Hi, > Follow-up yesterday's thread of trying to screen files before > uploading with > cffile:
I didn't comment on this tread yesterday..so... > Just did some comparing of the MX behavior with CF5, to see if could glean > any valuable info from initial form before uploading using cffile > using CF5: File upload, is part of the http protocol, nothing to do with cf. Files are uploaded as mime attachments. The only thing available to cf is the post data, fields plus data, mime attachments, and anything else the browser supplies (cookies, agent string etc. ) > If did a cfdump of the form (initial form with file to upload), in MX, > regardless the type of file to be uploaded, it showed the form field value > as > that temporary file (.tmp) --nothing to suggest the actual extension, etc. > (Will probably use a JavaScript routine as a partial check.) The file is nearly always (exception below) uploaded to a tmp file. Once you call cffile the file is copied to the filename/location you supply. Maybe renamed to the clientfile name which is supplied in the mime header. > In CF5, however, if the file to be uploaded was something like .jpg, .doc, > it showed in dump as temporary files (.tmp). > But for things like .txt or .htm, it showed the total rendered > file in dump! > Not the name--the actual processed page! This is because the mime type for both htm & txt is plain/text so the browser can just upload it as a field. It takes an understanding of http, to know _WHY_ this is the way it is. Web developers really need to read the RFC's !!!! There are ways and means of figuring out what size a file is _before_ is uploaded. a) applet b) activeX c) java script in the newer browsers with the permissions set for JS to read local files However none of these are reliable. > Gotta get some productive work accomplished. Could investigate > this forever! Fun huh ?;-) WG ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Get the mailserver that powers this list at http://www.coolfusion.com Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
