Creating image file from base64 data [duplicate]

问题

This question already has answers here:

Open and save base64 encoded image data URI in Ruby (4 answers)

Closed 2 years ago.

I have a base64 encoded image data . I am pasting the first few characters

string='data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD     /2wBDAAYEBQYFBAYGBQYHBwYIChAKCgkJChQODwwQFxQYGBcUFhYaHSUfGhsjHBYWICwgIyYnKSopG   R8tMC0oMCUoKSj/2wBDAQcHBwoIChMKChMoGhYaKCgoKCgoKCgoKCgoKCgoKCgo......'

I am doing following to it in ruby

decoded_string=Base64.decode64 string
output_file = Tempfile.new(['image','.jpeg'])
output_file.binmode
output_file.write image 

After this when I am opening 'image.jpeg', It is giving error

Error interpreting JPEG image file (Not a JPEG file: starts with 0x75 0xab)

I also tried

File.open('a.jpeg', 'wb') do|f|
   f.write decoded_string
end 

In this case also, I got the same error.

What am I doing wrong?

回答1:

File.open('shipping_label.gif', 'wb') do|f|
  f.write(Base64.decode64(base_64_encoded_data))
end

This answer is from: How to save a base64 string as an image using ruby

来源：https://stackoverflow.com/questions/43248603/creating-image-file-from-base64-data