BaseX-Talk

basex-talk@mailman.uni-konstanz.de

6 participants
5250 discussions

Invitation: I AM LOOKING FOR ROMANCE @ Sun 30 Jun 2013 12:00 - 13:00 (sallymore02@gmail.com)
by Sally Moore 30 Jun '13

30 Jun '13

You have been invited to the following event. Title: I AM LOOKING FOR ROMANCE I AM LOOKING FOR ROMANCE My name is Sally Moore, I came acrose your profile when i was searching for a life partner I was inspired to send you a massage and ask you for friendship. As you know that having a prophesy of love over somebody there most be odds around the corner, but no matter the odds, love survive all odds. I am a girl who's love story is intresting. I am responsible, romantic and courageous. I belive, with good mind you have to admit my request Please recontact me with my e-mail address at......( sallymoore21(a)yahoo.com ) so I can send my picture and tell you more about myself. Yours Love Miss Sally When: Sun 30 Jun 2013 12:00 – 13:00 Ouagadougou Calendar: sallymore02(a)gmail.com Who: (Guest list has been hidden at organiser's request) Event details: https://www.google.com/calendar/event?action=VIEW&eid=aGhpZ21xZDRhYzYxdmQ3O… Invitation from Google Calendar: https://www.google.com/calendar/ You are receiving this courtesy email at the account basex-talk(a)mailman.uni-konstanz.de because you are an attendee of this event. To stop receiving future notifications for this event, decline this event. Alternatively, you can sign up for a Google account at https://www.google.com/calendar/ and control your notification settings for your entire calendar.

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limiting time or space resources in calls to xquery:eval() ?
by C. M. Sperberg-McQueen 29 Jun '13

29 Jun '13

I'm contemplating the construction of an interface for advanced or dedicated users of a database, with a text box in which they type their queries as XQuery modules. (Non-advanced and non-dedicated users will make do with a variety of pre-defined queries; this interface is intended to provide an open-ended query interface for the few users who will need it.) One issue that arises is security: any use of an eval() function opens the door to code injection attacks. For now, I'm inclined to think that BaseX's rule that xquery:eval() does not accept updating expressions suffices to protect the database from harm. Parsing the query and declining potentially harmful queries is also a possibility, if I can persuade myself I can distinguish harmful from harmless queries. (Comments and advice on this topic welcome, even though it's not the focus of this question.) A second issue is resource usage. Imagine a hostile user who writes a query designed to tie up the server for a long time and consume a lot of memory. Or imagine a non-hostile but naive user who unintentionally concocts an extremely expensive query. Is there a way to put a call to eval() (or any call to the BaseX HTTP server) into some kind of box and specify limits on the amount of CPU time, the amount of clock time, and/or the amount of storage to be available for its evaluation? Michael -- **************************************************************** * C. M. Sperberg-McQueen, Black Mesa Technologies LLC * http://www.blackmesatech.com * http://cmsmcq.com/mib * http://balisage.net ****************************************************************

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Comment filtrer le goudron de vos cigarettes ?
by Filtre AG 28 Jun '13

28 Jun '13

Petit, Léger, Lavable et Conserve le GOUDRON Si vous faites partie des fumeurs qui aimeraient diminuer les effets néfastes de la cigarette, ce mail est fait pour vous. Le Filtre AG est un porte-cigarette santé. Il permet de filtrer une très grande partie des goudrons qui sont présents dans vos cigarettes. Son utilisation est d'une simplicité déconcertante, il suffit simplement de fixer le filtre au bout de sa cigarette et de fumer. Dès la première bouffée, vous verrez apparaître le goudron dans le filtre, choc visuel assuré. Le Filtre AG est réutilisable à l'infini, il suffit de le nettoyer avec un mouchoir et vous pourrez le réutiliser et ça indéfiniment. Son prix dérisoire, vous permettra de préserver à minima vos poumons, votre gorge et votre dentition. Fini les odeurs sur les mains, fini les dents jaunes. Le Filtre AG a été testé au laboratoire national d'essai français. Soyez en sûr, le Filtre AG vous permettra de diminuer fortement les goudrons présents dans vos cigarettes tout en gardant la saveur originelle de vos cigarettes. Accéder à plus d'informations >> Le code promo filtronslegoudron vous permettra de bénéficier dès à présent de 40%* de réduction. *valable jusqu'au 15/07/2013 Enfin la solution pour limiter les effets néfastes de la cigarette Vidéo de démonstration *Filtre AG est une marque déposée auprès de l'institut nationale de la propriété industrielle. Pour ne plus recevoir de mail de notre part, veuillez cliquer STOPMAIL

