Fix Copy as CURL with Multipart

[jgiovaresco]

The issue was located in the exportHar function. It was not handled file param correctly.
For this type of file, the value attribute is empty. Therefore we should take instead of the fileName

The issue also impacted the Generate code feature.

Closes #2282

Before

curl --request POST \
  --url http://localhost:3000/multipart \
  --header 'Content-Type: multipart/form-data' \
  --header 'content-type: multipart/form-data; boundary=---011000010111000001101001' \
  --form my_file=\
  --form my_field=my_value

After

curl --request POST \
  --url http://localhost:3000/multipart \
  --header 'Content-Type: multipart/form-data' \
  --header 'content-type: multipart/form-data; boundary=---011000010111000001101001' \
  --form my_second_file=@/Users/jgiovaresco/Documents/AFTER.gif \
  --form my_first_file=@/Users/jgiovaresco/Documents/Untitled \
  --form 'a_simple_value=my value'

[nijikokun]

Awesome change, I assume this works for multi-file as well?

[jgiovaresco]

Awesome change, I assume this works for multi-file as well?

You are assuming right ;)
I've updated the unit test to be sure. 😅

curl --request POST \
  --url http://localhost:3000/multipart \
  --header 'Content-Type: multipart/form-data' \
  --header 'content-type: multipart/form-data; boundary=---011000010111000001101001' \
  --form my_file=@/Users/jgiovaresco/Documents/Untitled \
  --form my_field=my_value \
  --form my_second_file=@/Users/jgiovaresco/Documents/AFTER.gif

[reynolek]

This change makes sense to me.

[develohpanda]

LGTM, sorry for the delay in getting to this!

[DMarby]

LGTM, thanks for fixing this @jgiovaresco!