PandemoniumSyndicate PandemoniumSyndicate - 1 month ago 31
C# Question

Unity GET/POST Wrapper

This is a Unity3d in C# question. The goal is to create an object such that I can pass in a URL and receive data via

GET
, an object that I would create the would be a wrapper for the WWW logic. I would also like a 'POST' object too, where I could supply a url and a 'Dictionary' of key-value pairs as the post arguements. Sooo... we ultimately would like something like this:

get_data = GET.request("http://www.someurl.com/somefile.php?somevariable=somevalue");


AND

post_data = POST.request("http://www.someurl.com/somefile.php", post)
// Where post is a Dictionary of key-value pairs of my post arguments.


To try and accomplish this, I use the
WWW
object. Now, in order to give the
WWW
object time to download, we need to have this happening inside a
MonoBehaviour
object and
yield
the results. So I got this, which works:

public class main : MonoBehavior
{
IEnumerator Start()
{
WWW www = new WWW("http://www.someurl.com/blah.php?action=awesome_stuff");
yield return www;
Debug.Log(www.text);
}
}


What I really want is this:

public class main : MonoBehavior
{
IEnumerator Start()
{
GET request = new GET("http://www.someurl.com/blah.php?action=awesome_stuff");
Debug.Log(request.get_data()); // Where get_data() returns the data (which will be text) from the request.
}
}


Now I have the main script attached to the single
GameObject
in the hierarchy (called root). Do I need to have the
GET
script attached to the root
GameObject
as well? Can I do that dynamically from
main
?

Ultimately, I need a solution that allows me to easily send
GET
and
POST
requests.

Cheers!

Answer

Ah, Got it!

My problem was a misunderstanding of how MonoBehaviour and Coroutines worked. The solution is very simple.

In the editor, make an empty GameObject. I named it DB. Then attach the following script to it:

using System;
using UnityEngine;
using System.Collections;
using System.Collections.Generic;
class DB : MonoBehaviour
{
    void Start() { }

    public WWW GET(string url)
    {
        WWW www = new WWW(url);
        StartCoroutine(WaitForRequest(www));
        return www;
    }

    public WWW POST(string url, Dictionary<string, string> post)
    {
        WWWForm form = new WWWForm();
        foreach (KeyValuePair<String, String> post_arg in post)
        {
            form.AddField(post_arg.Key, post_arg.Value);
        }
        WWW www = new WWW(url, form);

        StartCoroutine(WaitForRequest(www));
        return www;
    }

    private IEnumerator WaitForRequest(WWW www)
    {
        yield return www;

        // check for errors
        if (www.error == null)
        {
            Debug.Log("WWW Ok!: " + www.text);
        }
        else
        {
            Debug.Log("WWW Error: " + www.error);
        }
    }
}

Then, in your main script's start function, you can do this!

private DB db;
void Start()
{
    db = GameObject.Find("DB").GetComponentInChildren<DB>();
    results = db.GET("http://www.somesite.com/someAPI.php?someaction=AWESOME");
    Debug.Log(results.text);
}

Haven't tested the POST requests, but now all the logic is wrapped up! Send HTTP requests to your hearts desire, cheers!