BaseX-Talk

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5252 discussions

RESTXQ and regexp
by Marco Lettere 04 Mar '19

04 Mar '19

Hello all, according to the docs this should be possible: (: Matches all paths with "app" as first, a number as second, and "order" as third segment :) declare %rest:path("app/{$code=[0-9]+}/order") function page:order($full-path) { ... }; (: Matches all other all paths starting with "app/" :) declare %rest:path("app/{$path=.+}") function page:others($path) { ... }; And it actually is... We are currently in the very unfortunate situation where we need the following: (: Matches anything followed by /input :) declare %rest:path("app/{$path=.+}/input") function page:inputs($path) { ... }; (: Matches all other all paths starting with "app/" :) declare %rest:path("app/{$path=.+}") function page:others($path) { ... }; Unfortunately this makes all the calls to be redirected to the page:others function ... is there a motivation behind it or could it be possible to work around that? Thanks, Marco.

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If clause
by Giuseppe G. A. Celano 04 Mar '19

04 Mar '19

Hi, I see that in BaseX 9.1.2 an expression such as "if (3) then 4 " does not raise an error, even if the "else" part is missing. Is this correct? Ciao, Giuseppe

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Class 'BaseXHTTP' missing?
by Jan Stapel 28 Feb '19

28 Feb '19

Hello, i just tried to run the Java REST-Examples found on GIT/the basex-doc. BaseXHTTP cannot be resolved to a type. I am using the current version. Am I missing something? best, Jan

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Activating gzip compression
by Omar Siam 27 Feb '19

27 Feb '19

Hi, I tried both ways of enabling gzip compression for JSON and js (and others). I can't see it actually working. The GzipFilter method from the web.xml sample seems to be deprecated with a warning of "it is bug ridden" ... But then in a browser debugger I cannot see it actually zipping anything. I trief to enable this in my BaseX 9.1.2 instance using <filter> <filter-name>GzipFilter</filter-name> <filter-class>org.eclipse.jetty.servlets.GzipFilter</filter-class> <init-param> <param-name>mimeTypes</param-name> <param-value>text/html,text/xml,text/ecmascript,application/xhtml+xml,application/json,application/javascript,image/svg+xml</param-value> </init-param> </filter> <filter-mapping> <filter-name>GzipFilter</filter-name> <url-pattern>/*</url-pattern> </filter-mapping> The GzipHandler method seems to get loaded but then also in a browser debugger I cannot see it actually zipping anything. For the GzipHandler the documentation https://www.eclipse.org/jetty/documentation/current/gzip-filter.html talks about when it actually gets invoked and mentions: * No content-encoding is specified by the resource I found no way to not specify an encoding for whatever I return in RESTXQ. If I don't specify anything it's UTF-8. it shows up as "; character-set=UTF-8"I did not find a way to specify no encoding. Maybe unrelated but perhaps that is a problem. I modified webapp/WEB-INF/jetty.xml like this so it uses the GzipHandler (copied from the current jetty distribution): <Configure id="Server" class="org.eclipse.jetty.server.Server">  <Call name="addConnector"> ... </Call> <Call name="insertHandler"> <Arg> <New id="GzipHandler" class="org.eclipse.jetty.server.handler.gzip.GzipHandler"> <Set name="minGzipSize"><Property name="jetty.gzip.minGzipSize" deprecated="gzip.minGzipSize" default="2048"/></Set> <Set name="checkGzExists"><Property name="jetty.gzip.checkGzExists" deprecated="gzip.checkGzExists" default="false"/></Set> <Set name="compressionLevel"><Property name="jetty.gzip.compressionLevel" deprecated="gzip.compressionLevel" default="-1"/></Set> <Set name="inflateBufferSize"><Property name="jetty.gzip.inflateBufferSize" default="0"/></Set> <Set name="deflaterPoolCapacity"><Property name="jetty.gzip.deflaterPoolCapacity" default="-1"/></Set> <Set name="syncFlush"><Property name="jetty.gzip.syncFlush" default="false" /></Set> <Set name="excludedAgentPatterns"> <Array type="String"> <Item><Property name="jetty.gzip.excludedUserAgent" deprecated="gzip.excludedUserAgent" default=".*MSIE.6\.0.*"/></Item> </Array> </Set> <Set name="includedMethodList"><Property name="jetty.gzip.includedMethodList" default="GET" /></Set> <Set name="excludedMethodList"><Property name="jetty.gzip.excludedMethodList" default="" /></Set> </New> </Arg> </Call> </Configure> I hope there is a way to get this to work. Best regards Omar Siam

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geo:distance() return units
by Jacob Borisov 26 Feb '19

26 Feb '19

Hello. Could anybody explain how to get a result from geo:distance() in kilometers or miles? Thanks.

