EMS - File transfer from LSR device to Thingworx

[jknorr]

I have a LSR device that is connected to a EMS gateway. The EMS communicates with ThingWorx.
Is it possible to transfer files from the LSR device to a repository in the ThingWorx Platform or can you
just transfer files that are located at the device where the EMS is executed?

[supandey · Accepted solution]

Hi @jknorr file transfer is configured and done by EMS, LSR doesn't have direct access to ThingWorx anyhow.

If you have files existing on a different server than the EMS, you could still configure the virtual folders in the EMS configuration to transfer those files. 

Please feel free to correct me if i got your question wrong.

[berik]

I think it is possible, though one could argue about the meaning of the LSR transferring, because the EMS is doing the actual transfer. The code below sends an http post command to the EMS to initiate the transfer.

-- Copies files from the edge to the server

-- Limitation - Hard coded folder for file target

function copyFileToServer(filename)

  local xferjson = json.encode({

  sourceRepo = <name of my remote thing>,

  sourcePath = "/out/", -- this is the output directory configured in your config.json file.

  sourceFile = filename,

  targetRepo = <name of your file repository on the server>,

  targetPath = "/", -- path within the file repository

  targetFile = filename,

  timeout = 600}) -- time allowed to elapse until the ems will timout the file transfer

-- and stop the transfer. It will leave the file in a state with a name of

-- "myfile.txt.part". It can pick up from where it left off if resent.

  local myheaders = {}

  local resp, code

  myheaders["Content-Type"] = "application/json"

  myheaders["Authorization"] = "Basic "..tw_utils.base64_encode("user:password") -- needed if you use http_server authentication in config.json

  resp, code = ps_http.post("127.0.0.1", myData["httpPort"],   "/Thingworx/Subsystems/FileTransferSubsystem/Services/Copy", xferjson, myheaders)

  log.trace("resp", resp)

  log.trace("code", code) -- http post response code. 200 is good.

  log.info("Finished post", filename) --this is really an async transfer, so this is just saying that post

-- was called. This doesn't mean that the file transfer has completed.

end