenSSL verify constant ('none' or 'peer') or directly the constant (`OpenSSL::SSL::VERIFY_NONE` or `OpenSSL::SSL::VERIFY_PEER`).</li></ul>|
 |`sendmail_settings`|Allows you to override options for the `:sendmail` delivery method.<ul><li>`:location` - The location of the sendmail executable. Defaults to `/usr/sbin/sendmail`.</li><li>`:arguments` - The command line arguments to be passed to sendmail. Defaults to `-i`.</li></ul>|
 |`raise_delivery_errors`|Whether or not errors should be raised if the email fails to be delivered. This only works if the external email server is configured for immediate delivery.|
-|`delivery_method`|Defines a delivery method. Possible values are:<ul><li>`:smtp` (default), can be configured by using `config.action_mailer.smtp_settings`.</li><li>`:sendmail`, can be configured by using `config.action_mailer.sendmail_settings`.</li><li>`:file`: save emails to files; can be configured by using `config.action_mailer.file_settings`.</li><li>`:test`: save emails to `ActionMailer::Base.deliveries` array.</li></ul>See [API docs](http://api.rubyonrails.org/classes/ActionMailer/Base.html) for more info.|
+|`delivery_method`|Defines a delivery method. Possible values are:<ul><li>`:smtp` (default), can be configured by using `config.action_mailer.smtp_settings`.</li><li>`:sendmail`, can be configured by using `config.action_mailer.sendmail_settings`.</li><li>`:file`: save emails to files; can be configured by using `config.action_mailer.file_settings`.</li><li>`:test`: save emails to `ActionMailer::Base.deliveries` array.</li></ul>See [API docs](https://api.rubyonrails.org/classes/ActionMailer/Base.html) for more info.|
 |`perform_deliveries`|Determines whether deliveries are actually carried out when the `deliver` method is invoked on the Mail message. By default they are, but this can be turned off to help functional testing. If this value is `false`, `deliveries` array will not be populated even if `delivery_method` is `:test`.|
 |`deliveries`|Keeps an array of all the emails sent out through the Action Mailer with delivery_method :test. Most useful for unit and functional testing.|
 |`default_options`|Allows you to set default values for the `mail` method options (`:from`, `:reply_to`, etc.).|
diff --git a/guides/source/action_view_overview.md b/guides/source/action_view_overview.md
index 495ae9d267..a1b69edd22 100644
--- a/guides/source/action_view_overview.md
+++ b/guides/source/action_view_overview.md
@@ -91,7 +91,7 @@ Here are some basic examples:
 ```ruby
 xml.em("emphasized")
 xml.em { xml.b("emph & bold") }
-xml.a("A Link", "href" => "http://rubyonrails.org")
+xml.a("A Link", "href" => "https://rubyonrails.org")
 xml.target("name" => "compile", "option" => "fast")
 ```
 
@@ -100,7 +100,7 @@ which would produce:
 ```html
 <em>emphasized</em>
 <em><b>emph &amp; bold</b></em>
-<a href="http://rubyonrails.org">A link</a>
+<a href="https://rubyonrails.org">A link</a>
 <target option="fast" name="compile" />
 ```
 
@@ -402,9 +402,9 @@ This will add `app/views/direct` to the end of the lookup paths.
 Overview of helpers provided by Action View
 -------------------------------------------
 
-WIP: Not all the helpers are listed here. For a full list see the [API documentation](http://api.rubyonrails.org/classes/ActionView/Helpers.html)
+WIP: Not all the helpers are listed here. For a full list see the [API documentation](https://api.rubyonrails.org/classes/ActionView/Helpers.html)
 
-The following is only a brief overview summary of the helpers available in Action View. It's recommended that you review the [API Documentation](http://api.rubyonrails.org/classes/ActionView/Helpers.html), which covers all of the helpers in more detail, but this should serve as a good starting point.
+The following is only a brief overview summary of the helpers available in Action View. It's recommended that you review the [API Documentation](https://api.rubyonrails.org/classes/ActionView/Helpers.html), which covers all of the helpers in more detail, but this should serve as a good starting point.
 
 ### AssetTagHelper
 
@@ -1446,7 +1446,7 @@ Sanitizes a block of CSS code.
 Strips all link tags from text leaving just the link text.
 
 ```ruby
-strip_links('<a href="http://rubyonrails.org">Ruby on Rails</a>')
+strip_links('<a href="https://rubyonrails.org">Ruby on Rails</a>')
 # => Ruby on Rails
 ```
 
diff --git a/guides/source/active_job_basics.md b/guides/source/active_job_basics.md
index 0ebef46373..0925ad3d74 100644
--- a/guides/source/active_job_basics.md
+++ b/guides/source/active_job_basics.md
@@ -121,7 +121,7 @@ production apps will need to pick a persistent backend.
 
 Active Job has built-in adapters for multiple queuing backends (Sidekiq,
 Resque, Delayed Job, and others). To get an up-to-date list of the adapters
-see the API Documentation for [ActiveJob::QueueAdapters](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
+see the API Documentation for [ActiveJob::QueueAdapters](https://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
 ### Setting the Backend
 
@@ -455,7 +455,7 @@ class RemoteServiceJob < ApplicationJob
 end
 ```
 
-To get more details see the API Documentation for [ActiveJob::Exceptions](http://api.rubyonrails.org/classes/ActiveJob/Exceptions/ClassMethods.html).
+To get more details see the API Documentation for [ActiveJob::Exceptions](https://api.rubyonrails.org/classes/ActiveJob/Exceptions/ClassMethods.html).
 
 ### Deserialization
 
diff --git a/guides/source/active_record_basics.md b/guides/source/active_record_basics.md
index 5c1de97aa8..7f17b19a13 100644
--- a/guides/source/active_record_basics.md
+++ b/guides/source/active_record_basics.md
@@ -29,7 +29,7 @@ Object Relational Mapping system.
 
 ### The Active Record Pattern
 
-[Active Record was described by Martin Fowler](http://www.martinfowler.com/eaaCatalog/activeRecord.html)
+[Active Record was described by Martin Fowler](https://www.martinfowler.com/eaaCatalog/activeRecord.html)
 in his book _Patterns of Enterprise Application Architecture_. In
 Active Record, objects carry both persistent data and behavior which
 operates on that data. Active Record takes the opinion that ensuring
@@ -117,10 +117,10 @@ to Active Record instances:
 * `updated_at` - Automatically gets set to the current date and time whenever
   the record is created or updated.
 * `lock_version` - Adds [optimistic
-  locking](http://api.rubyonrails.org/classes/ActiveRecord/Locking.html) to
+  locking](https://api.rubyonrails.org/classes/ActiveRecord/Locking.html) to
   a model.
 * `type` - Specifies that the model uses [Single Table
-  Inheritance](http://api.rubyonrails.org/classes/ActiveRecord/Base.html#class-ActiveRecord::Base-label-Single+table+inheritance).
+  Inheritance](https://api.rubyonrails.org/classes/ActiveRecord/Base.html#class-ActiveRecord::Base-label-Single+table+inheritance).
 * `(association_name)_type` - Stores the type for
   [polymorphic associations](association_basics.html#polymorphic-associations).
 * `(table_name)_count` - Used to cache the number of belonging objects on
diff --git a/guides/source/active_record_migrations.md b/guides/source/active_record_migrations.md
index 2c1796c464..14fcf58ce7 100644
--- a/guides/source/active_record_migrations.md
+++ b/guides/source/active_record_migrations.md
@@ -252,7 +252,7 @@ end
 ```
 
 This migration will create a `user_id` column and appropriate index.
-For more `add_reference` options, visit the [API documentation](http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_reference).
+For more `add_reference` options, visit the [API documentation](https://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_reference).
 