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indent parameter
by Hans-Juergen Rennau 28 Jun '13

28 Jun '13

Hello, it seems to me there is a couple of issues concerning the handling of indentation (serialization parameter "indent"). a) Using "indent=no" whitespace-only text nodes between element nodes are removed b) Using "indent=yes" the content of elements with xml:space="preserve" is indented, too I suppose both behaviors are in contraction to the spec ( http://www.w3.org/TR/xslt-xquery-serialization/#xml-indent ). As a particular consequence, (a) seems to preclude making an exact copy of a document (fragment) - all whitespace-only text nodes vanish. And as a consequence of (b) one has no possibility to locally protect the whitespace used in the source document, as required for example when reusing "programlisting" elements of docbook. Or did I overlook something? Kind regards, Hans-Juergen

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Corrupt database
by Lars Iversen 28 Jun '13

28 Jun '13

Hi, We are using the REST API with BaseX 7.6. After doing approximately 100 PUT requests for creating documents in a database, we get the error listed below. So far I haven't been able to reproduce it, but I have the database if that would be any help. Any suggestion on how to un-corrupt the database? Improper use? Potential bug? Your feedback is welcome: Contact: basex-talk(a)mailman.uni-konstanz.de Version: BaseX 7.6 Java: Oracle Corporation, 1.7.0_25 OS: Windows 7, x86 Stack Trace: java.lang.RuntimeException: Data Access out of bounds: - pre value: 0 - #used blocks: 0 - #total locks: 0 - access: -1 (0 > -1] org.basex.util.Util.notexpected(Util.java:53) org.basex.io.random.TableDiskAccess.cursor(TableDiskAccess.java:488) org.basex.io.random.TableDiskAccess.read1(TableDiskAccess.java:189) org.basex.data.Data.kind(Data.java:283) org.basex.query.value.node.DBNode.<init>(DBNode.java:49) org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:108) org.basex.query.value.seq.DBNodeSeq.get(DBNodeSeq.java:96) org.basex.query.QueryResources.compile(QueryResources.java:62) org.basex.query.QueryContext.compile(QueryContext.java:200) org.basex.query.QueryProcessor.compile(QueryProcessor.java:66) org.basex.query.QueryProcessor.execute(QueryProcessor.java:95) org.basex.query.QueryProcessor.queryNodes(QueryProcessor.java:204) org.basex.core.cmd.AQuery.queryNodes(AQuery.java:185) org.basex.core.cmd.Cs.run(Cs.java:23) org.basex.core.Command.run(Command.java:342) org.basex.core.Command.exec(Command.java:321) org.basex.core.Command.execute(Command.java:78) org.basex.server.LocalSession.execute(LocalSession.java:122) org.basex.server.Session.execute(Session.java:37) org.basex.http.rest.RESTCode.open(RESTCode.java:43) org.basex.http.rest.RESTRetrieve.run(RESTRetrieve.java:41) org.basex.http.rest.RESTGet.run(RESTGet.java:67) org.basex.http.rest.RESTServlet.run(RESTServlet.java:14) org.basex.http.BaseXServlet.service(BaseXServlet.java:39) javax.servlet.http.HttpServlet.service(HttpServlet.java:848) org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:648) org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455) org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:559) org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:232) org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1072) org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:382) org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:194) org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1006) org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) org.eclipse.jetty.server.Server.handle(Server.java:365) org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:485) org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:926) org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:988) org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635) org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82) org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:627) org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:51) org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) java.lang.Thread.run(Unknown Source) Med venlig hilsen / Kind regards [Description: Systematic Logo]<http://www.systematic.com/> Lars Iversen Senior Systems Engineer Søren Frichs Vej 39, 8000 Aarhus C Denmark Mobile: +45 4196 5164 Lars.Iversen(a)systematic.com<mailto:Lars.Iversen@systematic.com> www.systematic.com<http://www.systematic.com>

