Help Center> API Gateway> API Reference (ME-Abu Dhabi Region)> Dedicated Gateway APIs (V2)> Environment Variable Management> Creating a Variable
Updated on 2023-05-09 GMT+08:00
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Creating a Variable

Function

Publishing an API in different environments may involve various variables, such as API service deployment address and request version.

You can define environment variables when creating an API. When the API is called, the environment variables will be replaced with the variable values to distinguish environments.

Environment variables are defined for an API group and apply to all APIs in the group.

  1. Environment variable names must be unique for an API group in the same environment.

  2. Environment variable names are case-sensitive. For example, ABC and abc are two different variables.

  3. APIs that use environment variables cannot be debugged.

  4. You must enclose an environment variable in number signs (#) so that it can be replaced with the actual value of the environment in which the API is published. For example, if the URL of an API is https://#address#:8080 and the value of variable address is 192.168.1.5 in the RELEASE environment, the real URL of the API is https://192.168.1.5:8080 after publishing.

URI

POST /v2/{project_id}/apigw/instances/{instance_id}/env-variables

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID. For details about how to obtain a project ID, see "Appendix" > "Obtaining a Project ID" in this document.

instance_id

Yes

String

Gateway ID, which can be obtained from the gateway information on the APIG console.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

Yes

String

User token. It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is a token.
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

variable_value

Yes

String

The variable value can contain 1 to 255 characters. Only letters, digits, and special characters (_-/.:) are allowed.

env_id

Yes

String

Environment ID.

Minimum: 1

Maximum: 65

group_id

Yes

String

API group ID.

Minimum: 1

Maximum: 65

variable_name

Yes

String

Variable name, which can contain 3 to 32 characters, starting with a letter. Only letters, digits, hyphens (-), and underscores (_) are allowed. The variable name is equivalent to "#Name#" in API definitions. Characters between the number signs are case-sensitive. The variable name will be replaced with the variable value after API publication.

Response Parameters

Status code: 201

Table 4 Response body parameters

Parameter

Type

Description

variable_value

String

The variable value can contain 1 to 255 characters. Only letters, digits, and special characters (_-/.:) are allowed.

env_id

String

Environment ID.

Minimum: 1

Maximum: 65

group_id

String

API group ID.

Minimum: 1

Maximum: 65

variable_name

String

Variable name, which can contain 3 to 32 characters, starting with a letter. Only letters, digits, hyphens (-), and underscores (_) are allowed. The variable name is equivalent to "#Name#" in API definitions. Characters between the number signs are case-sensitive. The variable name will be replaced with the variable value after API publication.

id

String

Environment variable ID.

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Status code: 401

Table 6 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Status code: 403

Table 7 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Status code: 404

Table 8 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Status code: 500

Table 9 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error message.

Example Requests

{
  "variable_name" : "address",
  "variable_value" : "192.168.1.5",
  "env_id" : "7a1ad0c350844ee69479b47df9a881cb",
  "group_id" : "c77f5e81d9cb4424bf704ef2b0ac7600"
}

Example Responses

Status code: 201

Created

{
  "variable_value" : "192.168.1.5",
  "env_id" : "7a1ad0c350844ee69479b47df9a881cb",
  "group_id" : "c77f5e81d9cb4424bf704ef2b0ac7600",
  "id" : "25054838a624400bbf2267cf5b3a3f70",
  "variable_name" : "address"
}

Status code: 400

Bad Request

{
  "error_code" : "APIG.2012",
  "error_msg" : "Invalid parameter value,parameterName:instance_id. Please refer to the support documentation"
}

Status code: 401

Unauthorized

{
  "error_code" : "APIG.1002",
  "error_msg" : "Incorrect token or token resolution failed"
}

Status code: 403

Forbidden

{
  "error_code" : "APIG.1005",
  "error_msg" : "No permissions to request this method"
}

Status code: 404

Not Found

{
  "error_code" : "APIG.3003",
  "error_msg" : "The instance does not exist;id:f0fa1789-3b76-433b-a787-9892951c620ec"
}

Status code: 500

Internal Server Error

{
  "error_code" : "APIG.9999",
  "error_msg" : "System error"
}

Status Codes

Status Code

Description

201

Created

400

Bad Request

401

Unauthorized

403

Forbidden

404

Not Found

500

Internal Server Error

Error Codes

See Error Codes.