您的位置:首页 > 其它

ajaxFileUpload插件上传文件

2013-11-19 17:55 218 查看
Html代码







<table id="deploy_application" class="bordered-table">

<tr>

<td id="application_file">

<input id="file_field" type="file" name="application" size="20" />

</td>

<td id="application_submit">

<input id="submit_button" type="submit" value="Upload" onclick="uploadFile()" />

</td>

</tr>

</table>

[html] view
plaincopyprint?

<table id="deploy_application" class="bordered-table">

<tr>

<td id="application_file">

<input id="file_field" type="file" name="application" size="20" />

</td>

<td id="application_submit">

<input id="submit_button" type="submit" value="Upload" onclick="uploadFile()" />

</td>

</tr>

</table>

最近在使用ajaxFileUpload插件做文件上传时,后端返回json格式的数据,js代码如下:

Js代码







function ajaxFileUpload() {

$.ajaxFileUpload

(

{

url: '/upload',

secureuri: false,

fileElementId: 'file_field',

dataType: 'json', //这里选择了json

success: function (data, status) {

alert(data);

},

error: function (data, status, e) {

alert(e);

}

}

)

}

[js] view
plaincopyprint?

function ajaxFileUpload() {

$.ajaxFileUpload

(

{

url: '/upload',

secureuri: false,

fileElementId: 'file_field',

dataType: 'json', //这里选择了json

success: function (data, status) {

alert(data);

},

error: function (data, status, e) {

alert(e);

}

}

)

}

结果在chrome和FireFox浏览器出现如下错误:



先在网上找了下解决办法,stackoverflow上有说修改ajaxFileUpload源码的方法,试了下,不能用,问题依旧,只能自己排查下原因了。从错误提示上看有点像是json数据中出现了<(尖括号),为了看到json数据,将js修改如下:

Js代码







function ajaxFileUpload() {

$.ajaxFileUpload

(

{

url: '/upload',

secureuri: false,

fileElementId: 'file_field',

dataType: 'content', //这里修改为content

success: function (data, status) {

alert(data);

},

error: function (data, status, e) {

alert(e);

}

}

)

}

[js] view
plaincopyprint?

function ajaxFileUpload() {

$.ajaxFileUpload

(

{

url: '/upload',

secureuri: false,

fileElementId: 'file_field',

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,如下图:



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:

Js代码







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;

}

[js] view
plaincopyprint?

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;

}

至此,大工告成,ajaxFileUpload的dataType正常使用json。

原文地址;http://liwx2000.iteye.com/blog/1540321
内容来自用户分享和网络整理,不保证内容的准确性,如有侵权内容,可联系管理员处理 点击这里给我发消息
标签: