sonhnguyen / ledis

a simple, stripped down version of a Redis server (ledis)

ledis

Functionalities:

1. Strings:

   • GET (key): get a string value at key already
   • SET (key, value): set a string value at key

2. Lists: List is an ordered collection (duplicates allowed) of string values

   • LLEN (key): return length of a list
   • RPUSH (key, []values): append 1 or more values to the list, create list if not exists, return length of list after operation.
   • LPOP (key): remove and return the first item of the list
   • RPOP (key): remove and return the last item of the list
   • LRANGE (key, start, stop): return a range of element from the list (zero-based, inclusive of start and stop), start and stop are non-negative integers

3. Sets: Set is a unordered collection of unique string values (duplicates not allowed)

   • SADD (key, [values]): Add values to set stored at key.
   • SCARD (key): Return the number of elements of the set stored at key.
   • SMEMBERS (key): Return array of all members of set.
   • SREM (key, [values]): Remove values from set.
   • SINTER ([keys]): Set intersection among all set stored in specified keys. Return array of members of the result set.

4. Data expiration:

   • KEYS: List all available keys.
   • DEL (key): Delete a key.
   • FLUSHDB: Delete all keys.
   • EXPIRE (key, seconds): Set a timeout on a key, seconds is a positive integer. Return the number of seconds if the timeout is set.
   • TTL (key): Queries a key Time to Live in seconds

5. Snapshot:

   • SAVE: Save the db into "snapshot.db" file (windows).
   • RESTORE: Restore the db from "snapshot.db".

Installation

go install and run binary file.

Usage

The program will expose a POST endpoint at /, put the commands above into the body to use.