Express-Resize

Express middleware to resize images on the fly.

Installation

npm install --S express-resize

Usage

If you are using other middleware make sure to include express-resize before them!

var express = require('express');
var resize = require('express-resize');

var app = express();

app.use(resize);
app.use(express.static());

app.listen(3030);

Just put the full sized image in your content directory and request it with the width and or height parameters. For example:

• Need a small image for mobiles? get http://yoursite/image.jpg?width=150

• Need to crop an image to a square format for an avatar? get http://yoursite/avatar.jpg?width=100&height=100

Supported formats are: jpg, jpeg, png, gif, svg.

Todo

• Provide options for crop positioning

Tests

params

params should return an object with two keys: height, width

var req = {
    query: {
        height: 600,
        width: 600
    }
};
var result = util.params(req);
assert.equal(2, Object.keys(result).length);

params should return an object with the keys: height = 600, width = null

var req = {
    query: {
        height: 600,
        width: '6dsf00'
    }
};
var result = util.params(req);
assert.equal((Object.keys(result).length == 2),(result.width == null));

params should return an object with the keys: height = null, width = 600

var req = {
    query: {
        height: 0,
        width: 600
    }
};
var result = util.params(req);
assert.equal((Object.keys(result).length == 2),(result.height == null));

params should return null

var req = {
    query: {}
};
var result = util.params(req);
assert.equal(null, result);

relativePath

relativePath should return a path without leading slash

var path = '/Content/Images/car.jpeg';
var result = util.relativePath(path);
assert.equal(true, (result.charAt(0) !== '/'));

parseReqUrl

parseReqUrl return an array

var path = 'content/image.jpg';
var result = util.parseReqURL(path);
assert.equal("object", typeof(result));

parseReqUrl return an array with two keys

var path = 'content/image.jpg';
var result = util.parseReqURL(path);
assert.equal(2, result.length);

assetAvaialble

assetAvaialble should callback when asset is available

var path = 'tests/test.png';
util.assetAvailable(path, function (err) {
    if (err)
        assert.equal(true, false);
    assert.equal(true, true);
});

assetAvaialble should callback with error when asset is unavailable

var path = 'tests/test.jpg';
util.assetAvailable(path, function (err) {
    if (err)
        assert.equal(true, false);
    assert.equal(true, true);
});