UI API Documentation

There are several ways to communicate with the qaul.net daemon. They all have the same functionality and communicate via JSON over http. If you want to create an UI client for qaul.net this guide documents how to interact with the daemon.

JSON-RPC API

The JSON-RPC API uses a single http endpoint for the communication with qaul daemon. It is our main API for UI's.

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HTTP-API

The HTTP-API is the main entry point for the Web-GUI. It uses the http protocol for the communcation and communicates with the EmberJS REST module in the qaul.net WebGUI.

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JSON-RPC API

The JSON-RPC API consists of a single http endpoint. Over which all RPC interaction with the qaul.net daemon happens.

General Concept

The JSON-RPC API's prefix is /rpc. All requests are sent as POST requests to this endpoint and will return with http response code 200.

Request

The general JSON-RPC JSON structure looks like this:

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "field_name": "FIELD_VALUE",
        "field_name": "FIELD_VALUE"
    },
    "auth": {
        "id": "USER_ID",
        "token": "SESSION_TOKEN"
    }
}

The method name can have one of those values:

• create: When you're creating a new entry.
• get: To request one entry by ID.
• modify: To modify an entry.
• delete: To delete one entry by ID.
• list: To receive a list of queried entries.

There are some special authentication methods:

• login: to start an authenticated session
• logout: to terminate an authenticated session
• validate: to validate a session token

Request Data Payload

In order to create or modify an entry we send a JSON payload with the request.

To create an entry we send POST a request with the content of some of the fields. Please be aware, that some fields are mandatory and that not all the fields can be set during the creation of an entry. To find out about the specific use please check the documentation of the model.

Create entry payload example:

{
    "field_name": "FIELD_VALUE"
}

To modify and entry we send a PATCH request with only the modified fields in a specific structure. A set structure to set or modify a field, and an unset structure to delete the content of a field.

Modify entry payload example:

{
    "field_name": { "set": "FIELD_VALUE" },
    "field_name": "unset"
}

Response

The general response payload structure looks like this:

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "field_name": "FIELD_VALUE"
    }
}

The "data" field has several specific structures that are documented in the following.

Response Data Payload per Action

The response payloads are model specific and should be checked in the model documentations. however there are some general rules how a payload looks.

When you're requesting a list of entries, you're receiving the following structure:

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "model_name": [
            {
                "id": "ITEM_ID",
                "field_name": "FIELD_CONTENT"
            },
            {
                "id": "ITEM_ID",
                "field_name": "FIELD_CONTENT"
            }
        ]
    }
}

When you get one specific entry by it's ID, or when you create or modify an entry you're receiving the following structure:

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "model_name": {
            "id": "ITEM_ID",
            "field_name": "FIELD_CONTENT"
        }
    }
}

Sometimes you're only receiving a success message as data payload.

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "type": "success"
    }
}

Error Response Data Payload

On error you're receiving an error message as data payload.

{
    "id": "RANDOM_REQUEST_ID",
    "kind": "MODEL_NAME",
    "method": "METHOD_NAME",
    "data": {
        "error": "ERROR_MESSAGE"
    }
}

Test JSON RPC API

There are shell scripts over which you can test all the functions of the JSON RPC API.

The bash test scripts are located in the folder tests/json-rpc of the qaul.net repository.

How to execute and use the test scripts is documented in the README.md file in the test script folder.

HTTP API

The HTTP API uses specific http URLs, http request codes and http response codes for each function. It is the API used by the webGUI.

General Concept

The HTTP API's prefix is /http.

Model names and field id's use snake case in singular.

Request

URL Concept

The general URL concept looks like this: /http/model_name/ID?QUERY_STRING

To list all entries: GET /http/model_name

To query the entries: GET /http/model_name?QUERY_STRING

To create a new entry: POST /http/model_name

To get a single entry: GET /http/model_name/ID

To modify an entry: PATCH /http/model_name/ID

To delete an entry: DELETE /http/model_name/ID

Authentication

The Authentication Token is sent in the Authorization field of the http request header.