 There is also a generator which will produce join tables if `JoinTable` is part of the name:
 
@@ -520,12 +520,12 @@ Product.connection.execute("UPDATE products SET price = 'free' WHERE 1=1")
 
 For more details and examples of individual methods, check the API documentation.
 In particular the documentation for
-[`ActiveRecord::ConnectionAdapters::SchemaStatements`](http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html)
+[`ActiveRecord::ConnectionAdapters::SchemaStatements`](https://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html)
 (which provides the methods available in the `change`, `up` and `down` methods),
-[`ActiveRecord::ConnectionAdapters::TableDefinition`](http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html)
+[`ActiveRecord::ConnectionAdapters::TableDefinition`](https://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/TableDefinition.html)
 (which provides the methods available on the object yielded by `create_table`)
 and
-[`ActiveRecord::ConnectionAdapters::Table`](http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/Table.html)
+[`ActiveRecord::ConnectionAdapters::Table`](https://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/Table.html)
 (which provides the methods available on the object yielded by `change_table`).
 
 ### Using the `change` Method
diff --git a/guides/source/active_record_postgresql.md b/guides/source/active_record_postgresql.md
index 536a7138e9..12115d01ef 100644
--- a/guides/source/active_record_postgresql.md
+++ b/guides/source/active_record_postgresql.md
@@ -150,7 +150,7 @@ Event.where("payload->>'kind' = ?", "user_renamed")
 * [type definition](https://www.postgresql.org/docs/current/static/rangetypes.html)
 * [functions and operators](https://www.postgresql.org/docs/current/static/functions-range.html)
 
-This type is mapped to Ruby [`Range`](http://www.ruby-doc.org/core-2.2.2/Range.html) objects.
+This type is mapped to Ruby [`Range`](https://ruby-doc.org/core-2.2.2/Range.html) objects.
 
 ```ruby
 # db/migrate/20130923065404_create_events.rb
@@ -367,7 +367,7 @@ user.save!
 * [type definition](https://www.postgresql.org/docs/current/static/datatype-net-types.html)
 
 The types `inet` and `cidr` are mapped to Ruby
-[`IPAddr`](http://www.ruby-doc.org/stdlib-2.2.2/libdoc/ipaddr/rdoc/IPAddr.html)
+[`IPAddr`](https://ruby-doc.org/stdlib-2.2.2/libdoc/ipaddr/rdoc/IPAddr.html)
 objects. The `macaddr` type is mapped to normal text.
 
 ```ruby
diff --git a/guides/source/active_record_querying.md b/guides/source/active_record_querying.md
index 270696d38d..30493038e7 100644
--- a/guides/source/active_record_querying.md
+++ b/guides/source/active_record_querying.md
@@ -1552,7 +1552,7 @@ book.available?   # => false
 ```
 
 Read the full documentation about enums
-[in the Rails API docs](http://api.rubyonrails.org/classes/ActiveRecord/Enum.html).
+[in the Rails API docs](https://api.rubyonrails.org/classes/ActiveRecord/Enum.html).
 
 Understanding The Method Chaining
 ---------------------------------
@@ -2063,9 +2063,9 @@ under MySQL and MariaDB.
 Interpretation of the output of EXPLAIN is beyond the scope of this guide. The
 following pointers may be helpful:
 
-* SQLite3: [EXPLAIN QUERY PLAN](http://www.sqlite.org/eqp.html)
+* SQLite3: [EXPLAIN QUERY PLAN](https://www.sqlite.org/eqp.html)
 
-* MySQL: [EXPLAIN Output Format](http://dev.mysql.com/doc/refman/5.7/en/explain-output.html)
+* MySQL: [EXPLAIN Output Format](https://dev.mysql.com/doc/refman/5.7/en/explain-output.html)
 
 * MariaDB: [EXPLAIN](https://mariadb.com/kb/en/mariadb/explain/)
 
diff --git a/guides/source/active_record_validations.md b/guides/source/active_record_validations.md
index 0c57802188..e68f34dd5d 100644
--- a/guides/source/active_record_validations.md
+++ b/guides/source/active_record_validations.md
@@ -639,7 +639,7 @@ class Holiday < ApplicationRecord
     message: "should happen once per year" }
 end
 ```
-Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](http://dev.mysql.com/doc/refman/5.7/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](https://www.postgresql.org/docs/current/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns.
+Should you wish to create a database constraint to prevent possible violations of a uniqueness validation using the `:scope` option, you must create a unique index on both columns in your database. See [the MySQL manual](https://dev.mysql.com/doc/refman/5.7/en/multiple-column-indexes.html) for more details about multiple column indexes or [the PostgreSQL manual](https://www.postgresql.org/docs/current/static/ddl-constraints.html) for examples of unique constraints that refer to a group of columns.
 
 There is also a `:case_sensitive` option that you can use to define whether the
 uniqueness constraint will be case sensitive or not. This option defaults to
@@ -1044,7 +1044,7 @@ own custom validators.
 You can also create methods that verify the state of your models and add
 messages to the `errors` collection when they are invalid. You must then
 register these methods by using the `validate`
-([API](http://api.rubyonrails.org/classes/ActiveModel/Validations/ClassMethods.html#method-i-validate))
+([API](https://api.rubyonrails.org/classes/ActiveModel/Validations/ClassMethods.html#method-i-validate))
 class method, passing in the symbols for the validation methods' names.
 
 You can pass more than one symbol for each class method and the respective
diff --git a/guides/source/active_storage_overview.md b/guides/source/active_storage_overview.md
index e3bb41ae32..615f576797 100644
--- a/guides/source/active_storage_overview.md
+++ b/guides/source/active_storage_overview.md
@@ -421,7 +421,7 @@ Transforming Images
 To create a variation of the image, call `variant` on the `Blob`. You can pass
 any transformation to the method supported by the processor. The default
 processor is [MiniMagick](https://github.com/minimagick/minimagick), but you
-can also use [Vips](http://www.rubydoc.info/gems/ruby-vips/Vips/Image).
+can also use [Vips](https://www.rubydoc.info/gems/ruby-vips/Vips/Image).
 
 To enable variants, add the `image_processing` gem to your `Gemfile`:
 
diff --git a/guides/source/api_app.md b/guides/source/api_app.md
index 870f5f7b87..b8b6cb7874 100644
--- a/guides/source/api_app.md
+++ b/guides/source/api_app.md
@@ -76,7 +76,7 @@ Handled at the middleware layer:
 - Conditional GETs: Rails handles conditional `GET` (`ETag` and `Last-Modified`)
   processing request headers and returning the correct response headers and status
   code. All you need to do is use the
-  [`stale?`](http://api.rubyonrails.org/classes/ActionController/ConditionalGet.html#method-i-stale-3F)
+  [`stale?`](https://api.rubyonrails.org/classes/ActionController/ConditionalGet.html#method-i-stale-3F)
   check in your controller, and Rails will handle all of the HTTP details for you.
 - HEAD requests: Rails will transparently convert `HEAD` requests into `GET` ones,
   and return just the headers on the way out. This makes `HEAD` work reliably in
@@ -287,7 +287,7 @@ environment's configuration file.
 
 You can learn more about how to use `Rack::Sendfile` with popular
 front-ends in [the Rack::Sendfile
-documentation](http://rubydoc.info/github/rack/rack/master/Rack/Sendfile).
+documentation](https://www.rubydoc.info/github/rack/rack/master/Rack/Sendfile).
 
