Work with Multipart Data

The following example iterates over a multipart payload and extracts data from each part.

The example uses the following functions:

read (in the script’s header) reads the multipart content from a multi variable that sets the boundary to 34b21.
mapObject iterates over the parts in the multipart data returned by read and returns the index and name key of each part within a JSON object.

DataWeave Script:

%dw 2.0
output application/json
var multi = '--34b21
Content-Disposition: form-data; name="text"
Content-Type: text/plain

Book
--34b21
Content-Disposition: form-data; name="file1"; filename="a.json"
Content-Type: application/json

{
  "title": "Java 8 in Action",
  "author": "Mario Fusco",
  "year": 2014
}
--34b21
Content-Disposition: form-data; name="file2"; filename="a.html"
Content-Type: text/html

<!DOCTYPE html>
<title>
  Available for download!
</title>
--34b21--'
var parsed = read(multi, "multipart/form-data", {boundary:'34b21'})
---
parsed.parts mapObject ((value, key, index) -> {(index): key})

Output:

{
  "0": "text",
  "1": "file1",
  "2": "file2"
}

For additional examples, see Multipart Format (Form Data) examples and functions referenced in Multipart (dw::module::Multipart).

Work with Multipart Data

See Also