AJAX邮政储存JSON与Python和JavaScript邮政、AJAX、JSON、JavaScript
我一直有问题，让AJAX正确张贴JSON。该应用程序的目的是要在谷歌的App Engine托管。但是，我有什么不发布数据。
I have been having problems with getting AJAX to post JSON correctly. The application is intended to be hosted on Google App Engine. But what I have does not post data.
的Python
mainPage = """
<html>
html is included in my python file.
</html>
"""
class JSONInterface(webapp2.RequestHandler):
def post(self):
name =self.request.get('name')
nickname =self.request.get('nickname')
callback = self.request.get('callback')
if len(name) > 0 and len(nickname) >0:
newmsg = Entry(name=name, nickname=nickname)
newmsg.put()
if len(name)>0:
self.response.out.write(getJSONMessages(callback))
else:
self.response.out.write("something didnt work")
def get(self):
callback = self.request.get('callback')
self.response.out.write(getJSONMessages(callback))
该处理器是为了处理来自Web应用程序的Ajax调用。我不确定我是否需要JavaScript来与我的主网页，以便相关的这样做，因为我还没有发现关于这些事与我的搜索。
This handler is meant to handle the Ajax calls from the web app. I am unsure if I need javascript to be associated with my main page in order to do so, as I haven't found information on it yet with my searches.
Javascript的
Javascript
$(document).ready( function() {
$("#post").bind('click', function(event){
var name = $("#name").val();
var nickname = $("#nickname").val();
postData = {name: name, nickname: nickname, callback: "newMessage"};
$.ajax({
type: "POST",
url: "http://localhost:27080/json",
data: postData,
dataType: "json",
done: function() {
// Clear out the posted message...
$("#nickname").val('');
},
fail: function(e) {
confirm("Error", e.message);
}
});
// prevent default posting of form (since we're making an Ajax call)...
event.preventDefault();
});
的JavaScript后
The Javascript for the post
有人可以告诉我，我怎么能解决我遇到的问题。感谢您的时间和帮助。
Can someone advise me on how I could resolve the problem I am having. Thanks for the time and help.
推荐答案
对于初学者来说，AJAX调用pretty的接近。完整路径
For starters, the ajax call is pretty close. The full path
"http:://localhost:27080/json"
是没有必要的，相对路径将工作，但是没问题的。
is not necessary, the relative path will work, but that is not the problem.
您的回调，因为它的立场，将作为成功：
Your callback, as it stands, will work as 'success':
success: function(response) {
alert(response);
// Clear out the posted message...
$("#nickname").val('');
}
不过，这种回调被淘汰，有利于other方法的。 完成应该捆绑，像这样：
However, this callback is being phased out in favor of other methods. 'Done' should be chained like so:
$.ajax({
type: "POST",
url: "/json",
data: postData,
dataType: "json"
}).done(function(data){
console.log(data);
});
此外，可能存在在服务器上的问题。如果你使用一些日志记录，您将看到的数据确实被发送到服务器。
Also, there might be problems on the server. If you use some logging, you will see that the data is indeed being sent to the server.
import json ## we'll get to this below
import logging
class JSONInterface(webapp2.RequestHandler):
def post(self):
name = self.request.get('name')
logging.info(name) ## will print the value of 'name'
除非你的Python功能getJSONMessages（回调）返回一个JSON对象，你的回调将不会被调用，即使你加的响应参数。 在你的Python code：
Unless your python function getJSONMessages(callback) is returning a json object, your callback will not be called, even after you add the response parameter. In your python code:
import json
import logging
class JSONInterface(webapp2.RequestHandler):
def post(self):
callback = self.request.get('callback')
logging.info(callback) # will print correctly
self.response.out.write(json.dumps(callback))
使用 json.dumps方法 EN codeS的传递对象为JSON，这是你的Ajax对象所期待的。
Using the json.dumps method encodes the passing object to json, which is what your ajax object is looking for.
