Invoke-WebRequest -Headers $headers -Method "POST" -Uri $uri -InFile $fileToAttach

In the above web request:

• $uri points to a public website.
• $fileToAttach points to a remote file share (Access via VPN).
• My connection is public internet (home internet), connected to above VPN to access the file share.

When I run this command, does the $fileToAttach download to my PC (in memory?) and then the file is sent to $uri? If not, what is the chain of events that happens?

CodePudding user response：

A quick test with Wireshark showed that Invoke-WebRequest, in order:

1. Starts a TCP connection to the destination server $uri
2. Loads the entire -InFile file from the remote server into memory,
3. Continues with the connection in 1, processing https/auth steps,
4. Posts the file