JSON REST Client for Unity 3D

JsonRestClient

using UnityEngine;
using System.Collections;
using UnityEngine.Networking;


public class JsonRestClient : MonoBehaviour {

	private T fromJSON<T>(string json){
		return JsonUtility.FromJson<T> (json);
	}

	private string toJSON<T>(T model){
		return JsonUtility.ToJson(model);
	}

	public void Get<J> (string url, string successCallback, string errorCallback){
		this.request<Object, J> (url, "GET", null, successCallback, errorCallback);
	}

	public void Post<T, J>(string url, T payload, string successCallback, string errorCallback){
		this.request<T,J>(url, "POST", payload, successCallback, errorCallback);
	}

	public void Post<J>(string url, string successCallback, string errorCallback){
		this.request<Object,J>(url, "POST", null, successCallback, errorCallback);
	}

	public void Put<T, J>(string url, T payload, string successCallback, string errorCallback){
		this.request<T,J>(url, "PUT", payload, successCallback, errorCallback);
	}

	public void Put<J>(string url, string successCallback, string errorCallback){
		this.request<Object,J>(url, "PUT", null, successCallback, errorCallback);
	}

	public void Delete<T, J>(string url, T payload, string successCallback, string errorCallback){
		this.request<T,J>(url, "DELETE", payload, successCallback, errorCallback);
	}

	public void Delete<J>(string url, string successCallback, string errorCallback){
		this.request<Object,J>(url, "DELETE", null, successCallback, errorCallback);
	}

	private void request<T, J>(string url, string method, T payload, string successCallback, string errorCallback){
		this.StartCoroutine(this.handleAsyncRequest<T, J>(payload, method, url, successCallback, errorCallback));
	}

	private IEnumerator handleAsyncRequest<T, J>(T payload, string method, string url, string successCallback, string errorCallback){
		UnityWebRequest webRequest = new UnityWebRequest (url, method);
		byte[] payloadBytes;
		if (payload != null) {
			payloadBytes = System.Text.Encoding.UTF8.GetBytes (this.toJSON<T> (payload));
		} else {
			payloadBytes = System.Text.Encoding.UTF8.GetBytes ("{}");
		}

		UploadHandler upload = new UploadHandlerRaw (payloadBytes);
		webRequest.uploadHandler = upload;
		webRequest.downloadHandler = new DownloadHandlerBuffer ();
		webRequest.SetRequestHeader ("Content-Type", "application/json");
		yield return webRequest.Send();

		if(webRequest.isError) {
			gameObject.BroadcastMessage (errorCallback, webRequest.error);
		}
		else {
			if (webRequest.responseCode < 200 || webRequest.responseCode >= 400) {
				gameObject.BroadcastMessage (errorCallback, webRequest.downloadHandler.text);
			} else {
				var response = this.fromJSON<J>(webRequest.downloadHandler.text);
				gameObject.BroadcastMessage (successCallback, response);
			}
		}
	}
}

usage

using UnityEngine;
using System.Collections;

[System.Serializable]
class RequestPayload {
	public string stringData;
	public int numberData;
	public CustomData data;
}

[System.Serializable]
class ResponsePayload {
	public CustomData data;
}

[System.Serializable]
class CustomData {
	public string key;
}


public class WebRequestTest : MonoBehaviour {

	public string url = "http://localhost:3000/api";

	void Start () {
		JsonRestClient restClient = GetComponent<JsonRestClient> ();

		RequestPayload req = new RequestPayload ();
		CustomData data = new CustomData ();
		data.key = "value1";
		req.data = data;
		req.numberData = 123;
		req.stringData = "stringData";

		restClient.Get<ResponsePayload> (this.url+"?test=value", "onSuccess", "onError");
		restClient.Post<RequestPayload, ResponsePayload> (this.url + "/test", null, "onSuccess", "onError");
		restClient.Post<ResponsePayload> (this.url, "onSuccess", "onError");
		restClient.Post<RequestPayload, ResponsePayload> (this.url, null, "onSuccess", "onError");
		restClient.Put<RequestPayload, ResponsePayload> (this.url, null, "onSuccess", "onError");
		restClient.Delete<RequestPayload, ResponsePayload> (this.url, null, "onSuccess", "onError");
	}

	void onSuccess(ResponsePayload response){
		Debug.Log (response.data.key);
	}

	void onError(string error){
			Debug.Log ("onError: " + error);
	}
}

@Finkes Hey my friend, what do you think about my REST Client for Unity? https://github.com/proyecto26/RestClient
I'm using a similar way to create the HTTP requests but supporting Promises! 👍

@jdnichollsc is surely cool approach, but sometimes, it makes you really embarrassed. Like : proyecto26/RestClient#179
Other than this issue, that repo is really cool. I've used it a lot.

But this piece of gist will never let you down.

@maifeeulasad any pull request is welcome! 👍