IOError 35 when trying to read the result of call to urllib2.urlopen

[matt]

I'm using urllib2's urlopen function to post to a service which should
return a rather lengthy JSON object as the body of its response.
Here's the code:

{{{
ctype, body = encode_multipart(fields, files)
url = 'http://someservice:8080/path/to/resource'
headers = {'Content-Type': ctype, 'Content-Length': str(len(body))}
req = urllib2.Request(url, body, headers)
resp = urllib2.urlopen(req)

resp_body = resp.read()
}}}

When I try to look at "resp_body" I get this error:

IOError: [Errno 35] Resource temporarily unavailable

I posted to the same URI using curl and it worked fine, so I don't
think it has to do with the server.

Any thoughts?

 

[Steven D'Aprano]

When I try to look at "resp_body" I get this error:

IOError: [Errno 35] Resource temporarily unavailable

I posted to the same URI using curl and it worked fine, so I don't
think it has to do with the server.

Are your Python code and curl both using the same proxy? It may be that one
is going direct and the other is using a proxy.

Or perhaps the destination is just flaky, and the resource genuinely is
temporarily unavailable. Or it doesn't like your useragent string and is
lying.

 

[matt]

When I try to look at "resp_body" I get this error:

IOError: [Errno 35] Resource temporarily unavailable

I posted to the same URI using curl and it worked fine, so I don't
think it has to do with the server.

Are your Python code and curl both using the same proxy? It may be that one
is going direct and the other is using a proxy.

Or perhaps the destination is just flaky, and the resource genuinely is
temporarily unavailable. Or it doesn't like your useragent string and is
lying.

No proxy. It's all local over the loopback interface (probably should
have mentioned that). The service I'm POSTing to is a Python web app
with CherryPy as the framework. Also, because of some dependency
issues I'm using Python 2.6.