plupload 如何控制最小宽度和文件类型及跨域

直接上代码

plupload.addFileFilter('min_width', function (maxwidth, file, cb) {
        var self = this, img = new o.Image(); 
        function finalize(result) {
            // cleanup
            img.destroy();
            img = null;

            // if rule has been violated in one way or another, trigger an error
            if (!result) {
                self.trigger('Error', {
                    code: plupload.IMAGE_DIMENSIONS_ERROR,
                    message: "图片宽度不能小于" + maxwidth + "px",
                    file: file
                });
            }
            cb(result);
        }
        img.onload = function () {
            // check if resolution cap is not exceeded
            finalize(img.width >= maxwidth);
        };
        img.onerror = function () {
            finalize(false);
        };
        img.load(file.getSource());
    });
    plupload.addFileFilter('filetype', function (filetype, file, cb) {
        var self = this, img = new o.Image();
        function finalize(result) {
            // cleanup
            img.destroy();
            img = null;

            // if rule has been violated in one way or another, trigger an error
            if (!result) {
                self.trigger('Error', {
                    code: plupload.IMAGE_DIMENSIONS_ERROR,
                    message: "您上传的图片格式是" + file.type + ",只能上传jpg图片",
                    file: file
                });
            }
            cb(result);
        }
        img.onload = function () {
            // check if resolution cap is not exceeded
            var type = file.type; 
            type = type.replace("image/", ""); 
            finalize(filetype.indexOf(type) > 0);  
        };
        img.onerror = function () {
            finalize(false);
        };
        img.load(file.getSource()); 
    });


    var uploader = new plupload.Uploader({//创建实例的构造方法
        browse_button: 'fileinput-button',
        runtimes: 'html5,flash,silverlight,html4', //上传插件初始化选用那种方式的优先级顺序 
        url: "/common/ImageUp", //远程上传地址
        max_file_size: '20mb',
        chunk_size: '500kb', 
        filters:  
           { title: "Image files", filetype: "jpg,jpeg", min_ 600 }
        ,
        flash_swf_url: '/Scripts/plupload-2.1.9/Moxie.swf', 
    });

    uploader.init();

参考文章：

http://stackoverflow.com/questions/14091505/control-image-width-and-height-when-upload-image

2.跨域

在iis7下web.config配置，实际配置时，指定具体的域名，防止被黑客入侵

<?xml version="1.0" encoding="utf-8"?>
<configuration>
 <system.webServer>
   <httpProtocol>
     <customHeaders>
       <add name="Access-Control-Allow-Origin" value="*" />
     </customHeaders>
   </httpProtocol>
 </system.webServer>
</configuration>

3.php怎么跨域

在文件头部加上  header( 'Access-Control-Allow-Origin:http://abc.com' );

如果在iis下不要添加，如2配置即可

跨域可能用的路径

//获取当前的域名:  
echo $_SERVER['SERVER_NAME'];  
//获取来源网址,即点击来到本页的上页网址  
echo $_SERVER["HTTP_REFERER"];  
$_SERVER['REQUEST_URI'];//获取当前域名的后缀  
$_SERVER['HTTP_HOST'];//获取当前域名  
dirname(__FILE__);//获取当前文件的物理路径  
dirname(__FILE__)."/../";//获取当前文件的上一级物理路径