ajax - Google App Engine 和 jQuery Ajax 导致 Broken Pipe 错误

Question

我有一个非常标准的案例，我尝试通过 jQuery 的 Ajax 提交一些 JSON 数据。

我的 Java 脚本代码如下所示:

<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 方面，我有这个:

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

我完美地收到了 JSON 数据 logging.info(self.request.body)，但是一旦我发出响应它就会触发错误。我得到的错误日志如下:

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

我完全不知道我做错了什么，因为这看起来很简单。

Answer 1

我的猜测是您需要通过在事件对象上调用 .preventDefault() 或从您的处理程序返回 false 来取消提交操作。当默认提交行为触发时，它会将浏览器导航离开页面。