{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [],
   "source": [
    "from bs4 import BeautifulSoup\n",
    "from pathlib import Path\n",
    "from os.path import join"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {},
   "outputs": [],
   "source": [
    "data = \"\"\"\n",
    "<table><tr><th><img src=\"/icons/blank.gif\" alt=\"[ICO]\"></th><th><a href=\"?C=N;O=D\">Name</a></th><th><a href=\"?C=M;O=A\">Last modified</a></th><th><a href=\"?C=S;O=A\">Size</a></th><th><a href=\"?C=D;O=A\">Description</a></th></tr><tr><th colspan=\"5\"><hr></th></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/back.gif\" alt=\"[DIR]\"></td><td><a href=\"/traces/mmsys/2015/paper-5/\">Parent Directory</a></td><td>&nbsp;</td><td align=\"right\">  - </td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"desccred.zip\">desccred.zip</a></td><td align=\"right\">17-Nov-2015 02:21  </td><td align=\"right\">133M</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"desctxt.zip\">desctxt.zip</a></td><td align=\"right\">17-Nov-2015 02:21  </td><td align=\"right\"> 18M</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"descvis.zip\">descvis.zip</a></td><td align=\"right\">17-Nov-2015 02:22  </td><td align=\"right\"> 60M</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/text.gif\" alt=\"[TXT]\"></td><td><a href=\"devset_topics.xml\">devset_topics.xml</a></td><td align=\"right\">17-Nov-2015 02:22  </td><td align=\"right\">6.0K</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"gt.zip\">gt.zip</a></td><td align=\"right\">17-Nov-2015 02:22  </td><td align=\"right\"> 91K</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"img.zip\">img.zip</a></td><td align=\"right\">17-Nov-2015 02:24  </td><td align=\"right\">1.1G</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"imgwiki.zip\">imgwiki.zip</a></td><td align=\"right\">17-Nov-2015 02:24  </td><td align=\"right\">341M</td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/text.gif\" alt=\"[TXT]\"></td><td><a href=\"poiNameCorrespondences.txt\">poiNameCorrespondences.txt</a></td><td align=\"right\">17-Nov-2015 02:24  </td><td align=\"right\">905 </td><td>&nbsp;</td></tr>\n",
    "<tr><td valign=\"top\"><img src=\"/icons/compressed.gif\" alt=\"[   ]\"></td><td><a href=\"xml.zip\">xml.zip</a></td><td align=\"right\">17-Nov-2015 02:24  </td><td align=\"right\">811K</td><td>&nbsp;</td></tr>\n",
    "<tr><th colspan=\"5\"><hr></th></tr>\n",
    "</table>\n",
    "\"\"\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 53,
   "metadata": {},
   "outputs": [],
   "source": [
    "def parse_urls(url, exts):\n",
    "  ahrefs = soup.find_all('a')\n",
    "  urls = []\n",
    "  for a in ahrefs:\n",
    "    href = a['href']\n",
    "    if Path(href).suffix[1:] in exts:\n",
    "      urls.append('{}{}'.format(url, href))\n",
    "  return urls"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/desccred.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/desctxt.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/descvis.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/gt.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/img.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/imgwiki.zip\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/poiNameCorrespondences.txt\n",
      "http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/xml.zip\n"
     ]
    }
   ],
   "source": [
    "soup = BeautifulSoup(data,'lxml')\n",
    "burl = 'http://skuld.cs.umass.edu/traces/mmsys/2015/paper-5/devset/'\n",
    "urls = parse_urls(burl, ['zip', 'txt'])\n",
    "for u in urls:\n",
    "  print(u)\n",
    "\n",
    "# for row in rows:\n",
    "#   ahrefs = row.find_all(href=True)\n",
    "#   for a in ahrefs:\n",
    "#     href = a['href']\n",
    "#     if 'zip' in href:\n",
    "#       url = 'http://{}'.format(Path(join(url_root, Path(href).name)))\n",
    "#       print(url)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "%pip install lxml"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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