X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/341853e378bfec1ccec2c11e5622dbd7eb7dfee3..271aba3cc2efb48d8c0720a80a64f7845124cba6:/blog/index.html diff --git a/blog/index.html b/blog/index.html index e6360b98a4..1cd5d5e3f2 100644 --- a/blog/index.html +++ b/blog/index.html @@ -20,37 +20,64 @@
-
New and improved Frikanalen Kodi addon version 0.0.3
-
8th November 2018
-

If you read my blog regularly, you probably know I am involved in -running and developing the Norwegian -TV channel Frikanalen. It is an open channel, allowing everyone -in Norway to publish videos on a TV channel with national coverage. -You can think of it as Youtube for national television. -In addition to distribution on RiksTV and Uninett, Frikanalen is also -available as a Kodi addon. The last few days I have updated the code -to add more features. A -new -and improved version 0.0.3 Frikanalen addon was just made -available via the Kodi repositories. This new version include a -option to browse videos by category, as well as free text search -in the video archive. It will now also show the video duration in the -video lists, which were missing earlier. A new and experimental -link to the HD video stream currently being worked on is provided, for -those that want to see what the CasparCG -output look like. The alternative is the SD video stream, generated -using MLT. CasparCG is controlled by our -mltplayout -server which instead of talking to mlt is giving PLAY instructions -to the CasparCG server when it is time to start a new program.

- -

By now, you are probably wondering what kind of content is being -played on the video. These days, it is filled with technical -presentations like those from NUUG, -Debconf, Makercon, and TED, -but there are also some periods with -EMPT TV and -P7. +

+
19th June 2019
+

Some years ago, in 2016, I +wrote +for the first time about the Ring peer to peer messaging system. +It would provide messaging without any central server coordinating the +system and without requiring all users to register a phone number or +own a mobile phone. Back then, I could not get it to work, and put it +aside until it had seen more development. A few days ago I decided to +give it another try, and am happy to report that this time I am able +to not only send and receive messages, but also place audio and video +calls. But only if UDP is not blocked into your network.

+ +

The Ring system changed name earlier this year to +Jami. I +tried doing web search for 'ring' when I discovered it for the first +time, and can only applaud this change as it is impossible to find +something called Ring among the noise of other uses of that word. Now +you can search for 'jami' and this client and +the Jami system is the first hit at +least on duckduckgo.

+ +

Jami will by default encrypt messages as well as audio and video +calls, and try to send them directly between the communicating parties +if possible. If this proves impossible (for example if both ends are +behind NAT), it will use a central SIP TURN server maintained by the +Jami project. Jami can also be a normal SIP client. If the SIP +server is unencrypted, the audio and video calls will also be +unencrypted. This is as far as I know the only case where Jami will +do anything without encryption.

+ +

Jami is available for several platforms: Linux, Windows, MacOSX, +Android, iOS, and Android TV. It is included in Debian already. Jami +also work for those using F-Droid without any Google connections, +while Signal do not. +The +protocol is described in the Ring project wiki. The system uses a +distributed hash table (DHT) system (similar to BitTorrent) running +over UDP. On one of the networks I use, I discovered Jami failed to +work. I tracked this down to the fact that incoming UDP packages +going to ports 1-49999 were blocked, and the DHT would pick a random +port and end up in the low range most of the time. After talking to +the developers, I solved this by enabling the dhtproxy in the +settings, thus using TCP to talk to a central DHT proxy instead of + +peering directly with others. I've been told the developers are +working on allowing DHT to use TCP to avoid this problem. I also ran +into a problem when trying to talk to the version of Ring included in +Debian Stable (Stretch). Apparently the protocol changed between +beta2 and the current version, making these clients incompatible. +Hopefully the protocol will not be made incompatible in the +future.

+ +

It is worth noting that while looking at Jami and its features, I +came across another communication platform I have not tested yet. The +Tox protocol +and family of Tox clients. It might +become the topic of a future blog post.

