# Node Image Downloader

A Node module for downloading image to disk from a given URL

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## Install

```sh
npm install --save image-downloader
```

## Options

- **url** (*required*) - the image URL to download
- **dest** (*required*) - the image destination. Can be a directory or a
  filename. If a directory is given, ID will automatically extract the image
  filename from `options.url` (see usage bellow)
- **extractFilename** - boolean indicating whether the image filename will be
  automatically extracted from `options.url` or not. Set to `false` to have
  `options.dest` without a file extension for example. (default: `true`)
- **headers** - HTTP headers (default: `{}`)
- **timeout** - milliseconds before a request times out
- **maxRedirects** - the maximum number of allowed redirects; if exceeded, an
  error will be emitted. (default: `21`)

For advanced options, see [Node.js `http.request()`'s options documentation](https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_http_request_url_options_callback)

## Usage

Download to a directory and save with the original filename

```js
const download = require('image-downloader');

const options = {
  url: 'http://someurl.com/image.jpg',
  dest: '/path/to/dest',               // will be saved to /path/to/dest/image.jpg
};

download.image(options)
  .then(({ filename }) => {
    console.log('Saved to', filename); // saved to /path/to/dest/image.jpg
  })
  .catch((err) => console.error(err));
```

Download to a directory and save with an another filename

```js
const download = require('image-downloader');

options = {
  url: 'http://someurl.com/image2.jpg',
  dest: '/path/to/dest/photo.jpg',     // will be saved to /path/to/dest/photo.jpg
};

download.image(options)
  .then(({ filename }) => {
    console.log('Saved to', filename); // saved to /path/to/dest/photo.jpg
  })
  .catch((err) => console.error(err));
```

Download with another filename without extension

```js
const download = require('image-downloader');

options = {
  url: 'http://someurl.com/image3.jpg',
  dest: '/path/to/dest/photo',         // will be saved to /path/to/dest/photo
  extractFilename: false,
};

download.image(options)
  .then(({ filename }) => {
    console.log('Saved to', filename), // saved to /path/to/dest/photo
  })
  .catch((err) => console.error(err));
```

## Development Setup

1. [Install Nix Package Manager](https://nixos.org/manual/nix/stable/installation/installing-binary.html)

2. [Install `direnv` with your OS package manager](https://direnv.net/docs/installation.html#from-system-packages)

3. [Hook it `direnv` into your shell](https://direnv.net/docs/hook.html)

4. At the top-level of your project run:

   ```sh
   direnv allow
   ```

   > The next time your launch your terminal and enter the top-level of your
   > project, `direnv` will check for changes.

## Contribute

Please follow [CONTRIBUTING.md](https://gitlab.com/demsking/image-downloader/blob/main/CONTRIBUTING.md).

## License

Under the MIT license. See [LICENSE](https://gitlab.com/demsking/image-downloader/blob/main/LICENSE) file for more details.