Authorization:{"id":"USER_ID","token":"SESSION_TOKEN"}

Payload

In order to create or modify an entry we send a JSON payload with the request.

To create an entry we send POST a request with the content of some of the fields. Please be aware, that some fields are mandatory and that not all the fields can be set during the creation of an entry. To find out about the specific use please check the documentation of the model.

Create entry payload example:

{
    "field_name": "FIELD_VALUE"
}

To modify and entry we send a PATCH request with only the modified fields in a specific structure. A set structure to set or modify a field, and an unset structure to delete the content of a field.

Modify entry payload example:

{
    "field_name": { "set": "FIELD_VALUE" },
    "field_name": "unset"
}

Response

HTTP Response Codes

HTTP response codes on success:

• 200 (OK): default response code, when everything went well and you're receiving a payload.
• 204 (No Content): response when there is no payload, which you get on delete and sometimes on modify too.

HTTP response codes on error:

• 400 (Bad Request): wrong user input (and any other unhandled error)
• 401 (Unauthorized): if the user is not authorized to perform this task. This either means that you're authorization token is invalid or that you're trying to access some other users data.
• 500 (Internal Server Error): The server was not able to parse the request payload.

Response Payload per Action

The response payloads are model specific and should be checked in the model documentations. however there are some general rules how a payload looks.

When you're receiving a list of entries, you're receiving the following structure:

{
    "model_name": [
        {
            "id": "ITEM_ID",
            "field_name": "FIELD_CONTENT"
        },
        {
            "id": "ITEM_ID",
            "field_name": "FIELD_CONTENT"
        }
    ]
}

When you get one specific entry by it's ID, or when you create a new entry you're receiving the following structure:

{
    "model_name": {
        "id": "ITEM_ID",
        "field_name": "FIELD_CONTENT"
    }
}

Error Response Payload

On error you're receiving an error message as payload.

{
    "error": "ERROR_MESSAGE"
}

Authentication HTTP-API Interface

Each client needs to authenticate a session in order to be able to interact with the qaul.net daemon and send the session authentication in the http Authorization header.

Http Authorization Header

The session authentication needs to be sent Authorization field of the http request header.

Authorization:{"id":"USER_ID","token":"SESSION_TOKEN"}

Unauthenticated Functions

There are a few HTTP-API calls can be made without sending a session authorization. This is the list of the calls. If a session authorization header is sent, it will be ignored.

• GET /http/user: get a list of all users on this node.
• POST /http/user: create a new user.
• GET /http/user/ID: get the information of a specific user by it's ID.
• POST /http/auth: create a new authenticated session.

Login

In order to create an authentication session, the user needs to login.

Login request:

POST /http/auth

{
    "id": "USER_ID",
    "pw": "PASSWORD"
}

Login response payload:

{
    "auth": {
        "id": "USER_ID",
        "token": "AUTHENTICATION_TOKEN"
    }
}

Logout

To end and logout of an authenticated session you must send the following request:

DELETE /http/auth

On success it returns with http code 204.

Check whether a Session Authentication Token is still Valid

To check whether an authenticated session is still valid, you can send the following request:

GET /http/auth

It returns http code 204 on success and 401 on failure.

User HTTP-API Interface

The user api reflects all user accounts in the system. All information except password is available to other users.

User Model

{
    "user": {
        "avatar": null,
        "bio": {
            "key":"VALUE"
        },
        "display_name": null,
        "id": "USER_ID",
        "real_name": null,
        "services": []
    }
}

Create User

To create a user, one must only send a password.

POST /http/user

Request payload:

{
    "pw":"PASSWORD"
}

Response payload: user model

{
    "user": {
        "avatar": null,
        "bio": {},
        "display_name": null,
        "id": "USER_ID",
        "real_name": null,
        "services": []
    }
}

Modify User

POST /http/user/USER_ID

Request payload: Only the changed fields are sent in the diff format.

