Validating REST request format

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Glue API lets you validate requests sent to REST endpoints. It lets you check whether all required fields are present and whether the type and format of the fields are correct.

Install the RestRequestValidation module

To enable validation of REST requests, install the RestRequestValidation module by following Glue API: REST Schema Validation feature integration.

Use default validation schema

Spryker Glue API comes with a default validation schema. The schema provides default validation rules for the REST APIs shipped with Spryker. You can find it in vendor/spryker/spryker/Bundles/RestRequestValidator/config/validation.dist.yaml. Use the schema as a sample and reference for your own validation implementations.

By default, the schema is not applied.

Validate APIs

To apply validation rules to an API, follow these steps:

  1. Copy the default validation schema to the project level and to each API module that you want to be validated. For example, to provide validation for the StoresRestAPI module, copy the schema to src/Pyz/Glue/StoresRestAPI/Validation.

  2. Rename the file to the name of the API you are providing validation for.
    For StoresRestAPI, the name is STORES.validation.yaml.

  3. Specify validation for the endpoints provided by the API. Follow the format described in Validation rule format.

  4. Generate validation cache:

vendor/bin/console rest-api:build-request-validation-cache

By default, a validation cache is generated for the current store. To generate it for a specific store, use the APPLICATION_STORE variable. Example:

APPLICATION_STORE=AT vendor/bin/console rest-api:build-request-validation-cache
Verification

Make sure src/Pyz/Generated/Glue/Validator/validation.cache has been updated.

The API endpoints that you’ve provided validation rules for validate all incoming requests.

Validation rule format

The general format of validation YAML files is as follows:

endpoint_name1:
  method:
    field1:
      - Constraint1
      - Constraint2
      - ConstraintWithParameters:
          parameterName: '/\w*/'
    field2:
      - Constraint1

endpoint_name2:
  method:
    field1:
    - Constraint1

The validation rules are the same as those of the Symfony Validator component. For details, see Supported Constraints.

Deactivate validation of core-level fields

To deactivate validation of a field of an API shipped with Spryker, on a project or store level, override the field without any constraints.

For example, if an API is validated on the core level as follows:

access-tokens:
  post:
    username:
      - NotBlank
      - Email
      - Regex:
          pattern: '/\w*/'

refresh-tokens:
  post:
    refresh_token:
    - Required

To remove the validation of the username field, override the field on the project or store level as follows:

access-tokens:
  post:
    username:

refresh-tokens:
  post:
    refresh_token:
    - Required

Make fields optional

By default, all the request fields are required. To make a field optional, write the schema as follows:

refresh-tokens:
  post:
    refresh_token:
    - Optional:
        constraints:
        - NotBlank

Validation cache

All validation rules in Spryker Glue API are cached.

To apply new or updated rules, rebuild the validation cache:

vendor/bin/console rest-api:build-request-validation-cache

By default, a validation cache is generated for the current store. To generate it for a specific store, use the APPLICATION_STORE variable. Example:

APPLICATION_STORE=AT vendor/bin/console rest-api:build-request-validation-cache

For validation, you can use a Spryk:

console spryk:run AddGlueValidation --mode=project --module=ResourcesRestApi --organization=Pyz --resourceType=resources

This command places the default validation.yaml file into the specified module. You need to add attributes manually.