URL Unauthorized access error while accessing files from dropbox?

I'm confused.

What's the difference between DriveUtilities.GenerateSignature and DriveUtilities.GenerateThumbviewSignature?

And why does one piece of code use item.serverFileId and the other path? (Is the "serverFileId" the path?)

And both snippets seem to use AppConstants.DropBox_GetThumbnail as the base URL, but I thought the second code snippet was supposed to be retrieving the full image (not a thumbnail).

Yes the second one is for getting full image. No need to confuse we used same method but only the name is different here path and item.serverField means name of that particular image. In both cases everything is same except the URL. The url is different for full view image and thumbnail.

What's the value of AppConstants.DropBox_GetThumbnail?

DropBox_GetThumbnail = "https://api-content.dropbox.com/1/thumbnails/auto{0}"; {0} means we are appending image information here.

Both code snippets use AppConstants.DropBox_GetThumbnail. So they both seem to be requesting thumbnails.

Another issue I noticed: the first code snippet passes drive.AccessToken and drive.RefreshToken. Dropbox doesn't use a refresh token. Presumably you should be passing the access token secret as the second parameter.

Okay. Thanks for your support.

Hi Actually I sent you wrong code regarding success case.

Here it am sending you again.

WebProvider objWebProvider = new WebProvider();
//   path = WebUtility.UrlEncode(path);
var uri = DriveUtilities.GenerateSignature(
    new Uri(string.Format(AppConstants.DropBox_GetMediaItem, path), UriKind.RelativeOrAbsolute),
    "GET", DropBox_AccessToken, DropBox_AccessTokenSecret);

uri = await objWebProvider.GETRequest(uri).ConfigureAwait(false);

if (!string.IsNullOrEmpty(uri) && !uri.Equals(AppConstants.Unauthorized))
{
    DropBoxThumbnail result = JsonConvert.DeserializeObject<DropBoxThumbnail>(uri);

    if (result != null)
        url = result.url;
}

Are you still having trouble, or is your code working now?

Yes I have trouble in thumbnails.