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Editorial Team
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Asked: 2026-06-10T08:08:33+00:00

I’m getting a broken pipe error with gae/python, and none of the solutions I

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I’m getting a broken pipe error with gae/python, and none of the solutions I can find seem to apply to my case. (For example, the question below is similar, but it hinges on the use of submit vs button which is not my issue).

Google App Engine & jQuery Ajax causes a Broken Pipe error

Here’s my javascript:

var testVar = [1,2]

function testFun() {
    jQuery.post("http://localhost:8084",testVar.toString(), function()
    {
        console.log( "post ok" );
    }
)
document.write(testVar)
}

Here’s the HTML:

<!doctype html>

<html>

<head>
<title>Experiment</title>
<meta charset="utf-8" />
<style type="text/css">  </style>
<script type="text/javascript" src="lib/jquery/jquery-1.4.2.js"></script>
<script src="js/posttestjs.js"></script>

</head>

<body>

<input id = "start_button" type="button" onclick= "testFun()" value="begin"> 

</body>

</html>

And here’s my python:

from google.appengine.ext import db
import webapp2
import logging

class data(webapp2.RequestHandler):
    def post(self):
        logging.info('CHECK1')
        self.response.out.write("""<html><body> CHECK2 </body></html>""")


app = webapp2.WSGIApplication([('/', data)] , debug = True)

The error I get is this:

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line     284, in _handle_request_noblock
    self.process_request(request, client_address)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line     310, in process_request
    self.finish_request(request, client_address)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line     323, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File "/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-        default.bundle/Contents/Resources/google_appengine/google/appengine/tools/dev_appserver.py", line     2630, in __init__
BaseHTTPServer.BaseHTTPRequestHandler.__init__(self, *args, **kwargs)
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line 640, in __init__
    self.finish()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/SocketServer.py", line     693, in finish
    self.wfile.flush()
  File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 303, in     flush
    self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe

Last, here’s my .yaml file:

application: posttestjs
version: 1
runtime: python27
api_version: 1
threadsafe: true

handlers:
- url: /static
  static_dir: static
- url: /.*
  script: posttestjs.app

I see CHECK1 in the log, so I think that the post is received OK, but the response doesn’t work.

In case it’s relevant: I’m using firefox, and python 2.7.3. Thanks!

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1 Answer

  1. Editorial Team

    Oddly, the issue went away as soon as I started putting the posted data into the GAE datastore. I don’t see any good reason why this should have fixed the problem, but it seems to have done so.

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