Currently when you upload a file via Invoke-Restmethod or Invoke-Webrequest and use the -InFile parameter, it puts a lock on the file, so no other process can read it. It does not set seem to set the FileShare.Read flag

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I am trying to parallelize to upload of single files to multiple locations.

Steps to reproduce

Run below command twice at the same time, either in multiple PS hosts, via jobs or runspaces.

Invoke-RestMethod -uri "https://artifactory/artifactory/my-tools/testfile.iso" -Method Put -InFile "C:\temp\testfile.iso" -Credential $creds -ContentType "multipart/form-data"

Expected behavior

I would not expect this to error since it is a read operation, I would suggest that the file is opened with FileShare.Read Flag, so you can have multiple processes access the file at the same time.

Actual behavior

When you run the commands simultaneously, you will get an The process cannot access the file 'C:\temp\testfile.iso' because it is being used by another process. error

Environment data

> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      6.1.0-rc.1
PSEdition                      Core
GitCommitId                    6.1.0-rc.1
OS                             Microsoft Windows 10.0.17738
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0...}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0