Using Bash to determine if URL is HTTP or HTTPS

问题

Is there a way In bash to determine if a URL uses SSL? Before I send anything else to the URL I want to find out if it only accepts HTTP or HTTPS connections.

回答1:

You can use the below script if you have access to wget.

#/bin/bash    
URL=google.com
if wget --spider https://$URL 2>/dev/null; then
  echo "https is present"
else
  echo "https not present"
fi

Please note that you need to have http_proxy / https_proxy set.

I tested the above script in cygwin64 [dont have access to nix system as of now]

You should be also able to modify the same script using curl.

回答2:

• http

  if [[ $(wget -S --spider  http://yoursite  2>&1 | grep 'HTTP/1.1 200 OK') ]]; \
  then  echo "true";  fi
  

• https

  if [[ $(wget -S --spider https://yoursite  2>&1 | grep 'HTTP/1.1 200 OK') ]]; \
  then  echo "true";  fi
  

来源：https://stackoverflow.com/questions/39168736/using-bash-to-determine-if-url-is-http-or-https