08-27-周三_17-09-29

node_modules/image-size/Readme.md

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+[![Build Status](https://travis-ci.org/netroy/image-size.png?branch=master)](https://travis-ci.org/netroy/image-size)
+[![NPM Downloads](http://img.shields.io/npm/dm/image-size.svg)](https://npmjs.org/package/image-size)
+[![Gittip](http://img.shields.io/gittip/netroy.svg)](https://www.gittip.com/netroy/)
+
+[![Coverage Status](https://coveralls.io/repos/netroy/image-size/badge.png?branch=master)](https://coveralls.io/r/netroy/image-size?branch=master)
+[![Technical debt analysis](https://www.sidekickjs.com/r/netroy/image-size/status_badge.svg)](https://www.sidekickjs.com/r/netroy/image-size)
+[![Code Climate](https://codeclimate.com/github/netroy/image-size.png)](https://codeclimate.com/github/netroy/image-size)
+[![Dependency Status](https://gemnasium.com/netroy/image-size.png)](https://gemnasium.com/netroy/image-size)
+
+#### Instalation
+
+`npm install image-size`
+
+#### Usage
+
+```javascript
+var sizeOf = require('image-size');
+var dimensions = sizeOf('images/funny-cats.png');
+console.log(dimensions.width, dimensions.height);
+```
+
+##### Async version
+```javascript
+var sizeOf = require('image-size');
+sizeOf('images/funny-cats.png', function (err, dimensions) {
+  console.log(dimensions.width, dimensions.height);
+});
+```
+
+##### Using a url
+```javascript
+var url = require('url');
+var http = require('http');
+
+var sizeOf = require('image-size');
+
+var imgUrl = 'http://my-amazing-website.com/image.jpeg';
+var options = url.parse(imgUrl);
+
+http.get(options, function (response) {
+  var chunks = [];
+  response.on('data', function (chunk) {
+    chunks.push(chunk);
+  }).on('end', function() {
+    var buffer = Buffer.concat(chunks);
+    console.log(sizeOf(buffer));
+  });
+});
+```
+You can optionally check the buffer lengths & stop downloading the image after a few kilobytes.
+**You don't need to download the entire image**
+
+#### Supported formats
+* BMP
+* GIF
+* JPEG
+* PNG
+* PSD
+* TIFF
+* WebP
+* SVG
+
+##### Upcoming
+* SWF
+
+##### Credits
+not a direct port, but an attempt to have something like
+[dabble's imagesize](https://github.com/dabble/imagesize/blob/master/lib/image_size.rb) as a node module.
+
+##### [Contributors](Contributors.md)