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Cloning Internet Applications with Ruby by Chang Sau Sheong

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Designing the clone

Cloning TinyURL is relatively simple but there is some thought behind the design of the application. We will be building a clone of TinyURL called Tinyclone, which will be hosted at the domain http://tinyclone.saush.com.

Creating a short URL for each long URL

The domain of the short URL is fixed. What's left is the file pathname. We need to represent the long URL with a unique file pathname (a key), one for each long URL. This means we need to persist the relationship between the key and the URL.

One of the ways we can associate the long URL with a unique key is to hash the long URL and use the resulting hash as the unique key. However, the resulting hash might be long and hashing functions could be slow.

The faster and easier ...

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