On Mon, Oct 8, 2012 at 4:56 AM, Erich Rast <er...@snafu.de> wrote: > Hi, > > I'm not very experienced with using the web server yet and am looking > for advice and examples of how to download and upload files. I'm > particularly interested in any example of uploading a file using a > racket client (not a browser) to the web server, because it seems hard > to understand this from just the docs alone.
On the server side of things, I believe we can use bindings-assq on an HTTP request's collection of name-value binding pairs. The value we get back from bindings-assq can be a binding:file structure. Mirroring the example from http://docs.racket-lang.org/web-server/http.html#(def._((lib._web-server/http/request-structs..rkt)._request-bindings/raw)), an example that expects file input would look something like this: ;;;;;;;;;;;;;;;;;;;;;; (require web-server/http) ;; print-file-content: request -> void (define (print-file-content req) (match (bindings-assq #"file" (request-bindings/raw req)) [(struct binding:file (id filename headers content)) (printf "I got a file with content: ~s\n" content)])) ;;;;;;;;;;;;;;;;;;;;;; On the client side of things, it looks like we want to send a "multipart/form-data" encoding of the file's bytes over as the body of a post-pure-port. The details on how to build this thing should already be handled by a library... However, I'm a little disconcerted: I can't seem to find a Racket library on PLaneT or the standard library that handles this task. Basically, I'm looking for the counterpart of the net/uri-codec functions, but for encoding to the mulitpart/form-data format. I must be missing something? ____________________ Racket Users list: http://lists.racket-lang.org/users
