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CSharp SDK dbx.Files.UploadAsync doesn't work

Continuous I.

Hi,

I've installed the CSharp DropBox SDK in a Console App (in part of my CI toolchain, although created in Visual Studio 2013 it is sitting in a Xamarin solution that is built using Jenkins on Mac using .Net v4.0.30319).

I call the dropbox SDK immediately after successfully copying an iPhone .IPA to a temp directory so that I can upload it to dropbox, however part of the following does not work:

LogMessage(" : In UploadToDropBox(...)");

using (var mem = new MemoryStream(Encoding.UTF8.GetBytes(content)))

{

LogMessage(" : In using (var mem = new MemoryStream(Encoding.UTF8.GetBytes(content)))");

try

{

var updated = await dbx.Files.UploadAsync(

folder + "/" + file,

WriteMode.Overwrite.Instance,

body: mem);

}

catch(Exception ex)

{

LogMessage(string.Format(" : ERROR: {0}", ex.Message));

}

LogMessage(" : Processed var updated = await dbx.Files.UploadAsync(...)");

LogMessage(" : Exiting using (var mem = new MemoryStream(Encoding.UTF8.GetBytes(content)))");

}

The first two Log messages get written to my log file, however none of the other messages do, nor does the try-catch throw and cause that message to be written to the log file.

The value in folder is "test", and the value in file is "test.txt", and the value of content is "Hello DropBox".

But the results are not written to dropbox, despite that the folder exists.

Any ideas on how to resolve this CSharp SDK issue?

Anthony

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Comments

Steve M.

I suspect that the error is that your path doesn't start with a slash. In API v2, paths should either be empty, meaning the root of the user's Dropbox, or they should start with a slash. So try using "/test" as the value of folder.

As to why you don't see the exception, my C# async/await knowledge is somewhat limited. Is the containing method marked async? I think from just this snippet of code, it may not be possible to tell if the exception should get caught here or not.

Continuous I.

Hi Steve, thanks for your tip, I've tried the forward slash but it doesn't work.

The primary call is essentially straight from the CSharp SDK, which is:

using (var dbx = new DropboxClient("My_Key"))

{

await UploadToDropBox(dbx, "/test", "test.txt", "Hello Dropbox"); // tried with /test and just test

}

And the method it calls (exactly from the SDK with a Console.WriteLine(...) removed:

async Task Upload(DropboxClient dbx, string folder, string file, string content)
{
    using (var mem = new MemoryStream(Encoding.UTF8.GetBytes(content)))
    {
        var updated = await dbx.Files.UploadAsync(
            folder + "/" + file,
            WriteMode.Overwrite.Instance,
            body: mem);
    }
}

But, as stated, without results.

Kind regards,

Anthony

Qiming Y.

Hi,

Would you mind providing your static void Main function? That would be helpful for us to figure out how you make the async call.

Continuous I.

Thanks Qiming, with a slight adjustment to that, the errors are now indeed throwing properly, I'll put my main function here and then the errors:

static void Main(string[] args)

{

var task = Task.Run((Func<Task>)Program.Run);

task.Wait();

}

static async Task Run()

{

CIPostBuildTask postBuild = new CIPostBuildTask();

await postBuild.Run();

}

The following line (which I added to my first post in a try-catch), shows the error that follows:

var full = await dbx.Users.GetCurrentAccountAsync();

ERROR: Error in call to API function "users/get_current_account": The given OAuth 2 access token is malformed.

In addition, the following line throws the following error in it's try-catch statement:

var updated = await dbx.Files.UploadAsync(

folder + "/" + file,

WriteMode.Overwrite.Instance,

body: mem);

ERROR: Error in call to API function "files/upload": The given OAuth 2 access token is malformed.

Continuous I.

Solved it!

Qiming - thanks, your help caused me to realise I'd used the App Key instead of the OAuth 2 Generated Access Token.

Steve - thanks, indeed I had to preface the folder with a forward slash as you said as with it, it works, and without it, it generates the error (quite a long one but here for posterity):

Error in call to API function "files/upload": HTTP Header "Dropbox-API-Arg": path: 'test/text.txt' did not match pattern '/.*'

Thanks Chaps, it was lovely to see the Dropbox toast informing me that the file had been uploaded!

Anthony