 Here are some values for this header for some popular servers, once these servers are configured to support
 accelerated file sending:
diff --git a/guides/source/api_documentation_guidelines.md b/guides/source/api_documentation_guidelines.md
index b6ee7354f9..a7ffa4fbd4 100644
--- a/guides/source/api_documentation_guidelines.md
+++ b/guides/source/api_documentation_guidelines.md
@@ -15,7 +15,7 @@ After reading this guide, you will know:
 RDoc
 ----
 
-The [Rails API documentation](http://api.rubyonrails.org) is generated with
+The [Rails API documentation](https://api.rubyonrails.org) is generated with
 [RDoc](https://ruby.github.io/rdoc/). To generate it, make sure you are
 in the rails root directory, run `bundle install` and execute:
 
diff --git a/guides/source/asset_pipeline.md b/guides/source/asset_pipeline.md
index 9f8edea598..454613e733 100644
--- a/guides/source/asset_pipeline.md
+++ b/guides/source/asset_pipeline.md
@@ -126,7 +126,7 @@ The query string strategy has several disadvantages:
 1. **Not all caches will reliably cache content where the filename only differs by
 query parameters**
 
-    [Steve Souders recommends](http://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/),
+    [Steve Souders recommends](https://www.stevesouders.com/blog/2008/08/23/revving-filenames-dont-use-querystring/),
  "...avoiding a querystring for cacheable resources". He found that in this
 case 5-20% of requests will not be cached. Query strings in particular do not
 work at all with some CDNs for cache invalidation.
@@ -489,7 +489,7 @@ one, requiring all stylesheets from the current directory.
 In this example, `require_self` is used. This puts the CSS contained within the
 file (if any) at the precise location of the `require_self` call.
 
-NOTE. If you want to use multiple Sass files, you should generally use the [Sass `@import` rule](http://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#import)
+NOTE. If you want to use multiple Sass files, you should generally use the [Sass `@import` rule](https://sass-lang.com/docs/yardoc/file.SASS_REFERENCE.html#import)
 instead of these Sprockets directives. When using Sprockets directives, Sass files exist within
 their own scope, making variables or mixins only available within the document they were defined in.
 
@@ -961,7 +961,7 @@ is present.
 ##### CDN Header Debugging
 
 One way to check the headers are cached properly in your CDN is by using [curl](
-http://explainshell.com/explain?cmd=curl+-I+http%3A%2F%2Fwww.example.com). You
+https://explainshell.com/explain?cmd=curl+-I+http%3A%2F%2Fwww.example.com). You
 can request the headers from both your server and your CDN to verify they are
 the same:
 
@@ -1009,7 +1009,7 @@ such as `X-Cache` or for any additional headers they may add.
 ##### CDNs and the Cache-Control Header
 
 The [cache control
-header](http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9) is a W3C
+header](https://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html#sec14.9) is a W3C
 specification that describes how a request can be cached. When no CDN is used, a
 browser will use this information to cache contents. This is very helpful for
 assets that are not modified so that a browser does not need to re-download a
@@ -1154,7 +1154,7 @@ The X-Sendfile header is a directive to the web server to ignore the response
 from the application, and instead serve a specified file from disk. This option
 is off by default, but can be enabled if your server supports it. When enabled,
 this passes responsibility for serving the file to the web server, which is
-faster. Have a look at [send_file](http://api.rubyonrails.org/classes/ActionController/DataStreaming.html#method-i-send_file)
+faster. Have a look at [send_file](https://api.rubyonrails.org/classes/ActionController/DataStreaming.html#method-i-send_file)
 on how to use this feature.
 
 Apache and NGINX support this option, which can be enabled in
@@ -1172,7 +1172,7 @@ and any other environments you define with production behavior (not
 
 TIP: For further details have a look at the docs of your production web server:
 - [Apache](https://tn123.org/mod_xsendfile/)
-- [NGINX](http://wiki.nginx.org/XSendfile)
+- [NGINX](https://www.nginx.com/resources/wiki/start/topics/examples/xsendfile/)
 
 Assets Cache Store
 ------------------
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md
index 38e46e4bf8..672faad6f1 100644
--- a/guides/source/association_basics.md
+++ b/guides/source/association_basics.md
@@ -1544,7 +1544,7 @@ The `collection.size` method returns the number of objects in the collection.
 ##### `collection.find(...)`
 
 The `collection.find` method finds objects within the collection. It uses the same syntax and options as
-[`ActiveRecord::Base.find`](http://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-find).
+[`ActiveRecord::Base.find`](https://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-find).
 
 ```ruby
 @available_book = @author.books.find(1)
@@ -1563,7 +1563,7 @@ The `collection.where` method finds objects within the collection based on the c
 
 The `collection.exists?` method checks whether an object meeting the supplied
 conditions exists in the collection. It uses the same syntax and options as
-[`ActiveRecord::Base.exists?`](http://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-exists-3F).
+[`ActiveRecord::Base.exists?`](https://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-exists-3F).
 
 ##### `collection.build(attributes = {}, ...)`
 
@@ -2077,7 +2077,7 @@ The `collection.size` method returns the number of objects in the collection.
 ##### `collection.find(...)`
 
 The `collection.find` method finds objects within the collection. It uses the same syntax and options as
-[`ActiveRecord::Base.find`](http://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-find).
+[`ActiveRecord::Base.find`](https://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-find).
 
 ```ruby
 @assembly = @part.assemblies.find(1)
@@ -2095,7 +2095,7 @@ The `collection.where` method finds objects within the collection based on the c
 
 The `collection.exists?` method checks whether an object meeting the supplied
 conditions exists in the collection. It uses the same syntax and options as
-[`ActiveRecord::Base.exists?`](http://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-exists-3F).
+[`ActiveRecord::Base.exists?`](https://api.rubyonrails.org/classes/ActiveRecord/FinderMethods.html#method-i-exists-3F).
 
