public IEnumerator <Null> NextPage(List <PolyAssetCatalog.AssetDetails> files,
string thumbnailSuffix)
{
string uri = m_PageToken == null ? m_Uri
: String.Format("{0}&page_token={1}", m_Uri, m_PageToken);
WebRequest request = new WebRequest(uri, App.GoogleIdentity, UnityWebRequest.kHttpVerbGET);
using (var cr = request.SendAsync().AsIeNull()) {
while (!request.Done)
{
try {
cr.MoveNext();
} catch (VrAssetServiceException e) {
e.UserFriendly = m_ErrorMessage;
throw;
}
yield return(cr.Current);
}
}
Future <JObject> f = new Future <JObject>(() => JObject.Parse(request.Result));
JObject json;
while (!f.TryGetResult(out json))
{
yield return(null);
}
if (json.Count == 0)
{
yield break;
}
JToken lastAsset = null;
var assets = json["assets"] ?? json["userAssets"];
foreach (JToken possibleAsset in assets)
{
try {
// User assets are nested in an 'asset' node.
JToken asset = possibleAsset["asset"] ?? possibleAsset;
if (asset["visibility"].ToString() == "PRIVATE")
{
continue;
}
// We now don't filter the liked Poly objects, but we don't want to return liked Tilt Brush
// sketches so in this section we filter out anything with a Tilt file in it.
// Also, although currently all Poly objects have a GLTF representation we should probably
// not rely on that continuing, so we discard anything that doesn't have a GLTF (1)
// representation. We look for PGLTF and GLTF as for a lot of objects Poly is returning
// PGLTF without GLTF.
bool skipObject = false;
foreach (var format in asset["formats"])
{
var formatType = format["formatType"].ToString();
if (formatType == "TILT")
{
skipObject = true;
break;
}
}
if (skipObject)
{
continue;
}
lastAsset = asset;
string accountName = asset["authorName"]?.ToString() ?? "Unknown";
files.Add(new PolyAssetCatalog.AssetDetails(asset, accountName, thumbnailSuffix));
} catch (NullReferenceException) {
UnityEngine.Debug.LogErrorFormat("Failed to load asset: {0}",
lastAsset == null ? "NULL" : lastAsset.ToString());
}
yield return(null);
}
JToken jPageToken = json["nextPageToken"];
m_PageToken = jPageToken != null?jPageToken.ToString() : null;
}
public Awaiter(Future <T> future)
{
m_future = future;
}
// Initiates the contact with Poly.
public IEnumerator <Null> GetAssetCoroutine()
{
OAuth2Identity identity = null;
if (!m_URI.StartsWith(VrAssetService.ApiHost))
{
m_Asset.SetRootElement(UnityWebRequest.EscapeURL(m_URI), m_URI);
}
else
{
identity = App.GoogleIdentity;
if (string.IsNullOrEmpty(App.Config.GoogleSecrets?.ApiKey))
{
IsCanceled = true;
yield break;
}
m_Ready = false;
WebRequest initialRequest = new WebRequest(m_URI, App.GoogleIdentity, UnityWebRequest.kHttpVerbGET);
using (var cr = initialRequest.SendAsync().AsIeNull())
{
while (!initialRequest.Done)
{
try
{
cr.MoveNext();
}
catch (VrAssetServiceException e)
{
Debug.LogException(e);
IsCanceled = true;
yield break;
}
yield return(cr.Current);
}
}
// Deserialize request string in to an Asset class.
MemoryStream memStream = new MemoryStream(Encoding.UTF8.GetBytes(initialRequest.Result));
using (var jsonReader = new JsonTextReader(new StreamReader(memStream)))
{
Future <JObject> f = new Future <JObject>(() => JObject.Parse(initialRequest.Result));
JObject json;
while (!f.TryGetResult(out json))
{
yield return(null);
}
if (json.Count == 0)
{
Debug.LogErrorFormat("Failed to deserialize response for {0}", m_URI);
yield break;
}
// Find the asset by looking through the format list for the specified type.
VrAssetFormat requestedType = m_Asset.DesiredType;
while (true)
{
var format = json["formats"]?.FirstOrDefault(x =>
x["formatType"]?.ToString() == requestedType.ToString());
if (format != null)
{
string internalRootFilePath = format["root"]?["relativePath"].ToString();
// If we successfully get a gltf2 format file, internally change the extension to
// "gltf2" so that the cache knows that it is a gltf2 file.
if (requestedType == VrAssetFormat.GLTF2)
{
internalRootFilePath = Path.ChangeExtension(internalRootFilePath, "gltf2");
}
// Get root element info.
m_Asset.SetRootElement(
internalRootFilePath,
format["root"]?["url"].ToString());
// Get all resource infos. There may be zero.
foreach (var r in format["resources"])
{
string path = r["relativePath"].ToString();
m_Asset.AddResourceElement(path, r["url"].ToString());
// The root element should be the only gltf file.
Debug.Assert(!path.EndsWith(".gltf") && !path.EndsWith(".gltf2"),
string.Format("Found extra gltf resource: {0}", path));
}
break;
}
else
{
// We asked for an asset in a format that it doesn't have.
// In some cases, we should look for a different format as backup.
if (requestedType == VrAssetFormat.GLTF2)
{
requestedType = VrAssetFormat.GLTF;
}
else
{
// In other cases, we should fail and get out.
Debug.LogErrorFormat("Can't download {0} in {1} format.", m_Asset.Id, m_Asset.DesiredType);
yield break;
}
}
}
}
}
// Download root asset.
var request = new WebRequest(m_Asset.RootDataURL, identity);
using (var cr = request.SendAsync().AsIeNull())
{
while (!request.Done)
{
try
{
cr.MoveNext();
}
catch (VrAssetServiceException e)
{
Debug.LogErrorFormat("Error downloading {0} at {1}\n{2}",
m_Asset.Id, m_Asset.RootDataURL, e);
yield break;
}
yield return(cr.Current);
}
}
m_Asset.CopyBytesToRootElement(request.ResultBytes);
// Download all resource assets.
foreach (var e in m_Asset.ResourceElements)
{
request = new WebRequest(e.dataURL, App.GoogleIdentity);
using (var cr = request.SendAsync().AsIeNull())
{
while (!request.Done)
{
try
{
cr.MoveNext();
}
catch (VrAssetServiceException ex)
{
Debug.LogErrorFormat("Error downloading {0} at {1}\n{2}",
m_Asset.Id, m_Asset.RootDataURL, ex);
e.assetBytes = null;
yield break;
}
yield return(cr.Current);
}
}
e.assetBytes = request.ResultBytes;
}
m_Ready = true;
}