[drakma-devel] Error while trying to POST some JSON data

[Peter Stirling]

I was getting this error too, I reverted to the previous version of 
cl+ssl in quicklisp by putting it in the local-projects directory.

I've been meaning to report another problem I've had with the new 
version of drakma, it seems that when I POST login details to a site 
that I'm using it replies with a redirect, and then drakma tries to POST 
the login details to the redirected page rather than accessing it with a 
GET. I'll try and make a test case sometime this weekend.


On 21/03/13 21:41, Peter Kuchta wrote:
> Hi everybody,
>
> I'm trying to POST some JSON data to a web service:
>
>         (ql:quickload :st-json)
>         (ql:quickload :cl-json)
>         (ql:quickload :drakma)
>
>         (defvar *rc* (merge-pathnames (user-homedir-pathname) ".apirc"))
>
>         (defvar *user*
>           (with-open-file (s *rc*)
>             (st-json:read-json s)))
>
>         (defvar api-url (st-json:getjso "url" *user*))
>         (defvar api-key (st-json:getjso "key" *user*))
>         (defvar api-email (st-json:getjso "email" *user*))
>
>         (setf drakma:*header-stream* *standard-output*)
>
>         (defvar *req* '(("dataset" . "tigge")
>                   ("step"    . "24")
>                   ("date"    . "20071001")
>                   ("time"    . "00")
>                   ("origin"  . "all")))
>
>         (format t "json:~S~%" (json:encode-json-to-string *req*))
>
>         (defun retrieve (api request)
>           (let* ((cookie-jar (make-instance 'drakma:cookie-jar))
>                  (extra-headers (list (cons "From" api-email)
>                                       (cons "X-API-KEY" api-key)))
>                  (url (concatenate 'string api-url api "/requests"))
>                  (stream (drakma:http-request url
>                                :additional-headers extra-headers
>                                :accept "application/json"
>                                :method :post
>                                :content-type "application/json"
>                                :external-format-out :utf-8
>                                :external-format-in :utf-8
>                                :redirect 100
>                                :cookie-jar cookie-jar
>                                :content (json:encode-json-to-string 
> request)
>                                :want-stream t)))
>               (st-json:read-json stream)))
>
>      (retrieve "/datasets/tigge" *req*)
>
> Unfortunately, I get an error, although the data seems to be encoded 
> OK to JSON and the headers generated by drakma too, I think. 
> Apparently something is wrong with the :content (the list of integers 
> in the errors message is just the list of ASCII codes of the JSON 
> encoded data).
>
> json:"{\"dataset\":\"tigge\",\"step\":\"24\",\"number\":\"all\",\"levtype\":\"sl\",\"date\":\"20071001\",\"time\":\"00\",\"origin\":\"all\",\"type\":\"pf\",\"param\":\"tp\",\"area\":\"70\\/-130\\/30\\/-60\",\"grid\":\"2\\/2\",\"target\":\"data.grib\"}"
>
>     POST /v1/datasets/tigge/requests HTTP/1.1
>     Host: api.service.int <http://api.service.int>
>     User-Agent: Drakma/1.3.0 (SBCL 1.1.5; Darwin; 12.2.0; 
> http://weitz.de/drakma/)
>     Accept: application/json
>     Connection: close
>     From: me at gmail.com <mailto:me at gmail.com>
>     X-API-KEY: 19a0edb6d8d8dda1e6a3b21223e4f86a
>     Content-Type: application/json
>     Content-Length: 193
>
>
>     debugger invoked on a SIMPLE-TYPE-ERROR:
>       The value of CL+SSL::THING is #(123 34 100 97 116 97 115 101 116 
> 34 58 34
>                                   ...), which is not of type (SIMPLE-ARRAY
>     (UNSIGNED-BYTE 8)
>     (*)).
>
> Any idea what's wrong with this code? Many thanks in advance.
>
> Best regards,
> Piotr
>
>
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