node-image-size-scanner

For a given URL, report image file sizes and paths sorted by decreasing size. Optionally specify byte threshold value to report on. Formatted output or json output. Follows redirects. Reports missing or unreachable images

Installation

npm install -g node-image-size-scanner

Usage

Command Line

$ image_check
Usage: image_check -u URL [-b MIN_BYTES_TO_ALERT_ON] [-j|-json] [-i|-ignore-errors]
Ex: image_check -u http://www.google.com -b 1k

Formatted Output

$ image_check -u http://www.google.com -b 1k
Image files >1.00 kB (1024 bytes)
    8.23 kB https://www.google.com/images/srpr/logo9w.png
    1.83 kB https://www.google.com/images/icons/product/chrome-48.png

JSON output

$ image_check -u https://www.google.com -b 1k -j | json
{
  "url": "https://www.google.com",
  "byte_threshold": 1024,
  "images": [
    {
      "url": "https://www.google.com/images/srpr/logo9w.png",
      "bytes": 8228
    },
    {
      "url": "https://www.google.com/images/icons/product/chrome-48.png",
      "bytes": 1834
    }
  ]
}

Module

See the examples directory.

params

• byte_threshold: Integer. The number of bytes that an image has to exceed in order to be reported
• ignore_image_errors: Boolean. Do not report images that cannot be sized. (404s, etc)

Promises Example

var NodeImageSizeScanner = require('../index');
 
var options = {
    log_level : 'err' // err, info, debug, off
};
 
var scanner = new NodeImageSizeScanner(options);
 
var runtime_options = {
    url             : 'http://www.nyt.com',
    byte_threshold  : '5k',
};
 
scanner.check(runtime_options)
.then(function(json){
    console.log(json);
}).
catch(function(err){
    console.error(err);
});

Async Example

var NodeImageSizeScanner = require('../index');
 
var options = {
    log_level : 'err' // err, info, debug, off
};
 
var scanner = new NodeImageSizeScanner(options);
 
var runtime_options = {
    url             : 'http://www.nyt.com',
    byte_threshold  : '5k',
};
 
scanner.checkAsync(runtime_options, function(err, json){
    if (err) {
        return console.error(err);
    }
    console.log(json);
});

Tests

npm test

Release Notes

1.0.7

• added ignore_image_errors param to skip reporting of images that can't be sized

1.0.3

• 1k now converts to 1024 bytes

1.0.2

• json output is now url instead of redundant image_url

1.0.0

• Converted to being a true module using Promises
• Added support for reporting 404 errors for missing images
• Added examples
• Added unit tests

0.1.0

• Switched to request module to gain redirect following