javascript - Refused to get unsafe header "Content-Length" / reading ID3 tags from external mp3's -

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i trying write script loads id3 tags .mp3 file.

after searching hours, found one script had small size , did wanted, can't work cross-domain .mp3 files. have tried using csp headers bypass this, without luck.

is there way around this, downloading file in backgrond , showing progress bar, or can bypass way?

the error when loading external file:

refused unsafe header "content-length"

it's connected .getresponseheader(); far remember.


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