 ##### `collection.build(attributes = {})`
 
diff --git a/guides/source/command_line.md b/guides/source/command_line.md
index bbebf97c3f..04c8352b90 100644
--- a/guides/source/command_line.md
+++ b/guides/source/command_line.md
@@ -248,7 +248,7 @@ Description:
     Create rails files for model generator.
 ```
 
-NOTE: For a list of available field types for the `type` parameter, refer to the [API documentation](http://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_column) for the add_column method for the `SchemaStatements` module. The `index` parameter generates a corresponding index for the column.
+NOTE: For a list of available field types for the `type` parameter, refer to the [API documentation](https://api.rubyonrails.org/classes/ActiveRecord/ConnectionAdapters/SchemaStatements.html#method-i-add_column) for the add_column method for the `SchemaStatements` module. The `index` parameter generates a corresponding index for the column.
 
 But instead of generating a model directly (which we'll be doing later), let's set up a scaffold. A **scaffold** in Rails is a full set of model, database migration for that model, controller to manipulate it, views to view and manipulate the data, and a test suite for each of the above.
 
diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index ad82614a0d..bf1c0f8674 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -106,7 +106,7 @@ application. Accepts a valid week day symbol (e.g. `:monday`).
 you don't want shown in the logs, such as passwords or credit card
 numbers. It also filters out sensitive values of database columns when call `#inspect` on an Active Record object. By default, Rails filters out passwords by adding `Rails.application.config.filter_parameters += [:password]` in `config/initializers/filter_parameter_logging.rb`. Parameters filter works by partial matching regular expression.
 
-* `config.force_ssl` forces all requests to be served over HTTPS by using the `ActionDispatch::SSL` middleware, and sets `config.action_mailer.default_url_options` to be `{ protocol: 'https' }`. This can be configured by setting `config.ssl_options` - see the [ActionDispatch::SSL documentation](http://api.rubyonrails.org/classes/ActionDispatch/SSL.html) for details.
+* `config.force_ssl` forces all requests to be served over HTTPS by using the `ActionDispatch::SSL` middleware, and sets `config.action_mailer.default_url_options` to be `{ protocol: 'https' }`. This can be configured by setting `config.ssl_options` - see the [ActionDispatch::SSL documentation](https://api.rubyonrails.org/classes/ActionDispatch/SSL.html) for details.
 
 * `config.log_formatter` defines the formatter of the Rails logger. This option defaults to an instance of `ActiveSupport::Logger::SimpleFormatter` for all modes. If you are setting a value for `config.logger` you must manually pass the value of your formatter to your logger before it is wrapped in an `ActiveSupport::TaggedLogging` instance, Rails will not do it for you.
 
@@ -727,7 +727,7 @@ There are a few configuration options available in Active Support:
 
 `config.active_job` provides the following configuration options:
 
-* `config.active_job.queue_adapter` sets the adapter for the queuing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](http://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
+* `config.active_job.queue_adapter` sets the adapter for the queuing backend. The default adapter is `:async`. For an up-to-date list of built-in adapters see the [ActiveJob::QueueAdapters API documentation](https://api.rubyonrails.org/classes/ActiveJob/QueueAdapters.html).
 
     ```ruby
     # Be sure to have the adapter's gem in your Gemfile
diff --git a/guides/source/contributing_to_ruby_on_rails.md b/guides/source/contributing_to_ruby_on_rails.md
index 709a5146e9..569f52652f 100644
--- a/guides/source/contributing_to_ruby_on_rails.md
+++ b/guides/source/contributing_to_ruby_on_rails.md
@@ -16,7 +16,7 @@ After reading this guide, you will know:
 Ruby on Rails is not "someone else's framework." Over the years, thousands of people have contributed to Ruby on Rails ranging from a single character to massive architectural changes or significant documentation - all with the goal of making Ruby on Rails better for everyone. Even if you don't feel up to writing code or documentation yet, there are a variety of other ways that you can contribute, from reporting issues to testing patches.
 
 As mentioned in [Rails'
-README](https://github.com/rails/rails/blob/master/README.md), everyone interacting in Rails and its sub-projects' codebases, issue trackers, chat rooms, and mailing lists is expected to follow the Rails [code of conduct](http://rubyonrails.org/conduct/).
+README](https://github.com/rails/rails/blob/master/README.md), everyone interacting in Rails and its sub-projects' codebases, issue trackers, chat rooms, and mailing lists is expected to follow the Rails [code of conduct](https://rubyonrails.org/conduct/).
 
 --------------------------------------------------------------------------------
 
@@ -53,7 +53,7 @@ You can then share your executable test case as a [gist](https://gist.github.com
 
 ### Special Treatment for Security Issues
 
-WARNING: Please do not report security vulnerabilities with public GitHub issue reports. The [Rails security policy page](http://rubyonrails.org/security) details the procedure to follow for security issues.
+WARNING: Please do not report security vulnerabilities with public GitHub issue reports. The [Rails security policy page](https://rubyonrails.org/security) details the procedure to follow for security issues.
 
 ### What about Feature Requests?
 
@@ -684,4 +684,4 @@ And then... think about your next contribution!
 Rails Contributors
 ------------------
 
-All contributions get credit in [Rails Contributors](http://contributors.rubyonrails.org).
+All contributions get credit in [Rails Contributors](https://contributors.rubyonrails.org).
diff --git a/guides/source/engines.md b/guides/source/engines.md
index 053e3aa16e..a00311bffb 100644
--- a/guides/source/engines.md
+++ b/guides/source/engines.md
@@ -1172,7 +1172,7 @@ end
 
 Using `Class#class_eval` is great for simple adjustments, but for more complex
 class modifications, you might want to consider using [`ActiveSupport::Concern`]
-(http://api.rubyonrails.org/classes/ActiveSupport/Concern.html).
+(https://api.rubyonrails.org/classes/ActiveSupport/Concern.html).
 ActiveSupport::Concern manages load order of interlinked dependent modules and
 classes at run time allowing you to significantly modularize your code.
 
diff --git a/guides/source/form_helpers.md b/guides/source/form_helpers.md
index b5e2c49487..b6674ae7dd 100644
--- a/guides/source/form_helpers.md
+++ b/guides/source/form_helpers.md
@@ -17,7 +17,7 @@ After reading this guide, you will know:
 
 --------------------------------------------------------------------------------
 
-NOTE: This guide is not intended to be a complete documentation of available form helpers and their arguments. Please visit [the Rails API documentation](http://api.rubyonrails.org/) for a complete reference.
+NOTE: This guide is not intended to be a complete documentation of available form helpers and their arguments. Please visit [the Rails API documentation](https://api.rubyonrails.org/) for a complete reference.
 
 Dealing with Basic Forms
 ------------------------
@@ -89,7 +89,7 @@ value entered by the user for that field. For example, if the form contains
 `<%= text_field_tag(:query) %>`, then you would be able to get the value of this
 field in the controller with `params[:query]`.
 
-When naming inputs, Rails uses certain conventions that make it possible to submit parameters with non-scalar values such as arrays or hashes, which will also be accessible in `params`. You can read more about them in chapter [Understanding Parameter Naming Conventions](#understanding-parameter-naming-conventions) of this guide. For details on the precise usage of these helpers, please refer to the [API documentation](http://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html).
+When naming inputs, Rails uses certain conventions that make it possible to submit parameters with non-scalar values such as arrays or hashes, which will also be accessible in `params`. You can read more about them in chapter [Understanding Parameter Naming Conventions](#understanding-parameter-naming-conventions) of this guide. For details on the precise usage of these helpers, please refer to the [API documentation](https://api.rubyonrails.org/classes/ActionView/Helpers/FormTagHelper.html).
 
 #### Checkboxes
 
@@ -527,13 +527,13 @@ NOTE: Pairs passed to `options_for_select` should have the text first and the va
 
 ### Time Zone and Country Select
 
-To leverage time zone support in Rails, you have to ask your users what time zone they are in. Doing so would require generating select options from a list of pre-defined [`ActiveSupport::TimeZone`](http://api.rubyonrails.org/classes/ActiveSupport/TimeZone.html) objects using `collection_select`, but you can simply use the `time_zone_select` helper that already wraps this:
+To leverage time zone support in Rails, you have to ask your users what time zone they are in. Doing so would require generating select options from a list of pre-defined [`ActiveSupport::TimeZone`](https://api.rubyonrails.org/classes/ActiveSupport/TimeZone.html) objects using `collection_select`, but you can simply use the `time_zone_select` helper that already wraps this:
 
 ```erb
 <%= time_zone_select(:person, :time_zone) %>
 ```
 
-There is also `time_zone_options_for_select` helper for a more manual (therefore more customizable) way of doing this. Read the [API documentation](http://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-time_zone_options_for_select) to learn about the possible arguments for these two methods.
+There is also `time_zone_options_for_select` helper for a more manual (therefore more customizable) way of doing this. Read the [API documentation](https://api.rubyonrails.org/classes/ActionView/Helpers/FormOptionsHelper.html#method-i-time_zone_options_for_select) to learn about the possible arguments for these two methods.
 
 Rails _used_ to have a `country_select` helper for choosing countries, but this has been extracted to the [country_select plugin](https://github.com/stefanpenner/country_select).
 
@@ -604,7 +604,7 @@ When this is passed to `Person.new` (or `update`), Active Record spots that thes
 
 ### Common Options
 
-Both families of helpers use the same core set of functions to generate the individual select tags and so both accept largely the same options. In particular, by default Rails will generate year options 5 years either side of the current year. If this is not an appropriate range, the `:start_year` and `:end_year` options override this. For an exhaustive list of the available options, refer to the [API documentation](http://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html).
+Both families of helpers use the same core set of functions to generate the individual select tags and so both accept largely the same options. In particular, by default Rails will generate year options 5 years either side of the current year. If this is not an appropriate range, the `:start_year` and `:end_year` options override this. For an exhaustive list of the available options, refer to the [API documentation](https://api.rubyonrails.org/classes/ActionView/Helpers/DateHelper.html).
 
 As a rule of thumb you should be using `date_select` when working with model objects and `select_date` in other cases, such as a search form which filters results by date.
 
@@ -642,7 +642,7 @@ Rails provides the usual pair of helpers: the barebones `file_field_tag` and the
 
 ### What Gets Uploaded
 
-The object in the `params` hash is an instance of [`ActionDispatch::Http::UploadedFile`](http://api.rubyonrails.org/classes/ActionDispatch/Http/UploadedFile.html). The following snippet saves the uploaded file in `#{Rails.root}/public/uploads` under the same name as the original file.
+The object in the `params` hash is an instance of [`ActionDispatch::Http::UploadedFile`](https://api.rubyonrails.org/classes/ActionDispatch/Http/UploadedFile.html). The following snippet saves the uploaded file in `#{Rails.root}/public/uploads` under the same name as the original file.
 
