No error handling for the blank argument

[ehsandeep]

What's the problem (or question)?

Missing error management.

Do you have an idea for a solution?

Display generic error for missing required argument or display help menu for blank input.

How can we reproduce the issue?

1. ./subfinder (without any argument)

What are the running context details?

• Installation method : go get
• Client OS (e.g. Microsoft Windows 10): Mac OS
• Relevant console output (if any):

MacBook-Pro:bin tech$ ./subfinder 

   ____     __   _____         __       
  / __/_ __/ /  / __(_)__  ___/ /__ ____
 _\ \/ // / _ \/ _// / _ \/ _  / -_) __/
/___/\_,_/_.__/_/ /_/_//_/\_,_/\__/_/   

SubFinder v0.1.0      Made with ❤ by @Ice3man
==================================================

[-] Searching For Subdomains in Censys
[-] Searching For Subdomains in Crt.sh
[-] Searching For Subdomains in CertDB
[-] Searching For Subdomains in Certspotter
[-] Searching For Subdomains in Threatcrowd
[-] Searching For Subdomains in Findsubdomains
[-] Searching For Subdomains in DNSDumpster
[-] Searching For Subdomains in PassiveTotal
[-] Searching For Subdomains in PTRArchive
[-] Searching For Subdomains in Hackertarget
[-] Searching For Subdomains in Virustotal
[-] Searching For Subdomains in Securitytrails
[-] Searching For Subdomains in WaybackArchive
[-] Searching For Subdomains in ThreatMiner
[-] Searching For Subdomains in Riddler
[-] Searching For Subdomains in Netcraft
[-] Searching For Subdomains in Dnsdb
[-] Searching For Subdomains in Baidu
[-] Searching For Subdomains in Bing
[-] Searching For Subdomains in Ask

[+] Finding subdomains for : 
error: json: cannot unmarshal object into Go value of type []certspotter.certspotter_object

[Ice3man543]

Hey @madaratech I recently pushed some code adding domain list and recursion support. It is due to some errors there that I forgot to add message. I will do it in about an hour or so. Thanks for informing.

[Ice3man543]

Fixed in commit 25858f557a95ef4a9c33f82d9eec73f7ae0a6cbb. Thanks for notifying !

[ehsandeep]

Nice!

1 more thing, is that typo? top instead of to? @Ice3man543

[Ice3man543]

Yeah Will be fixing that soon.

[Ice3man543]

Done. @madaratech :d