REST API

AEM Screens提供了一个简单的RESTful API，它遵循 警报器 规范。 它允许导航内容结构并向环境中的设备发送命令。

API可在以下位置访问： http://localhost:4502/api/screens.json.

导航内容结构

API调用返回的JSON列出了与当前资源相关的实体。 在列出的自链接之后，这些实体中的每一个都可以再次作为REST资源访问。

例如，要访问演示旗舰位置中的显示，您可以调用：

GET /api/screens/content/screens/we-retail/locations/demo/flagship.json HTTP/1.1
Host: http://localhost:4502

或使用curl：

curl -u admin:admin http://localhost:4502/api/screens/content/screens/we-retail/locations/demo/flagship.json

结果将如下所示：

{
  "class": [
    "aem-io/screens/location"
  ],
  "links": [
    {
      "rel": [
        "self"
      ],
      "href": "http://localhost:4502/api/screens/content/screens/we-retail/locations/demo/flagship.json"
    },
    {
      "rel": [
        "parent"
      ],
      "href": "http://localhost:4502/api/screens/content/screens/we-retail/locations/demo.json"
    }
  ],
  "properties": {…},
  "entities": [
    {
      "class": [
        "aem-io/screens/display"
      ],
      "links": [
        {
          "rel": [
            "self"
          ],
          "href": "http://localhost:4502/api/screens/content/screens/we-retail/locations/demo/flagship/single.json"
        }
      ],
      "rel": [
        "child"
      ],
      "properties": {
        "title": "Single Screen Display",
        "height": 1440,
        "description": "Demo location of a single screen display.",
        "name": "single",
        "width": 2560,
        "idletimeout": 300,
        "layoutrows": 1,
        "layoutcols": 1
      }
    },
    …
  ]
}

然后，要访问单屏幕显示，您可以调用：

GET /api/screens/content/screens/we-retail/locations/demo/flagship/single.json HTTP/1.1
Host: http://localhost:4502

对资源执行操作

API调用返回的JSON可以包含资源上可用的操作列表。

例如，该显示区列出了 broadcast命令 允许向分配给该显示的所有设备发送命令的操作。

GET /api/screens/content/screens/we-retail/locations/demo/flagship/single.json HTTP/1.1
Host: http://localhost:4502

或使用curl：

curl -u admin:admin http://localhost:4502/api/screens/content/screens/we-retail/locations/demo/flagship/single.json

结果:

{
  "class": [
    "aem-io/screens/display"
  ],
  "links": […],
  "properties": {…},
  "entities": […],
  "actions": [
    {
      "title": "",
      "name": "broadcast-command",
      "method": "POST",
      "href": "/api/screens/content/screens/we-retail/locations/demo/flagship/single",
      "fields": [
        {
          "name": ":operation",
          "value": "broadcast-command",
          "type": "hidden"
        },
        {
          "name": "msg",
          "type": "text"
        }
      ]
    }
  ]
}

要触发此操作，需要调用：

POST /api/screens/content/screens/we-retail/locations/demo/flagship/single.json HTTP/1.1
Host: http://localhost:4502

:operation=broadcast-command&msg=reboot

或使用curl：

curl -u admin:admin -X POST -d ':operation=broadcast-command&msg=reboot' http://localhost:4502/api/screens/content/screens/we-retail/locations/demo/flagship/single.json