UnityWebRequest - timeout

Hi everyone,

I'm trying to use UnityWebRequest and control errors that com with timeout with my rest services, but I can't make it work. Unity docuementation does not describe in a very good way how to use it (here). So this is my code:

Script #1 - I try to catch the error caused by rq.timeout = 3; but it keeps on holding forever.

Code (CSharp):

1.  
2. IEnumerator regNewDev () {
3.    var rq = new UnityWebRequest("http://localhost/rest1", "POST");
4.    rq.SetRequestHeader("Content-Type", "application/json");
5.    rq.timeout = 3;
6.    yield return rq.SendWebRequest();
7.  
8.    try {
9.          debug.log (rq.downloadHandler.text);
10.       } catch (Exception e) {
11.       Debug.Log (e);
12.    }
13. }
14.  

Script #2 - I try to use rq.isNetworkError but it keeps on holding forever too.

Code (CSharp):

1.  
2. IEnumerator regNewDev () {
3.    var rq = new UnityWebRequest("http://localhost/rest1", "POST");
4.    rq.SetRequestHeader("Content-Type", "application/json");
5.    rq.timeout = 3;
6.    yield return rq.SendWebRequest();
7.  
8.    if (rq.isHttpError || rq.isNetworkError) {
9.       debug.log ("Error!!!");
10.    } else {
11.       debug.log (rq.downloadHandler.text);
12.    }
13. }
14.  

Could not find an example to fix this yet. Any sugestion?

 

Does it output any debug of your script? Or do you get any error? Is it c# or is hit javascript? Looks like javascript

 

Well it is actually not the complete code I am using. This should be...

Code (CSharp):

1.  
2. IEnumerator regNewDev () {
3.    cred creC = new cred();
4.    creC.n = nU.text;
5.    creC.p = pU.text;
6.    creC.i = getAndroidID();
7.    string jsonC = JsonUtility.ToJson(creC);
8.  
9.    var rq = new UnityWebRequest("http://localhost/rest01", "POST");
10.    byte[] bodyRaw = Encoding.UTF8.GetBytes(jsonC);
11.    rq.uploadHandler = (UploadHandler) new UploadHandlerRaw(bodyRaw);
12.    rq.downloadHandler = (DownloadHandler) new DownloadHandlerBuffer();
13.    rq.SetRequestHeader("Content-Type", "application/json");
14.    rq.timeout = 3;
15.    yield return rq.SendWebRequest();
16.  
17.    if (rq.isHttpError || rq.isNetworkError) {
18.       Debug.Log("Error");
19.    } else {
20.       Debug.Log("Success!!!");
21. }
22.  

As for setting up timeout = 3 is just for testing propouse. I want to be sure for this to fail, so then I will know how to control it on production.

 

Thnaks for the "cast" help.
About "Error" nor "Success", I tried turning off the REST web service, and when I do that it only keeps on holding for a response, but never fails.

So that's when the question appears, what is timeout for?, if this is not doing anithing. How can I control waiting response?

 

I have another question thet could not find width web page. Is the variable timeout assuming values as seconds or milliseconds?

 

I'm borrowing this thread for timeout related question..

I'm am using UnityWebRequest for downloading large files. It works as expected, but I noticed that if I kill my network connection in the middle of a download (by disconnecting the network cable), the UnityWebRequest never returns any error. It just keeps trying to receive data forever. So, I tried applying 10 second timeout for all my requests. But it seems that timeout just kills the download after 10 seconds, so timeout is not suitable for my purpose.

My question is, how could I detect that the connection to the server has been lost in the middle of a download with UnityWebRequest?

@Aurimas-Cernius

 

I waited for like 5 minutes after plugging out the network cable, but UnityWebRequest returned no error. Shouldn't that be enough for a timeout? What is the internal value for UnityWebRequest to wait in case the connection gets lost?

I ended up monitoring the downloadProgress variable with 0.25 second intervals and then calling Abort() if there is no progress for 120 consecutive checks (which means 30 second wait time). It works, but feel a bit hacky. It would be nice if the UnityWebRequest would automatically abort in case of lost connection.

 

Because if I set the timeout property for the UWR, it just aborts the download process after the specified amount of seconds (since sending the request), even if the file is still downloading. What I would need is a timeout that would start in case the connection is lost in the middle of the download process and would then raise an timeout error if the connection does not recover during the specified time.

Sure, I could set the timeout to like 1 hour, but even then there is a risk that it just aborts an otherwise successfull download process. The files I am downloading can be several gigabytes in size.

@Aurimas-Cernius Can you confirm that UWR timeout is intended to work as "max total time this request can take and force abort when elapsed" -kind of thing, rather than "max time to wait for another byte to be received in the middle of download?" -kind?

 

No one answered this question, I have the same issue in Unity 2019.4.22f1.

 

I'm also curious about that.

Specially, we're encountering a case of using UnityAssetBundleRequest which prints a "failed to decompress data for the asset bundle" error but the callback is never triggered.
We ended up setting up another timer to handle a case where we never get any result (error / success) and than handle re-downloading the bundle internally.

Would be great if Unity can guarantee the on complete callback will always be called in case of direct failures.