buffer-type - npm Package Compare versions

Comparing version 0.0.1 to 0.0.2

History.md

 
+0.0.2 / 2014-05-04
+==================
+
+ * add webp detect
+
 0.0.1 / 2013-08-13 
@@ -3,0 +8,0 @@ ==================

lib/buffer-type.js

@@ -1,8 +0,12 @@
-/*!
+/**!
  * buffer-type - lib/buffer-type.js
- * Copyright(c) 2013 fengmk2 <[e-mail]>
+ *
+ * Copyright(c) fengmk2 and other contributors.
  * MIT Licensed
+ *
+ * Authors:
+ *   fengmk2 <[e-mail]> (http://fengmk2.github.com)
  */
 
-"use strict";
+'use strict';
 
@@ -15,3 +19,3 @@ /**
  * @see http://www.onicos.com/staff/iz/formats/gif.html
- * 
+ *
 GIF format
@@ -36,3 +40,3 @@
          1 bytes  <Trailer> (0x3b)
- * 
+ *
  */
@@ -43,3 +47,3 @@ var gif = function (buf) {
       buf[0] !== 0x47 || buf[1] !== 0x49 || buf[2] !== 0x46 ||
-      // "87a" or "89a" 
+      // "87a" or "89a"
       buf[3] !== 0x38 || (buf[4] !== 0x39 && buf[4] !== 0x37) || buf[5] !== 0x61) {
@@ -68,3 +72,3 @@ return;
 0A  A Unix-style line ending (LF) to detect Unix-DOS line ending conversion.
- * 
+ *
  */
@@ -112,3 +116,3 @@ var png = function (buf) {
  * @see http://blog.csdn.net/lpt19832003/article/details/1713718
- * 
+ *
 JPEG format
@@ -139,3 +143,3 @@
          1 byte  0xd9 (EOI) end-of-file
- * 
+ *
  */
@@ -145,3 +149,3 @@
   if (buf.length < 20 ||
-      // 0xff 0xd8(SOI) 
+      // 0xff 0xd8(SOI)
       buf[0] !== 0xff || buf[1] !== 0xd8 ||
@@ -165,3 +169,3 @@ // 0xff 0xe0(APP0)
   // var height = buf.readUInt16BE(16, true);
-  
+
   // DQT，Define Quantization Table，定义量化表
@@ -179,3 +183,3 @@ // *  标记代码                          2字节            固定值0xFFDB
   // 本标记段中，字段②可以重复出现，表示多个量化表，但最多只能出现4次。
-  
+
   // SOF0，Start of Frame，帧图像开始
@@ -194,3 +198,3 @@ // u  标记代码                   2字节     固定值0xFFC0
   //   ⑥颜色分量信息      颜色分量数×3字节（通常为9字节）
-  // a)         颜色分量ID                 1字节    
+  // a)         颜色分量ID                 1字节
   // b)        水平/垂直采样因子      1字节            高4位：水平采样因子
@@ -202,3 +206,3 @@ //                                                        低4位：垂直采样因子
   // 本标记段中，字段⑥应该重复出现，有多少个颜色分量（字段⑤），就出现多少次（一般为3次）。
-  
+
   // find SOF0
@@ -268,3 +272,3 @@ var offset = 20;
  54 (n-40) bytes  OS/2 new extentional fields??
- * 
+ *
  */
@@ -295,4 +299,43 @@
 
-var types = [gif, png, jpeg, bmp];
+// webp format: https://developers.google.com/speed/webp/docs/riff_container
+// WebP File Header
+//  0                   1                   2                   3
+//  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |      'R'      |      'I'      |      'F'      |      'F'      |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |                           File Size                           |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+// |      'W'      |      'E'      |      'B'      |      'P'      |
+// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+//
+// 'RIFF': 32 bits
+//   The ASCII characters 'R' 'I' 'F' 'F'.
+// File Size: 32 bits (uint32)
+//   The size of the file in bytes starting at offset 8.
+//   The maximum value of this field is 2^32 minus 10 bytes and
+//     thus the size of the whole file is at most 4GiB minus 2 bytes.
+// 'WEBP': 32 bits
+//   The ASCII characters 'W' 'E' 'B' 'P'.
+function webp(buf) {
+  if (buf.length < 12) {
+    return;
+  }
+  if (buf.slice(0, 4).toString() !== 'RIFF' || buf.slice(8, 12).toString() !== 'WEBP') {
+    return;
+  }
 
