add requestBase64 api

README.md

@@ -28,6 +28,17 @@ The api same as base64, but it's synchronous
 var data = base64Img.base64Sync('path/demo.png');
 ```
 
+### .requestBase64(url, callback)
+* {string} ``url`` required
+* {function} ``callback(err, res, body)`` required  
+Callback with http request
+```js
+var url = 'http://../demo.png';
+base64Img.requestBase64(url, function(err, res, body) {
+
+});
+```
+
 ### .img(data, destpath, name, callback)
 Convert image base64 data to image
 * {string} ``data`` required  

base64-img.js

@@ -1,5 +1,6 @@
 var fs = require('file-system');
 var path = require('path');
+var request = require('ajax-request');
 
 function base64(filename, data) {
   var extname = path.extname(filename).substr(1);
@@ -55,6 +56,29 @@ exports.base64Sync = function(filename) {
   return base64(filename, data);
 };
 
+/**
+ * @description
+ * Get base64 from url
+ * @example
+ * request.base64(
+ *   'http://webresource.c-ctrip.com/ResCRMOnline/R5/html5/images/57.png', 
+ *   function(err, res, body) {
+ * 
+ *   }
+ * );
+ */
+exports.requestBase64 = function(url, callback) {
+  request({
+    url: url,
+    isBuffer: true
+  }, function (err, res, body) {
+    if (err) return callback(err);
+
+    var data = 'data:' + res.headers['content-type'] + ';base64,' + body.toString('base64');
+    callback(err, res, data);
+  });
+};
+
 /**
  * @description
  * Convert image base64 data to img

package.json

@@ -1,6 +1,6 @@
 {
   "name": "base64-img",
-  "version": "1.0.1",
+  "version": "1.0.2",
   "description": "Convert img to base64, or convert base64 to img",
   "main": "base64-img.js",
   "scripts": {
@@ -23,6 +23,7 @@
   },
   "homepage": "https://github.com/douzi8/base64-img",
   "dependencies": {
+    "ajax-request": "^1.1.0",
     "file-system": "^2.1.0"
   },
   "devDependencies": {

test/index.js

@@ -52,5 +52,21 @@ describe('Test', function() {
       var filepath = base64Img.imgSync(data, getpath('dest'), '3');
        assert.equal('.jpg', path.extname(filepath));
     });
+
+    it('request', function(done) {
+      var url = 'http://webresource.c-ctrip.com/ResCRMOnline/R5/html5/images/57.png';
+      var demo = readFileSync('img/demo.png');
+      var data = base64Img.base64Sync(getpath('img/demo.png'));
+
+      base64Img.requestBase64(url, function(err, res, body) {
+        if (err) {
+          done();
+          return console.log(err);
+        }
+
+        assert.equal(body.substr(0, 10), data.substr(0, 10));
+        done();
+      });
+    });
   });
 });