As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -59,7 +86,7 @@ activities, please send Bitcoin donations to my address

@@ -67,42 +94,92 @@ activities, please send Bitcoin donations to my address
- -
1st November 2018
-

As part of my involvement in -the Nikita -archive API project, I've been importing a fairly large lump of -emails into a test instance of the archive to see how well this would -go. I picked a subset of my -notmuch email database, all public emails sent to me via -@lists.debian.org, giving me a set of around 216 000 emails to import. -In the process, I had a look at the various attachments included in -these emails, to figure out what to do with attachments, and noticed -that one of the most common attachment formats do not have -an -official MIME type registered with IANA/IETF. The output from -diff, ie the input for patch, is on the top 10 list of formats -included in these emails. At the moment people seem to use either -text/x-patch or text/x-diff, but neither is officially registered. It -would be better if one official MIME type were registered and used -everywhere.

- -

To try to get one official MIME type for these files, I've brought -up the topic on -the -media-types mailing list. If you are interested in discussion -which MIME type to use as the official for patch files, or involved in -making software using a MIME type for patches, perhaps you would like -to join the discussion?

- -

As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

+ +
11th June 2019
+

The first book I published, +Free Culture by Lawrence +Lessig, is still selling a few copies. Not a lot, but enough to +have contributed slightly over $500 to the Creative Commons Corporation +so far. All the profit is sent there. Most books are still sold via +Amazon (83 copies), with Ingram second (49) and Lulu (12) and Machette (7) as +minor channels. Bying directly from Lulu bring the largest cut to +Creative Commons. The English Edition sold 80 copies so far, the +French 59 copies, and Norwegian only 8 copies. Nothing impressive, +but nice to see the work we put down is still being appreciated. The +ebook edition is available for free from +Github.

+ + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + + +
Title / languageQuantity
2016 jan-jun2016 jul-dec2017 jan-jun2017 jul-dec2018 jan-jun2018 jul-dec2019 jan-may
Culture Libre / French361911767
Fri kultur / Norwegian7100000
Free Culture / English1427169373
Total24343520101310
+ +

It is fun to see the French edition being more popular than the +English one.

+ +

If you would like to translate and publish the book in your native +language, I would be happy to help make it happen. Please get in +touch.

@@ -110,70 +187,27 @@ activities, please send Bitcoin donations to my address
- -
22nd October 2018
-

- -

My current home stereo is a patchwork of various pieces I got on -flee markeds over the years. It is amazing what kind of equipment -show up there. I've been wondering for a while if it was possible to -measure how well this equipment is working together, and decided to -see how far I could get using free software. After trawling the web I -came across an article from DIY Audio and Video on -Speaker -Testing and Analysis describing how to test speakers, and it listing -several software options, among them -AUDio MEasurement -System (AUDMES). It is the only free software system I could find -focusing on measuring speakers and audio frequency response. In the -process I also found an interesting article from NOVO on -Understanding -Speaker Specifications and Frequency Response and an article from -ecoustics on -Understanding -Speaker Frequency Response, with a lot of information on what to -look for and how to interpret the graphs. Armed with this knowledge, -I set out to measure the state of my speakers.

- -

The first hurdle was that AUDMES hadn't seen a commit for 10 years -and did not build with current compilers and libraries. I got in -touch with its author, who no longer was spending time on the program -but gave me write access to the subversion repository on Sourceforge. -The end result is that now the code build on Linux and is capable of -saving and loading the collected frequency response data in CSV -format. The application is quite nice and flexible, and I was able to -select the input and output audio interfaces independently. This made -it possible to use a USB mixer as the input source, while sending -output via my laptop headphone connection. I lacked the hardware and -cabling to figure out a different way to get independent cabling to -speakers and microphone.

- -

Using this setup I could see how a large range of high frequencies -apparently were not making it out of my speakers. The picture show -the frequency response measurement of one of the speakers. Note the -frequency lines seem to be slightly misaligned, compared to the CSV -output from the program. I can not hear several of these are high -frequencies, according to measurement from -Free Hearing Test -Software, an freeware system to measure your hearing (still -looking for a free software alternative), so I do not know if they are -coming out out the speakers. I thus do not quite know how to figure -out if the missing frequencies is a problem with the microphone, the -amplifier or the speakers, but I managed to rule out the audio card in my -PC by measuring my Bose noise canceling headset using its own -microphone. This setup was able to see the high frequency tones, so -the problem with my stereo had to be in the amplifier or speakers.

- -

Anyway, to try to role out one factor I ended up picking up a new -set of speakers at a flee marked, and these work a lot better than the -old speakers, so I guess the microphone and amplifier is OK. If you -need to measure your own speakers, check out AUDMES. If more people -get involved, perhaps the project could become good enough to -include in Debian? And if -you know of some other free software to measure speakers and amplifier -performance, please let me know. I am aware of the freeware option -REW, but I want something -that can be developed also when the vendor looses interest.

