img-dl

Downloade image(s), by command or programmatically. The alternative for image-downloader package (see the features).

Features

| Features | img-dl | image-downloader | | --------------------------- | :--------: | :--------------------: | | Single download | ✅ | ✅ | | Bulk download | ✅ | ❌ | | CLI | ✅ | ❌ | | Custom filename | ✅ | ✅ | | Custom extension | ✅ | ❌ | | Request timeout | ✅ | ✅ | | Retry failed request | ✅ | ❌ | | Abort request | ✅ | ❌ | | Increment mode (in CLI) | ✅ | ❌ | | Overwrite prevention | ✅ | ❌ |

Increment mode

Download images with an url that contains {i} placeholder for the index, and specify the start and end index.

Overwrite prevention

To prevent overwriting, (n) will be appended to the name of the new file if the file with the same name already exists.

The number will be incremented until the file name is unique in the directory, starting from 1 (e.g. image (1).jpg, image (2).jpg, etc.).

Image with different extension will be considered as different file, so it will not be appended with (n). For example, image.jpg and image.png will not be considered as the same file.

This feature will work for both single and bulk download.

Prerequisites

• Node.js 20.9 or later
• npm 10 or later

Installation

img-dl can be installed in the global scope (if you'd like to have it available and use it on the whole system) or locally for a specific package (especially if you'd like to use it programmatically):

Install globally:

npm install -g img-dl

Install locally:

npm install img-dl

Usage

Command line

Access the help page with imgdl --help

Download image(s), by command or programmatically

USAGE
  $ imgdl <url> ... [OPTIONS]

PARAMETERS
  url   The URL of the image to download. Provide multiple URLs to download multiple images.
        In increment mode, the URL must contain {i} placeholder for the index,
        only one URL is allowed, and the '--end' is required.

OPTIONS
  -d, --dir=<path>          The output directory. Default: current working directory
      --end=<number>        The end index for increment mode. Default: 0
  -e, --ext=<ext>           The file extension. Default: original extension or jpg
  -h, --help                Show this help message
  -H, --header=<header>     The header to send with the request. Can be used multiple times
  -i, --increment           Enable increment mode. Default: false
      --interval=<number>   The interval between each batch of requests in milliseconds
  -n, --name=<filename>     The filename. If not specified, the original filename will be used. Default: 'image'
      --max-retry=<number>  Set the maximum number of times to retry the request if it fails
      --silent              Disable logging
      --start=<number>      The start index for increment mode. Default: 0
      --step=<number>       The number of requests to make at the same time. Default: 5
  -t, --timeout=<number>    Set timeout for each request in milliseconds
  -v, --version             Show the version number

EXAMPLES
  $ imgdl https://example.com/image.jpg
  $ imgdl https://example.com/image.jpg --dir=images --name=example --ext=png
  $ imgdl https://example.com/image.jpg --silent
  $ imgdl https://example.com/image.jpg https://example.com/image2.webp
  $ imgdl https://example.com/image-{i}.jpg --increment --start=1 --end=10
  $ imgdl https://example.com/image.jpg --header="User-Agent: Mozilla/5.0" --header="Cookie: foo=bar"

Simple download

imgdl https://example.com/image.jpg

Bulk download

imgdl https://example.com/image.jpg https://example.com/image2.jpg

Bulk download with increment mode

imgdl https://example.com/image-{i}.jpg --increment --start=1 --end=10

Programmatically

Simple download

import imgdl from 'img-dl';

const image = await new Promise((resolve, reject) => {
  imgdl('https://example.com/image.jpg', {
    onSuccess: resolve,
    onError: reject,
  });
});
console.log(image);
/*
{
  url: {
    href: 'https://example.com/image.jpg',
    origin: 'https://example.com',
    protocol: 'https:',
    pathname: '/image.jpg',
    // ...
  },
  name: 'image',
  extension: 'jpg',
  directory: '/path/to/current/working/directory',
  originalName: 'image',
  originalExtension: 'jpg',
  path: '/path/to/current/working/directory/image.jpg',
}
*/

Bulk download

import imgdl from 'img-dl';

const urls = [
  'https://example.com/image.jpg',
  'https://example.com/image2.jpg',
];

await imgdl(urls, {
  onSuccess: (image) => {
    // Do something with the downloaded image
    console.log(image);
  },
  onError: (error, url) => {
    // Do something when the image fails to download
    console.error(`Failed to download ${url}: ${error.message}`);
  },
});

console.log('Download completed');

Bulk download with specific options

import imgdl from 'img-dl';

const options = {
  // Set default image options for all images
  name: 'avatar',
  extension: 'png',

  // Another options
  onSuccess: (image) => {
    console.log(`Downloaded ${image.name}.${image.extension}`);
  },
  onError: (error, url) => {
    console.error(`Failed to download ${url}: ${error.message}`);
  },
  timeout: 5000,
};

await imgdl(
  // Provide array of URLs with specific options
  [
    { url: 'http://example.com/image.jpg', name: 'myavatar' }, // Will be saved as `myavatar.png`
    { url: 'http://example.com/image.jpg', extension: 'webp' }, // Will be saved as `avatar.webp`
    { url: 'http://example.com/image2.jpg', directory: 'avatars' }, // Will be saved as `avatar.png` in `avatars` directory
  ],
  options,
);

API

imgdl(url, ?options)

Returns: Promise<void>

Download image(s) from the given URL(s).

url

Type: string | (string | ({ url: string } & ImageOptions))[] Required: true

The URL(s) of the image(s) to download. Required.

If the url is a string, it will download a single image.

If the url is an array, it will download multiple images.

• Each item in the array can be a URL in string or an object containing the URL and the image options.
• This URL-level options will override the function-level options, the image options provided in the second argument (see options).

options

Type: Options Required: false

directory

Type: string Default: process.cwd()

The output directory.

extension

Type: string Default: 'jpg'

The image extension. The extension must be any of sharp supported formats. If not specified, the original extension will be used.

If the original extension is not available, 'jpg' will be used.

headers

Type: Record<string, string | string[] | undefined> Default: undefined

The headers to send with the request.

interval

Type: number Default: 100

The interval between each batch of requests in milliseconds when downloading multiple images.

name

Type: string Default: 'image'

The filename. If not specified, the original filename will be used. If the original filename is not available, 'image' will be used.

maxRetry

Type: number Default: 2

Set the maximum number of times to retry the request if it fails.

onSuccess

Type: (image: Image) => void Default: undefined

The callback function to be called when the image is successfully downloaded.

Image is an object containing the information of the downloaded image. Image has the following properties:

• url: The instance of URL class of the image. See URL Class.
• originalName: The original name of the image if available. Default: undefined.
• originalExtension: The original extension of the image if available. Default: undefined.
• name: The user-defined name of the image. If not specified and the original name is available, the original name will be used. If the original name is not available, 'image' will be used.
• extension: The user-defined extension of the image. If not specified and the original extension is available, the original extension will be used. If the original extension is not available, 'jpg' will be used.
• directory: The output directory of the image.
• path: The path of the downloaded image.

onError

Type: (error: Error, url: string) => void Default: undefined

The callback function to be called when the image fails to download.

signal

Type: AbortSignal Default: undefined

The signal to abort the request.

step

Type: number Default: 5

The number of requests to make at the same time when downloading multiple images.

timeout

Type: number Default: undefined

Set timeout for each request in milliseconds.

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