HTTP Calls / Webhooks

Genezio provides an easy way to interact with third-party services or APIs using webhooks/HTTP methods.

With genezio decorators, you can set one or more of your methods to handle HTTP requests.

Use webhooks in your project

A webhook/HTTP method is declared in the same way as any other genezio method, but it needs to fulfill the following requirements to be considered a webhook/HTTP method:

• The method must be marked as http either using decorators or the genezio.yaml configuration file.
• The method must have only one parameter of type GenezioHttpRequest.
• The method must return a GenezioHttpResponse object.

info

Decorators are only supported in TypeScript, JavaScript and Go. If you are using any other supported language, you need to specify the method as a HTTP method in the genezio.yaml file.

Decorators (TS/JS)

http.ts

import { GenezioDeploy, GenezioMethod } from "@genezio/types";
import { GenezioHttpResponse, GenezioHttpRequest } from "@genezio/types";

@GenezioDeploy()
export class HttpServer {
    @GenezioMethod({ type: "http" })
    handleSimplePlainRequest(request: GenezioHttpRequest): GenezioHttpResponse {
        console.log(`Request received with a simple text ${request.body}!`);

        // insert your code here

        const response: GenezioHttpResponse = {
            body: request.body,
            headers: { "content-type": "text/html" },
            statusCode: "200",
        };

        return response;
    }
}

note

For TypeScript and JavaScript projects, using decorators is the recommended way to declare HTTP methods, but you can also use the genezio.yaml file to declare the HTTP methods.

The genezio.yaml is considered the source of truth for the project. If you declare two different types for the same method in the genezio.yaml and in the code, the type declared in the configuration file will be used.

Go

http.go

package httpHandler

import (
    "fmt"
    genezio_types "github.com/Genez-io/genezio_types"
)

// genezio: deploy
type HttpServer struct {}

func New() HttpServer {
    return HttpServer{}
}

// genezio: http
func (s HttpServer) HandleSimplePlainRequest(request genezio_types.GenezioHttpRequest) *genezio_types.GenezioHttpResponse {
    fmt.Println("Request received with a simple text", request.Body, "!")

    // insert your code here

    response := GenezioHttpResponse{
        Body:       request.Body,
        Headers:    map[string]string{"content-type": "text/html"},
        StatusCode: "200",
    }

    return response
}

note

For Go projects, using decorators is the recommended way to declare HTTP methods, but you can also use the genezio.yaml file to declare the HTTP methods.

The genezio.yaml is considered the source of truth for the project. If you declare two different types for the same method in the genezio.yaml and in the code, the type declared in the configuration file will be used.

Configuration File (All supported languages)

genezio.yaml

name: http-example
yamlVersion: 2
backend:
  path: .
  language:
    name: go
  classes:
    # You need to identify the class by the source file
    - path: http.go
      methods:
        # You need to identify the method by the name
        - name: HandleSimplePlainRequest
          # Specify the `http` method type
          type: http

Deploy your service

To deploy your newly created class to the genezio infrastructure, use the following command:

genezio deploy

Usually after the deployment, you need to provide the webhook URLs to the third-party APIs or services you want to connect to.

There are 2 places where you can find the webhook URLs for your deployed methods:

1. In the genezio dashboard, on the corresponding class page:

2. The HTTP endpoints will be shown in your terminal after executing genezio deploy:

Terminal

$ genezio deploy

Deploying your backend project to the genezio infrastructure...

Your backend code was deployed and the SDK was successfully generated

HTTP Methods Deployed:
  - HttpServer.handleSimplePlainRequest: https://<lambdaUrl>/HttpServer/handleSimplePlainRequest

App Dashboard URL: https://app.genez.io/project/<projectId>/<projectEnvId>

HTTP types

GenezioHttpRequest

Properties

• headers - required: A dictionary that contains the headers.
• http - required: An object that has the following properties:
  • method: The HTTP method.
  • path: The path of the request.
  • protocol: The HTTP version used.
  • userAgent: The request's user agent.
  • sourceIp: The IP of the source.
• queryStringParameters - optional: A dictionary that contains the query parameters.
• timeEpoch - required: Timestamp when the request was made.
• rawBody - required: A string with the unparsed body
• body - required: An object that represents the request's body. If the value is JSON, the value of this variable is a JSON object. If the value is binary, the value of this variable is a Buffer. If the value is text, the value of this variable is also text.

GenezioHttpResponse

Properties

• body - required: An object that represents the response's body. The type of this variable can be Object, String, or Buffer.
• headers - optional: A dictionary that contains the headers.
• statusCode - required: The status code of the response.
• isBase64Encoded - optional: This flag can be set to true or false to indicate if the body is base64 encoded. This flag is optional and can be omitted.

Examples using webhooks

For more details, check out the webhooks examples for JavaScript and TypeScript.

Next Steps

Also, you can find more details on deploying the backend and frontend here:

• Backend Deployment
• Frontend Deployment

Now you are ready for some more advanced use cases:

• Web3 Application
• ChatGPT App
• Shopping Cart Implementation
• Integrate Stripe Payments