我有一个pretty的标准情况下，如果我尝试通过jQuery的Ajax提交一些JSON数据。

I have a pretty standard case, where I try to submit some JSON data via jQuery's Ajax.

我的Java脚本code是这样的：

My Java Script code looks like this:

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.0/jquery.min.js"></script>
<script type='text/javascript' src='script.js'></script>
<script type='text/javascript'>
    $(document).ready(function() {
        $("#submit").click(function() {
            $.post('/test', {test : '123'}, function(data) { alert("callback received"); }, 'json');
        });
    });
</script>

在App Engine的身边，我有这样的：

On the App Engine side I have this:

class Submit(webapp.RequestHandler):
    def post(self):
        logging.info(self.request.body)
        self.response.out.write("test_response")

我收到JSON数据 logging.info（self.request.body）完美的，但后来只要我送出去的响应会触发一个错误。错误日志我得到的是这样的：

I receive the JSON data logging.info(self.request.body) perfectly, but then it triggers an error as soon as I send out the response. The error log I get is the following:

Exception happened during processing of request from ('192.168.2.8', 38875)
Traceback (most recent call last):
  File "/usr/lib/python2.6/SocketServer.py", line 283, in handle_request_noblock
    self.process_request(request, client_address)
  File "/usr/lib/python2.6/SocketServer.py", line 309, in process_request
    self.finish_request(request, client_address)
  File "/usr/lib/python2.6/SocketServer.py", line 322, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/home/hw/Siine/google_appengine/google/appengine/tools/dev_appserver.py", line 3123, in init_
    BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, *args, **kwargs)
  File "/usr/lib/python2.6/SocketServer.py", line 618, in __init__
    self.finish()
  File "/usr/lib/python2.6/SocketServer.py", line 661, in finish
    self.wfile.flush()
  File "/usr/lib/python2.6/socket.py", line 297, in flush
    self._sock.sendall(buffer(data, write_offset, buffer_size))
error: [Errno 32] Broken pipe

我绝对不知道我做错了，因为这看起来非常简单。

I have absolutely no idea what I do wrong, since this seems straightforward.

推荐答案

解决方案是很简单，但我花了一段时间来弄明白。

The solution was quite simple, although it took me a while to figure it out.

在提交按钮 ＆LT;输入类型=提交ID =提交值=提交＆GT; 则不能使用 TYPE =提交。

In the submit button <input type="submit" id="submit" value="Submit"> you cannot use type="submit".

我把它改为 TYPE =按钮从那以后，它完美的作品。

I changed it to type="button" and since then it works perfectly.

如果有谁知道这是为什么，请随时赐教。谢谢你。

If anyone knows why that is, feel free to enlighten me. Thanks.