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Authentication

Calling an API can be authenticated using tokens.

Token-based Authentication

A token specifies temporary permissions in a computer system. During API authentication using a token, the token is added to request headers to get permissions for calling the API.

The validity period of a token is 24 hours. When using a token for authentication, cache it to prevent frequently calling the IAM API used to obtain a user token.

When calling the API to obtain a user token, you must set auth.scope in the request body to project.

{ 
    "auth": { 
        "identity": { 
            "methods": [ 
                "password" 
            ], 
            "password": { 
                "user": { 
                    "name": "user_name", 
                    "password": "********", 
                    "domain": { 
                        "name": "domainname" 
                    } 
                } 
            } 
        }, 
        "scope": { 
            "project": { 
                "name": "xxxxxxxx" 
            } 
        } 
    } 
}

After a token is obtained, the X-Auth-Token header field must be added to requests to specify the token when calling other APIs. For example, if the token is ABCDEFJ...., X-Auth-Token: ABCDEFJ.... can be added to a request as follows.

GET https://iam.cn-north-4.myhuaweicloud.com/v3/auth/projects  
Content-type: application/json 
X-Auth-Token: ABCDEFJ....

You can also learn how to use token-based authentication by watching the video tutorial.

Parent topic: Calling APIs