+ +
4th June 2019
+

Just 15 days ago, +I +mentioned my submission to IANA to register an official MIME type +for the SOSI vector map format. This morning, just an hour ago, I was +notified that +the +MIME type "text/vnd.sosi" is registered for this format. In +addition to this registration, my +file(1) +patch for a pattern matching rule for SOSI files has been accepted +into the official source of that program (pending a new release), and +I've been told by the team behind +PRONOM that +the SOSI format will be included in the next release of PRONOM, which +they plan to release this summer around July.

+ +

I am very happy to see all of this fall into place, for use by +the +Noark 5 Tjenestegrensesnitt implementations.

As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -182,7 +216,7 @@ activities, please send Bitcoin donations to my address

@@ -190,58 +224,67 @@ activities, please send Bitcoin donations to my address
- -
21st October 2018
-

Bittorrent is as far as I know, currently the most efficient way to -distribute content on the Internet. It is used all by all sorts of -content providers, from national TV stations like -NRK, Linux distributors like -Debian and -Ubuntu, and of course the -Internet archive. - -

Almost a month ago -a new -package adding Bittorrent support to VLC became available in -Debian testing and unstable. To test it, simply install it like -this:

- -

-apt install vlc-plugin-bittorrent
-

- -

Since the plugin was made available for the first time in Debian, -several improvements have been made to it. In version 2.2-4, now -available in both testing and unstable, a desktop file is provided to -teach browsers to start VLC when the user click on torrent files or -magnet links. The last part is thanks to me finally understanding -what the strange x-scheme-handler style MIME types in desktop files -are used for. By adding x-scheme-handler/magnet to the MimeType entry -in the desktop file, at least the browsers Firefox and Chromium will -suggest to start VLC when selecting a magnet URI on a web page. The -end result is that now, with the plugin installed in Buster and Sid, -one can visit any -Internet -Archive page with movies using a web browser and click on the -torrent link to start streaming the movie.

- -

Note, there is still some misfeatures in the plugin. One is the -fact that it will hang and -block VLC -from exiting until the torrent streaming starts. Another is the -fact that it -will pick -and play a random file in a multi file torrent. This is not -always the video file you want. Combined with the first it can be a -bit hard to get the video streaming going. But when it work, it seem -to do a good job.

- -

For the Debian packaging, I would love to find a good way to test -if the plugin work with VLC using autopkgtest. I tried, but do not -know enough of the inner workings of VLC to get it working. For now -the autopkgtest script is only checking if the .so file was -successfully loaded by VLC. If you have any suggestions, please -submit a patch to the Debian bug tracking system.

+ +
2nd June 2019
+

A while back a college and friend from Debian and the Skolelinux / +Debian Edu project approached me, asking if I knew someone that might +be interested in helping out with a technology project he was running +as a teacher at L'école +franco-danoise - the Danish-French school and kindergarden. The +kids were building robots, rovers. The story behind it is to build a +rover for use +on +the dark side of the moon, and remote control it. As travel cost +was a bit high for the final destination, and they wanted to test the +concept first, he was looking for volunteers to host a rover for the +kids to control in a foreign country. I ended up volunteering as a +host, and last week the rover arrived. It took a while to arrive +after it was +built and shipped, because of customs confusion. Luckily we were +able fix it quickly with help from my colleges at work.

+ +

This is what it looked like when the rover arrived. Note the cute +eyes looking up on me from the wrapping

+ + + + + +

Once the robot arrived, we needed to track +down batteries and figure out how to build custom firmware for it with +the appropriate wifi settings. I asked a friend if I could get two +18650 batteries from his pile of Tesla batteries (he had them from the +wrack of a crashed Tesla), so now the rover is running on Tesla +batteries.

+ +

Building +the rover +firmware proved a bit harder, as the code did not work out of the +box with the Arduino IDE package in Debian Buster. I suspect this is +due to a unsolved + license problem +with arduino blocking Debian from upgrading to the latest version. +In the end we gave up debugging why the IDE failed to find the +required libraries, and ended up using the Arduino Makefile from the +arduino-mk Debian +package instead. Unfortunately the camera library is missing from +the Arduino environment in Debian, so we disabled the camera support +for the first firmware build, to get something up and running. With +this reduced firmware, the robot could be controlled via the +controller server, driving around and measuring distance using its +internal acoustic sensor.

