servers

Like PaaS

“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

Keep It Small and Simple

URL Minification

GET minified URL redirect

CREATE minified URL

CosmosDB

Oh yeah!

Web App CosmosDB

CosmosDB

GET

POST

CosmosDB

GET

POST

Azure cacheUPDATE Change

Feed

CosmosDB

GET

POST

Azure cacheUPDATE

ChangeFeed

Queue TRIGGER

CosmosDB

GET

POST

Bindings are your friend

"bindings": [

{

"type": "httpTrigger",

"route": "{slug}",

"methods": [

"get"

],

"authLevel": "anonymous",

"name": "req"

}

],

Function, User, System & Admin

"bindings": [

{

"name": “minifiedUrl",

"type": "documentDB",

"databaseName": “MinifyRepository",

"collectionName": “MinifiedUrls",

"createIfNotExists": true,

"connection": “CosmosDbConnection",

"direction": "out"

}

],

Don’t write JSON

Where to put the code

Existing patterns & principles still apply!

private readonly ICosmosClient cosmosClient;

public CreateUrlHandler()

{

this.cosmosClient = new CosmosClient();

}

public CreateUrlHandler(ICosmosClient cosmosClient)

{

this.cosmosClient = cosmosClient;

}

CosmosDB

GET

POST

[FunctionName("Get")]

public static async Task<HttpResponseMessage> Run(

[HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "{slug}")]

HttpRequestMessage req,

string slug,

TraceWriter log)

{

var getUrl = new GetUrlHandler();

var minifiedUrl = await getUrl.Execute(slug);

if (minifiedUrl == null)

{

return req.CreateErrorResponse(HttpStatusCode.NotFound,

$"Minified value `{slug}` is not found.");

}

var response = req.CreateResponse(HttpStatusCode.Redirect);

response.Headers.Location = new Uri(minifiedUrl.FullUrl);

return response;

}

public static class Create

{

[FunctionName("Create")]

public static HttpResponseMessage Run(

[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "create")]

HttpRequestMessage req,

[DocumentDB("datbaseName", "collectionName",

PartitionKey = "MinifiedUrls",

CreateIfNotExists = true,

ConnectionStringSetting = "minifiedUrlConnectionString")]

out dynamic minifiedUrl,

TraceWriter log)

{

string jsonContent = req.Content.ReadAsStringAsync().Result;

var data = JsonConvert.DeserializeObject<MinifiedUrl>(jsonContent);

var create = new CreateUrlHandler();

minifiedUrl = create.Execute(data);

return req.CreateResponse(HttpStatusCode.Created,

$"api/{data.MinifiedSlug}");

}

}

Easy mode

master branch

to production

Pro mode

Check if you use slots

Point to the correct package

https://my.jdv.li/api/minifiedurl

or

https://my.jdv.li/minifiedurl

{

"$schema": "http://json.schemastore.org/proxies",

"proxies": {

"getminifiedredirect": {

"matchCondition": {

"methods": [ "GET" ],

"route": "/{slug}"

},

"backendUri": "https://%WEBSITE_HOSTNAME%/api/{slug}"

}

}

}

Matching conditions

https://github.com/Jandev/minifier

@Jan_de_V

jandv@4dotnet.nl

https://jan-v.nl