Unity Online JSON Fetching
Unity Online JSON Fetching
Hello friends, in this article I will explain how we can fetch JSON data from our website on the internet using Unity, and in addition, I will mention a website where you can store your JSON data for free.
Additionally, I recommend looking at our other JSON posts.
Unity Creating JSON and Reading JSON
Online JSON Storage Site/Service
On the website with the domain .JSONbin.io, you can share your previously created or site-created JSON files for free and access the JSON files you need for your projects without paying any server fee.
I plan to give more detailed information about this site and its usage later, but for now, I won’t go into too much detail. The only thing you need to know for now is that when you upload it, it gives you an address like this:
"https://api.jsonbin.io/b/5e3602be50a7fe418c57f30c" this is the address of your first uploaded JSON file.
Other than that, according to the number of updates of your uploaded JSON file, you can choose the version you want of the JSON file by adding "/x" with the x number at the end, such as "https://api.jsonbin.io/b/5e3602be50a7fe418c57f30c/1" and "https://api.jsonbin.io/b/5e3602be50a7fe418c57f30c/2".
If you want to fetch the latest version, it is sufficient to add "/latest" as in "https://api.jsonbin.io/b/5e3602be50a7fe418c57f30c/latest".
Explanation of Fetching JSON Data
To fetch our JSON Data, first we will create 2 C# Scripts: one will contain data types (JSONData) that we will use to parse our JSON file, and the other will contain the code to fetch our JSON file and access it wherever we want (JSONController).
JSONData Script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
[System.Serializable] // allows jsonDataClass to be accessible from everywhere
public class jsonDataClass
{
public int Version; // Version variable in JSON
public string AppName; // AppName variable in JSON
public sorularClass[] Sorular; // We create this for the Sorular array variable in JSON and will fill its content below
}
[System.Serializable] // allows sorularClass to be accessible from everywhere
public class sorularClass
{
public int No; // No variable in Sorular array in JSON
public string Soru; // Soru variable in Sorular array in JSON
public string Dogru_Cevap; // Dogru_Cevap variable in Sorular array in JSON
public string Yanlis_Cevap1; // Yanlis_Cevap1 variable in Sorular array in JSON
public string Yanlis_Cevap2; // Yanlis_Cevap2 variable in Sorular array in JSON
public string Yanlis_Cevap3; // Yanlis_Cevap3 variable in Sorular array in JSON
}{"Version":71,"AppName":"QuizRun","Sorular":[{"No":1,"Soru":"Mehmet Akif İstiklal Marşını nerede yazmıtır ?","Dogru_Cevap":"Ankara - Taceddin Dergahı","Yanlis_Cevap1":"Ankara - Keçiören Camisi","Yanlis_Cevap2":"Ankara - Ayaş Dergahı","Yanlis_Cevap3":"Ankara - Ayasofya"}]}JSONController Script
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
public class jsonController : MonoBehaviour
{
public bool veriTabaniVarmi = false, Yenile=false; // Variables to check if data exists and to send requests until data arrives if not
public string jsonURL; // Variable of the site where we will fetch JSON data
[System.Obsolete] // allows access to jsonDataClass
void Start()
{
jsonURL = "https://api.jsonbin.io/b/5e3602be50a7fe418c57f30c/latest"; // Address where JSON data is located
StartCoroutine(getData()); // Coroutine function we use to fetch the data
// NOTE: You need to fetch special functions like IENumerator with Coroutine.
}
[System.Obsolete]// allows access to jsonDataClass
private void Update()
{
/* If we could not get the data, allows us to fetch the data again. */
if (Yenile)
{
StartCoroutine(getData());
Yenile = false;
}
}
[System.Obsolete] // allows access to jsonDataClass
IEnumerator getData()
{
Debug.Log("Wait");
WWW _www = new WWW(jsonURL); // We create the WWW variable and fetch our JSON file.
yield return _www; // We return the fetched data.
if (_www.error == null) // If we get no error
{
processJsonData(_www.text); // We send the data to be fetched.
veriTabaniVarmi = true; // We verify that the data is fetched.
}
else
{
Debug.Log("Error"); // If we cannot fetch the data, we print an error
}
}
public void processJsonData(string _url)
{
jsonDataClass jsnData = JsonUtility.FromJson<jsonDataClass>(_url); // We convert the fetched JSON file to the jsonDataClass data type we created.
Debug.Log("Application name : " + jsnData.AppName); // To fetch AppName variable in JSON data
foreach (sorularClass x in jsnData.Sorular){ // We use this to fetch the Sorular array in the JSON data
Debug.Log(x.No + "\n");
Debug.Log(x.Soru + "\n");
Debug.Log(x.Dogru_Cevap + "\n");
Debug.Log(x.Yanlis_Cevap1 + "\n");
Debug.Log(x.Yanlis_Cevap2 + "\n");
Debug.Log(x.Yanlis_Cevap3 + "\n");
}
// If we want to fetch not collectively but individually
Debug.Log(jsnData.Sorular[0].Soru);
/* For Sorular[x] here, you can type a number from 0 up to the max number in your JSON array
After putting ".", you can enter any variable inside the Sorular class found in jsonDataClass.
Such as No, Soru, Dogru_Cevap, Yanlis_Cevap1, Yanlis_Cevap2, Yanlis_Cevap3...
*/
}
}
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