ece341.sh

#!/bin/bash

set -o errexit
set -o nounset

url='http://web.cecs.pdx.edu/~zeshan/ece341.htm'

filename='ece341'
extension='flv'
year='12'

rtmpserver='echo360.pdx.edu'
rtmpapp='echo/_definst_/'

# pull href content out of link
videos=( $(curl ${url} | grep echo360 | awk -F \" '{print $2}') )

# loop through the lectures
for ((i=0;i<${#videos[@]};i++)); do
  # class is on Tuesday and Thursday == 2 || 4
  day=$((2 + 2 * (${i} % 2)))
  # term started week 14
  week=$((14 + (${i} / 2)))
  # ece341##.flv
  file="${filename}$(printf %02d ${i}).${extension}"
  # grab the ugly hex directory name from the end of the url
  dir=$(echo ${videos[${i}]} | awk -F / {'print $NF'})
  if [[ -f ${file} ]]; then
    echo "${file} already downloaded"
  else
    # lecture #1 == 1214/2/df03063e-9dc6-4d64-bbe7-c71bd6ee9376/audio-video.flv
    rtmpdump -r rtmp://${rtmpserver}/${rtmpapp} -a ${rtmpapp} -y ${year}${week}/${day}/${dir}/audio-video.flv -o ${file}
  fi
done