Holger,
I'm a little stuck in the middle here. The response from the API
owner is reasonable:
As for the Content-Encoding, the API follows the standard practice of
returning gzipped content when the client says it can accept it, and
uncompressed content when the client sends in an "Accept-Encoding" header
saying it can't.
You can see it for yourself using the standard "curl" utility via the
command line. When the Accept-Encoding header doesn't specify gzip, the
response does not include the "Content-Encoding: gzip" header:
curl --head http://ohana-api-demo.herokuapp.com/api/locations -H
Accept-Encoding:identity
I don't know much Java, but you generally want to be using a standard tool
that can parse JSON and that can set headers like "Accept Encoding" and
"User-Agent".
I think HttpClient might be the tool to use for you:
http://hc.apache.org/httpclient-3.x/tutorial.html
I don't really want to contemplate creating my own custom SPARQLMotion
module just to have it behave properly. I'm not sure why your java library
is supplying a URL class that issues a header (apparently) that says it will
accept gzip, and then not be able to handle a gzip response.
- Steve
Steven R. Ray, Ph.D.
Distinguished Research Fellow
Carnegie Mellon University
NASA Research Park
Building 23 (MS 23-11)
P.O. Box 1
Moffett Field, CA 94305-0001
Email: [email protected]
Phone: (650) 587-3780
Cell: (202) 316-6481
Skype: steverayconsulting
10yr-logo-sm
From: [email protected]
[mailto:[email protected]] On Behalf Of Holger Knublauch
Sent: Tuesday, April 22, 2014 8:27 PM
To: [email protected]
Subject: Re: [topbraid-users] http code 500 problem when using Module
"Import text from URL"
This module doesn't do anything special. Here is the basic Java code of this
module for your information:
URL url = new URL(urlString);
InputStream is = url.openStream();
So it just uses the default mechanism that Java has built into the URL
class. I am not sure what request header the given URL expects.
Holger
On 4/23/2014 13:24, Steve Ray wrote:
Hmm. Does the SPARQLMotion module issue an Accept-Encoding value of "gzip,
deflate" in the request header? Or said another way, is there a way to
modify the request header generated by the module?
- Steve
Steven R. Ray, Ph.D.
Distinguished Research Fellow
Carnegie Mellon University
NASA Research Park
Building 23 (MS 23-11)
P.O. Box 1
Moffett Field, CA 94305-0001
Email: [email protected]
Phone: (650) 587-3780
Cell: (202) 316-6481
Skype: steverayconsulting
10yr-logo-sm
From: [email protected]
[mailto:[email protected]] On Behalf Of Holger Knublauch
Sent: Tuesday, April 22, 2014 5:04 PM
To: [email protected]
Subject: Re: [topbraid-users] http code 500 problem when using Module
"Import text from URL"
Looking at the server response header, it seems like the JSON is returned
with content-encoding of gzip. Could this be changed to be delivered as
normal text? Web Browsers seem to unzip this automatically but SPARQLMotion
will not.
Holger
On 4/23/2014 9:56, Steve Ray (CMU) wrote:
Question: Why is it that I get a Code 500 error when trying to retrieve text
from http://ohana-api-demo.herokuapp.com/api/locations within a SPARQLMotion
script, when using that same URL in a browser works just fine?
This is a script that I use with other sources of json data just fine, so I
don't think it's the "fault" of TBC. But do you think it could be a timeout
problem or something? Is there any setting I can change? Any other ideas?
The script works when I copy the data to a local file and use
<file:///\\%5C%5C%5C%5Clocalhost%5CData%5CWork%5CTopBraid%5COntology%5Cproje
cts%5Csc.r20130211%5CScripts%5CInput%5COhanaLocations.txt>
file://localhost/Data/Work/TopBraid/Ontology/projects/sc.r20130211/Scripts/I
nput/OhanaLocations.txt
to retrieve it.
- Steve
Steven R. Ray, Ph.D.
Distinguished Research Fellow
Carnegie Mellon University
NASA Research Park
Building 23 (MS 23-11)
P.O. Box 1
Moffett Field, CA 94305-0001
Email: [email protected]
Phone: (650) 587-3780
Cell: (202) 316-6481
Skype: steverayconsulting
10yr-logo-sm
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