Displaying dynamically generated images in Yesod

Question

I\'m writing my first Yesod app. The application involves the user selecting to view a graph, dynamically generated based on data stored in a DB on the server. I know how to get

Answer 1

For a file on disk, you can use sendFile in your handler.

getImageR = do
    -- ... save image data to disk somewhere
    sendFile typeJpeg "/path/to/file.jpg"

For sending it from a ByteString in memory, use sendResponse.

getImageR = do
    bytes <- -- generate image data
    sendResponse (typePng, toContent bytes)

Make sure you specify the correct content type for your image.