node.js - NodeJS: Rotating JPEG with GM not working -

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i'm writing api endpoint accept images , send them s3 server. before that, however, has orient images correctly not display wrong when in image tags. since jpegs use exif data determine image rotation , img tag not refer exif data orientation information, images appear sideways on website, right side on other platforms. here code rotating image:

if (file.mimetype == 'image/jpeg'){     var exifdata = parser.create(uploadedfile).parse();      if (exifdata.tags.orientation == 6 || exifdata.tags.orientation == 8){         var degrees = exifdata.tags.orientation == 6 ? 90 : 270;          gm(file.path).rotate('black', degrees).write(file.path, function(err){             if (err)                 return cb1(err);              finish();         });     }else         finish(); }else     finish();

finish() function sends file off s3. why image not rotating? have set overwrite existing file on rotate. there no errors being returned, entire call fail.


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