 ```ruby
 def upload
@@ -658,7 +658,7 @@ Once a file has been uploaded, there are a multitude of potential tasks, ranging
 Customizing Form Builders
 -------------------------
 
-The object yielded by `form_with` and `fields_for` is an instance of [`ActionView::Helpers::FormBuilder`](http://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html). Form builders encapsulate the notion of displaying form elements for a single object. While you can write helpers for your forms in the usual way, you can also create subclass `ActionView::Helpers::FormBuilder` and add the helpers there. For example:
+The object yielded by `form_with` and `fields_for` is an instance of [`ActionView::Helpers::FormBuilder`](https://api.rubyonrails.org/classes/ActionView/Helpers/FormBuilder.html). Form builders encapsulate the notion of displaying form elements for a single object. While you can write helpers for your forms in the usual way, you can also create subclass `ActionView::Helpers::FormBuilder` and add the helpers there. For example:
 
 ```erb
 <%= form_with model: @person do |f| %>
diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md
index de72f72e01..e486c53fe3 100644
--- a/guides/source/getting_started.md
+++ b/guides/source/getting_started.md
@@ -1209,7 +1209,7 @@ view above, will cause form helpers to fill in form fields with the correspondin
 values of the object.  Passing in a symbol scope such as `scope: :article`, as
 was done in the new view, only creates empty form fields.
 More details can be found in [form_with documentation]
-(http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with).
+(https://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with).
 
 Next, we need to create the `update` action in
 `app/controllers/articles_controller.rb`.
@@ -1345,7 +1345,7 @@ to stand in for either of the other forms is that `@article` is a *resource*
 corresponding to a full set of RESTful routes, and Rails is able to infer
 which URI and method to use.
 For more information about this use of `form_with`, see [Resource-oriented style]
-(http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with-label-Resource-oriented+style).
+(https://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with-label-Resource-oriented+style).
 
 Now, let's update the `app/views/articles/new.html.erb` view to use this new
 partial, rewriting it completely:
diff --git a/guides/source/i18n.md b/guides/source/i18n.md
index d146685675..dab73bfbc2 100644
--- a/guides/source/i18n.md
+++ b/guides/source/i18n.md
@@ -222,7 +222,7 @@ This approach has almost the same set of advantages as setting the locale from t
 
 Getting the locale from `params` and setting it accordingly is not hard; including it in every URL and thus **passing it through the requests** is. To include an explicit option in every URL, e.g. `link_to(books_url(locale: I18n.locale))`, would be tedious and probably impossible, of course.
 
-Rails contains infrastructure for "centralizing dynamic decisions about the URLs" in its [`ApplicationController#default_url_options`](http://api.rubyonrails.org/classes/ActionDispatch/Routing/Mapper/Base.html#method-i-default_url_options), which is useful precisely in this scenario: it enables us to set "defaults" for [`url_for`](http://api.rubyonrails.org/classes/ActionDispatch/Routing/UrlFor.html#method-i-url_for) and helper methods dependent on it (by implementing/overriding `default_url_options`).
+Rails contains infrastructure for "centralizing dynamic decisions about the URLs" in its [`ApplicationController#default_url_options`](https://api.rubyonrails.org/classes/ActionDispatch/Routing/Mapper/Base.html#method-i-default_url_options), which is useful precisely in this scenario: it enables us to set "defaults" for [`url_for`](https://api.rubyonrails.org/classes/ActionDispatch/Routing/UrlFor.html#method-i-url_for) and helper methods dependent on it (by implementing/overriding `default_url_options`).
 
 We can include something like this in our `ApplicationController` then:
 
@@ -237,7 +237,7 @@ Every helper method dependent on `url_for` (e.g. helpers for named routes like `
 
 You may be satisfied with this. It does impact the readability of URLs, though, when the locale "hangs" at the end of every URL in your application. Moreover, from the architectural standpoint, locale is usually hierarchically above the other parts of the application domain: and URLs should reflect this.
 
-You probably want URLs to look like this: `http://www.example.com/en/books` (which loads the English locale) and `http://www.example.com/nl/books` (which loads the Dutch locale). This is achievable with the "over-riding `default_url_options`" strategy from above: you just have to set up your routes with [`scope`](http://api.rubyonrails.org/classes/ActionDispatch/Routing/Mapper/Scoping.html):
+You probably want URLs to look like this: `http://www.example.com/en/books` (which loads the English locale) and `http://www.example.com/nl/books` (which loads the Dutch locale). This is achievable with the "over-riding `default_url_options`" strategy from above: you just have to set up your routes with [`scope`](https://api.rubyonrails.org/classes/ActionDispatch/Routing/Mapper/Scoping.html):
 
 ```ruby
 # config/routes.rb
@@ -596,7 +596,7 @@ You should have a good understanding of using the i18n library now and know how
 to internationalize a basic Rails application. In the following chapters, we'll
 cover its features in more depth.
 
-These chapters will show examples using both the `I18n.translate` method as well as the [`translate` view helper method](http://api.rubyonrails.org/classes/ActionView/Helpers/TranslationHelper.html#method-i-translate) (noting the additional feature provide by the view helper method).
+These chapters will show examples using both the `I18n.translate` method as well as the [`translate` view helper method](https://api.rubyonrails.org/classes/ActionView/Helpers/TranslationHelper.html#method-i-translate) (noting the additional feature provide by the view helper method).
 
 Covered are features like these:
 
diff --git a/guides/source/layout.html.erb b/guides/source/layout.html.erb
index 65a003fceb..3ffd7ff1ac 100644
--- a/guides/source/layout.html.erb
+++ b/guides/source/layout.html.erb
@@ -30,14 +30,14 @@
   <% end %>
   <div id="topNav">
     <div class="wrapper">
-      <strong class="more-info-label">More at <a href="http://rubyonrails.org/">rubyonrails.org:</a> </strong>
+      <strong class="more-info-label">More at <a href="https://rubyonrails.org/">rubyonrails.org:</a> </strong>
       <span class="red-button more-info-button">
         More Ruby on Rails
       </span>
       <ul class="more-info-links s-hidden">
         <li class="more-info"><a href="https://weblog.rubyonrails.org/">Blog</a></li>
         <li class="more-info"><a href="https://guides.rubyonrails.org/">Guides</a></li>
-        <li class="more-info"><a href="http://api.rubyonrails.org/">API</a></li>
+        <li class="more-info"><a href="https://api.rubyonrails.org/">API</a></li>
         <li class="more-info"><a href="https://stackoverflow.com/questions/tagged/ruby-on-rails">Ask for help</a></li>
         <li class="more-info"><a href="https://github.com/rails/rails">Contribute on GitHub</a></li>
       </ul>
diff --git a/guides/source/layouts_and_rendering.md b/guides/source/layouts_and_rendering.md
index ad08e5a5a9..a2ae4ea59e 100644
--- a/guides/source/layouts_and_rendering.md
+++ b/guides/source/layouts_and_rendering.md
@@ -97,7 +97,7 @@ If we want to display the properties of all the books in our view, we can do so
 <%= link_to "New book", new_book_path %>
 ```
 
-NOTE: The actual rendering is done by nested classes of the module [`ActionView::Template::Handlers`](http://api.rubyonrails.org/classes/ActionView/Template/Handlers.html). This guide does not dig into that process, but it's important to know that the file extension on your view controls the choice of template handler.
+NOTE: The actual rendering is done by nested classes of the module [`ActionView::Template::Handlers`](https://api.rubyonrails.org/classes/ActionView/Template/Handlers.html). This guide does not dig into that process, but it's important to know that the file extension on your view controls the choice of template handler.
 
 ### Using `render`
 
diff --git a/guides/source/routing.md b/guides/source/routing.md
index 92d5b45e7d..9406a4bf0c 100644
--- a/guides/source/routing.md
+++ b/guides/source/routing.md
@@ -1211,7 +1211,7 @@ TIP: You'll find that the output from `rails routes` is much more readable if yo
 
 ### Testing Routes
 
-Routes should be included in your testing strategy (just like the rest of your application). Rails offers three [built-in assertions](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html) designed to make testing routes simpler:
+Routes should be included in your testing strategy (just like the rest of your application). Rails offers three [built-in assertions](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html) designed to make testing routes simpler:
 
 * `assert_generates`
 * `assert_recognizes`
diff --git a/guides/source/ruby_on_rails_guides_guidelines.md b/guides/source/ruby_on_rails_guides_guidelines.md
index 4b56cf6296..67b0e523a7 100644
--- a/guides/source/ruby_on_rails_guides_guidelines.md
+++ b/guides/source/ruby_on_rails_guides_guidelines.md
@@ -58,7 +58,7 @@ Links to the API (`api.rubyonrails.org`) are processed by the guides generator i
 Links that include a release tag are left untouched. For example
 
