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README.md 57a9bcd721 entrees block is displaying well and interact with map on mouse hover, map nodes are well drawn centered, map performance improvements, added domain contrib module and configured domain for mobile display 6 лет назад
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domain_alias.links.action.yml 57a9bcd721 entrees block is displaying well and interact with map on mouse hover, map nodes are well drawn centered, map performance improvements, added domain contrib module and configured domain for mobile display 6 лет назад
domain_alias.links.task.yml 57a9bcd721 entrees block is displaying well and interact with map on mouse hover, map nodes are well drawn centered, map performance improvements, added domain contrib module and configured domain for mobile display 6 лет назад
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domain_alias.services.yml 57a9bcd721 entrees block is displaying well and interact with map on mouse hover, map nodes are well drawn centered, map performance improvements, added domain contrib module and configured domain for mobile display 6 лет назад

README.md

About aliases

Aliases define unique domains or patterns that map to existing domain records. For example, you may want to have the following setup:

  • example.com (primary domain)
  • my.example.com (active domain record)
  • myexample.com (alias of the my.example.com record)

In effect, myexample.com and my.example.com behave the same way from a Drupal perspective. Aliases may also be made to redirect to their parent domain, if preferred.

Alias Patterns

The Drupal 8 version of Domain Alias supports multi-character wildcards as part of the hostname. You can register an alias to a domain record in any of the following patterns.

    *.example.com
    example.*.com
    example.com.*
    *.*.example.com
    example.*.*.com
    example.*
    example.*.*
    example.*.*.*
    *.com
    *.example.*
    example.com:8080
    example.com:*
    example.*:*
    *.com:*

A maximum of three wildcards are supported. At least one element must not be a wildcard. Ports may be wildcards as well, but are optional.

Alias Matching

When a request is sent to Drupal, the domain negotiation system will look for a matching record. The order of precedence is as follows.

Example request: one.example.com

  1. Exact domain record match (one.example.com)
  2. Exact alias match (one.example.com)
  3. Wildcard match

    one.example.com
    one.example.*
    *.example.com
    one.*.com
    *.example.*
    *.*.com
    one.*.*,
    

    Note that wildcard matching happens in the listed order. The number of wildcards is equal to the number of hostname parts minus 1. That is, you cannot register an alias that is all wildcards.

Port Matching

Port matching (e.g. example.com:8080) works exactly as hostname matching, with one significant change. If the inbound request is on port 80, matches to the base hostname are permitted, since port 80 is the default port for HTTP.

For example, a request to example.com:80 will match the following aliases:

    example.com:80
    example.com
    example.com:*
    example.*
    example.*:80
    example.*:*
    *.com
    *.com:80
    *.com:*

Whereas a request to example.com:8080 will not match the hostname without a port specified.

    example.com:8080
    example.com:*
    example.*:8080
    example.*:*
    *.com:8080
    *.com:*

Development Workflow

Aliases can be used to support development across different environments, with unique URLs. To support this feature, there is now an environment field for each alias. The default environment list is:

  • default
  • local
  • development
  • staging
  • testing

This list may be overridden by setting the domain_alias.environments configuration in settings.php.

The operation of these environments is as follows:

  • If alias matching the environment is default, no changes occur.
  • Else, matching aliases are loaded for all domains, so that links are rewritten to be specific to the specified environment. (See domain_alias_domain_load() for the logic.)

For instance, consider the following configuration. Your site's canonical domains are:

  • example.com
  • foo.example.com
  • bar.example.com

When developing locally, developers use .local instead of .com. These should be aliased to each domain as set as the local environment.

  • example.local > alias to example.com
  • foo.example.local > alias to foo.example.com
  • bar.example.local > alias to bar.example.com

When pushing changes to the cloud, we use a development server. These are tied to a specific cloud host (dev.mycloud.com). You can alias these to the development environment.

  • example.dev.mycloud.com > alias to example.com
  • foo.example.dev.mycloud.com > alias to foo.example.com
  • bar.example.dev.mycloud.com > alias to bar.example.com

The pattern can repeat for each of the environments listed above. The intended use of the default set of environments is:

  • default -- indicates a canonical URL. No changes will be made.
  • local -- for local development environments.
  • development -- for a development integration server (such as those provided by Acquia, Pantheon, and Platform.sh)
  • staging -- for a pre-deployment server (such as those provided by Acquia, Panthon, and Platform.sh)
  • testing -- for continuous integration services (such as TravisCI or CircleCI).

None of these environments are required. You may safely set all aliases to default if your workflow does not span multiple server environments.

How does it work?

This feature works by mapping each alias to an environment. If the active request matches an alias that is set as an environment other than default, then matching environment aliases are loaded for each domain. If a match is found, the hostname value for each domain is overwritten.

This overwrite affects the base path and request url that Domain module (and Domain Source) use for writing links.

Because the environments are specific to hostnames, this feature will only work if the site's cache recognizes url.site as a required cache context. Without that, the render system will cache the output of a request incorrectly.

Configuration

To use this feature, the following steps must be followed:

  • url.site must be added as a required_cache_context to your services.yml file.
  • Aliases must be mapped to a server environment. Default value is default.
  • All aliases should be listed as part of trusted_host_settings in settings.php.

Technical Notes

The matching follows an explicit sort order shown in DomainAliasSortTest.

The code will attempt to match domains of different lengths when doing wildcard matching in an environment. That is, an alias to example.* assigned to local should return example.local if the active domain is one.example.local, assigned to local.