handling HTTP POST

[Ryan Waters]

Hi all,

I'm trying to use compojure and ring to parse POST data and haven't been able to figure out what I'm doing wrong.

I have some client-side clojure that takes a map literal, JSON encodes and URL encodes the result and puts it in an HTTP POST to my compojure/ring setup.

; e.g.

{:a "b"}

{"a":"b"}

data=%7B%22a%22%3A%22b%22%7D

When I do the POST, my server-side clojure doesn't parse the data={"a":"b"} but I know it's being sent because I did a packet capture to confirm the POST and "posttestserver.com" successfully parses it (<- handy site - thanks Henry).

Below is my server-side stuff:

- - -

(ns my-ns.core

  (:require [appengine-magic.core :as ae])

  (:use [compojure.core :only [defroutes GET POST]])

  (:use [ring.handler.dump :only [handle-dump]])

  (:require [compojure.route :as route]))

(defroutes my-ns-app-handler

  (POST "/admin/e2f/lineupload" {params :params} handle-dump)

  (route/not-found "Page not found"))

(ae/def-appengine-app threadknow-app #'threadknow-app-handler)

- - -

And here is the result of handle-dump:

- - -

{:remote-addr "123.45.67.89",

 :scheme :http,

 :response

 #<ResponseWrapper com.google.appengine.api.blobstore.dev.ServeBlobFilter$ResponseWrapper@24bfaa>,

 :servlet #<app_servlet threadknow.app_servlet@1949f78>,

 :request-method :post,

 :query-string nil,

 :route-params {},

 :content-type "application/x-www-form-urlencoded",

 :request #<Request POST /admin/e2f/lineupload HTTP/1.1

Content-Type: application/x-www-form-urlencoded

Content-Language: en-US

Cache-Control: no-cache

Pragma: no-cache

User-Agent: Java/1.6.0_22

Host: 127.0.0.1:8090

Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2

Connection: keep-alive

Content-Length: 28

>,

 :uri "/admin/e2f/lineupload",

 :server-name "127.0.0.1",

 :params {},

 :headers

 {"content-length" "28",

  "connection" "keep-alive",

  "accept" "text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2",

  "host" "127.0.0.1:8090",

  "user-agent" "Java/1.6.0_22",

  "pragma" "no-cache",

  "cache-control" "no-cache",

  "content-language" "en-US",

  "content-type" "application/x-www-form-urlencoded"},

 :content-length 28,

 :server-port 8090,

 :character-encoding nil,

 :body #<Input org.mortbay.jetty.HttpParser$Input@8d3d62>,

 :servlet-context

 #<AppEngineServletContext ServletContext@1ed7ac{/,file:/home/rwaters/projects/my-ns/war/}>}

- - -

Thank you!

[Ryan Waters]

My apologies.  I believe this question was answered in the Compojure group under the subject 'Binding POST content' by Bizics on Mar 3, 2011.