Thank you Matthew,
The message I was using did have CRLF line endings, but it had one too
many:
----------------------------------------------------------------------
#lang racket
(require net/mime)
(define message-string
(let ([sep "\r\n"])
(string-append
sep ;;This message starts with a \r\n <- EXTRA CRLF
"--9nbsYRvJBLRyuL4VOuuejw9LcAy" sep
"Content-Type: multipart/mixed; boundary=NdzDrpIQMsJKtfv9VrXmp4YwCPh" sep
sep
"--NdzDrpIQMsJKtfv9VrXmp4YwCPh" sep
"X-Riak-Vclock: a85hYGBgzGDKBVIcypz/fvp9087NYEpkzGNlaGCpPMGXBQA=" sep
"Location: /buckets/invoices/keys/RAQpCw8SssXlXVhiGAGYXsVmwvk" sep
"Content-Type: application/json" sep
"Link: </buckets/invoices>; rel='up'" sep
"Etag: 1qS8Wrr2vkTBxkITOjo33K" sep
"Last-Modified: Wed, 04 Jan 2012 17:12:32 GMT" sep
sep
"{ 'date': '11/02/2011' }" sep
"--NdzDrpIQMsJKtfv9VrXmp4YwCPh--" sep)))
(define ip
(open-input-string
message-string))
(let* ([analyzed (mime-analyze ip)] ;; port -> #<message>
[our-entity (message-entity analyzed)] ;; grab #<entity> of this message
[parts (entity-parts our-entity)] ;; #<entity> -> list of (inner)
#<message>
[inner-message (first parts)] ;; I only have one, grab it
[inner-entity (message-entity inner-message)] ;; get its #<entity> part
[body-proc (entity-body inner-entity)] ;; create a proc that returns the
#<entity> body
[tmp (open-output-string)])
(write (message-fields inner-message)) ;;Should be a string of headers?
Actual '()
(body-proc tmp) ;; call proc to get message body, it needs an output port
(write (get-output-string tmp))) ;; Should be json data? Actual ""
----------------------------------------------------------------------
It looks like the message I am working with doesn't conform to RFC. But
it also seems like a sane thing for the net/mime library to check for and
handle? If so I should be able to add it and send a pull request.
Shalom,
Jordan
On Sat, Jan 07, 2012 at 06:12:22AM +0100, Matthew Flatt wrote:
> I think the main problem is that the input string has LF newlines, and
> it needs to have CRLF newlines. You'll also want a terminating CRLF.
>
> With those changes, then `(message-fields inner-message)' instead of
> `(entity-fields inner-entity)' will get you the headers that include
> "X-Riak-Vclock: ...". The result of `(entity-fields inner-entity)'
> would correspond to a further multipart document in the inner message.
>
> At Fri, 6 Jan 2012 20:17:21 -0700, Jordan Schatz wrote:
> > I'm having difficulties parsing mime multipart messages (probably I
> > missed something in the docs again). I have this code:
> >
> > ----------------------------------------------------------------------
> > #lang racket
> >
> > (require net/mime)
> >
> > (define ip
> > (open-input-string
> > "--9nbsYRvJBLRyuL4VOuuejw9LcAy
> > Content-Type: multipart/mixed; boundary=NdzDrpIQMsJKtfv9VrXmp4YwCPh
> >
> > --NdzDrpIQMsJKtfv9VrXmp4YwCPh
> > X-Riak-Vclock: a85hYGBgzGDKBVIcypz/fvp9087NYEpkzGNlaGCpPMGXBQA=
> > Location: /buckets/invoices/keys/RAQpCw8SssXlXVhiGAGYXsVmwvk
> > Content-Type: application/json
> > Link: </buckets/invoices>; rel='up'
> > Etag: 1qS8Wrr2vkTBxkITOjo33K
> > Last-Modified: Wed, 04 Jan 2012 17:12:32 GMT
> >
> > { 'date': '11/02/2011' }
> > --NdzDrpIQMsJKtfv9VrXmp4YwCPh--"))
> >
> > (let* ([analyzed (mime-analyze ip)] ;; port -> #<message>
> > [our-entity (message-entity analyzed)] ;; grab #<entity> of this
> > message
> > [parts (entity-parts our-entity)] ;; #<entity> -> list of (inner)
> > #<message>
> > [inner-message (first parts)] ;; I only have one, grab it
> > [inner-entity (message-entity inner-message)] ;; get its #<entity>
> > part
> > [body-proc (entity-body inner-entity)] ;; create a proc that returns
> > the
> > #<entity> body
> > [tmp (open-output-string)])
> > (write (entity-fields inner-entity)) ;;Should be a list of string of
> > headers?
> > Actual '()
> > (body-proc tmp) ;; call proc to get message body, it needs an output port
> > (write (get-output-string tmp))) ;; Should be json data? Actual ""
> > ----------------------------------------------------------------------
> >
> > I thought it would write the headers, and message body, but instead I get
> > an empty list, and an empty string. I've been at it for a few hours and I
> > don't see what is wrong....
> >
> > Thanks : )
> > Jordan
> > ____________________
> > Racket Users list:
> > http://lists.racket-lang.org/users
____________________
Racket Users list:
http://lists.racket-lang.org/users
