Fastimage

Description

Fastimage finds the dimensions/size or file type of a remote or local image file given the file path or url respectively. It streams the smallest amount of data necessary to ascertain the file size. This aspect is useful when getting the file size for very large images.

Features

• Supports bmp, jpeg, png and gif files
• Supports local files by using the file path of the image
• Supports blobs/objects by using the binary of the image
• Supports remote files by using the url of the image
• Follows redirects for a given url
• Fastimage.info/1 yields the image info as a struct %Fastimage{}
• Fastimage.size/1 yields the image size as a struct %Fastimage.Dimensions{width: _w, height: _h}
• Fastimage.type/1 yields the image type as an atom :bmp, :jpeg, :gif or :png

Examples

Fastimage.info("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => {:ok,
#      %Fastimage{
#        dimensions: %Fastimage.Dimensions{height: 142, width: 283},
#        image_type: :jpeg,
#        source: "https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg",
#        source_type: :url
#      }}

Fastimage.info!("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => %Fastimage{
#       dimensions: %Fastimage.Dimensions{height: 142, width: 283},
#       image_type: :jpeg,
#       source: "https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg",
#       source_type: :url
#     }

Fastimage.type("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => {:ok, :jpeg}

Fastimage.type!("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => :jpeg

Fastimage.size("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => {:ok, %Fastimage.Dimensions{height: 142, width: 283}}

Fastimage.size!("https://raw.githubusercontent.com/stephenmoloney/fastimage/master/priv/test.jpg")
# => %Fastimage.Dimensions{height: 142, width: 283}

Installation

Add fastimage to your list of dependencies in mix.exs:

def deps do
  [
    {:fastimage, "~> 1.0.0-rc2"}
  ]
end

Tests

mix test

Credit/Acknowledgements

• Based on Ruby Fastimage by Stephen Sykes
• Influenced by a PHP version of fastimage by Tom Moor

Licence

MIT Licence