File picker and Read file bytes activities

Permanently deleted user

March 19, 2019 17:50

I am trying to make the File Picker and Read Bytes activities work together so that I can allow a user to upload a shapefile and then use the data in it for further analysis. I might be on completely the wrong track but this is what made sense to me.

 

I have a client side workflow that allows them to pick the files and then I invoke a server side workflow to use the Read File Bytes activity. I pass the array of Files to the server side workflow from the client and then use the the Get Workflow Inputs. When I look at the trace log for the server, however, I see the array of 6 files selected (and my other argument 'Temp Folder' which is populate) but it looks like it was passed as a string and all of the entries are empty. It looks like this:

 

"results": [

  {

   "$type": "JobTraceLog",

   "start": "2019-03-19T17:40:50.5895267Z",

   "end": "2019-03-19T17:40:50.5979264Z",

   "traces": [

    "Starting Server Side Workflow to Get Shapefile",

    "Temp Folder: a97c371c-ab0d-433a-82ea-fac72850a278",

    "[",

    " {},",

    " {},",

    " {},",

    " {},",

    " {},",

    " {}",

    "]",

    "Input File: null",

    "Error: 0: Unexpected Error: Geocortex.Workflow.Runtime.Execution.Exceptions.ActivityExecutionException: [WF: Activity execution error] Failed to execute activity 52 with action gcx:wf:server::ReadFileBytes: [WF: Activity input error] Input path was invalid. Expected type string ---> Geocortex.Workflow.Runtime.ActivityInputException: [WF: Activity input error] Input path was invalid. Expected type string",

    "  at Geocortex.Workflow.Runtime.Utils.ActivityInputUtils.EnsureStringStrict(IDictionary`2 inputs, String input)",

    "  at Geocortex.Workflow.Server.Activities.ReadFileBytes.Execute(IDictionary`2 inputs, IActivityContext context)",

    "  at Geocortex.Workflow.Runtime.Execution.ActivityContext.ExecuteActivityHandler(IActivityHandler handler, IDictionary`2 inputs)",

    "  --- End of inner exception stack trace ---",

    "  at Geocortex.Workflow.Runtime.Execution.ActivityContext.ExecuteActivityHandler(IActivityHandler handler, IDictionary`2 inputs)",

    "  at Geocortex.Workflow.Runtime.Execution.ActivityContext.ExecuteFinish(IActivityHandler handler, IDictionary`2 inputs)",

    "  at Geocortex.Workflow.Runtime.Execution.ActivityContext.ExecuteStart()",

    "  at Geocortex.Workflow.Runtime.Execution.AmbientState.ExecuteCurrentContext()",

    "  at Geocortex.Workflow.Runtime.Execution.AmbientState.Execute()",

    "  at Geocortex.Workflow.Runtime.Execution.Engine.Run(Program program, RunOptions options)",

    "  at Geocortex.Workflow.Hosts.Server.Host.RunWorkflow(String workflowJson, IDictionary`2 inputs, IDictionary`2 trivia, CancellationToken cancellationToken)",

    "  at Geocortex.Workflow.Server.Foundation.WorkflowRunner.ProcessAsync(Object content)"

   ]

 

The error is the Read File Bytes activity failing obviously due to no input information.

 

Is what I am trying to accomplish possible?

Is there another way to approach this without getting into developing a custom activity?

I'd prefer to not use third party solutions that I have seen posted.

 

thanks in advance for any input.

Anthony

 

0

• 

  Permanently deleted user

  March 21, 2019 19:49

  I ended up doing 2 things to make a solution. I'm not entirely happy with it though, as it has got more separate parts than I would like and implementing becomes trickier.

   

  1) I wrote a client side custom activity for streaming the shapefile parts into byte data (in-memory). The SDK was easy to get started with.

   

  2) I used a simple Workflow 4 activity to take the byte data I got from the shapefile (for prj,shp,dbf) and converted to a featureset using the ShapefileToFeatureSet activity. I passed this back to my WF5 workflow as JSON and continued my processing.

   

  I would be curious to know if Latitude is intending to develop more of the server side activities to bring workflow 5 to a similar functionality that is in 4. I.e. the ShapefileToFeatureSet activity would be useful.

  0
• 

  Permanently deleted user

  March 23, 2019 00:07

  Hi Anthony,

  Could you post the ShapefileToFeatureSet activity suggestion to the Ideas page? https://communities.geocortex.com/s/ideas

  The server part of workflow 5 is still very young, so feedback about the activity selection is useful.

  0

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