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Re: [basex-talk] BaseX-Talk Digest, Vol 110, Issue 29
by Shaun Flynn 25 Feb '19

25 Feb '19

Hello there Marco, This might be down to the choice of regex. Assume $path = "path" app/{$path=.+} Will match "app/path=1234" And "app/path=1234/input" Which I think would be matched by ".+" part of the expression, as "/input" would match ".+". Kind regards On Sat, 23 Feb 2019, 11:00 , <basex-talk-request(a)mailman.uni-konstanz.de> wrote: > Send BaseX-Talk mailing list submissions to > basex-talk(a)mailman.uni-konstanz.de > > To subscribe or unsubscribe via the World Wide Web, visit > https://mailman.uni-konstanz.de/mailman/listinfo/basex-talk > or, via email, send a message with subject or body 'help' to > basex-talk-request(a)mailman.uni-konstanz.de > > You can reach the person managing the list at > basex-talk-owner(a)mailman.uni-konstanz.de > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of BaseX-Talk digest..." > > > Today's Topics: > > 1. RESTXQ and regexp (Marco Lettere) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 22 Feb 2019 12:05:29 +0100 > From: Marco Lettere <m.lettere(a)gmail.com> > To: BaseX <basex-talk(a)mailman.uni-konstanz.de> > Subject: [basex-talk] RESTXQ and regexp > Message-ID: <3f71e0bc-e16d-6c4d-6ee8-246a7cc7595c(a)gmail.com> > Content-Type: text/plain; charset=utf-8; format=flowed > > Hello all, > > according to the docs this should be possible: > > (: Matches all paths with "app" as first, a number as second, and > "order" as third segment :) > declare %rest:path("app/{$code=[0-9]+}/order") > ? function page:order($full-path) { ... }; > > (: Matches all other all paths starting with "app/" :) > declare %rest:path("app/{$path=.+}") > ? function page:others($path) { ... }; > > And it actually is... We are currently in the very unfortunate situation > where we need the following: > > (: Matches anything followed by /input :) > declare %rest:path("app/{$path=.+}/input") > ? function page:inputs($path) { ... }; > > (: Matches all other all paths starting with "app/" :) > declare %rest:path("app/{$path=.+}") > ? function page:others($path) { ... }; > > Unfortunately this makes all the calls to be redirected to the > page:others function ... is there a motivation behind it or could it be > possible to work around that? > > Thanks, > > Marco. > > > > End of BaseX-Talk Digest, Vol 110, Issue 29 > ******************************************* >

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read/write database locks
by Johannes Bauer 21 Feb '19

21 Feb '19

Hi, I need some input on how best to implement an updating database operation. I use BaseX within a Web Application and have RESTXQ service endpoints. One such service collects information from multiple databases and creates a new document (with the collected infos) in another database. The list of affected databases is dynamic and will be determined by the RESTXQ module. I'm afraid that, due to the missing static database information in the query, the service will lock *all* databases and because I have an updating operation the locks will be write locks. Depending on the amount of databases and their size, the operation might take some time (maybe even up to some minutes). And I don't want to have write locks for such a long period of time. I've also tried another approach: I use a non updating service that collects the data and then calls another RESTXQ service per HTTP request that makes the db update. This way I only have read locks on *all* databases and then a short single write lock on the modified db. But this did not work. The write call deadlocked. The first service probably has not released the read locks yet when the second service is called. I also tried to set the QUERYINFO option to see some lock information for my module, but I didn't get any output. Do you have any best practice on how to approach such a task? Best regards Johannes

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Stack Overflow: Try tail recursion
by Giuseppe G. A. Celano 20 Feb '19

20 Feb '19

I am writing a recursive function which is similar to the one here: https://stackoverflow.com/questions/27702718/to-add-values-in-cumulative-fo… Interestingly, local:sum() works if there are not many <book/>. However with 38000 book element I get the error "Stack Overflow: Try tail recursion". Any idea? Ciao, Giuseppe

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Release client libraries as packages?
by Jakub Pavlík 20 Feb '19

20 Feb '19

Hi, as a programmer occasionally working with BaseX I find the current "way of life" of the client libraries rather inconvenient: 1. nowadays most programming languages have some sort of packaging system (PHP's composer, Ruby's gems, Python's pip etc.), but the official BaseX client libraries are not released to these and I have to copy the files "manually" to each project using them 2. the libraries are rather minimal, lacking proper documentation and test suite. (Yes, they are arguably small, but still.) Have you considered releasing them as packages (which would, at least for PHP, require a separate git repository)? Or do you prefer to have individuals who have use for such packages to create and maintain them themselves? Regards, Jakub

2 1

Docker Volumes Permission denied
by Marie Starck 19 Feb '19

19 Feb '19

Hello everyone, So I am looking to add Docker to a BaseX webapp that is currently running properly on my local. In order to do that, I ran docker run -ti -d --publish 1984:1984 --publish 8984:8984 --volume ~/Projects/Architextus/basex-xquery-server/data:/srv/BaseXData --volume ~/Projects/Architextus/basex-xquery-server/webapp:/srv/BaseXWeb --volume ~/Projects/Architextus/basex-xquery-server/repo:/srv/BaseXRepo basex/basexhttp:8.6.4 And while localhost:8984 shows me the regular BaseX introduction page, none of the rest endpoints work and I get this error when I try to access the webapp from my localhost: Stopped at /srv/BaseXWeb/xqm/g-holismo.xqm, 136/24: [bxerr:BXDB0002] Resource "/srv/BaseXData/DITA-AppResources/tbl.basex (Permission denied)" not found. Stack Trace: - /srv/BaseXWeb/xqm/g-holismo.xqm, 11/10 I checked the permissions on my docker container and it seems that the basex user only has permissions on WEB-INF but none of the volumes, BaseXData, BaseXRepo and BaseXWeb, those are shown as belonging to user 1000. Has anyone experienced this before? Thank you for any help or tip you could provide, Marie

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