Azure Functions - HTTP Output Bindings

Introduction

HTTP Output Bindings allow your Azure Functions to send data to external HTTP endpoints. They are a core component of building integrations with other services and APIs.

Key Concepts

- Mapping Data: You map function input data to the HTTP request body. - Request Body Format: The format of the request body (JSON, XML, etc.) is defined in the binding configuration. - Custom Headers: You can set custom HTTP headers on the outgoing request.

Examples

Sending JSON Data to a REST API

This example shows how to send JSON data to a third-party REST API.

Function Code (Example):

                    
                        function main(req, res) {
                            let data = {
                                name: "John Doe",
                                age: 30
                            };
                            res.json(data);
                        }
                    
                

Explanation: The `res.json(data)` function automatically formats the `data` object as JSON and sends it as the response body with the correct Content-Type header.

Sending XML Data

Sending data in XML format.

Function Code (Example):

                    
                        function main(req, res) {
                            let data = {
                                name: "Jane Doe",
                                age: 25
                            };
                            res.json(data, { contentType: 'application/xml' });
                        }
                    
                

Configuration Options

Uri: Specifies the target URL of the HTTP request.
Method: Defines the HTTP method (GET, POST, PUT, DELETE, etc.).
Headers: Allows setting custom HTTP headers.
Body: The data to be sent in the request body.

Resources

HTTP Output Bindings