+ +

Next, With some help from my friend in Denmark, which checked in the +camera library into the gitlab repository for me to use, we were able +to build a new and more complete version of the firmware, and the +robot is now up and running. This is what the "commander" web page +look like after taking a measurement and a snapshot:

+ + + +

If you want to learn more about this project, you can check out the +The +Dark Side Challenge Hackaday web pages.

As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -250,7 +293,7 @@ activities, please send Bitcoin donations to my address

- Tags: english, verkidetfri, video. + Tags: english, robot.
@@ -258,64 +301,57 @@ activities, please send Bitcoin donations to my address
- -
18th October 2018
-

This morning, the new release of the +

+
22nd May 2019
+

This morning, a new release of Nikita Noark 5 core project was -announced -on the project mailing list. The free software solution is an -implementation of the Norwegian archive standard Noark 5 used by -government offices in Norway. These were the changes in version 0.2 -since version 0.1.1 (from NEWS.md): +announced +on the project mailing list. The Nikita free software solution is +an implementation of the Norwegian archive standard Noark 5 used by +government offices in Norway. These were the changes in version 0.4 +since version 0.3, see the email link above for links to a demo site:

    -
  • Fix typos in REL names
  • -
  • Tidy up error message reporting
  • -
  • Fix issue where we used Integer.valueOf(), not Integer.getInteger()
  • -
  • Change some String handling to StringBuffer
  • -
  • Fix error reporting
  • -
  • Code tidy-up
  • -
  • Fix issue using static non-synchronized SimpleDateFormat to avoid - race conditions
  • -
  • Fix problem where deserialisers were treating integers as strings
  • -
  • Update methods to make them null-safe
  • -
  • Fix many issues reported by coverity
  • -
  • Improve equals(), compareTo() and hash() in domain model
  • -
  • Improvements to the domain model for metadata classes
  • -
  • Fix CORS issues when downloading document
  • -
  • Implementation of case-handling with registryEntry and document upload
  • -
  • Better support in Javascript for OPTIONS
  • -
  • Adding concept description of mail integration
  • -
  • Improve setting of default values for GET on ny-journalpost
  • -
  • Better handling of required values during deserialisation
  • -
  • Changed tilknyttetDato (M620) from date to dateTime
  • -
  • Corrected some opprettetDato (M600) (de)serialisation errors.
  • -
  • Improve parse error reporting.
  • -
  • Started on OData search and filtering.
  • -
  • Added Contributor Covenant Code of Conduct to project.
  • -
  • Moved repository and project from Github to Gitlab.
  • -
  • Restructured repository, moved code into src/ and web/.
  • -
  • Updated code to use Spring Boot version 2.
  • -
  • Added support for OAuth2 authentication.
  • -
  • Fixed several bugs discovered by Coverity.
  • -
  • Corrected handling of date/datetime fields.
  • -
  • Improved error reporting when rejecting during deserializatoin.
  • -
  • Adjusted default values provided for ny-arkivdel, ny-mappe, - ny-saksmappe, ny-journalpost and ny-dokumentbeskrivelse.
  • -
  • Several fixes for korrespondansepart*.
  • -
  • Updated web GUI: -
      -
    • Now handle both file upload and download.
    • -
    • Uses new OAuth2 authentication for login.
    • -
    • Forms now fetches default values from API using GET.
    • -
    • Added RFC 822 (email), TIFF and JPEG to list of possible file formats.
    • -
  • -
-

The changes and improvements are extensive. Running diffstat on -the changes between git tab 0.1.1 and 0.2 show 1098 files changed, -108666 insertions(+), 54066 deletions(-).

