{"id":1525,"date":"2017-12-18T07:00:48","date_gmt":"2017-12-18T01:30:48","guid":{"rendered":"http:\/\/www.upnxtblog.com\/?p=1525"},"modified":"2020-12-21T18:25:37","modified_gmt":"2020-12-21T12:55:37","slug":"azure-functions-tutorial-on-http-trigger-store-data-in-cosmos-db","status":"publish","type":"post","link":"https:\/\/www.upnxtblog.com\/index.php\/2017\/12\/18\/azure-functions-tutorial-on-http-trigger-store-data-in-cosmos-db\/","title":{"rendered":"Serverless tutorial – On HTTP trigger store data in Azure Cosmos DB"},"content":{"rendered":"
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In the last tutorial<\/a>, we have created a new hello world function from the Azure portal. Azure Functions<\/a><\/strong> lets you execute your code in a serverless environment without having to first create a VM or publish a web application. In Azure Functions, input and output bindings provide a declarative way to connect to external service data from your function.<\/p>\n

In this tutorial, we are going to check how to update the function we have created to have an output binding to store the data<\/strong>. Azure Functions allows writing code in response to events in Azure and other services, through triggers and bindings.<\/p>\n\n

Triggers and Bindings<\/h2>\n

Triggers<\/strong> and bindings<\/strong> are a declarative way to define how a function is invoked and what data it works with. A Trigger defines how a function is invoked. Triggers have associated data, which is usually the payload that triggered the function.<\/p>\n

Input and output bindings <\/strong>provide a declarative way to connect to data from within your code. We can specify connection strings and other properties in function configuration. Bindings are optional and a function can have multiple inputs and output bindings.<\/p>\n

Using triggers and bindings, we can write code that is more generic and does not hardcode the details of the services with which it interacts. Data coming from services become input values for the function code.<\/p>\n

To output data to another service (such as creating\/updation of a new row in Azure Table Storage), use the return value of the method.<\/p>\n

Some of the input and output bindings are given below :<\/p>\n