AIController.cs

using System.Collections.Generic;
using System.IO;
using Newtonsoft.Json;
using TMPro;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
// using Newtonsoft.Json;

namespace TextGenerator.AITextGeneratorDemo
{
    public class AIController : MonoBehaviour
    {
        public TMP_InputField input;
        public TMP_InputField secret;
        public Button submitButton;
        public TMP_Text output;

        void Start()
        {
            submitButton.onClick.AddListener(SubmitForm);
        }

        public void SubmitForm()
        {
            string textInput = input.text;
            string secretInput = secret.text;
            string generatedText = RequestTextGeneration(textInput, secretInput);
            output.text = generatedText;
        }

        private string RequestTextGeneration(string textInput, string secretInput)
        {
            Debug.Log("Form submitted");
            string url = "https://api.text-generator.io/api/v1/generate";
            // post json

            Dictionary<string, string> json = new Dictionary<string, string>();
            json.Add("text", textInput);
            json.Add("number_of_results", "1");
            json.Add("max_length", "100");
            json.Add("max_sentences", "4");
            json.Add("min_probability", "0");
            json.Add("top_p", "0.9");
            json.Add("top_k", "40");
            json.Add("temperature", "0.7");
            json.Add("repetition_penalty", "1.17");
            json.Add("seed", "0");

            UnityWebRequest www = Post(url, json);
            www.SetRequestHeader("secret", secretInput);
            www.SendWebRequest();
            while (!www.isDone)
            {
                // Debug.Log("Waiting for response");
            }

            if (www.result is UnityWebRequest.Result.ConnectionError or UnityWebRequest.Result.ProtocolError)
            {
                Debug.Log(www.error);
                Debug.Log(www.downloadHandler.text);
            }
            else
            {
                // Show results as text
                Debug.Log(www.downloadHandler.text);
                // get json response
                string jsonText = www.downloadHandler.text;
                // parse json to list of JSONTextGeneratorResponse objects
                JsonReader jr = new JsonTextReader(new StringReader(jsonText));
                JsonSerializer serializer = new JsonSerializer();
                List<JSONTextGeneratorResponseItem> response =
                    serializer.Deserialize<List<JSONTextGeneratorResponseItem>>(jr);
                // get generated text 
                return response[0].generated_text;
            }

            return "";
        }

        public string DictToJSON(Dictionary<string, string> dict)
        {
            string json = "{";
            foreach (KeyValuePair<string, string> entry in dict)
            {
                string value = entry.Value.Replace("\u000b", "\\n").Replace(@"
", "\\n");

                json += "\"" + entry.Key + "\":\"" + value + "\",";
            }

            json = json.Substring(0, json.Length - 1);
            json += "}";
            return json;
        }

        public UnityWebRequest Post(string url, Dictionary<string, string> form)
        {
            UnityWebRequest www = new UnityWebRequest(url, "POST");
            www.downloadHandler = new DownloadHandlerBuffer();
            string json = DictToJSON(form);
            Debug.Log(json);
            www.uploadHandler = new UploadHandlerRaw(System.Text.Encoding.UTF8.GetBytes(json));

            www.SetRequestHeader("Content-Type", "application/json");
            www.SetRequestHeader("Accept", "application/json");
            return www;
        }
    }

    class JSONTextGeneratorResponseItem
    {
        public string generated_text;
        public string stop_reason;
    }
}