I'm trying to use pdf.js with range requests (progressive loading of the pdf document) , but when i'm trying to load the pdfs from amazon s3 urls this error appears in the console :
Refused to get unsafe header "Accept-Ranges"

and the pdf doesn't load via 206 partial content (range requests) but 200 and after pdf download completed it, is viewed in the viewer.

this is an example of pdf url :
https://kotob.s3.amazonaws.com/book.pdf?Signature=irgVfoAZuPPIp5kpCesni2MzpLo%3D&Expires=1366576877&AWSAccessKeyId=AKIAILBHXSTPUIBTRMSA

any help