Warning: Under Construction. I am using this site as my playground as I build gatsby-mdx and gatsby themes. During this time I will also repost new content to Medium

MOCL for Android Part 2: Drakma

In this post we will enable Drakma HTTP support in the Android/MOCL example code. I have forked the repo on Github for posterity. The first post is here and it will get you set up with the Android/MOCL example without Drakma.

First we must download dependencies.


My libs are located in mocl/systems. So I that’s where I place the folders of code, then link the .asd files. The instructions may change slightly with different versions of libs.

cd mocl/systems
ln -s drakma-1.3.7/drakma.asd drakma.asd
ln -s usocket-0.6.1/usocket.asd usocket.asd
git clone https://github.com/edicl/cl-ppcre.git
ln -s cl-ppcre/cl-ppcre.asd cl-ppcre.asd

Note that cl-ppcre-unicode.asd also exists. Also of note is the version of trivial-gray-streams in use here. As of this writing the current version is causing issues and the version presented below should be used.

ln -s flexi-streams-1.0.12/flexi-streams.asd flexi-streams.asd
git clone https://git.gitorious.org/trivial-gray-streams/wukix-trivial-gray-streams.git
ln -s wukix-trivial-gray-streams/trivial-gray-streams.asd trivial-gray-streams.asd
ln -s chunga-1.1.5/chunga.asd chunga.asd
ln -s cl-base64-3.3.3/cl-base64.asd cl-base64.asd
ln -s puri-1.5.5/puri.asd puri.asd

So after doing the linking dance we can uncomment the Drakma code in app.lisp (5 lines):

(pushnew :drakma-no-ssl *features*)
(require :drakma)
(declaim (call-in net-test))
(defun net-test ()
(print (drakma:http-request "http://wukix.com")))

but we have to change out http://wukix.com because as of this writing wukix has changed their site to redirect to https, and drakma can’t use ssl yet. In my case I changed it to http://www.cliki.net/ because it currently accepts over http.

and add net_test to our MainActivity.java. In this case we just log out the result

try {
String dataDir = getDataDir();
} catch (Exception e) {
// TODO Auto-generated catch block

and run:

cd mocl-example-lisp-contacts-android
mocl --android LispContacts app.lisp
cd LispContacts/jni

Then simply debug the project in ADK and watch the logcat output. The result should show up as an error, since we used Log.e("",""), with a tag of CL.