 ```
-http://api.rubyonrails.org/v5.0.1/classes/ActiveRecord/Attributes/ClassMethods.html
+https://api.rubyonrails.org/v5.0.1/classes/ActiveRecord/Attributes/ClassMethods.html
 ```
 
 is not modified.
@@ -68,25 +68,25 @@ Please use these in release notes, since they should point to the corresponding
 If the link does not include a release tag and edge guides are being generated, the domain is replaced by `edgeapi.rubyonrails.org`. For example,
 
 ```
-http://api.rubyonrails.org/classes/ActionDispatch/Response.html
+https://api.rubyonrails.org/classes/ActionDispatch/Response.html
 ```
 
 becomes
 
 ```
-http://edgeapi.rubyonrails.org/classes/ActionDispatch/Response.html
+https://edgeapi.rubyonrails.org/classes/ActionDispatch/Response.html
 ```
 
 If the link does not include a release tag and release guides are being generated, the Rails version is injected. For example, if we are generating the guides for v5.1.0 the link
 
 ```
-http://api.rubyonrails.org/classes/ActionDispatch/Response.html
+https://api.rubyonrails.org/classes/ActionDispatch/Response.html
 ```
 
 becomes
 
 ```
-http://api.rubyonrails.org/v5.1.0/classes/ActionDispatch/Response.html
+https://api.rubyonrails.org/v5.1.0/classes/ActionDispatch/Response.html
 ```
 
 Please don't link to `edgeapi.rubyonrails.org` manually.
diff --git a/guides/source/security.md b/guides/source/security.md
index a2fb4663cf..22c122d4b9 100644
--- a/guides/source/security.md
+++ b/guides/source/security.md
@@ -92,12 +92,12 @@ limitations of it:
 * Rails encrypts cookies by default. The client cannot read or edit the contents of the cookie, without breaking encryption. If you take appropriate care of your secrets, you can consider your cookies to be generally secured.
 
 The `CookieStore` uses the
-[encrypted](http://api.rubyonrails.org/classes/ActionDispatch/Cookies/ChainedCookieJars.html#method-i-encrypted)
+[encrypted](https://api.rubyonrails.org/classes/ActionDispatch/Cookies/ChainedCookieJars.html#method-i-encrypted)
 cookie jar to provide a secure, encrypted location to store session
 data. Cookie-based sessions thus provide both integrity as well as
 confidentiality to their contents. The encryption key, as well as the
 verification key used for
-[signed](http://api.rubyonrails.org/classes/ActionDispatch/Cookies/ChainedCookieJars.html#method-i-signed)
+[signed](https://api.rubyonrails.org/classes/ActionDispatch/Cookies/ChainedCookieJars.html#method-i-signed)
 cookies, is derived from the `secret_key_base` configuration value.
 
 TIP: Secrets must be long and random. Use `rails secret` to get new unique secrets.
@@ -155,9 +155,9 @@ rotations going at any one time.
 For more details on key rotation with encrypted and signed messages as
 well as the various options the `rotate` method accepts, please refer to
 the
-[MessageEncryptor API](http://api.rubyonrails.org/classes/ActiveSupport/MessageEncryptor.html)
+[MessageEncryptor API](https://api.rubyonrails.org/classes/ActiveSupport/MessageEncryptor.html)
 and
-[MessageVerifier API](http://api.rubyonrails.org/classes/ActiveSupport/MessageVerifier.html)
+[MessageVerifier API](https://api.rubyonrails.org/classes/ActiveSupport/MessageVerifier.html)
 documentation.
 
 ### Replay Attacks for CookieStore Sessions
@@ -1151,7 +1151,7 @@ The same works with `javascript_include_tag`:
 <%= javascript_include_tag "script", nonce: true %>
 ```
 
-Use [`csp_meta_tag`](http://api.rubyonrails.org/classes/ActionView/Helpers/CspHelper.html#method-i-csp_meta_tag)
+Use [`csp_meta_tag`](https://api.rubyonrails.org/classes/ActionView/Helpers/CspHelper.html#method-i-csp_meta_tag)
 helper to create a meta tag "csp-nonce" with the per-session nonce value
 for allowing inline `<script>` tags.
 
diff --git a/guides/source/testing.md b/guides/source/testing.md
index 9667521f3b..623380970e 100644
--- a/guides/source/testing.md
+++ b/guides/source/testing.md
@@ -350,15 +350,15 @@ Rails adds some custom assertions of its own to the `minitest` framework:
 