+
  • Roll out OData handling to all endpoints where applicable
  • +
  • Changed the relation key for "ny-journalpost" to the official one.
  • +
  • Better link generation on outgoing links.
  • +
  • Tidy up code and make code and approaches more consistent throughout + the codebase
  • +
  • Update rels to be in compliance with updated version in the + interface standard
  • +
  • Avoid printing links on empty objects as they can't have links
  • +
  • Small bug fixes and improvements
  • +
  • Start moving generation of outgoing links to @Service layer so access + control can be used when generating links
  • +
  • Log exception that was being swallowed so it's traceable
  • +
  • Fix name mapping problem
  • +
  • Update templated printing so templated should only be printed if it + is set true. Requires more work to roll out across entire + application.
  • +
  • Remove Record->DocumentObject as per domain model of n5v4
  • +
  • Add ability to delete lists filtered with OData
  • +
  • Return NO_CONTENT (204) on delete as per interface standard
  • +
  • Introduce support for ConstraintViolationException exception
  • +
  • Make Service classes extend NoarkService
  • +
  • Make code base respect X-Forwarded-Host, X-Forwarded-Proto and + X-Forwarded-Port
  • +
  • Update CorrespondencePart* code to be more in line with Single + Responsibility Principle
  • +
  • Make package name follow directory structure
  • +
  • Make sure Document number starts at 1, not 0
  • +
  • Fix isues discovered by FindBugs
  • +
  • Update from Date to ZonedDateTime
  • +
  • Fix wrong tablename
  • +
  • Introduce Service layer tests
  • +
  • Improvements to CorrespondencePart
  • +
  • Continued work on Class / Classificationsystem
  • +
  • Fix feature where authors were stored as storageLocations
  • +
  • Update HQL builder for OData
  • +
  • Update OData search capability from webpage
  • + +

    If free and open standardized archiving API sound interesting to you, please contact us on IRC @@ -331,7 +367,7 @@ activities, please send Bitcoin donations to my address

    @@ -339,102 +375,50 @@ activities, please send Bitcoin donations to my address
    - -
    8th October 2018
    -

    I have earlier covered the basics of trusted timestamping using the -'openssl ts' client. See blog post for -2014, -2016 -and -2017 -for those stories. But some times I want to integrate the timestamping -in other code, and recently I needed to integrate it into Python. -After searching a bit, I found -the -rfc3161 library which seemed like a good fit, but I soon -discovered it only worked for python version 2, and I needed something -that work with python version 3. Luckily I next came across -the rfc3161ng library, -a fork of the original rfc3161 library. Not only is it working with -python 3, it have fixed a few of the bugs in the original library, and -it has an active maintainer. I decided to wrap it up and make it -available in -Debian, and a few days ago it entered Debian unstable and testing.

    - -

    Using the library is fairly straight forward. The only slightly -problematic step is to fetch the required certificates to verify the -timestamp. For some services it is straight forward, while for others -I have not yet figured out how to do it. Here is a small standalone -code example based on of the integration tests in the library code:

    - -
    -#!/usr/bin/python3
    -
    -"""
    -
    -Python 3 script demonstrating how to use the rfc3161ng module to
    -get trusted timestamps.
    -
    -The license of this code is the same as the license of the rfc3161ng
    -library, ie MIT/BSD.
    -
    -"""
    -
    -import os
    -import pyasn1.codec.der
    -import rfc3161ng
    -import subprocess
    -import tempfile
    -import urllib.request
    -
    -def store(f, data):
    -    f.write(data)
    -    f.flush()
    -    f.seek(0)
    -
    -def fetch(url, f=None):
    -    response = urllib.request.urlopen(url)
    -    data = response.read()
    -    if f:
    -        store(f, data)
    -    return data
    -
    -def main():
    -    with tempfile.NamedTemporaryFile() as cert_f,\
    -    	 tempfile.NamedTemporaryFile() as ca_f,\
    -    	 tempfile.NamedTemporaryFile() as msg_f,\
    -    	 tempfile.NamedTemporaryFile() as tsr_f:
    -
    -        # First fetch certificates used by service
    -        certificate_data = fetch('https://freetsa.org/files/tsa.crt', cert_f)
    -        ca_data_data = fetch('https://freetsa.org/files/cacert.pem', ca_f)
    -
    -        # Then timestamp the message
    -        timestamper = \
    -            rfc3161ng.RemoteTimestamper('http://freetsa.org/tsr',
    -                                        certificate=certificate_data)
    -        data = b"Python forever!\n"
    -        tsr = timestamper(data=data, return_tsr=True)
    -
    -        # Finally, convert message and response to something 'openssl ts' can verify
    -        store(msg_f, data)
    -        store(tsr_f, pyasn1.codec.der.encoder.encode(tsr))
    -        args = ["openssl", "ts", "-verify",
    -                "-data", msg_f.name,
    -	        "-in", tsr_f.name,
    -		"-CAfile", ca_f.name,
    -                "-untrusted", cert_f.name]
    -        subprocess.check_call(args)
    -
    -if '__main__' == __name__:
    -   main()
    -
    - -

    The code fetches the required certificates, store them as temporary -files, timestamp a simple message, store the message and timestamp to -disk and ask 'openssl ts' to verify the timestamp. A timestamp is -around 1.5 kiB in size, and should be fairly easy to store for future -use.