2 1

One long running read query blocking other read xqueries execution
by Srinivasan Muthu 26 Jun '13

26 Jun '13

I use BaseX 7.7 build from couple days ago with GLOBALLOCK=false. I run using client-server mode. I have one long running read-only xQuery (say query1) that needs to be optimized but for now it takes about 3 minutes to run. While query1 is running all other read-only xQueries are queued up (from BaseX server logs) and wait for query1 completion. After query1 is done, all other xQueries get executed one after the other. Note query1 only accesses one document and all other xQueries run in parallel operate on a different document. Before I debugged this more, can you let me know if a read-only query can block other read-only query? and if so any hints at where I should look at? I am also in the process of debugging this more, so if I can get a sample code ready, I will share with you guys soon for making this easy. Thanks, Srini

2 2

Out of Main Memory; bytea type
by Alexander von Bernuth 24 Jun '13

24 Jun '13

Hello all, my basex-script should fetch 10.000something XML-files automatically from a website and insert their content into a external PostgreSQL-database. After about 8.000 files my script stops and I get "Out of Main Memory". I found your discussion with "kgfhjjgrn" [1] regarding this issue, but I'm not sure whether these options apply to my problem - I do not build a basex-database but an external one. Will autoflush=false and flushing by myself help with this? Second, I want to insert some xs:base64Binary into my PostgreSQL database, but I cannot find the correct sql:parameter type for the bytea-column. Could you please help me with my issues? Thank you very much, Alexander [1] http://comments.gmane.org/gmane.text.xml.basex.talk/2540 -- | Alexander von Bernuth | alexander.von-bernuth(a)student.uni-tuebingen.de

2 4

BaseX and XML 1.0/1.1 names (and other implementation-defined items)
by C. M. Sperberg-McQueen 24 Jun '13

24 Jun '13

For reasons I won't go into here, I have developed a desire to know something I've never particularly wondered about in the past: Which version of XML NCNames does BaseX use? The one given in XML 1.0 5th edition and in XML 1.1? or the one given in earlier versions of XML? And while I'm looking for implementation-defined properties -- is there a place in the documentation that lists BaseX's decisions on the various implementation-defined items listed in http://www.w3.org/TR/xpath20/#id-impl-defined-items and http://www.w3.org/TR/xquery/#id-impl-defined-items ? I did a search in the documentation for "implementation-defined" but did not find any likely candidates among the hits; I may have overlooked it, though. -- **************************************************************** * C. M. Sperberg-McQueen, Black Mesa Technologies LLC * http://www.blackmesatech.com * http://cmsmcq.com/mib * http://balisage.net ****************************************************************

2 1

Error messages from BaseX.main()
by Brock, David 19 Jun '13

19 Jun '13

I want to call BaseX.main() from a Java GUI and need to display errors to the user. There are no exceptions thrown by this method, and I do not see a way to redirect so that I can capture and display. Thanks, David

2 2

Best practices for concurrency
by The Trainspotter 19 Jun '13

19 Jun '13

Hi, I've read through the online example on server concurrency, however, currently I'm not running a BaseXServer instance I'm just running things locally. I want multiple threads in my application to be able to query the database at once without treading on each others toes. What's the best approach for doing this? I have tried querying the database using different threads but I keep getting internal BaseX errors which leads me to think I'm going about this the wrong way. Cheers Gary

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