AEM - Get JSON response of an AEM Page

Creating a Default servlet with a selector to get Page JSON Response

For the demo, I created a 'hcms' Selector to get Page JSON Response, when the request is made using 'hcms' selector the node would be converted into json and json response would be returned, it is like OOTB 'model' selector but with extension

• Allow renaming properties
• filter results(exclude properties based on config)
• include reference response e.g. experience fragments

Uses

URL - http://host:port/resourcepath.hcms.json 

Examples :

http://localhost:4504/content/we-retail/language-masters/en/men.hcms.json

http://localhost:4504/content/experience-fragments/demoxf/demoxf.hcms.json

with tidy selector

http://localhost:4504/content/experience-fragments/demoxf/demoxf.hcms.tidy.json

OSGi Config

• exclude properties: list of properties to be excluded from JSON response
• include references: a list of properties that specify the reference of another resource.
• rename properties: list of property to rename if response, e.g. originalname=newname
• limit: to restrict look up if there is an infinite loop due to reference inclusion or the number of child nodes more than expected.

JSON Output

JSON output contains an array of node representations of JSON objects.
Each node object has the name, properties and childnodes items(properties).

The json object would not have properties or childnodes items if they are empty, That's means if the node doesn't contain any property(filtered) then there will be no properties item in json response and if there is no child node of a node then childnodes items will be not there in the response)

json representation of experience fragment :

{
  "name": "jcr:content",
  "properties": {
    "cq:tags": [],
    "jcr:title": "demoXF",
    "cq:xfVariantType": "web",
    "type": "weretail/components/structure/xfpage",
    "cq:template": "/conf/we-retail/settings/wcm/templates/experience-fragment-web-variation",
    "cq:xfMasterVariation": true
  },
  "childnodes": [
    {
      "name": "root",
      "properties": {
        "type": "wcm/foundation/components/responsivegrid"
      },
      "childnodes": [
        {
          "name": "product_grid",
          "properties": {
            "tagsMatch": "any",
            "pages": [
              "/content/we-retail/language-masters/en/products/men/shirts/eton-short-sleeve-shirt",
              "/content/we-retail/language-masters/en/products/men/pants/trail-model-pants",
              "/content/we-retail/language-masters/en/products/men/shorts/pipeline-board-shorts",
              "/content/we-retail/language-masters/en/products/men/shirts/amsterdam-short-sleeve-travel-shirt",
              "/content/we-retail/language-masters/en/products/men/shorts/buffalo-plaid-shorts",
              "/content/we-retail/language-masters/en/products/men/coats/portland-hooded-jacket"
            ],
            "feedEnabled": true,
            "displayAs": "products",
            "listFrom": "static",
            "limit": "6",
            "orderBy": "jcr:title",
            "type": "weretail/components/content/productgrid",
            "pageMax": "0"
          }
        },
        {
          "name": "image",
          "properties": {
            "isDecorative": "false",
            "altValueFromDAM": "true",
            "titleValueFromDAM": "true",
            "fileReference": "/content/dam/core-components-examples/library/sample-assets/mini.jpg",
            "displayPopupTitle": "true",
            "type": "weretail/components/content/image"
          }
        }
      ]
    }
  ]
}     

POM Gson dependency

<dependency>

<groupId>com.google.code.gson</groupId>

<artifactId>gson</artifactId>

<version>2.8.5</version>

</dependency>

Github code 

https://github.com/arunpatidar02/aem63app-repo/tree/master/java/page/json