{
    "display_name": {
        "set": "testuser"
    },
    "real_name": {
        "set": "My Real Name"
    }
}

Response: same as create user

Get Information of a Specific User

POST /http/user/USER_ID

Response: same as create user

Delete a User

DELETE /http/user/USER_ID

Request payload: There needs to be sent the field "purge", which can be set to the string values "true" or "false". If the value is "true", all data of the user is deleted from the node.

{
    "purge": "true"
}

Response: empty response with http code 204

Query Users

Get an array of all users

GET /http/user

Response payload: array of users

{
    "user": [
        {
            "avatar": null,
            "bio": {},
            "display_name": "nameofuser1",
            "id": "USER_ID",
            "real_name": "Real Name",
            "services": []
        },
        {
            "avatar": null,
            "bio": {},
            "display_name": null,
            "id": "USER_ID",
            "real_name": null,
            "services": []
        }
    ]
}

Chat Service HTTP-API Interface

The chat service consists of two models, the chat_room and the chat_message. First there needs to be created a chat_room with as many participants as desired. Afterwards one can send a chat_message to a chat_room.

Chat Models

Chat room model

{
    "chat_room": {
        "create_time": "2020-06-22T13:19:41.143402587Z",
        "id": "CHAT_ROOM_ID",
        "name": "CHAT ROOM NAME",
        "users": [
            "USER_ID",
            "USER_ID"
        ]
    }
}

Chat message model

{
    "chat_message": [
        {
            "content": "TEXT_MESSAGE",
            "id": "CHAT_MESSAGE_ID",
            "room": {
                "Id": "CHAT_ROOM_ID"
            },
            "sender": "USER_ID",
            "timestamp": "2020-06-22T13:26:37.478641925Z"
        }
    ]
}

Chat Room

Create Chat Room

To create a chat room one can send an array of user id's and an optional chat room name.

POST /http/chat_room

Request payload:

{
    "name": "CHAT ROOM NAME",
    "users": [
        "USER_ID",
        "USER_ID"
    ]
}

Response payload:

{
    "chat_room":{
        "id":"CHAT_ROOM_ID",
        "users":[
            "USER_ID",
            "USER_ID",
            "SENDER_USER_ID"
        ],
        "name":"CHAT ROOM NAME",
        "create_time":"2020-06-22T14:21:24.311261408Z"
    }
}

Modify Chat Room

Change

PATCH /http/chat_room/CHAT_ROOM_ID

Request payload: Only the changed fields are sent in the diff format.

{
    "id": "CHAT_ROOM_ID",
    "set": {
        "name": "My Room Name"
    }
}

Response payload: same as create chat room.

Get Chat Room

Retrieve the information of a specific chat room by it's id.

GET /http/chat_room/CHAT_ROOM_ID

Response payload: same as create chat room.

List all Chat Rooms

GET /http/chat_room

Response payload: Array of chat rooms

{
    "chat_rooms": [
        "ARRAY_OF_CHAT_ROOM_OBJECTS"
    ]
}

Chat Message

Create a Chat Message

POST /http/chat_message

Request payload:

{
    "room": "CHAT_ROOM_ID",
    "text": "MESSAGE_TEXT"
}

Response payload: returns created chat message

{
    "chat_message": [
        {
            "content": "MESSAGE_TEXT",
            "id": "CHAT_MESSAGE_ID",
            "room": {
                "Id": "CHAT_ROOM_ID"
            },
            "sender": "USER_ID",
            "timestamp": "2020-06-22T16:46:03.317992177Z"
        }
    ]
}

List all Chat Messages of a Specific Chat Room

GET /http/chat_message?chat_room=CHAT_ROOM_ID

Response payload: Array of chat messages

{
    "chat_message": [
        "ARRAY_OF_CHAT_MESSAGE_OBJECTS"
    ]
}

Test The HTTP API

There are shell scripts over which you can test all the functions of the HTTP API.

The bash test scripts are located in the folder tests/http-api of the qaul.net repository.

How to execute and use the test scripts is documented in the README.md file in the test script folder.