Downloading dwg to Forge - autodesk-forge

Question

I'm in the process of learning the Forge platform. I'm currently using an example (Jigsawify) written by Kean Walmsley because it most accurately describes my goals. I'm running into an issue of getting my file to download from an Azure Storage Account to Forge. The error I receive is "The value for one of the HTTP headers is not in the correct format." My question is how does someone go about troubleshooting HTTP protocol when writing, in this case, a workitem in code? I can put in a breakpoint to view the workitem, but I'm not versed enough to understand where the flaw is in the HTTP header, or even where to find it. Is there a specific property of the workitem I should be looking at? If I could find the HTTP statement, I could test it, but I don't where I should find it.
Or am I just completely off base?
Anyway here's the code. It's a modified version of what Kean wrote:
static void SubmitWorkItem(Activity activity)
{
Console.WriteLine("Submitting workitem...");
CloudStorageAccount storageAccount =
CloudStorageAccount.Parse(Microsoft.Azure.CloudConfigurationManager.GetSetting("StorageConnectionString"));
StorageCredentials crd = storageAccount.Credentials;
CloudFileClient fileClient = storageAccount.CreateCloudFileClient();
CloudFileShare ShareRef = fileClient.GetShareReference("000scrub");
CloudFileDirectory rootDir = ShareRef.GetRootDirectoryReference();
CloudFile Fileshare = rootDir.GetFileReference("3359fort.dwg");
// Create a workitem
var wi = new WorkItem()
{
Id = "", // Must be set to empty
Arguments = new Arguments(),
ActivityId = activity.Id
};
if (Fileshare.Exists())
{
wi.Arguments.InputArguments.Add(new Argument()
{
Name = "HostDwg", // Must match the input parameter in activity
Resource = Fileshare.Uri.ToString(),
StorageProvider = StorageProvider.Generic // Generic HTTP download (vs A360)
});
}
wi.Arguments.OutputArguments.Add(new Argument()
{
Name = "Results", // Must match the output parameter in activity
StorageProvider = StorageProvider.Generic, // Generic HTTP upload (vs A360)
HttpVerb = HttpVerbType.POST, // Use HTTP POST when delivering result
Resource = null, // Use storage provided by AutoCAD.IO
ResourceKind = ResourceKind.ZipPackage // Upload as zip to output dir
});
container.AddToWorkItems(wi);
container.SaveChanges();
// Polling loop
do
{
Console.WriteLine("Sleeping for 2 sec...");
System.Threading.Thread.Sleep(2000);
container.LoadProperty(wi, "Status"); // HTTP request is made here
Console.WriteLine("WorkItem status: {0}", wi.Status);
}
while (
wi.Status == ExecutionStatus.Pending ||
wi.Status == ExecutionStatus.InProgress
);
// Re-query the service so that we can look at the details provided
// by the service
container.MergeOption =
Microsoft.OData.Client.MergeOption.OverwriteChanges;
wi = container.WorkItems.ByKey(wi.Id).GetValue();
// Resource property of the output argument "Results" will have
// the output url
var url =
wi.Arguments.OutputArguments.First(
a => a.Name == "Results"
).Resource;
if (url != null)
DownloadToDocs(url, "SGA.zip");
// Download the status report
url = wi.StatusDetails.Report;
if (url != null)
DownloadToDocs(url, "SGA-Report.txt");
}
Any help is appreciated,
Chuck

Answer 1

Azure requires that you specify the x-ms-blob-type header when you upload to a presigned URL. See https://github.com/Autodesk-Forge/design.automation-.net-input.output.sample/blob/master/Program.cs#L167

Answer 2

So, I was able to figure out how to download my file from Azure to Forge using Albert's suggestion of moving to a blob service. Here's the code:
static void SubmitWorkItem(Activity activity)
{
Console.WriteLine("Submitting workitem...");
CloudStorageAccount storageAccount =
CloudStorageAccount.Parse(Microsoft.Azure.CloudConfigurationManager.GetSetting("StorageConnectionString"));
CloudBlobClient BlobClient = storageAccount.CreateCloudBlobClient();
CloudBlobContainer cloudBlobContainer = BlobClient.GetContainerReference("000scrub");
CloudBlockBlob blockBlob = cloudBlobContainer.GetBlockBlobReference("3359fort.dwg");
// Create a workitem
var wi = new WorkItem()
{
Id = "", // Must be set to empty
Arguments = new Arguments(),
ActivityId = activity.Id
};
if (blockBlob.Exists())
{
wi.Arguments.InputArguments.Add(new Argument()
{
Name = "HostDwg", // Must match the input parameter in activity
Resource = blockBlob.Uri.ToString(),
StorageProvider = StorageProvider.Generic, // Generic HTTP download (vs A360)
Headers = new System.Collections.ObjectModel.ObservableCollection<Header>()
{
new Header() { Name = "x-ms-blob-type", Value = "BlockBlob" } // This is required for Azure.
}
});
}
wi.Arguments.OutputArguments.Add(new Argument()
{
Name = "Results", // Must match the output parameter in activity
StorageProvider = StorageProvider.Generic, // Generic HTTP upload (vs A360)
HttpVerb = HttpVerbType.POST, // Use HTTP POST when delivering result
Resource = null, // Use storage provided by AutoCAD.IO
ResourceKind = ResourceKind.ZipPackage, // Upload as zip to output dir
});
container.AddToWorkItems(wi);
container.SaveChanges();
// Polling loop
do
{
Console.WriteLine("Sleeping for 2 sec...");
System.Threading.Thread.Sleep(2000);
container.LoadProperty(wi, "Status"); // HTTP request is made here
Console.WriteLine("WorkItem status: {0}", wi.Status);
}
while (
wi.Status == ExecutionStatus.Pending ||
wi.Status == ExecutionStatus.InProgress
);
// Re-query the service so that we can look at the details provided
// by the service
container.MergeOption =
Microsoft.OData.Client.MergeOption.OverwriteChanges;
wi = container.WorkItems.ByKey(wi.Id).GetValue();
// Resource property of the output argument "Results" will have
// the output url
var url =
wi.Arguments.OutputArguments.First(
a => a.Name == "Results"
).Resource;
if (url != null)
DownloadToDocs(url, "SGA.zip");
// Download the status report
url = wi.StatusDetails.Report;
if (url != null)
DownloadToDocs(url, "SGA-Report.txt");
}
What isn't complete is the result section. The ZIP has nothing in it, but hey, baby steps right?
Thanks Albert.
-Chuck