Javascript Application Octet Stream
The file is downloaded but badly in a wrong encoding! When i dowload the data in the servlet to a file its different to the file saved via your script. @Wilt if the client wants to save it, then it doesn't matter what headers are sent (you can 'save' or 'save link as' on anything in your browser), as the headers are information, not rules so attachment could be considered 'best not to display this yourself' while inline as 'best to display this yourself if you can'. Either way, most browsers will use the filename value as the suggested name.
I have tried using canvas.toDataUrl and canvas.toBlob to get an base64 encoded string of an image (screenshot).
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In both toDataUrl and toBlob, you can set the mime type as image/jpeg, image/png and image/webp, but can you set it to none, or application/octet-stream?
ex.
Whenever I try to do that, it just encodes it with image/png mime type.
If it's not possible, how can I get a base64 encoded string of an image with application/octet-stream mime type?
1 Answer
The mime-type you pass in these function is a hint for the browser as to which encoder they should use to generate an image file.
application/octet-stream doesn't correspond to any image encoder and is thus not supported by any browser.
