How can I convert a byte[] to a zip archive?

Hey guys, I've been trying to set up a flow where I download a zip file from a web URL using UnityWebRequest, store that zip file somewhere in my system, and then access its contents.
I've been able to download the file in the form of a byte[] i.e. downloadHandler.data, but I haven't been able to find out how to interpret that data as a zip archive and store it.

Can anyone please help me out here?

 

can save it as a file with .zip extension, File.WriteAllBytes(..)

saving files in mobiles is sometimes bit complicated though, is that android or ios?
i guess you'd like to save it into Downloads/ or so?

 

Hey thanks for the suggestion!
I did the following:

Code (CSharp):

1. File.WriteAllBytes(Application.persistentDataPath + "/MyZipFile.zip", results);

This did create a zip file as you said, but the file was empty, whereas I can see on the web URL that it contains some content. Is there something additional I need to account for?

 

you mean size is 0?
are you viewing the file from windows explorer? then it might show empty file sometimes.
check using some files app in device.

also check device log, if there were errors saving it.
https://answers.unity.com/questions/492681/how-to-use-adb-logcat.html#answer-571021

 

I am just executing this in the editor for now. My code threw no errors. However, I located the zip file where I stored it and tried to extract it. When I did that, I got the alert "The compressed zip folder is empty. Before you can extract files, you must copy files to this compressed (zipped) folder".

 

aa ok, what size the bytes data shows if print length?

 

63658

 

can you show your downloader script?
or compare to, https://stackoverflow.com/a/33873144/5452781

 

Code (CSharp):

1. private IEnumerator Co_DownloadZipFile()
2.     {
3.         UnityWebRequest www = new UnityWebRequest(zipFileUrl);
4.         www.downloadHandler = new DownloadHandlerBuffer();
5.  
6.         yield return www.SendWebRequest();
7.  
8.         if (www.result == UnityWebRequest.Result.ConnectionError || www.result == UnityWebRequest.Result.ProtocolError)
9.         {
10.             Debug.Log(www.error);
11.         }
12.         else
13.         {
14.             Debug.Log(www.downloadHandler.text.Contains("TestFile"));
15.             byte[] results = www.downloadHandler.data;
16.             Debug.Log(results.Length);
17.  
18.  
19.             File.WriteAllBytes(Application.persistentDataPath + "/MyZipFile.zip", results);
20.         }
21.     }

P.S. Line 14 returns true. "TestFile" is the name of one of the files in my zip file.