ajaxfileupload上传文件出现SyntaxError:unexpected token <错误

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function ajaxFileUpload() { 
       
  $.ajaxFileUpload 
    
      
        url: uri, 
        secureuri: false
        fileElementId: 'upFile'
        dataType: 'content', //这里修改为content 
               
        success: function (data, status) { 
          alert(data); 
        }, 
                   
        error: function (data, status, e) { 
           alert(e); 
        
      
    
}

  结果返回的json数据如猜测,json数据被包含在一个<pre></pre>的标签中.

 

网上查了下原因,是因为Server端的Response上加上了contentType="application/json"。但有时后端这么做是必须的,

所以修改ajaxFileUpload源码,将<pre></pre>标签去掉,如下:

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uploadHttpData: function( r, type ) { 
        var data = !type; 
        data = type == "xml" || data ? r.responseXML : r.responseText; 
        // If the type is "script", eval it in global context 
        if ( type == "script"
            jQuery.globalEval( data ); 
        // Get the JavaScript object, if JSON is used. 
        if ( type == "json" ) { 
             ////////////以下为新增代码/////////////// 
             data = r.responseText; 
             var start = data.indexOf(">"); 
             if(start != -1) { 
               var end = data.indexOf("<", start + 1); 
               if(end != -1) { 
                 data = data.substring(start + 1, end); 
                
             
              ///////////以上为新增代码/////////////// 
              eval( "data = " + data); 
        
        // evaluate scripts within html 
        if ( type == "html"
            jQuery("<div>").html(data).evalScripts(); 
   
        return data; 
    }

  或者是在返回的“content”类型数据后

 

 

得到 JSON 数据

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