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Hybrid Rendering Architecture using Astro and Go Fiber

Published at

1/4/2025

Full Example of Hybrid Rendering Architecture using Astro and Go Fiber

Here's a step-by-step guide to creating a web application using the Hybrid Rendering Architecture with Astro and Go Fiber.

1. Set Up the Astro Project

Install Astro and create a new project:

   npm create astro@latest
   cd my-astro-site

Create a page in Astro:

Create src/pages/index.astro:

   ---
   export const prerender = true;
   ---

   <!DOCTYPE html>
   <html lang="en">
   <head>
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>{Astro.props.title}</title>
     <link rel="stylesheet" href="/assets/style.css">
   </head>
   <body>
     <h1>{Astro.props.title}</h1>
     <p>{Astro.props.message}</p>
     <script src="/assets/script.js"></script>
   </body>
   </html>

Add CSS and JS files:

Create src/assets/style.css:

   body {
     font-family: Arial, sans-serif;
     background-color: #f0f0f0;
     margin: 0;
     padding: 20px;
   }

Create src/assets/script.js:

   document.addEventListener('DOMContentLoaded', () => {
     console.log('Astro and Go Fiber working together!');
   });

Build the Astro project:

   npm run build

2. Set Up the Go Fiber Project

Create a new Go project and install dependencies:

   go mod init mysite
   go get github.com/gofiber/fiber/v2

Create the main Go file:

Create main.go:

   package main

   import (
       "log"
       "github.com/gofiber/fiber/v2"
       "path/filepath"
       "encoding/json"
       "io/ioutil"
       "bytes"
       "os/exec"
       "net/http"
   )

   // Function to render Astro template
   func renderAstroTemplate(templatePath string, data map[string]interface{}) (string, error) {
       cmd := exec.Command("astro", "build", "--input", templatePath)

       // Pass data to template via stdin
       jsonData, err := json.Marshal(data)
       if err != nil {
           return "", err
       }
       cmd.Stdin = bytes.NewBuffer(jsonData)

       output, err := cmd.CombinedOutput()
       if err != nil {
           return "", fmt.Errorf("failed to execute astro build: %s", string(output))
       }

       // Read generated file
       outputPath := filepath.Join("dist", "index.html")
       content, err := ioutil.ReadFile(outputPath)
       if err != nil {
           return "", err
       }

       return string(content), nil
   }

   func main() {
       app := fiber.New()

       // Serve static files from the dist directory
       app.Static("/", "./my-astro-site/dist")

       app.Get("/", func(c *fiber.Ctx) error {
           data := map[string]interface{}{
               "title": "My Astro Site",
               "message": "Welcome to my site built with Astro and Go Fiber!",
           }

           htmlContent, err := renderAstroTemplate("./my-astro-site/src/pages/index.astro", data)
           if err != nil {
               return c.Status(http.StatusInternalServerError).SendString(err.Error())
           }

           return c.Type("html").SendString(htmlContent)
       })

       log.Fatal(app.Listen(":3000"))
   }

3. Run the Application

Start the Go Fiber server:

   go run main.go

Access the website:

Open your browser and navigate to http://localhost:3000.

Summary

In this example, Astro handles the static site generation, creating optimized HTML, CSS, and JavaScript files. Go Fiber serves these static files and dynamically injects data into the templates, allowing for real-time data updates. This hybrid rendering architecture leverages the strengths of both technologies to create a performant and scalable web application.

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