Hi Kurt,
When you query sparql endpoint http://virtuoso.dbtune.org/sparql it
contains the default graph URI of http://dbtune.org/myspace/ which
you are not including in your curl query as a result it is querying
against the entire QUAD stored or whatever the Default graph is set to
in the Virtuoso configuration file. If the default graph URI is added
as a FROM clause in your curl query then same result is returned:
$ curl -v -F "query=SELECT ?s FROM <http://dbtune.org/myspace/> WHERE
{ <http://dbtune.org/myspace/uid/170532611> <http://xmlns.com/foaf/0.1/name
> ?s }" http://virtuoso.dbtune.org/sparql
* About to connect() to virtuoso.dbtune.org port 80 (#0)
* Trying 138.37.95.213... connected
* Connected to virtuoso.dbtune.org (138.37.95.213) port 80 (#0)
> POST /sparql HTTP/1.1
> User-Agent: curl/7.19.4 (universal-apple-darwin10.0) libcurl/7.19.4
OpenSSL/0.9.8k zlib/1.2.3
> Host: virtuoso.dbtune.org
> Accept: */*
> Content-Length: 271
> Expect: 100-continue
> Content-Type: multipart/form-data;
boundary=----------------------------3e77c2b08543
>
< HTTP/1.1 100 Continue
< HTTP/1.1 100 Continue
< HTTP/1.1 200 OK
< Date: Thu, 08 Oct 2009 10:39:17 GMT
< Server: Virtuoso/05.11.3039 (Linux) x86_64-unknown-linux-gnu
< Accept-Ranges: bytes
< Content-Type: application/sparql-results+xml; charset=UTF-8
< Content-Length: 373
< Connection: close
<
<sparql xmlns="http://www.w3.org/2005/sparql-results#"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance
" xsi:schemaLocation="http://www.w3.org/2001/sw/DataAccess/rf1/result2.xsd
">
<head>
<variable name="s"/>
</head>
<results distinct="false" ordered="true">
<result>
<binding name="s"><literal>CARLOS LYRA</literal></binding>
</result>
</results>
* Closing connection #0
Best Regards
Hugh Williams
Professional Services
OpenLink Software
Web: http://www.openlinksw.com
Support: http://support.openlinksw.com
Forums: http://boards.openlinksw.com/support
Twitter: http://twitter.com/OpenLink
On 7 Oct 2009, at 18:19, Kurt J wrote:
here is the full result of the curl
curl -v -F "query=SELECT ?s WHERE {
<http://dbtune.org/myspace/uid/170532611>
<http://xmlns.com/foaf/0.1/name> ?s }"
http://virtuoso.dbtune.org/sparql
* About to connect() to virtuoso.dbtune.org port 80 (#0)
* Trying 138.37.95.213... connected
* Connected to virtuoso.dbtune.org (138.37.95.213) port 80 (#0)
POST /sparql HTTP/1.1
User-Agent: curl/7.16.3 (powerpc-apple-darwin9.0) libcurl/7.16.3
OpenSSL/0.9.7l zlib/1.2.3
Host: virtuoso.dbtune.org
Accept: */*
Content-Length: 237
Expect: 100-continue
Content-Type: multipart/form-data;
boundary=----------------------------bfd1b22d711d
< HTTP/1.1 100 Continue
< HTTP/1.1 100 Continue
< HTTP/1.1 502 Proxy Error
< Date: Wed, 07 Oct 2009 17:00:44 GMT
< Content-Length: 476
< Connection: close
< Content-Type: text/html; charset=iso-8859-1
<
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>502 Proxy Error</title>
</head><body>
<h1>Proxy Error</h1>
<p>The proxy server received an invalid
response from an upstream server.<br />
The proxy server could not handle the request <em><a
href="/sparql">POST /sparql</a></em>.<p>
Reason: <strong>Error reading from remote server</strong></p></p>
<hr>
<address>Apache/2.2.3 (CentOS) Server at virtuoso.dbtune.org Port
80</address>
</body></html>
* Closing connection #0
does this imply a funky Apache setting???
On Wed, Oct 7, 2009 at 4:59 PM, Kurt J <kur...@gmail.com> wrote:
Hello,
A user made me aware of this on the DBtune/myspace endpoint
http://virtuoso.dbtune.org/sparql
this query:
SELECT ?s WHERE { <http://dbtune.org/myspace/uid/170532611>
<http://xmlns.com/foaf/0.1/name> ?s }
runs fine through the web interface but then seems to timeout in all
other instances:
curl -v -F "query=SELECT ?s WHERE {
<http://dbtune.org/myspace/uid/170532611>
<http://xmlns.com/foaf/0.1/name> ?s }"
http://virtuoso.dbtune.org/sparql
(times out)
i've been neglecting this service for a while b/c we're waiting for a
new server w/ more space. we're running virtuoso 5.11
thanks!
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