This data set is 65160 bytes. I am having a bit more success with urllib2
but still not there yet...byte swapping and such. But now I think the
server is having problems.
Thanks for your help.
-Original Message-
From: Kent Johnson [mailto:[EMAIL PROTECTED]
Sent: Monday, April 18, 2005 13:10
Cc: tutor@python.org
Subject: Re: [Tutor] Trying to d0 HTTP GET
Ertl, John wrote:
> All,
>
> I am trying to get some binary data from a web service. None of the tech
> guys are around so I am hoping you might be able to shed some light on
what
> might be happening.
I would think that
f = urllib.urlopen(...)
data = f.read()
would work. You could try urllib2.urlopen() and see if it is any better.
How big is the data you are expecting?
Kent
>
> Here is part of the email that explained what I needed to do.
>
> - clip ---
>
> If you can do an http "get" from Python, you'll be set.
>
>
http://dsd1u:7003/GRID:U:WW3_GLOBAL:2005041512:global_360x181:max_wav_ht:sur
> face:::fcst_ops:0480
>
> It returns an http header like the following (if the grid exists),
> followed by the grid data in big-endian, IEEE format.
>
> "HTTP/1.1 200 OK\r\n"
> "Server: ISIS/4.0\r\n"
> "Content-type: application/x-grid\r\n"
> "Content-length: 261234\r\n\r\n"
>
> - end-
>
> The grid data is in Binary. How would I get to this? I would imagine
that
> since f (the object) exists the call to the web service worked. Now I need
> to read the grid...eventually I need to put it into a Numeric array but
not
> sure how to get just the grid from "f".
>
> As a simple starting point I tried.
>
>
>>>>import urllib
>>>>f =
>
>
urllib.urlopen("http://dsd1u:7003/GRID:U:WW3_GLOBAL:2005041800:global_360x18
> 1:max_wav_ht:surface:::fcst_ops:0240")
>
>>>>f.info()
>
>
>
>>>>f.readlines()
>
>
> I tried read(), readLines() and some other stuff using scipy and Numeric.
>
> The prompt has moved to the next line but nothing else has happened for 30
> min or so (I have tried several times). When I try to close IDLE it says
> the program is still running. How should I be getting this data is it
> trying to read the binary and that is why it is stalled?
>
> Thanks,
>
> John Ertl
>
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