BaseX-Talk January 2021

basex-talk@mailman.uni-konstanz.de

15 participants
19 discussions

recursively used variables
by Rob Stapper 12 Aug '24

12 Aug '24

Hi, The code[1] below and send as attachment generates a error message: “Static variable depends on itself: $Q{http://www.w3.org/2005/xquery-local-functions}test”. I use these variables to refer to my private functions in my modules so I can easyly refer to them in a inheritance situation. It’s not a big problem for me but I was wondering if the error-triggering is justified or that it should work. [1]=========================================== declare variable $local:test := local:test#1 ; declare %private function local:test( $i) { if ( $i > 0) then $local:test( $i - 1) } ; $local:test( 10) =========================================== Kind regards, Rob Stapper Sent from Mail for Windows 10 -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

4 7

Autocomplete with RESTXQ
by Imsieke, Gerrit, le-tex 21 Jul '21

21 Jul '21

Hi List, Can anyone recommend a lightweight vanilla Javascript autocomplete library that can easily be used together with BaseX RESTXQ? Maybe even a readily cloneable/modifiable example? I don’t have a preference for a server response format. The RESTXQ service may be configured to return XML, JSON, or HTML No CORS restrictions need to be considered, the query host is the same that delivers the HTML pages. Gerrit

4 7

Package for system integration
by karlo＠fastmail.com 20 Jun '21

20 Jun '21

I have packaged basex in a way that I believe will be easier for integration with package managers. https://klarinet.kos.ovh/fossil/basex-root-install/uv/basex-9.4.3.tar.gz >From the root of that archive, you can build and install like this. make make install # as root The above will install to the prefix /usr/local. You can set a different prefix. Here is an example. make clean make PREFIX=/usr make PREFIX=/usr install # as root A secondary benefit of this package is the removal of the bash dependency. Could a package like this be distributed officially? If that is agreeable, I am happy to try incorporating this into the present build system. Here is a utility for preparing the package. It depends on sh and other Unix-like utilities. https://klarinet.kos.ovh/fossil/basex-root-install/dir?ci=tip With distinguished salutations, Kralj Karlo

3 6

BaseX 9.4.2: Tweaks & Fixes
by Christian Grün 02 Apr '21

02 Apr '21

Dear all, We have released another 9.4 late-summer maintenance release with new performance tweaks and minor bug fixes: http://basex.org In addition, we have started a new Wiki article on XQuery optimizations, which we plan to extend step by step: https://docs.basex.org/wiki/XQuery_Optimizations We are looking forward to your feedback; have fun, Your BaseX Team

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Options for ft:search
by Sebastian Zimmer 15 Mar '21

15 Mar '21

Hi, I'd like to request a feature concerning the ft:search method: An `lserror` option that works exactly like the global option `LSERROR`. It would be nice if we could set the maximum Levenshtein distance specifically for each fuzzy search without having to adjust the global option. Another question on ft:search: Is there a reason why it doesn't have a `case` option just like ft:contains has one? Best regards, Sebastian

2 3

Mapping and Basex
by Ben Pracht 29 Jan '21

29 Jan '21

Hi, I've seen this geo module and wondered what this is used for. I'd like to see if there's a way of extracting addresses from a website and their corresponding school. I could be way off but I was hoping this would be a start. Thanks, Ben

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Fwd: Securing All Endpoints
by Adam Law 27 Jan '21

27 Jan '21

Hi Christian, Thanks for the permissions pointer- it works well. As an aside I had to use let $vbFailure1 := ($perm?authorization != 'example' or exists( $perm?authorization )=false()) Rather than let $vbFailure1 := ($perm?authorization != 'example' ) To handle the case of no Authorisation. I am not sure why. I should be able to use request:cookie for ws (when I need to) which is great. I wasn't able to work out a catchall rest:path solution but it is not really important for me. Thanks again for the pointer. Adam On Mon, Jan 18, 2021 at 8:33 PM Christian Grün <christian.gruen(a)gmail.com> wrote: > You could have a look at the "Catch HTTP Errors" section in our > documentation. > > [1] https://docs.basex.org/wiki/RESTXQ#Error_Handling > > On Mon, Jan 18, 2021 at 1:30 PM Adam Law <adamjameslaw(a)gmail.com> wrote: > > > > Another thought - a 'catch all' path for fail2ban to catch attempted > accessess to undefined paths. > > I haven't tested this to see if there is such a thing in BaseX > > https://stackoverflow.com/questions/50282541/catch-all-url-in-golang > > > > On Mon, Jan 18, 2021 at 5:26 PM Christian Grün < > christian.gruen(a)gmail.com> wrote: > >> > >> Hi Adam, > >> > >> You could have a loot at our Permissions layer [1]. It can be used for > >> all kinds of checks, not only those specific to authentication. I > >> think we should generalize the concept in a future version of BaseX > >> and introduce additional post-hooks. > >> > >> Hope this helps? > >> Christian > >> > >> [1] https://docs.basex.org/wiki/Permissions > >> > >> > >> > >> On Mon, Jan 18, 2021 at 3:19 AM Adam Law <adamjameslaw(a)gmail.com> > wrote: > >> > > >> > Golang has great middleware functionality for endpoints that allows a > person to readily secure all of them. I was wondering there would be > anyway doing similar in BaseX for restxq & websockets. For example by > requiring all requests to have a particular query parameter (very basic > example). ... to protect say against browser / javascript port scanning. > >> > > >> > Eg > https://stackoverflow.com/questions/26204485/gorilla-mux-custom-middleware > and check that request contains a particular parameter (very basic security) > >> > > >> > It seems that I have to secure each endpoint individually. > >> > > >> > Adam >

