REST API

AEM Screens提供了一个遵循Siren规范的简单RESTful API。 它允许导航内容结构并向环境中的设备发送命令。

该API可在​http://localhost:4502/api/screens.json中访问。

导览内容结构

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，这些实体中的每个实体都可再次作为REST资源进行访问。

例如，要访问演示旗舰位置中的显示屏，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

结果会如下所示：

{
  "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，该显示器列出了​broadcast-command​操作，该操作允许向分配给该显示器的所有设备发送命令。

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