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Web Addresses

In the real world, we use physical addresses to help us find where a friend lives, where a business is located, or where a party is being thrown (well, I don't because I'm not invited to parties, but I digress).

In computing, web clients find other computers over the internet using Internet Protocol (IP) addresses. Each device connected to the internet has a unique IP address.

Domain Names and IP Addresses

When we browse the internet, we type in a human readable domain name. That domain is converted into an IP address. The IP address tells our computer where the server is located on the internet.

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Assignment

Cloudflare is a tech company that provides a cool HTTP server that we can use to look up the IP address of any domain.

I've provided a getIPAddress function that makes a request to Cloudflare. The function takes a domain name as input and returns the IP address associated with that domain.

The function currently prints a string representation of the entire response we receive from Cloudflare.

Run the code to see the structure of the response and what fields it contains.
Import the "encoding/json" package and unmarshal the response as you have done before.
Update the getIPAddress function to return just the first IP address found within (if it exists).
- If there is no IP address, return an empty string and an error.

I've provided a DNSResponse struct in dns.go you might find useful.

If you encounter the error dial tcp 1.1.1.1:443: i/o timeout, Switch to Google's DNS service instead.
Change the url variable in getIPAddress function to utilize "https://dns.google/resolve?name=%s&type=A".