UnityWebRequest (Legacy function) working but IMultipartFormSection not

Good morning,

I'm trying do make a POST with an image. A friend configured a server to then send back the photo via mail.

Doing the following with the lecacy converter it works perfectly:

Code (CSharp):

1.  
2. IEnumerator UploadLegacy()
3. {
4.     byte[] bytes = File.ReadAllBytes(attachmentPath);
5.  
6.     WWWForm form = new WWWForm();
7.     form.AddField("myField", "myData");
8.     //image
9.     form.AddBinaryData("file1", bytes, "pictureName.jpg", "image/jpeg");
10.    
11.     string URL = "myURL";
12.  
13.     UnityWebRequest www = UnityWebRequest.Post (URL, form);
14.  
15.     yield return www.Send();
16.  
17.     if (www.isError)
18.     {
19.         Debug.Log(www.error);
20.     }
21.     else
22.     {
23.         Debug.Log("Form upload complete!");
24.     }
25. }
26.  

But using IMultipartFormSection, it's half working. I have the log "Form upload complete!" but the server is never sending the photo back.

Code (CSharp):

1.  
2. IEnumerator Upload()
3. {
4.     byte[] bytes = File.ReadAllBytes(attachmentPath);
5.    
6.     List<IMultipartFormSection> form = new List<IMultipartFormSection>();
7.     form.Add(new MultipartFormDataSection("myField","myData"));
8.     //image
9.     form.Add( new MultipartFormFileSection("file1", bytes, "pictureName.jpg","image/jpeg") );
10.    
11.     string URL = "myURL";
12.  
13.     UnityWebRequest www = UnityWebRequest.Post (URL, form);
14.  
15.     yield return www.Send();
16.  
17.     if (www.isError)
18.     {
19.         Debug.Log(www.error);
20.     }
21.     else
22.     {
23.         Debug.Log("Form upload complete!");
24.     }
25. }
26.  

Is it an issue of formating or something ?

 

I'm having pretty much exactly the same problem. I thought it might be a bug (shown as fixed in Unity 2017.1), as seen here:

https://issuetracker.unity3d.com/is...hen-using-imultipartformsection-for-post-data

But now I have 2017.1 and the problem is still the same. Works with WWWForm but not with List<IMultipartFormSection>.

See here for other people having the same problem:

http://answers.unity3d.com/question...738.51584960.1499649808-1276352695.1499281552

 

I think what you're seeing here is that the Send() function is returning before the file is completely uploaded. It's uploading the file in chunks of bytes. When each chunk is transferred it yeilds, this gives you a chance to update a UI element to show the progress of the upload.

try putting this after your Send() call

while (www.isDone == false)
{
// You could update a UI element with the progress with something like this:
// MyProgressSlider.value = www.downloadProgress;
yield return null;
}