Sending post request to S3 with RestAssured

Question

I want to reproduce a postman call with RestAssured. The call send some text parameters and a file parameter to upload file to S3

It look like this :

In rest assured I've done this :

Response response = RestAssured
            .given()
            .header("Content-Type","multipart/form-data")
            .header("Connection","keep-alive")
            .formParams(credentials) // credentials is a hashmap containing all the text params
            .multiPart("file",new File("src/main/resources/media/desktop_1.webm"),"video/webm") 
            .post();

I'm getting this error NFOS: I/O exception (java.net.SocketException) caught when processing request to {s}->https://s3HIDDENURL: Connection reset by peer: socket write error avr. 26, 2022 3:40:29 PM org.apache.http.impl.client.DefaultHttpClient tryExecute

I've also tried to change the file from multipart to formParam like this : .formParam("file",new File("src/main/resources/media/desktop_1.webm"),"video/webm")

I've got another error Cannot serialize because cannot determine how to serialize content-type multipart/form-data