@swapnil-pando/url-shortening
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This is an implementation of a URL Shortener Implementation without use of any external API using SHA1 encryption
Original URL => SHA(Original URL) => 40 bits encrypted hash
We slice this 40 digits hash into 5 equal parts of 8 bits each, which is converted into decimal which again is base62 encoded.
Why base-62 encoding is needed ?
If we see the allowed characters in our shortened url i.e [A-Z], [a-z], [0-9], then it comes to 26 + 26 + 10 = 62 characters
We want our shortened url to be less than or equal to 7 characters. So 62^7, which is coming upto 35 billion urls.
Hence we used base-62 encoding here.
In this implementation, it is made sure that the same long url will always generate the same shortened url, unless until some randomness is wanted and is given as true in the parameter to the helper function.
A long-url to short-url mapping is stored in database with an expiry of 3 months for a record for redirection. Also a retry mechanism is implemented to check if a shortened url already exists in db, before inserting a shortened url. The retry count is set-up to 10.
Repeats in a run of 1000000 are 99 with repeat percentage of 0.009899999999999999 Repeats in a run of 8500000 are 8416 with repeat percentage of 0.09901176470588235 Repeats in a run of 10000000 are 11725 with repeat percentage of 0.11725
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A URL shortener using SHA1 encryption with no external api
The npm package @swapnil-pando/url-shortening receives a total of 0 weekly downloads. As such, @swapnil-pando/url-shortening popularity was classified as not popular.
We found that @swapnil-pando/url-shortening demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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