在Google App Engine上使用jQuery处理json表单 [英] Handling json Form with jQuery on Google App Engine
问题描述
我在使用GAE python 2.7编写jQuery时遇到了一些问题。 主要问题是jQuery无法捕获服务器返回的json数据。
一个简单的注释表单，没有什么特别的：
< form action =/ postcomment /method =postid =commentform>
< input type =textname =authorid =authoronfocus =if（this.value =='Name：（required）'）this.value =''; onblur =if（this.value ==''）this.value ='Name：（required）'; {％if name％} value ={{name}}{％else％} value =Name：（required）{％endif％} size =22tabindex =1aria-required ='true '/>
< input type =textname =emailid =emailonfocus =if（this.value =='E-Mail：（required）'）this.value =''; onblur =if（this.value ==''）this.value ='电子邮件：（必填）'; {％email％} value ={{email}}{％else％} value =电子邮件：（必填）{％endif％} size =22tabindex =2aria-required = 'true'/>
< input name =submittype =submitid =submittabindex =4value =Submit/>
< / form>
我的jQuery代码（只是使结构更简单）：
$（＃submit）。click（function（）{
$ .ajax（{
dataType：'json'，
beforeSubmit：function（）{
}，
timeout：60000，
error：function（request，error）{
}，
success：function（data ）{
var obj = jQuery.parseJSON（data）;
// blah blah ...
} // End success
}）; //结束ajax方法
}）;
在服务器端：
class PostComment（BaseHandler）：
def post（self）：
self.response.headers ['Content-Type'] =application / json
response = {'errorcode'：0}
self.response.out.write（json.dumps（response））
结果是：
我点击submit按钮后，My Firefox 3.6浏览器显示：有application / json文件，你想用哪个工具打开它？ / p>
我期待jQuery能够捕获这个'json'数据并处理它。但它没有发生。
我相信我几乎在那里，但有些地方是错误的。 / div>
您需要取消表单的默认操作，即提交（取消所有正在运行的JavaScript AJAX查询）：
$（＃submit）。click（function（）{
$ .ajax（{
dataType：'json'，
beforeSubmit：function（）{
}，
超时：60000，
错误：函数（请求，错误）{
}，
成功：函数（数据）{
var obj = jQuery.parseJSON（data）;
// blah blah ...
} // End success
}）; //结束ajax方法
返回false; //取消默认行动。
}）;
通过从Click处理程序返回 false 浏览器将数据提交给 action 属性中指定的URL的正常表单操作未被执行。
I am having some problems with making jQuery work on GAE python 2.7 . The main problem is jQuery cant catch the json data returned by the server.
A simple comment form with nothing special:
<form action="/postcomment/" method="post" id="commentform">
<input type="text" name="author" id="author" onfocus="if(this.value=='Name: (required)') this.value='';" onblur="if(this.value=='') this.value='Name: (required)';" {% if name %}value="{{ name }}"{% else %}value="Name: (required)"{% endif %} size="22" tabindex="1" aria-required='true' />
<input type="text" name="email" id="email" onfocus="if(this.value=='E-Mail: (required)') this.value='';" onblur="if(this.value=='') this.value='E-Mail: (required)';" {% if email %}value="{{ email }}"{% else %}value="E-Mail: (required)"{% endif %} size="22" tabindex="2" aria-required='true' />
<textarea name="comment" id="comment" cols="100%" rows="10" tabindex="3"></textarea>
<input name="submit" type="submit" id="submit" tabindex="4" value="Submit" />
</form>
My jQuery code (only structure to make it simpler):
$("#submit").click(function() {
$.ajax({
dataType: 'json',
beforeSubmit: function() {
},
timeout: 60000,
error: function(request,error) {
},
success: function(data) {
var obj = jQuery.parseJSON(data);
//blah blah...
} // End success
}); // End ajax method
});
On the server side:
class PostComment(BaseHandler):
def post(self):
self.response.headers['Content-Type'] = "application/json"
response = {'errorcode': 0}
self.response.out.write(json.dumps(response))
The result is: After I click the "submit" button, My Firefox 3.6 browser says: There is "application/json" file, do you want to open it with which tool?
I was expecting jQuery to catch this 'json' data and process it. But it didnt happen.
I believe I am almost there but something is wrong.
You need to cancel the default action of the form, which is to submit (which cancels any running JavaScript AJAX query in progress):
$("#submit").click(function() {
$.ajax({
dataType: 'json',
beforeSubmit: function() {
},
timeout: 60000,
error: function(request,error) {
},
success: function(data) {
var obj = jQuery.parseJSON(data);
//blah blah...
} // End success
}); // End ajax method
return false; // Cancel default action.
});
By returning false from the click handler, the normal form action, which is for the browser to submit the data to the URL named in the action attribute, is not executed.
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