fix: inputs json format and add timeout settings

src/main/java/ai/dify/javaclient/ChatClient.java

@@ -60,8 +60,9 @@ private String generateQueryParams(Map<String, String> params) {
      */
     public Response createChatMessage(String inputs, String query, String user, boolean stream, String conversation_id) throws DifyClientException {
         JSONObject json = new JSONObject();
-        json.put("inputs", inputs);
-        json.put("query", query);
+        JSONObject inputsJson = new JSONObject();
+        inputsJson.put("query", query);
+        json.put("inputs", inputsJson);
         json.put("user", user);
         json.put("response_mode", stream ? "streaming" : "blocking");
         if (conversation_id != null && !conversation_id.isEmpty()) {

src/main/java/ai/dify/javaclient/CompletionClient.java

@@ -38,8 +38,9 @@ public CompletionClient(String apiKey, String baseUrl) {
      */
     public Response createCompletionMessage(String inputs, String query, String user, boolean stream) throws DifyClientException {
         JSONObject json = new JSONObject();
-        json.put("inputs", inputs);
-        json.put("query", query);
+        JSONObject inputsJson = new JSONObject();
+        inputsJson.put("query", query);
+        json.put("inputs", inputsJson);
         json.put("user", user);
         json.put("response_mode", stream ? "streaming" : "blocking");
 

src/main/java/ai/dify/javaclient/DifyClient.java

@@ -6,6 +6,8 @@
 import okhttp3.*;
 
 import java.io.IOException;
+import java.util.concurrent.TimeUnit;
+
 /**
  * This class serves as a client for interacting with the Dify API.
  * It provides methods for sending various types of requests to the API.
@@ -38,13 +40,29 @@ public DifyClient(String apiKey) {
     /**
      * Constructs a new DifyClient with the provided API key and base URL.
      *
-     * @param apiKey   The API key to use for authentication.
-     * @param baseUrl  The base URL of the Dify API.
+     * @param apiKey  The API key to use for authentication.
+     * @param baseUrl The base URL of the Dify API.
      */
     public DifyClient(String apiKey, String baseUrl) {
+        this(apiKey, baseUrl, 1L, TimeUnit.HOURS);
+    }
+
+    /**
+     * Constructs a new DifyClient with the provided API key and base URL.
+     *
+     * @param apiKey  The API key to use for authentication.
+     * @param baseUrl The base URL of the Dify API.
+     * @param timeout The timeout number
+     * @param timeOutUnit The timeout unit
+     */
+    public DifyClient(String apiKey, String baseUrl, Long timeout, TimeUnit timeOutUnit) {
         this.apiKey = apiKey;
         this.baseUrl = baseUrl;
-        this.client = new OkHttpClient();
+        OkHttpClient.Builder builder = new OkHttpClient.Builder();
+        this.client = builder.connectTimeout(timeout, timeOutUnit)
+                .readTimeout(timeout, timeOutUnit)
+                .writeTimeout(timeout, timeOutUnit)
+                .build();
     }
 
     /**