 | Assertion                                                                         | Purpose |
 | --------------------------------------------------------------------------------- | ------- |
-| [`assert_difference(expressions, difference = 1, message = nil) {...}`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_difference) | Test numeric difference between the return value of an expression as a result of what is evaluated in the yielded block.|
-| [`assert_no_difference(expressions, message = nil, &block)`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_no_difference) | Asserts that the numeric result of evaluating an expression is not changed before and after invoking the passed in block.|
-| [`assert_changes(expressions, message = nil, from:, to:, &block)`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_changes) | Test that the result of evaluating an expression is changed after invoking the passed in block.|
-| [`assert_no_changes(expressions, message = nil, &block)`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_no_changes) | Test the result of evaluating an expression is not changed after invoking the passed in block.|
-| [`assert_nothing_raised { block }`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_nothing_raised) | Ensures that the given block doesn't raise any exceptions.|
-| [`assert_recognizes(expected_options, path, extras={}, message=nil)`](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html#method-i-assert_recognizes) | Asserts that the routing of the given path was handled correctly and that the parsed options (given in the expected_options hash) match path. Basically, it asserts that Rails recognizes the route given by expected_options.|
-| [`assert_generates(expected_path, options, defaults={}, extras = {}, message=nil)`](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html#method-i-assert_generates) | Asserts that the provided options can be used to generate the provided path. This is the inverse of assert_recognizes. The extras parameter is used to tell the request the names and values of additional request parameters that would be in a query string. The message parameter allows you to specify a custom error message for assertion failures.|
-| [`assert_response(type, message = nil)`](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/ResponseAssertions.html#method-i-assert_response) | Asserts that the response comes with a specific status code. You can specify `:success` to indicate 200-299, `:redirect` to indicate 300-399, `:missing` to indicate 404, or `:error` to match the 500-599 range. You can also pass an explicit status number or its symbolic equivalent. For more information, see [full list of status codes](http://rubydoc.info/github/rack/rack/master/Rack/Utils#HTTP_STATUS_CODES-constant) and how their [mapping](http://rubydoc.info/github/rack/rack/master/Rack/Utils#SYMBOL_TO_STATUS_CODE-constant) works.|
-| [`assert_redirected_to(options = {}, message=nil)`](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/ResponseAssertions.html#method-i-assert_redirected_to) | Asserts that the redirection options passed in match those of the redirect called in the latest action. This match can be partial, such that `assert_redirected_to(controller: "weblog")` will also match the redirection of `redirect_to(controller: "weblog", action: "show")` and so on. You can also pass named routes such as `assert_redirected_to root_path` and Active Record objects such as `assert_redirected_to @article`.|
+| [`assert_difference(expressions, difference = 1, message = nil) {...}`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_difference) | Test numeric difference between the return value of an expression as a result of what is evaluated in the yielded block.|
+| [`assert_no_difference(expressions, message = nil, &block)`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_no_difference) | Asserts that the numeric result of evaluating an expression is not changed before and after invoking the passed in block.|
+| [`assert_changes(expressions, message = nil, from:, to:, &block)`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_changes) | Test that the result of evaluating an expression is changed after invoking the passed in block.|
+| [`assert_no_changes(expressions, message = nil, &block)`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_no_changes) | Test the result of evaluating an expression is not changed after invoking the passed in block.|
+| [`assert_nothing_raised { block }`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/Assertions.html#method-i-assert_nothing_raised) | Ensures that the given block doesn't raise any exceptions.|
+| [`assert_recognizes(expected_options, path, extras={}, message=nil)`](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html#method-i-assert_recognizes) | Asserts that the routing of the given path was handled correctly and that the parsed options (given in the expected_options hash) match path. Basically, it asserts that Rails recognizes the route given by expected_options.|
+| [`assert_generates(expected_path, options, defaults={}, extras = {}, message=nil)`](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html#method-i-assert_generates) | Asserts that the provided options can be used to generate the provided path. This is the inverse of assert_recognizes. The extras parameter is used to tell the request the names and values of additional request parameters that would be in a query string. The message parameter allows you to specify a custom error message for assertion failures.|
+| [`assert_response(type, message = nil)`](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/ResponseAssertions.html#method-i-assert_response) | Asserts that the response comes with a specific status code. You can specify `:success` to indicate 200-299, `:redirect` to indicate 300-399, `:missing` to indicate 404, or `:error` to match the 500-599 range. You can also pass an explicit status number or its symbolic equivalent. For more information, see [full list of status codes](http://rubydoc.info/github/rack/rack/master/Rack/Utils#HTTP_STATUS_CODES-constant) and how their [mapping](https://rubydoc.info/github/rack/rack/master/Rack/Utils#SYMBOL_TO_STATUS_CODE-constant) works.|
+| [`assert_redirected_to(options = {}, message=nil)`](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/ResponseAssertions.html#method-i-assert_redirected_to) | Asserts that the redirection options passed in match those of the redirect called in the latest action. This match can be partial, such that `assert_redirected_to(controller: "weblog")` will also match the redirection of `redirect_to(controller: "weblog", action: "show")` and so on. You can also pass named routes such as `assert_redirected_to root_path` and Active Record objects such as `assert_redirected_to @article`.|
 
 You'll see the usage of some of these assertions in the next chapter.
 
@@ -366,13 +366,13 @@ You'll see the usage of some of these assertions in the next chapter.
 
 All the basic assertions such as `assert_equal` defined in `Minitest::Assertions` are also available in the classes we use in our own test cases. In fact, Rails provides the following classes for you to inherit from:
 
-* [`ActiveSupport::TestCase`](http://api.rubyonrails.org/classes/ActiveSupport/TestCase.html)
-* [`ActionMailer::TestCase`](http://api.rubyonrails.org/classes/ActionMailer/TestCase.html)
-* [`ActionView::TestCase`](http://api.rubyonrails.org/classes/ActionView/TestCase.html)
-* [`ActiveJob::TestCase`](http://api.rubyonrails.org/classes/ActiveJob/TestCase.html)
-* [`ActionDispatch::IntegrationTest`](http://api.rubyonrails.org/classes/ActionDispatch/IntegrationTest.html)
-* [`ActionDispatch::SystemTestCase`](http://api.rubyonrails.org/classes/ActionDispatch/SystemTestCase.html)
-* [`Rails::Generators::TestCase`](http://api.rubyonrails.org/classes/Rails/Generators/TestCase.html)
+* [`ActiveSupport::TestCase`](https://api.rubyonrails.org/classes/ActiveSupport/TestCase.html)
+* [`ActionMailer::TestCase`](https://api.rubyonrails.org/classes/ActionMailer/TestCase.html)
+* [`ActionView::TestCase`](https://api.rubyonrails.org/classes/ActionView/TestCase.html)
+* [`ActiveJob::TestCase`](https://api.rubyonrails.org/classes/ActiveJob/TestCase.html)
+* [`ActionDispatch::IntegrationTest`](https://api.rubyonrails.org/classes/ActionDispatch/IntegrationTest.html)
+* [`ActionDispatch::SystemTestCase`](https://api.rubyonrails.org/classes/ActionDispatch/SystemTestCase.html)
+* [`Rails::Generators::TestCase`](https://api.rubyonrails.org/classes/Rails/Generators/TestCase.html)
 
 Each of these classes include `Minitest::Assertions`, allowing us to use all of the basic assertions in our tests.
 
@@ -572,7 +572,7 @@ be rebuilt. This can be done by executing `rails db:test:prepare`.
 
 For good tests, you'll need to give some thought to setting up test data.
 In Rails, you can handle this by defining and customizing fixtures.
-You can find comprehensive documentation in the [Fixtures API documentation](http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html).
+You can find comprehensive documentation in the [Fixtures API documentation](https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html).
 
 #### What Are Fixtures?
 
@@ -621,7 +621,7 @@ first:
 
 Notice the `category` key of the `first` article found in `fixtures/articles.yml` has a value of `about`. This tells Rails to load the category `about` found in `fixtures/categories.yml`.
 
-NOTE: For associations to reference one another by name, you can use the fixture name instead of specifying the `id:` attribute on the associated fixtures. Rails will auto assign a primary key to be consistent between runs. For more information on this association behavior please read the [Fixtures API documentation](http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html).
+NOTE: For associations to reference one another by name, you can use the fixture name instead of specifying the `id:` attribute on the associated fixtures. Rails will auto assign a primary key to be consistent between runs. For more information on this association behavior please read the [Fixtures API documentation](https://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html).
 
