using HttpWebRequest for Partial Download

Hi:

I am trying to implement partial download in my Unity project.
So far as my knowledge, UnityWebRequest does not have the AddRange() as System.Net.HttpWebRequest.
It seems System.Net one is my only choose here.

However, in my implementation, (System.Net.HttpWebResponse)myHttpWebRequest.GetResponse() having a performance issue that drop fps lower than 20 even inside StartCoroutine with some yield return null.

Is there any suggestion on that issue? thanks.

Code (CSharp):

1. System.Net.HttpWebRequest myHttpWebRequest = WebRequest.Create(url);
2. myHttpWebRequest.AddRange(i, i + windowSize - 1);
3. yield return null;
4.     using (HttpWebResponse myHttpWebResponse = (HttpWebResponse)myHttpWebRequest.GetResponse())
5.     {
6.         yield return null;
7.         //Do sth for these bytes
8.      }

 

You can do partial downloads using UnityWebRequest.

Code (csharp):

1.  
2. var download = new UnityWebRequest(_url, UnityWebRequest.kHttpVerbGET, downloadHandler, null);
3. var rangeHeader = "bytes=" + resumeOffset + "-";
4. download.SetRequestHeader("Range", rangeHeader);
5.  

 

Thanks, I just rewrite the HttpWebRequest part in UnityWebRequest

I also encounter another problem that when the UnityWebRequest redirectLimit not set to 0, it gets 404; set redirectLimit to 0, it says 301 Moved Permanently. have no clue how to deal with it.

 

Code (CSharp):

1. var download = UnityWebRequest.Post(url, form);
2. download.SetRequestHeader("Range", "bytes=0-100");
3. download.SendWebRequest();

This gives full of data. but range is "bytes=0-100". What is problem in these codes?

 

Same as @AgnosiaGames it downloads the whole file although the Range header seems good.

 

This is a handy way to reason about network transaction issues:

Networking, UnityWebRequest, WWW, Postman, curl, WebAPI, etc:

https://forum.unity.com/threads/using-unity-for-subscription-lists.1070663/#post-6910289

https://forum.unity.com/threads/unity-web-request-acting-stupid.1096396/#post-7060150

And setting up a proxy can be very helpful too, in order to compare traffic:

https://support.unity.com/hc/en-us/articles/115002917683-Using-Charles-Proxy-with-Unity

Otherwise you're really just guessing where the issue is happening.

 

I actually understood why I had this behavior: I was asking for a file on a local hard drive (e.g. C:/) and "Range" is not supported for local files.