Package urlshortener

The urlshortener package provides a simple mechanism for generating shortened URLs using MD5 hashing. It manages a mapping between original long URLs and their shortened counterparts.

Types

type URLShortener

URLShortener is a structure that serves as a registry for URL mappings.

type URLShortener struct {
    urls map[string]string
}

• urls: A map where the keys represent the shortened URL strings and the values represent the original long URLs.

Functions

func Shorten

func shorten(input, domain string) string

shorten creates a shortened version of a given input URL using the specified domain.

• Hashing: The function uses the MD5 algorithm to hash the input URL.
• Encoding: The resulting hash is encoded into a hexadecimal string, and the first 7 characters are used as the unique identifier.
• Collision Handling: If a generated URL already exists in the registry, the function re-hashes the generated URL to attempt to create a unique identifier.
• Output: Returns a formatted string in the pattern https://{domain}/{hash_prefix}.

Example:

// Returns: "https://tinyurl.co.in/29fjfj"
shorten("amazon.com", "tinyurl.co.in") 

func Check (Internal)

func check(input string) bool

check is a helper function that determines whether a specific shortened URL already exists within the URLShortener map.

• It returns true if the URL exists and false otherwise.