Serving Plain Text

Instead of using the Environment abstraction (or one of the alternative representations of it in YAML or properties format), your applications might need generic plain-text configuration files that are tailored to their environment. The Config Server provides these through an additional endpoint at /{application}/{profile}/{label}/{path}, where application, profile, and label have the same meaning as the regular environment endpoint, but path is a path to a file name (such as log.xml). The source files for this endpoint are located in the same way as for the environment endpoints. The same search path is used for properties and YAML files. However, instead of aggregating all matching resources, only the first one to match is returned.spring-doc.cn

After a resource is located, placeholders in the normal format (${…​}) are resolved by using the effective Environment for the supplied application name, profile, and label. In this way, the resource endpoint is tightly integrated with the environment endpoints.spring-doc.cn

As with the source files for environment configuration, the profile is used to resolve the file name. So, if you want a profile-specific file, /*/development/*/logback.xml can be resolved by a file called logback-development.xml (in preference to logback.xml).
If you do not want to supply the label and let the server use the default label, you can supply a useDefaultLabel request parameter. Consequently, the preceding example for the default profile could be /sample/default/nginx.conf?useDefaultLabel.

At present, Spring Cloud Config can serve plaintext for git, SVN, native backends, and AWS S3. The support for git, SVN, and native backends is identical. AWS S3 works a bit differently. The following sections show how each one works:spring-doc.cn

Git, SVN, and Native Backends

Consider the following example for a GIT or SVN repository or a native backend:spring-doc.cn

application.yml
nginx.conf

The nginx.conf might resemble the following listing:spring-doc.cn

server {
    listen              80;
    server_name         ${nginx.server.name};
}

application.yml might resemble the following listing:spring-doc.cn

nginx:
  server:
    name: example.com
---
spring:
  profiles: development
nginx:
  server:
    name: develop.com

The /sample/default/master/nginx.conf resource might be as follows:spring-doc.cn

server {
    listen              80;
    server_name         example.com;
}

/sample/development/master/nginx.conf might be as follows:spring-doc.cn

server {
    listen              80;
    server_name         develop.com;
}

AWS S3

To enable serving plain text for AWS s3, the Config Server application needs to include a dependency on Spring Cloud AWS. For details on how to set up that dependency, see the Spring Cloud AWS Reference Guide. Then you need to configure Spring Cloud AWS, as described in the Spring Cloud AWS Reference Guide.spring-doc.cn

Decrypting Plain Text

By default, encrypted values in plain text files are not decrypted. In order to enable decryption for plain text files, set spring.cloud.config.server.encrypt.enabled=true and spring.cloud.config.server.encrypt.plainTextEncrypt=true in bootstrap.[yml|properties]spring-doc.cn

Decrypting plain text files is only supported for YAML, JSON, and properties file extensions.

If this feature is enabled, and an unsupported file extention is requested, any encrypted values in the file will not be decrypted.spring-doc.cn