An app for developers who need to reformat or filter data structures saved in JSON format and compare structures with each other. JSON-tools allows you to minify an unminified JSON representation as well as the reverse operation (adding any spaces and newlines). The application will be available through a GUI as well as a remote API.

The code-level documentation is available at https://kxpi.github.io/JSON-tools/javadoc/. Moreover, an UML diagram can be found in the repository root.

The application listens at port 8080. It exposes single endpoint, namely /json, that accepts two parameters (action and format) and expects the JSON string to be passed as the request body.

format can be one of following: minified, pretty. These values are pretty self-explanatory and do exactly what one can expect.

action is a string built as follows: action1:param1,param2,param3;action2:param1. It can consist of numerous action designators separated with semicolon (;). Furthermore, each designator has to specify the action name followed by optional parameters list. Parameters are separated with commas (,). The parameter list can be totally ommited, in which case the colon (:) after the action name is not necessary.

At the moment there are two actions implemented remove and keep. They both aim to filter the properties present in the top-level object. remove accepts a list of keys that are to be deleted from the object (keeping everything else) whereas keep keeps only the specified keys and removes the rest.

GET /json?action=keep:a,b&format=pretty HTTP/1.1
Content-Type: application/json
Content-Length: 33

{"a":1,"b":"xyz","c":[],"d":null}

It will return an output like the following:

{
  "a": 1,
  "b": "xyz"
}