2 4

Shrinking view in Manage Database Dialog
by Markus Schmid 27 Jan '21

27 Jan '21

Hallo in Basex v9.4.5 im Dialog Manage Database wird die linke View zusammengeschrumpft wenn die rechte Detail View wegen langer Pfad- oder Datenbanknamen viel Platz braucht. Die Views ändern die Breite während man die Einträge in der Liste der Datenbanken durchläuft und auswählt. Beides nervt leicht. Freundliche Grüße Markus S.

2 2

cross-platform file name parameters
by Graydon Saunders 26 Jan '21

26 Jan '21

Hello -- So I'm on a Linux box and my colleague is on a Windows system. We're both using a query that takes before and after versions of a file, converts each to a single string, and writes that back out as two additional files. (This exists to check if we still have all the words in the same order between before and after.) There must be a sensible way to parameterize the file names so they can be relative to the query on both platforms/easily loaded from a file/something that isn't hand-editing a variable (external or not), but I can't think of it. What's the sensible way to do this? Thanks! Graydon

3 2

[Configuration improvements] Separate client and server config, stop overwriting config files
by Volodymyr Prokopyuk 26 Jan '21

26 Jan '21

Hello the BaseX team, First of all I'm really impressed with the quality of the BaseX XML database. I'd particularly highlight the high compliance with the standards XQuery, XPath and the outstanding performance! Thank you very much for the great product! I'm new to the system and I've faced several configuration deficiencies while trying to configure the BaseX database to fit my needs. What follows is my use case (I hope it is a basic and classical one required by much wider audience), the configuration problems I've faced (I hope these can be easily solved by extending your current implementation) and my proposal to solve the above mentioned configuration problems (I hope this will further improve the quality of your product). *My use case (access the basexserver run as a systemd service via the basexclient)* - I've installed the basex package on Manjaro (Arch linux) into /usr/share/java/basex/ - I want to run the basexserver as a systemd service under the already created basex system user (see the attached basex.server unit file) - I want to store the XML databases and the BaseX logs under /var/lib/basex/data /var/lib/basex/log respectively - I want to manage the basexserver configuration (namely DBPATH, LOGPATH, SERVERPORT) separately from the basexclient configuration (namely HOST, PORT, USER, PASSWORD) in a separate files under /etc/basex and ~/ respectively. I do not want to get my configuration overwritten with unnecessary default options that are already in the system and so clutter my clean just-what-you-need configuration files - I want to manage the XML databases and execute queries against the server using the basexclient from my console by providing XQuery command and queries in a file *Configuration problems (mixed config for client and server in a single .basex file under hardly linked home directory)* - My .basex file mixes server and client configuration in one single file so I cannot separate the configuration into server-related at /etc/basex and client-retated at ~/ - My .basex file gets overwritten with unnecessary default options that clutter my minimal and clean configuration - When I start the basexclient a new .basex configuration file is created in the current working directory. I start the basexclient from many different direcotries, but I want to have the basexclient configuration only in my home ~/ directory - It seems that the location of the .basex file is hardly linked to the home directory forcing me to place data, log and config directories under a single home directory. I want to manage my data in /var/lib/basex/data, my logs in /var/lib/basex/log and my server and client configuration in /etc/basex and ~/ respectively - I cannot find any way (via environment variables or command line options) to instruct both the basexserver and the basexclient to look for the configuration file .basex *Proposal to improve configuration* - Do not overwrite the user-provided configuration files with unnecessary default options that are already in the system or at least use a different file (e. g. .basex-default) - Separate the server-related configuration from the client-related configuration into different files (e. g. .basexserver, .basexclient) - Do not mandate the location of configuration files to be under the home directory because there are different aspects of database management that are usually managed in different directories with different policies and quotas (e. g. data, log, client and server config) - Provide separate options for basexserver and basexclient to locate the corresponding configuration file (e. g. via environment variables BASEX_SERVER_CONFIG, BASEX_CLIENT_CONFIG or command line options -server-config, -client-config) - In order to introduce the proposed improvement you can keep your current implementation unchanged (following the open-closed principle) and just extend the implementation with the alternative locations for the separate configuration files via environment variables or command line options. The only change that is required is to stop overwriting the user-provided configuration files with the default options Can the above described use case be configured with the current implementation of the configuration management? Thank you in advance! I'm open to further discussion and collaboration mostly on the design side to get these improvements to work for all other use cases not covered here. Thank you, Vlad

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BaseX-Talk January 2021