How to ceate node with JSON in AEM through servlet?

Question

I have created a servlet with method post. Then, i used postman to request it with the JSON file in body. Now i want to create node with JSON that i retrieved from servlet. How can i do that? I know how to create node and setProperties but only String. I want to create node and setProperties with the JSON file like that

[
  {
    "_id": "5fc9dadaca52c28bb40011ee",
    "index": 0,
    "tags": [
      "laboris",
      "minim",
     ]
   },
   {
    "_id": "5fc9dada30930ef9d77c6d91",
    "index": 1,
    "tags": [
      "duis",
      "est",
     ]
   },
]

Please help me!

Answer 1

The Sling Post Servlet is what you're looking for. The import operation specifically:

https://sling.apache.org/documentation/bundles/manipulating-content-the-slingpostservlet-servlets-post.html#importing-content-structures-1

However, you need your JSON structure to be value pairs in the case of objects. Here's an example based on your sample json:

{
    "node": "parent",
    "childs": {
        "child1": {
            "_id": "5fc9dadaca52c28bb40011ee",
            "index": 0,
            "tags": [
                "laboris",
                "minim"
            ]
        },
        "child2": {
            "_id": "5fc9dada30930ef9d77c6d91",
            "index": 1,
            "tags": [
                "duis",
                "est"
            ]
        }
    }
}

From the Front End

Here's an example calling the sling post servlet with a json file. You can follow the same pattern in JS but specifying :content instead of :contentFile

curl http://localhost:4502/content/newTree \
  -u admin:admin \
  -F":operation=import" \
  -F":contentType=json" \
  -F":replace=true" \
  -F":replaceProperties=true" \
   -F":contentFile=@my-json-file.json"

From the Back End

You can also create a POST request from the back end:

@Component(
    service = Servlet.class,
    property = {
        ServletResolverConstants.SLING_SERVLET_METHODS + "=" + HttpConstants.METHOD_GET,
        ServletResolverConstants.SLING_SERVLET_PATHS + "=" + "/bin/services/test"
    })
public class Test extends SlingSafeMethodsServlet {

    @Reference
    private SlingRequestProcessor requestProcessor;

    @Reference
    private RequestResponseFactory requestResponseFactory;

    @Override
    protected void doGet(final SlingHttpServletRequest request, final SlingHttpServletResponse response) throws IOException {
        final ByteArrayOutputStream output = new ByteArrayOutputStream();
        final Map<String, Object> parameters = ImmutableMap.of(
            ":operation", "import",
            ":contentType", "json",
            ":replaceProperties", "true",
            ":replace", "true",
            ":content", json
        );
        final HttpServletRequest postRequest = requestResponseFactory
            .createRequest(HttpConstants.METHOD_POST, "/content/newTree", parameters);
        final HttpServletResponse postResponse = requestResponseFactory.createResponse(output);

        try {
            requestProcessor.processRequest(postRequest, postResponse, request.getResourceResolver());
        } catch (ServletException e) {
            // handle exception
        }
    }
}