api

Last updated: 2024-09-17 21:08:41.750666 File source: link on GitLab

api

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Specification

Description

The api package contains all API functionality of Device Management Service (DMS). DMS exposes various endpoints through which its different functionalities can be accessed.

Structure and Organisation

Here is quick overview of the contents of this directory:

• README: Current file which is aimed towards developers who wish to use and modify the api functionality.

• api.go: This file contains router setup using Gin framework. It also applies Cross-Origin Resource Sharing (CORS) middleware and OpenTelemetry middleware for tracing. Further it lists down the endpoint URLs and the associated handler functions.

• actor.go: Contains endpoints for actor interaction.

Functionality

Configuration

The REST server by default binds to 127.0.0.1 on port 9999. The configuration file dms_config.json can be used to change to a different address and port.

The parameters rest.port and rest.addr define the port and the address respectively.

You can use the following format to construct the URL for accessing API endpoints

http://localhost:<port>/api/v1/<endpoint>

Currently, all endpoints are under the /actor path

/actor/handle

Retrieve actor handle with ID, DID, and inbox address

Item	Value
endpoint:	/actor/handle
method:	HTTP GET
output:	Actor Handle

Response:

{
    "id": <actor_id>,
    "did" : <actor_did>,
    "addr" : <inbox_address>
}

/actor/send

Send a message to actor

Item	Value
endpoint:	/actor/handle
method:	HTTP POST
output:	{"message": "message sent"}

The request should be an enveloped message

{
    "to": {
        "id": <actor_id>,
        "did" : <actor_did>,
        "addr" : <inbox_address>
    },
    "be": <behavior>,
    "from": {
        "id": <actor_id>,
        "did" : <actor_did>,
        "addr" : <inbox_address>
    },
    "nonce": <nonce>,
    "opt": {
        "cont": <topic_to_publish_to>,
        "exp": <time_to_expire>
    },
    "msg": <message>,
    "cap": <capability>,
    "sig": <signature>
}

/actor/invoke

Invoke actor with message

Item	Value
endpoint:	/actor/invoke
method:	HTTP POST
output:	Enveloped Response or if error {"error": "<error message>"}

The request should be an enveloped message

{
    "to": {
        "id": <actor_id>,
        "did" : <actor_did>,
        "addr" : <inbox_address>
    },
    "be": <behavior>,
    "from": {
        "id": <actor_id>,
        "did" : <actor_did>,
        "addr" : <inbox_address>
    },
    "nonce": <nonce>,
    "opt": {
        "cont": <topic_to_publish_to>,     // needs to be specified for invoke
        "exp": <time_to_expire>
    },
    "msg": <message>,
    "cap": <capability>,
    "sig": <signature>
}

/actor/broadcast

Broadcast message to actors

Item	Value
endpoint:	/actor/broadcast
method:	HTTP POST
output:	Enveloped Response or if error {"error": "<error message>"}

The request should be an enveloped message

{
    "to": {},                                 // should be empty for broadcast
    "be": <behavior>,
    "from": {
        "id": <actor_id>,
        "did" : <actor_did>,
        "addr" : <inbox_address>
    },
    "nonce": <nonce>,
    "opt": {
        "topic": <topic_to_publish_to>,
        "exp": <time_to_expire>
    },
    "msg": <message>,
    "cap": <capability>,
    "sig": <signature>
}

For more details on these Actor API endpoints, refer to the cmd/actor package on how the they are used.