Is it possible to get Exif from a partial downloaded file?

[fcy]

Hello guys,

I'm trying to find this information in Google and I'm not getting any luck. What I want to do is to download only a specific size for a image file just to get its Exif metadata, using HTTPs Range Retrieval Requests.

Is there a safe size to assume that will give me access to the Exif tags? Something like: "download the first 700 kbytes".

[Phil Harvey]

If you pipe the file to ExifTool directly with the -fast option, then ExifTool will only download what is necessary.

The EXIF may be up to 64kB, but there may be a JFIF segment before it (which may contain a thumbnail), and XMP segments after it (which may be 100's of kB for some images).

- Phil

[fcy]

Thank you Phil. Sounds awesome, I'll give it a try.