避免未找到JPEG标记！&“错误”

Posted 2021-02-26

If you get "JPEG marker not found!" error when you try to open an image file you must read it in binary mode.

<%
 
my_file = File.open("image.jpg", "rb") {|f| f.read}
img = ImageSize.new( my_file )
 
 
# Testing: get img width with image_size lib.
 
img_witdh = img.get_width
 
%>