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DNS

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	`1`	`+# DNS VERIFIER`
	`2`	`+`
	`3`	`+import json`
	`4`	`+import sys`
	`5`	`+from collections import OrderedDict`
	`6`	`+`
	`7`	`+import dns.resolver`
	`8`	`+`
	`9`	`+`
	`10`	`+def checker(dns_val=None) -> OrderedDict:`
	`11`	`+`
	`12`	`+ ip_values = None`
	`13`	`+ avail = False`
	`14`	`+`
	`15`	`+ if dns_val is None:`
	`16`	`+ raise ValueError("Sorry DNS not found, DNS is needed")`
	`17`	`+ if isinstance(dns_val, str) is False:`
	`18`	`+ raise TypeError("Sorry, \'DNS\' must be type \'str\'")`
	`19`	`+ try:`
	`20`	`+ output = dns.resolver.resolve(dns_val, 'A')`
	`21`	`+ ip_values = [ipval.to_text() for ipval in output]`
	`22`	`+ except dns.resolver.NXDOMAIN:`
	`23`	`+ avail = True`
	`24`	`+`
	`25`	`+ return OrderedDict([`
	`26`	`+ ("DNS", dns_val),`
	`27`	`+ ("IP", ip_values),`
	`28`	`+ ("AVAIL", avail),`
	`29`	`+ ])`
	`30`	`+`
	`31`	`+`
	`32`	`+if __name__ == '__main__':`
	`33`	`+ dns_val = None`
	`34`	`+ option = None`
	`35`	`+`
	`36`	`+ if len(sys.argv) > 1:`
	`37`	`+ if '--dns' in sys.argv:`
	`38`	`+ d_index = sys.argv.index('--dns')`
	`39`	`+ if d_index == sys.argv.index(sys.argv[-1:][0]):`
	`40`	`+ print("Error, DNS was not specified")`
	`41`	`+ sys.exit(1)`
	`42`	`+ dns_val = sys.argv[sys.argv.index('--dns') + 1]`
	`43`	`+ else:`
	`44`	`+ print("help:\nuse \'--dns\' for DNS specification")`
	`45`	`+ sys.exit(1)`
	`46`	`+ try:`
	`47`	`+ response = checker(dns_val=dns_val)`
	`48`	`+ except Exception as err:`
	`49`	`+ print(f"error: {err}")`
	`50`	`+ sys.exit(1)`
	`51`	`+`
	`52`	`+ print(json.dumps(response, indent=4))`
	`53`	`+ sys.exit(0)`

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	`1`	`+# DNS VERIFIER`
	`2`	`+## Description`
	`3`	`+A Script to verify the Domain Name System.`
	`4`	`+- This is useful to check for availability of DNS.`
	`5`	`+`
	`6`	`+### Language`
	`7`	`+- [X] Python`
	`8`	`+`
	`9`	`+### Instructions to run this application`
	`10`	`+`
	`11`	`+ 1. Python 3 must be installed in your system.`
	`12`	`+`
	`13`	`+ - For first time, run this in terminal or powershell`
	`14`	+```
	`15`	`+pip3 install -r requirements.txt`
	`16`	+```
	`17`	`+ 2. It will download all the required modules`
	`18`	`+`
	`19`	`+ - Now run the below command`
	`20`	`+`
	`21`	`+Usage:`
	`22`	`+`
	`23`	+```
	`24`	`+ python main.py --dns <DNS>`
	`25`	+```
	`26`	`+`
	`27`	`+example:`
	`28`	+```
	`29`	`+ python main.py --dns gaana.com`
	`30`	+```
	`31`	`+{`
	`32`	`+ "DNS": "gaana.com",`
	`33`	`+ "IP": [`
	`34`	`+ "23.211.222.138"`
	`35`	`+ ],`
	`36`	`+ "AVAIL": false`
	`37`	`+}`

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	`1`	`+dnspython==2.0.0`

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