道场1.9.3 XHR VS IFRAME [英] Dojo 1.9.3 xhr vs iframe
问题描述
要使用什么真的吗?我有一个请求/ XHR模块,不能发布的multipart / form-data的(两个文本字段和文件上传)。当使用IFRAME中,我可以张贴没有问题的形式。我想,虽然使用XHR。 iframe的另一方面,不能使用,因为我将无法读取响应主体。是否XHR支持多部分/换数据?是否有另一种替代方案来执行这个简单的任务:发布的文件及两个名字,并得到一个JSONObject的响应。我读文件中的部分。
**************道场code ****** *********************
<脚本> dojoConfig = {parseOnLoad:真}< / SCRIPT>
<脚本的src ='道场释放-1.9.3 /道场/ dojo.js中'>< / SCRIPT>
< /头>
<体类=克拉罗>
<表格数据道场型=的dijit /表/表ID =myForm的数据道场-ID =myForm的
ENCTYPE =多部分/表单数据行动=的方法=>
<标签=名字>名字< /标签><输入数据dojo-
TYPE =的dijit /表格/ ValidationTextBox类型=文本名称=FNAME/>
<标签=姓氏与GT;名字:< /标签><输入数据dojo-
TYPE =的dijit /表格/ ValidationTextBox类型=文本名称=L-NAME/>
<标签=文件名>证书上载:LT; /标签><输入类型=文件名称=文件名/>
<按钮式=按钮ID =startButton>启动< /按钮> < /形式GT;
<脚本>
要求([道场/请求/ XHR,道场/ DOM,道场/ DOM形式,道场/ DOM的结构,
道场/ JSON,道场/上,道场/ domready中!]
功能(XHR,DOM,domForm,domConst,JSON,上){
在(dom.byId(startButton),点击,函数(){
VAR数据= domForm.toObject(myForm会);
XHR(ADDUSER,{
数据:数据,
方法:后,
handleAs:JSON
}),然后(函数(CERT){
(接收到的数据!)警告;
},功能(错误){
警报(数据否认了!!!);
警报(ERR); }); }); });
****** Servlet的code *********** *************
保护无效的doPost(HttpServletRequest的要求,
HttpServletResponse的响应)抛出了ServletException,IOException异常{
字符串名字=的request.getParameter(FNAME); //检索<输入类型=文本
NAME =描述>
字符串名字=的request.getParameter(L-NAME); //检索<输入类型=文本
NAME =描述>
部分CERTFILE = request.getPart(文件名); //检索<输入类型=文件
NAME =文件>
字符串Certname = getFilename(CERTFILE); //调用getFilename方法
InputStream的Certcontent = Certfile.getInputStream();
的BufferedReader在=新的BufferedReader(新的InputStreamReader(Certcontent));
我想出了一个良好的工作,因为周围的人似乎知道解决这个。
任务:所需张贴的形式到3.0的servlet使用的multipart / form-data的是具有文本字段和全部在AJAX方法的文件。
道场请求方法短期下跌最mehtods,有时无法与AJAX工作。他们将需要一个新的页面。
解决方法:我加入一个iframe标签,并改变了形式为目标的iframe中。 解决了!
< IFRAME ID =uploadTrgNAME =uploadTrg高度=0WIDTH =0>< / IFRAME>
现在Ajax和文本和文件的形式工作。
What to use really?! I have a request/xhr module which cannot post a multipart/form-data (Two text fields and a file upload). When using Iframe I can post the form with no problem. I would like to use xhr though. Iframe on the other hand cannot be used because I won't be able to read the response body. Does xhr support multipart/for-data? Is there another alternative to perform this simple task: post a file and two names and get a JSONObject response. I'm reading the file in parts.
*************************** Dojo Code ***************************
<script>dojoConfig = {parseOnLoad: true}</script>
<script src='dojo-release-1.9.3/dojo/dojo.js'></script>
</head>
<body class="claro">
<form data-dojo-type="dijit/form/Form" id="myForm" data-dojo-id="myForm"
encType="multipart/form-data" action="" method="">
<label for="firstname">FirstName</label><input data-dojo-
type="dijit/form/ValidationTextBox" type="text" name="fname"/>
<label for="lastname">LastName:</label><input data-dojo-
type="dijit/form/ValidationTextBox" type="text" name="lname" />
<label for="fileName">Certificate Upload:</label><input type="file" name="fileName" />
<button type="button" id="startButton">Start</button> </form>
<script>
require(["dojo/request/xhr", "dojo/dom", "dojo/dom-form", "dojo/dom-construct",
"dojo/json", "dojo/on", "dojo/domReady!"],
function(xhr, dom, domForm, domConst, JSON, on){
on(dom.byId("startButton"), "click", function(){
var data = domForm.toObject("myForm");
xhr("addUser",{
data: data,
method:"post",
handleAs:"json"
}).then(function(cert){
alert("data received!");
}, function(err){
alert("data denied!!!");
alert(err); }); }); });
********************* Servlet Code ************************
protected void doPost(HttpServletRequest request,
HttpServletResponse response) throws ServletException, IOException {
String FirstName = request.getParameter("fname"); // Retrieves <input type="text"
name="description">
String LastName = request.getParameter("lname"); // Retrieves <input type="text"
name="description">
Part Certfile = request.getPart("fileName"); // Retrieves <input type="file"
name="file">
String Certname = getFilename(Certfile); // Calls getFilename method
InputStream Certcontent = Certfile.getInputStream();
BufferedReader in = new BufferedReader(new InputStreamReader(Certcontent));
I figured out a good work around since nobody seemed to know the solution to this.
Task: Needed to post a form to a 3.0 servlet using multipart/form-data that had text fields and a file all within the AJAX method.
Dojo request methods fell short on most mehtods and sometimes couldn't work with AJAX. They would require a new page.
Solution: I added in an iframe tag and changed the form to target the iframe. SOLVED!
<iframe id="uploadTrg" name="uploadTrg" height="0" width="0"></iframe>
Now Ajax and form with text and file are working.
这篇关于道场1.9.3 XHR VS IFRAME的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!