Add method to get JSON responses (#129)

Add support for JSON API calls with new method callApiJSON.

Backgound:
The new method callApiJSON allows java client API users to request a JSON response. We now also can create/build JSON models (e.g. with/for GSON) further enhancing the APIs usability.

Signed-off-by: daivdwe <63723761+daivdwe@users.noreply.github.com>

Author: blue42-david

CHANGELOG.md

@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
+### Added
+- Add support for JSON API calls with new method `callApiJson`.
 
 ## [1.15.0] - 2025-01-20
 ### Added
@@ -233,4 +235,4 @@ of the alert (zaproxy/zaproxy#1341), older methods were deprecated.
 [1.2.0]: https://github.com/zaproxy/zap-api-java/compare/v1.1.1...v1.2.0
 [1.1.1]: https://github.com/zaproxy/zap-api-java/compare/v1.1.0...v1.1.1
 [1.1.0]: https://github.com/zaproxy/zap-api-java/compare/v1.0.0...v1.1.0
-[1.0.0]: https://github.com/zaproxy/zap-api-java/compare/6c778f77a817e1ff71e9279e4759535d482e8393...v1.0.0
+[1.0.0]: https://github.com/zaproxy/zap-api-java/compare/6c778f77a817e1ff71e9279e4759535d482e8393...v1.0.0

subprojects/zap-clientapi/src/main/java/org/zaproxy/clientapi/core/ClientApi.java

@@ -472,9 +472,27 @@ public byte[] callApiOther(
             String method,
             Map<String, String> params)
             throws ClientApiException {
+        return getBytes(requestMethod, "other", component, type, method, params);
+    }
+
+    public String callApiJson(
+            String component, String type, String method, Map<String, String> params)
+            throws ClientApiException {
+        byte[] json = getBytes(HttpRequest.GET_METHOD, "JSON", component, type, method, params);
+        return new String(json, StandardCharsets.UTF_8);
+    }
+
+    private byte[] getBytes(
+            String requestMethod,
+            String format,
+            String component,
+            String type,
+            String method,
+            Map<String, String> params)
+            throws ClientApiException {
         try {
             HttpRequest request =
-                    buildZapRequest(requestMethod, "other", component, type, method, params);
+                    buildZapRequest(requestMethod, format, component, type, method, params);
             if (debug) {
                 debugStream.println("Open URL: " + request.getRequestUri());
             }