如何向ruby Tempfile对象添加扩展名？

Question

如何为Tempfile对象添加扩展名？

image_path = "https://api.tinify.com/output/g85retpckb5fz2x8zpjrvtj0jcv1txm0"
image = open(image_path)
image.path # "/tmp/open-uri20191225-21585-oo95rb"

现在我要使该文件具有jpg扩展名，该怎么办？

我也曾尝试将其转换为File类，但也无法更改扩展名。

new_image = File.new(image)
new_image.path # "/tmp/open-uri20191225-21585-oo95rb"

Answer 1

使用FileUtils#mv在文件系统上物理移动文件。

image_path = "https://api.tinify.com/output/g85retpckb5fz2x8zpjrvtj0jcv1txm0"
image = open(image_path)
image.path # "/tmp/open-uri20191225-21585-oo95rb"

image_path_jpg = "#{image.path}.jpg"
FileUtils.mv(image.path, image_path_jpg)
image = open(image_path_jpg)
image.path # "/tmp/open-uri20191225-21585-oo95rb.jpg"

[请注意，由于该文件不再是临时文件，因此您现在要负责文件的删除。