simulating file download with selenium on chrome browser for element with reactid

[Vikram]

I need to simulate file download on chrome browser and below links points to solutions which is what I'm looking for.

http://sqa.stackexchange.com/questions/2197/how-to-download-a-file-using-seleniums-webdriver ( refer to Adresco's answer )

http://ardesco.lazerycode.com/index.php/2012/07/how-to-download-files-with-selenium-and-why-you-shouldnt/

https://github.com/Ardesco/Ebselen/blob/master/ebselen-core/src/main/java/com/lazerycode/ebselen/customhandlers/FileDownloader.java

I'm not able to use this code as it requires attribute and in my case button has a reactid which triggers a end point call. Please refer to attached screen shot.

Can somebody please tell what changes I need to do to make code in above links work ?

Thanks in advance.

Regards, Vikram