Azure Cosmos DB + Functions Cookbook - Multi master & preferred region

precompiled-input.cs

    public static HttpResponseMessage Run(
        [HttpTrigger(AuthorizationLevel.Anonymous, "get", "post", Route = "HttpInputBindingByIdInRoute/{id}")] HttpRequestMessage req,
        [CosmosDB(databaseName: "%CosmosDBDatabase%",
            collectionName: "%CosmosDBCollection%",
            ConnectionStringSetting = "CosmosDBConnectionString",
            UseMultipleWriteLocations = true,
            PreferredLocations = "Central US,North Central US"
            Id = "{id}")] Document document,
        ILogger log)
    {
        if (document == null)
        {
            return new HttpResponseMessage(HttpStatusCode.NotFound);
        }

        return new HttpResponseMessage(HttpStatusCode.OK)
        {
            Content = new StringContent(JsonConvert.SerializeObject(document), Encoding.UTF8, "application/json")
        };
    }