This document discusses serverless computing and summarizes a presentation on URL minification using Azure Functions. Key points include: - Serverless computing is when applications are run in stateless, event-driven functions that are triggered by events like HTTP requests. - The presentation demonstrates creating a URL minification service using Azure Functions that stores minified URLs in Cosmos DB and redirects requests using proxies. - It discusses bindings and triggers, function authorization, and deploying the code to Azure.

3. servers

4. Like PaaS

5. “If your PaaS can efficiently start instances in 20ms that run for
half a second, then call it serverless.”
Adrian Cockcroft - VP Cloud Architecture Strategy AWS

6. So, Containers?

8. Keep It Small and Simple

10. URL Minification

11. GET minified URL redirect
CREATE minified URL

12. QueriesCommands
Segregate all the Responsibilities

14. CosmosDB

15. Oh yeah!

17. Web App CosmosDB

19. CosmosDB
GET
POST

20. CosmosDB
GET
POST
Azure cache
UPDATE Change
Feed

21. CosmosDB
GET
POST
Azure cache
UPDATE
Change
Feed
Queue TRIGGER

22. Bindings & Triggers

23. "bindings": [
{
"type": "httpTrigger",
"route": "{slug}",
"methods": [
"get"
],
"authLevel": "anonymous",
"name": "req"
}
],
Function, User, System & Admin

24. "bindings": [
{
"name": "minifiedUrl",
"type": "documentDB",
"databaseName": "MinifyRepository",
"collectionName": "MinifiedUrls",
"createIfNotExists": true,
"connection": "CosmosDbConnection",
"direction": "out"
}
],

25. Don’t write JSON

27. Where to put the code

28. private readonly ICosmosClient cosmosClient;
public CreateUrlHandler()
{
this.cosmosClient = new CosmosClient();
}
public CreateUrlHandler(ICosmosClient cosmosClient)
{
this.cosmosClient = cosmosClient;
}

30. CosmosDB
GET
POST
Azure cache
UPDATE
Change
Feed
Queue TRIGGER

32. https://m.jdv.li/api/minifiedurl
or
https://m.jdv.li/minifiedurl

33. {
"$schema": "http://json.schemastore.org/proxies",
"proxies": {
"getminifiedredirect": {
"matchCondition": {
"methods": [ "GET" ],
"route": "/{slug}"
},
"backendUri": "https://%WEBSITE_HOSTNAME%/api/{slug}"
}
}
}
Matching conditions

34. https://github.com/Jandev/minifier
@Jan_de_V
jandv@4dotnet.nl
https://jan-v.nl