+  // uint32: A 32-bit, little-endian, unsigned integer.
+  // The file size in the header is the total size of the chunks that follow plus 4 bytes for the 'WEBP' FourCC.
+  var size = buf.readUInt32LE(4);
+
+  return {
+    type: 'image/webp',
+    extension: '.webp',
+    size: size + 8
+  };
+}
+
+var types = [gif, png, jpeg, bmp, webp];
+
 function detect(buf) {
@@ -302,3 +345,3 @@ if (!buf || !buf.length) {
   }
-  
+
   for (var i = 0; i < types.length; i++) {
@@ -305,0 +348,0 @@ var r = types[i](buf);

package.json

 {
   "name": "buffer-type",
-  "version": "0.0.1",
+  "version": "0.0.2",
   "description": "Detect content-type from Buffer data.",
   "main": "index.js",
   "scripts": {
-    "test": "make test-all",
-    "blanket": { 
+    "test": "make test-all"
+  },
+  "config": {
+    "blanket": {
       "pattern": "buffer-type/lib",
@@ -30,9 +32,14 @@ "data-cover-flags": {
   },
+  "homepage": "https://github.com/node-modules/buffer-type",
   "repository": {
     "type": "git",
-    "url": "git://github.com/fengmk2/buffer-type.git",
-    "web": "https://github.com/fengmk2/buffer-type"
+    "url": "git://github.com/node-modules/buffer-type.git",
+    "web": "https://github.com/node-modules/buffer-type"
   },
   "keywords": [
-    "buffer-type", "content-type", "buffer", "type", "filetype", "file extension", "buffer type"
+    "buffer-type",
+    "image-type",
+    "content-type", "buffer", "type",
+    "mime",
+    "filetype", "file extension", "buffer type"
   ],
@@ -39,0 +46,0 @@ "engines": {

README.md

 buffer-type
 =======
 
-[![Build Status](https://secure.travis-ci.org/fengmk2/buffer-type.png)](http://travis-ci.org/fengmk2/buffer-type) [![Coverage Status](https://coveralls.io/repos/fengmk2/buffer-type/badge.png)](https://coveralls.io/r/fengmk2/buffer-type) [![Build Status](https://drone.io/github.com/fengmk2/buffer-type/status.png)](https://drone.io/github.com/fengmk2/buffer-type/latest)
+[![Build Status](https://secure.travis-ci.org/node-modules/buffer-type.png)](http://travis-ci.org/node-modules/buffer-type)
 
-![logo](https://raw.github.com/fengmk2/buffer-type/master/logo.png)
+[![Coverage Status](https://coveralls.io/repos/node-modules/buffer-type/badge.png)](https://coveralls.io/r/node-modules/buffer-type)
 
+[![NPM](https://nodei.co/npm/buffer-type.png?downloads=true&stars=true)](https://nodei.co/npm/buffer-type/)
+
+![logo](https://raw.github.com/node-modules/buffer-type/master/logo.png)
+
 Detect content-type from Buffer data.
@@ -51,2 +55,6 @@
   * [√] .gif
+  * [√] .webp
+  * [ ] .svg
+  * [ ] .tif
+  * [ ] .psd
 * Tar
@@ -65,2 +73,3 @@ * [ ] .tar
   * [ ] .html
+  * [ ] .json
 * Media
@@ -74,3 +83,3 @@ * [ ] .mp3
 ```bash
-$ git summary 
+$ git summary
 
@@ -82,7 +91,7 @@ project  : buffer-type
  files    : 17
- authors  : 
+ authors  :
      5  fengmk2                 100.0%
 ```
 
-## License 
+## License
 
@@ -89,0 +98,0 @@ (The MIT License)

Fixed alerts

No website

Quality

Package does not have a website.

Found 1 instance in 1 package

Improved metrics

Total package byte prevSize

17232

increased by12.01%

Lines of code

310

increased by14.81%

Number of low quality alerts

1

decreased by-50%

Number of lines in readme file

116

increased by8.41%

No dependency changes