Folks, Lately there's been a bunch of chatter on the list about image upload and figuring out how to put the image files in the right place to serve them again.
I've written a simple example of image uploading, storing the image in the RDBMS and then serving the image. You can find the code at: http://github.com/dpp/imagine/ The file upload snippet is very simple: class DoUpload { private def saveFile(fp: FileParamHolder): Unit = { fp.file match { case null => case x if x.length == 0 => case x => val blob = ImageBlob.create.image(x).saveMe ImageInfo.create.name (fp.fileName).mimeType(fp.mimeType).blob(blob).saveMe S.notice("Thanks for the upload") S.redirectTo("/") } } def render(in: NodeSeq): NodeSeq = bind("upload", in, "file" -> SHtml.fileUpload(saveFile _)) } If the blob is uploaded, it's put in a row in ImageBlob and an ImageInfo row is created to store the name and mime type. There are two different rows so that one doesn't have to pull the whole blob back when you're checking for the upload date. Serving the image is similarly concise: def serveImage: LiftRules.DispatchPF = { case req @ Req("images" :: _ :: Nil, _, GetRequest) if findFromRequest(req).isDefined => () => { val info = findFromRequest(req).open_! // open is valid here because we just tested in the guard // Test for expiration req.testFor304(info.date, "Expires" -> toInternetDate(millis + 30.days)) or // load the blob and return it info.blob.obj.map(blob => InMemoryResponse(blob.image, List(("Last-Modified", toInternetDate(info.date.is)), ("Expires", toInternetDate(millis + 30.days)), ("Content-Type", info.mimeType.is)), Nil, 200)) } } If the request matches /images/xxx where xxx is a name in the ImageInfo table, check to see if we can return a 304 (not modified). If not, we pull the blob from the database and return it. I hope this helps folks who are looking to manage and serve images. Thanks, David -- Lift, the simply functional web framework http://liftweb.net Beginning Scala http://www.apress.com/book/view/1430219890 Follow me: http://twitter.com/dpp Surf the harmonics -- You received this message because you are subscribed to the Google Groups "Lift" group. To post to this group, send email to lift...@googlegroups.com. To unsubscribe from this group, send email to liftweb+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/liftweb?hl=en.