 #### ERB'in It Up
 
@@ -684,7 +684,7 @@ create  test/models/article_test.rb
 create  test/fixtures/articles.yml
 ```
 
-Model tests don't have their own superclass like `ActionMailer::TestCase` instead they inherit from [`ActiveSupport::TestCase`](http://api.rubyonrails.org/classes/ActiveSupport/TestCase.html).
+Model tests don't have their own superclass like `ActionMailer::TestCase` instead they inherit from [`ActiveSupport::TestCase`](https://api.rubyonrails.org/classes/ActiveSupport/TestCase.html).
 
 System Testing
 --------------
@@ -932,11 +932,11 @@ Here the test is inheriting from `ActionDispatch::IntegrationTest`. This makes s
 
 In addition to the standard testing helpers, inheriting from `ActionDispatch::IntegrationTest` comes with some additional helpers available when writing integration tests. Let's get briefly introduced to the three categories of helpers we get to choose from.
 
-For dealing with the integration test runner, see [`ActionDispatch::Integration::Runner`](http://api.rubyonrails.org/classes/ActionDispatch/Integration/Runner.html).
+For dealing with the integration test runner, see [`ActionDispatch::Integration::Runner`](https://api.rubyonrails.org/classes/ActionDispatch/Integration/Runner.html).
 
-When performing requests, we will have [`ActionDispatch::Integration::RequestHelpers`](http://api.rubyonrails.org/classes/ActionDispatch/Integration/RequestHelpers.html) available for our use.
+When performing requests, we will have [`ActionDispatch::Integration::RequestHelpers`](https://api.rubyonrails.org/classes/ActionDispatch/Integration/RequestHelpers.html) available for our use.
 
-If we need to modify the session, or state of our integration test, take a look at [`ActionDispatch::Integration::Session`](http://api.rubyonrails.org/classes/ActionDispatch/Integration/Session.html) to help.
+If we need to modify the session, or state of our integration test, take a look at [`ActionDispatch::Integration::Session`](https://api.rubyonrails.org/classes/ActionDispatch/Integration/Session.html) to help.
 
 ### Implementing an integration test
 
@@ -1454,7 +1454,7 @@ Like everything else in your Rails application, you can test your routes. Route
 
 NOTE: If your application has complex routes, Rails provides a number of useful helpers to test them.
 
-For more information on routing assertions available in Rails, see the API documentation for [`ActionDispatch::Assertions::RoutingAssertions`](http://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html).
+For more information on routing assertions available in Rails, see the API documentation for [`ActionDispatch::Assertions::RoutingAssertions`](https://api.rubyonrails.org/classes/ActionDispatch/Assertions/RoutingAssertions.html).
 
 Testing Views
 -------------
@@ -1712,7 +1712,7 @@ no jobs have already been executed in the scope of each test.
 
 ### Custom Assertions And Testing Jobs Inside Other Components
 
-Active Job ships with a bunch of custom assertions that can be used to lessen the verbosity of tests. For a full list of available assertions, see the API documentation for [`ActiveJob::TestHelper`](http://api.rubyonrails.org/classes/ActiveJob/TestHelper.html).
+Active Job ships with a bunch of custom assertions that can be used to lessen the verbosity of tests. For a full list of available assertions, see the API documentation for [`ActiveJob::TestHelper`](https://api.rubyonrails.org/classes/ActiveJob/TestHelper.html).
 
 It's a good practice to ensure that your jobs correctly get enqueued or performed
 wherever you invoke them (e.g. inside your controllers). This is precisely where
@@ -1775,7 +1775,7 @@ test "connects with cookies" do
 end
 ```
 
-See the API documentation for [`ActionCable::Connection::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Connection/TestCase.html) for more information.
+See the API documentation for [`ActionCable::Connection::TestCase`](https://api.rubyonrails.org/classes/ActionCable/Connection/TestCase.html) for more information.
 
 ### Channel Test Case
 
@@ -1815,11 +1815,11 @@ class WebNotificationsChannelTest < ActionCable::Channel::TestCase
 end
 ```
 
-See the API documentation for [`ActionCable::Channel::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
+See the API documentation for [`ActionCable::Channel::TestCase`](https://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
 
 ### Custom Assertions And Testing Broadcasts Inside Other Components
 
-Action Cable ships with a bunch of custom assertions that can be used to lessen the verbosity of tests. For a full list of available assertions, see the API documentation for [`ActionCable::TestHelper`](http://api.rubyonrails.org/classes/ActionCable/TestHelper.html).
+Action Cable ships with a bunch of custom assertions that can be used to lessen the verbosity of tests. For a full list of available assertions, see the API documentation for [`ActionCable::TestHelper`](https://api.rubyonrails.org/classes/ActionCable/TestHelper.html).
 
 It's a good practice to ensure that the correct message has been broadcasted inside other components (e.g. inside your controllers). This is precisely where
 the custom assertions provided by Action Cable are pretty useful. For instance,
@@ -1871,7 +1871,7 @@ Additional Testing Resources
 
 Rails provides built-in helper methods that enable you to assert that your time-sensitive code works as expected.
 
-Here is an example using the [`travel_to`](http://api.rubyonrails.org/classes/ActiveSupport/Testing/TimeHelpers.html#method-i-travel_to) helper:
+Here is an example using the [`travel_to`](https://api.rubyonrails.org/classes/ActiveSupport/Testing/TimeHelpers.html#method-i-travel_to) helper:
 
 ```ruby
 # Lets say that a user is eligible for gifting a month after they register.
@@ -1884,5 +1884,5 @@ end
 assert_equal Date.new(2004, 10, 24), user.activation_date # The change was visible only inside the `travel_to` block.
 ```
 
-Please see [`ActiveSupport::Testing::TimeHelpers` API Documentation](http://api.rubyonrails.org/classes/ActiveSupport/Testing/TimeHelpers.html)
+Please see [`ActiveSupport::Testing::TimeHelpers` API Documentation](https://api.rubyonrails.org/classes/ActiveSupport/Testing/TimeHelpers.html)
 for in-depth information about the available time helpers.
diff --git a/guides/source/upgrading_ruby_on_rails.md b/guides/source/upgrading_ruby_on_rails.md
index 1f30ce1971..79bad8f4ed 100644
--- a/guides/source/upgrading_ruby_on_rails.md
+++ b/guides/source/upgrading_ruby_on_rails.md
@@ -658,7 +658,7 @@ gem 'rails-deprecated_sanitizer'
 
 ### Rails DOM Testing
 
-The [`TagAssertions` module](http://api.rubyonrails.org/v4.1/classes/ActionDispatch/Assertions/TagAssertions.html) (containing methods such as `assert_tag`), [has been deprecated](https://github.com/rails/rails/blob/6061472b8c310158a2a2e8e9a6b81a1aef6b60fe/actionpack/lib/action_dispatch/testing/assertions/dom.rb) in favor of the `assert_select` methods from the `SelectorAssertions` module, which has been extracted into the [rails-dom-testing gem](https://github.com/rails/rails-dom-testing).
+The [`TagAssertions` module](https://api.rubyonrails.org/v4.1/classes/ActionDispatch/Assertions/TagAssertions.html) (containing methods such as `assert_tag`), [has been deprecated](https://github.com/rails/rails/blob/6061472b8c310158a2a2e8e9a6b81a1aef6b60fe/actionpack/lib/action_dispatch/testing/assertions/dom.rb) in favor of the `assert_select` methods from the `SelectorAssertions` module, which has been extracted into the [rails-dom-testing gem](https://github.com/rails/rails-dom-testing).
 
 
 ### Masked Authenticity Tokens
diff --git a/guides/source/working_with_javascript_in_rails.md b/guides/source/working_with_javascript_in_rails.md
index c36b3faa6c..8cf8efefd0 100644
--- a/guides/source/working_with_javascript_in_rails.md
+++ b/guides/source/working_with_javascript_in_rails.md
@@ -160,7 +160,7 @@ remote elements inside your application.
 
 #### form_with
 
-[`form_with`](http://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with)
+[`form_with`](https://api.rubyonrails.org/classes/ActionView/Helpers/FormHelper.html#method-i-form_with)
 is a helper that assists with writing forms. By default, `form_with` assumes that
 your form will be using Ajax. You can opt out of this behavior by
 passing the `:local` option `form_with`.
@@ -204,7 +204,7 @@ have been bundled into `event.detail`. For information about the previously used
 
 #### link_to
 
-[`link_to`](http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to)
+[`link_to`](https://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-link_to)
 is a helper that assists with generating links. It has a `:remote` option you
 can use like this:
 
@@ -236,7 +236,7 @@ $ ->
 
 #### button_to
 
-[`button_to`](http://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-button_to) is a helper that helps you create buttons. It has a `:remote` option that you can call like this:
+[`button_to`](https://api.rubyonrails.org/classes/ActionView/Helpers/UrlHelper.html#method-i-button_to) is a helper that helps you create buttons. It has a `:remote` option that you can call like this:
 
 ```erb
 <%= button_to "An article", @article, remote: true %>