How to get file name of form-data request body in Postman

Question

I cannot get file name of a file uploaded in form-data request body:

I tried: pm.request.body, it returns the request body:

{mode: "formdata", formdata: [1]}
mode: "formdata"
formdata: [1]
0: {…}
key: "file"
type: "file"
src: "/Users/errorfile.csv"

but when I tried pm.request.body.formdata.src, it returns undefined. When I tried pm.request.body.formdata[0].src, it shows error:

"TypeError: Cannot read properties of undefined (reading 'src')"

Answer 1

The pm.request.body.formdata is data object. So you need to convert JSON object.

Pre-request Script

const jsonData = JSON.parse(JSON.stringify(pm.request.body.formdata));
console.log(jsonData[0]);
console.log(jsonData[0].key);
console.log(jsonData[0].type);
console.log(jsonData[0].src);

console output

{key: "csvFile", type: "file", src: "/D:/temp/errFile.csv"}
csvFile
file
/D:/temp/errFile.csv

The JSON.parse(JSON.stringify()) technique is used to create a deep copy of an object in JavaScript.

The JSON.stringify() function converts JavaScript objects into JSON strings

JSON.parse() - This converts the JSON string back into a JavaScript object.

Once you have a deep copy of the form data, you can access its properties like any other JavaScript object.