can not rename file in chrome

[zhiying8710]

chrome version: 42.0.2311.152 m

i use Download-File-JS to download verify code image, every image mush have a unique name,

here is the problem:

there is no response header like Content-Disposition: attachment; filename="aaa.jpg", but even i set download attribute to 'xxxx.jpg', still save as aaa.jpg, how can i handle this.

[sktguha]

Yes I have the same issue too