The Art of File Routing
Tags: totaljs, webdev, node, javascript
Published: 2023-12-11 23:31:44

In the world of web development, efficiently handling custom files like images, documents, and uploads is a challenge that every developer faces. Total.js, a cutting-edge Node.js framework, offers a game-changing solution with its `ROUTE(FILE ...)` functionality. In this article, we'll delve into the intricacies of handling custom files in Total.js and highlight its advantages over common approaches used in other popular web frameworks.

## Embracing the Art of Uploading Files

File uploading is a pivotal aspect of modern web applications, but it can often be a hassle to manage. Total.js streamlines this process using the `ROUTE('POST /upload/', myupload, ['upload'], 1024)` method. Let's dissect this method with an illustrative example:

```javascript
// File: /controllers/upload.js

exports.install = function() {
    ROUTE('POST /upload/', myupload, ['upload'], 1024); // 1024 kB = max. request size
};

function myupload() {
    var self = this;

    // The "self.files" array encapsulates HttpFile objects
    // Each HttpFile object represents an uploaded file
    console.log(self.files);

    // Implement your custom processing logic here

    self.success(); // Signal successful processing
}
```

In this snippet, the `myupload` function leaps into action when a `POST` request targets the `/upload/` route. The `'upload'` flag hints that this route handles file uploads, while `1024` determines the maximum request size in kilobytes.

## The Art of File Routing

Total.js reinvents the concept of file routing by optimizing performance and dynamically processing static files. This capability finds its expression through the `ROUTE('FILE ...')` syntax.

### Empowering All Files in a Directory

Total.js unleashes a new paradigm for managing files within specific directories:

```javascript
exports.install = function() {
    ROUTE('FILE /documents/*.*', handle_documents);
    ROUTE('FILE /images/*.jpg',  handle_images);
};

function handle_documents(req, res) {
    // Your genius in handling document files here
    res.file('/path/to/file.pdf'); // Deliver the requested file
}

function handle_images(req, res) {
    // Unleash your magic with image files
    // Modify or process the image as needed
    // Then, use res.file() to serve the customized image
}
```

In this excerpt, the `handle_documents` and `handle_images` functions spring to life when requests for document and image files are sent. The `res.file()` method plays the role of delivering the desired files to the awaiting client.

### Resizing Images: A Total Transformation

Total.js doesn't stop at traditional file handling; it redefines the game with its image resizing prowess. The `RESIZE(...)` function is a star player in this spectacle:

```javascript
exports.install = function() {
    RESIZE('/gallery/*.jpg', resize);
};

function resize(image) {
    image.resize(120, 120); // Transform the image to 120x120 pixels
    image.quality(90);      // Set image quality at 90%
    image.minify();         // Shrink the image size
    // The modified, sleek image rests in the temporary directory
}
```

In this revelation, the `resize` function takes the stage when a `.jpg` image request dances into the `/gallery/` realm. With finesse, it resizes, optimizes quality, and miniaturizes the image. The revamped image then takes its place in the temporary directory, ready for delivery.

## Unveiling the Revolution

Total.js stands as a titan among web frameworks, delivering an unmatched experience in handling custom files. Its innovative approach redefines how we upload, route, and manipulate files. By exploiting the `ROUTE(FILE ...)` and `RESIZE(...)` methods, developers are empowered to efficiently process and present diverse files. Total.js isn't just a framework; it's a revolution that takes file handling to a level previously unseen in the web development landscape.