MyBinder DNS

checkdns.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import dns.resolver\n",
    "import requests"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Query default DNS server"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "/srv/conda/envs/notebook/lib/python3.7/site-packages/ipykernel_launcher.py:4: DeprecationWarning: please use dns.resolver.Resolver.resolve() instead\n",
      "  after removing the cwd from sys.path.\n"
     ]
    },
    {
     "ename": "Timeout",
     "evalue": "The DNS operation timed out after 2.103248119354248 seconds",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTimeout\u001b[0m                                   Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-2-6cb1525fcbaa>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m      2\u001b[0m \u001b[0mresolver\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtimeout\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m2\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      3\u001b[0m \u001b[0mresolver\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mlifetime\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0;36m2\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m----> 4\u001b[0;31m \u001b[0;32mfor\u001b[0m \u001b[0mrdata\u001b[0m \u001b[0;32min\u001b[0m \u001b[0mresolver\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mquery\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'www.google.co.uk'\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m'A'\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mtcp\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;32mFalse\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      5\u001b[0m     \u001b[0mprint\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mrdata\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m/srv/conda/envs/notebook/lib/python3.7/site-packages/dns/resolver.py\u001b[0m in \u001b[0;36mquery\u001b[0;34m(self, qname, rdtype, rdclass, tcp, source, raise_on_no_answer, source_port, lifetime)\u001b[0m\n\u001b[1;32m   1089\u001b[0m         return self.resolve(qname, rdtype, rdclass, tcp, source,\n\u001b[1;32m   1090\u001b[0m                             \u001b[0mraise_on_no_answer\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0msource_port\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mlifetime\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 1091\u001b[0;31m                             True)\n\u001b[0m\u001b[1;32m   1092\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1093\u001b[0m     \u001b[0;32mdef\u001b[0m \u001b[0mresolve_address\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mipaddr\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m*\u001b[0m\u001b[0margs\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;34m**\u001b[0m\u001b[0mkwargs\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m/srv/conda/envs/notebook/lib/python3.7/site-packages/dns/resolver.py\u001b[0m in \u001b[0;36mresolve\u001b[0;34m(self, qname, rdtype, rdclass, tcp, source, raise_on_no_answer, source_port, lifetime, search)\u001b[0m\n\u001b[1;32m   1041\u001b[0m                 \u001b[0;32mif\u001b[0m \u001b[0mbackoff\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1042\u001b[0m                     \u001b[0mtime\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0msleep\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mbackoff\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m-> 1043\u001b[0;31m                 \u001b[0mtimeout\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m_compute_timeout\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mstart\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mlifetime\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m   1044\u001b[0m                 \u001b[0;32mtry\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m   1045\u001b[0m                     \u001b[0;32mif\u001b[0m \u001b[0mdns\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0minet\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mis_address\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mnameserver\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;32m/srv/conda/envs/notebook/lib/python3.7/site-packages/dns/resolver.py\u001b[0m in \u001b[0;36m_compute_timeout\u001b[0;34m(self, start, lifetime)\u001b[0m\n\u001b[1;32m    948\u001b[0m                 \u001b[0mnow\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mstart\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    949\u001b[0m         \u001b[0;32mif\u001b[0m \u001b[0mduration\u001b[0m \u001b[0;34m>=\u001b[0m \u001b[0mlifetime\u001b[0m\u001b[0;34m:\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m--> 950\u001b[0;31m             \u001b[0;32mraise\u001b[0m \u001b[0mTimeout\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mduration\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m    951\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0mmin\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mlifetime\u001b[0m \u001b[0;34m-\u001b[0m \u001b[0mduration\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mtimeout\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m    952\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mTimeout\u001b[0m: The DNS operation timed out after 2.103248119354248 seconds"
     ]
    }
   ],
   "source": [
    "resolver = dns.resolver.Resolver(configure=True)\n",
    "resolver.timeout = 2\n",
    "resolver.lifetime = 2\n",
    "for rdata in resolver.query('www.google.co.uk', 'A', tcp=False):\n",
    "    print(rdata)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Query 8.8.8.8"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "resolver = dns.resolver.Resolver(configure=False)\n",
    "resolver.nameservers = ['8.8.8.8']\n",
    "#['127.0.0.1']#\n",
    "resolver.timeout = 2\n",
    "resolver.lifetime = 2\n",
    "for rdata in resolver.query('www.google.co.uk', 'A', tcp=False):\n",
    "    print(rdata)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "r = requests.get(f'http://{rdata.address}', allow_redirects=False)\n",
    "print(r)\n",
    "assert r.ok\n",
    "print(r.status_code, r.headers['Location'])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "r = requests.get(f'https://www.google.co.uk', allow_redirects=False)\n",
    "print(r)\n",
    "assert r.ok"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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environment.yml

name: dns
channels:
- conda-forge
dependencies:
- dnspython
- requests