Dropbox API Upload Errors using .NET SDK

Greg-DB 

Thank-you for the information !

I am pasting a snippet below from AssemblyInfo.cs of Dropbox API SDK which suggest its v2 SDK.

[assembly: AssemblyTitle("Dropbox.Api")]
[assembly: AssemblyDescription("Official Dropbox .Net v2 SDK")]
[assembly: AssemblyConfiguration("")]
[assembly: AssemblyCompany("Dropbox Inc.")]
[assembly: AssemblyProduct("Dropbox.Api")]
[assembly: AssemblyCopyright("Copyright © Dropbox Inc")]
[assembly: AssemblyTrademark("")]
[assembly: AssemblyCulture("")]
[assembly: AssemblyVersion("4.0.0")]
[assembly: AssemblyFileVersion("4.0.6562")]

I again got failure today while doing uploads on my both new QA servers.
The uploads surprisingly worked fine yesterday.

a. Our code that calls Dropbox API SDK method.

DropboxClient client = new DropboxClient(accesstoken, config);
FileMetadata fileMetadata = await client.Files.UploadAsync(remotePath, mode: WriteMode.Overwrite.Instance, autorename: false, body: stream);

b. Dropbox API SDK method stack:

- FileUserRoutes.cs

public t.Task<FileMetadata> UploadAsync(string path,
WriteMode mode = null,
bool autorename = false,
sys.DateTime? clientModified = null,
bool mute = false,
col.IEnumerable<global::Dropbox.Api.FileProperties.PropertyGroup> propertyGroups = null,
io.Stream body = null)
{
var commitInfo = new CommitInfo(path, .....
return this.UploadAsync(commitInfo, body);
}

- FileUserRoutes.cs

public t.Task<FileMetadata> UploadAsync(CommitInfo commitInfo, io.Stream body)
{
return this.Transport.SendUploadRequestAsync<CommitInfo, FileMetadata, UploadError>(commitInfo, body, "content", "/files/upload", "user", global::Dropbox.Api.Files.CommitInfo.Encoder, global::Dropbox.Api.Files.FileMetadata.Decoder, global::Dropbox.Api.Files.UploadError.Decoder);
}

- DropboxRequestHandler.cs

async Task<TResponse> ITransport.SendUploadRequestAsync<TRequest, TResponse, TError>(
TRequest request,
Stream body,
string host,
string route,
string auth,
IEncoder<TRequest> requestEncoder,
IDecoder<TResponse> resposneDecoder,
IDecoder<TError> errorDecoder)
{
..
var res = await this.RequestJsonStringWithRetry(host, route, auth, RouteStyle.Upload, serializedArg, body)
.ConfigureAwait(false);
..
..
}

- DropboxRequestHandler.cs

private async Task<Result> RequestJsonStringWithRetry(
string host,
string routeName,
string auth,
RouteStyle routeStyle,
string requestArg,
Stream body = null)
{

..
..
return await this.RequestJsonString(host, routeName, auth, routeStyle, requestArg, body)
.ConfigureAwait(false);
..
..
}

- DropboxRequestHandler.cs

private async Task<Result> RequestJsonString(
string host,
string routeName,
string auth,
RouteStyle routeStyle,
string requestArg,
Stream body = null)
{
....
....
var requestId = GetRequestId(response);
....
....
}

- DropboxRequestHandler.cs

private string GetRequestId(HttpResponseMessage response)
{
IEnumerable<string> requestId;

if (response.Headers.TryGetValues("X-Dropbox-Request-Id", out requestId))
{
return requestId.FirstOrDefault();
}

return null;
}