ngpestelos

Problem: You want to access Futon on a remote server but do not want port 5984 to listen for outside connections.

Solution: Tunnel through a local port using SSH. [1]

Example: 

  ssh -L5984:127.0.0.1:5984 ssh.example.com

[1] http://wiki.apache.org/couchdb/Frequently_asked_questions

ngpestelos

Had some time during the weekend to tinker with CouchApps and Evently.

0 - Preliminaries

 * setup couchdb 0.11 and couchapp
 * remove old couchdb versions lying around your system
 * there's a current issue with ubuntu 9.10 and javascript libraries (installing libmozjs removes firefox)
 * a CouchApp is a wrapper for a design doc

1 - Where to start?

ngpestelos

var sys = require("sys"), http = require('http'), encode = require('./encoding');

function createAuthorization(username, password) {
    return "Basic " + encode.base64(username + ":" + password);
}

Object.prototype.filter = function(fn) {
    var result = {};
    for (var name in this) {
        if (this.hasOwnProperty(name)) {

ngpestelos

var sys = require('sys'), http = require('http'), twitter = require('./twitter'), couch = require("./node-couch");

Array.prototype.each = function(fn) {
    for (var i = 0; i < this.length; i++) {
        var item = this[i];
        fn.call(null, item);
    }
    return this;
};

ngpestelos

(as of iOS 4.0.1) attaching the player to a view:

[[player view] setFrame: [viewForMovie bounds]];
[self.viewForMovie addSubview:player.view];

ngpestelos

Header scan and Function scan [1]

Reading code is like reading the Talmud [2]

Writing readable code
 * function names
 * variable names
 * loops (hard to debug)
 * short code (when to split functions)

ngpestelos

iOS app running on armv7.

  MobileVLCAppDelegate

  MVLCMovieViewController
    * creates a VLCMediaPlayer (sets delegate to itself and drawable surface to movieView)
    * sets media to the URL provided
    * tells media player to play

ngpestelos

Objective-C classes interfacing with libvlc.

  VLCLibrary
    * sharedInstance
    * creates default params
    * calls libvlc_new_with_builtins by passing lib_vlc_params

  VLCMedia mediaWithPath:
    * uses a shared instance to create a VLCMedia object (see initWithURL; VLCLibrary)
    * libvlc_media_new_location (see media.c)

ngpestelos

access

decoder

 * DecoderThread
 * DecoderProcess

demux

stream

ngpestelos

(see crypto/include/crypto_kernel.h)

Types
 * crypto_kernel_state_t
 * cipher_type_id_t
 * auth_type_id_t
 * crypto_kernel_t (at most one instance)

Functions
 * crypto_kernel_init