Gopher Laboratory

Use Case

Build a service that acts as a HTTP Proxy for a redis instance - - > redis-service

Build a simple app that make use of the redis-service - - > url-shortener

redis-service @kitz99

A simple REST API built to establish communication between client & Redis instance over HTTP protocol

App has 4 endpoints:

• POST /set-key
• GET /get-key/
• GET /ping
• DELETE /delete-keys?keys=k1&keys=k2

Find here more details about using the API.

url-shortener @ionutvilie

root path (not in the scope):

• register http file server with a static index.html page
• html uses js + axios to communicate with the shortener path

shortener path:

• requestor sends long URL to the service
• url it is hashed with adler32 checksum algorithm
• hash and url are sent to the storage service as key - value
• short URL is sent to to requestor

redirect path

• key is received by the redirect handler
• storage service is contacted with the key in order to get the original URL
• user is redirected to the original URL

extra:

• metrics instrumentation with opencensus.io

Prerequisites:

1. Go Lang
2. Text editor: recommended vscode
3. If you choose to use vscode, the recommendation is to install
   • AtomKeyMap
   • Bracket Pair Colorizer
   • Go
4. A running instance of Redis server version 4.0 or Docker.

Please install this prerequisites on your machines before the workshop to be sure everything will work fine.