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