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Postman -> HttpBin
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POST to https://httpbin.org/anything

1) At Postman, Body, choose "form-data", add below:
name = file1, browse from file 'hello.txt'
name = file2, browse from file 'image-1.jpg'
name = dept, value = 'HR'
name = status, value = 'active' 

2) See the Postman </> code snippet (HTTP)

3) Shift order: file1, dept, file2, status

4) See the boundary

5) See Content-Type

6) See the hypen count. Compare the hypen count between:
   (a) boundary
   (b) each part
   (c) after last part
   
7) At each part, see the empty line before each value

8) At each part, see the Content-Disposition, name and filename

9) At each part, see the Content-Type (different from header's Content-Type)

Reference:
https://en.wikipedia.org/wiki/MIME
https://www.w3.org/TR/html401/interact/forms.html#h-17.13


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FormData_View (FormData_View)
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Package name    : FormData
Iflow name      : FormData_View
Sender http path: /FormData_View


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FormData_View (Text Field and Text File)
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1) Post to iFlow FormData_View

2) At Postman, Body, choose "form-data", add below:
name = file1, browse from file 'hello.txt'
name = dept, value = 'HR'

3) See the body and header content-type


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FormData_View (Text File Only)
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1) Post to iFlow FormData_View

2) At Postman, Body, choose "form-data", add below:
name = file1, browse from file 'hello.txt'
name = file2, browse from file 'people-100.csv'

3) See the body and header content-type


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FormData_View (Text File and Binary File)
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1) Post to iFlow FormData_View

2) At Postman, Body, choose "form-data", add below:
name = file1, browse from file 'hello.txt'
name = file2, browse from file 'image-1.jpg'

3) See the body and header content-type




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FormData_Passthrough_to_HttpBin
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Package name    : FormData
Iflow name      : FormData_Passthrough_to_HttpBin
Sender http path: /FormData_Passthrough_to_HttpBin
Receiver http   : https://httpbin.org/anything

Passthrough, pass body and header Content-Type to HttpBin.

1) Post to iFlow FormData_Passthrough_to_HttpBin

2) At Postman, Body, choose "form-data", add below:
name = file1, browse from file 'hello.txt'
name = file2, browse from file 'image-1.jpg'

3) Allow header Content-Type

4) take image base64 encoded string, decode it back to binary, save as out-image-1.jpg.

5) Verify image can be viewed, nothing corrupted.