    + +
    20th May 2019
    +

    As part of my involvement in the work to +standardise +a REST based API for Noark 5, the Norwegian archiving standard, I +spent some time the last few months to try to register a +MIME type +and PRONOM +code for the SOSI file format. The background is that there is a +set of formats approved for long term storage and archiving in Norway, +and among these formats, SOSI is the only format missing a MIME type +and PRONOM code.

    + +

    What is SOSI, you might ask? To quote Wikipedia: SOSI is short for +Samordnet Opplegg for Stedfestet Informasjon (literally "Coordinated +Approach for Spatial Information", but more commonly expanded in +English to Systematic Organization of Spatial Information). It is a +text based file format for geo-spatial vector information used in +Norway. Information about the SOSI format can be found in English +from Wikipedia. The +specification is available in Norwegian from +the +Norwegian mapping authority. The SOSI standard, which originated +in the beginning of nineteen eighties, was the inspiration and formed the +basis for the XML based +Geography +Markup Language.

    + +

    I have so far written +a pattern matching +rule for the file(1) unix tool to recognize SOSI files, submitted +a request to the PRONOM project to have a PRONOM ID assigned to the +format (reference TNA1555078202S60), and today send a request to IANA +to register the "text/vnd.sosi" MIME type for this format (referanse +IANA +#1143144). If all goes well, in a few months, anyone implementing +the Noark 5 Tjenestegrensesnitt API spesification should be able to +use an official MIME type and PRONOM code for SOSI files. In +addition, anyone using SOSI files on Linux should be able to +automatically recognise the format and web sites handing out SOSI +files can begin providing a more specific MIME type. So far, SOSI +files has been handed out from web sites using the +"application/octet-stream" MIME type, which is just a nice way of +stating "I do not know". Soon, we will know. :)

    As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -443,7 +427,7 @@ activities, please send Bitcoin donations to my address

    - Tags: english, sikkerhet. + Tags: english, kart, noark5, standard.
    @@ -451,59 +435,146 @@ activities, please send Bitcoin donations to my address
    - -
    4th October 2018
    -

    A few days, I rescued a Windows victim over to Debian. To try to -rescue the remains, I helped set up automatic sync with Google Drive. -I did not find any sensible Debian package handling this -automatically, so I rebuild the grive2 source from -the Ubuntu UPD8 PPA to do the -task and added a autostart desktop entry and a small shell script to -run in the background while the user is logged in to do the sync. -Here is a sketch of the setup for future reference.

    - -

    I first created ~/googledrive, entered the directory and -ran 'grive -a' to authenticate the machine/user. Next, I -created a autostart hook in ~/.config/autostart/grive.desktop -to start the sync when the user log in:

    - -

    -[Desktop Entry]
    -Name=Google drive autosync
    -Type=Application
    -Exec=/home/user/bin/grive-sync
    -

    - -

    Finally, I wrote the ~/bin/grive-sync script to sync -~/googledrive/ with the files in Google Drive.

    - -

    -#!/bin/sh
    -set -e
    -cd ~/
    -cleanup() {
    -    if [ "$syncpid" ] ; then
    -        kill $syncpid
    -    fi
    +      
    +      
    25th March 2019
    +

    As part of my involvement with the +Nikita +Noark 5 core project, I have been proposing improvements to the +API specification created by The +National Archives of Norway and helped migrating the text from a +version control system unfriendly binary format (docx) to Markdown in +git. Combined with the migration to a public git repository (on +github), this has made it possible for anyone to suggest improvement +to the text.

    + +

    The specification is filled with UML diagrams. I believe the +original diagrams were modelled using Sparx Systems Enterprise +Architect, and exported as EMF files for import into docx. This +approach make it very hard to track changes using a version control +system. To improve the situation I have been looking for a good text +based UML format with associated command line free software tools on +Linux and Windows, to allow anyone to send in corrections to the UML +diagrams in the specification. The tool must be text based to work +with git, and command line to be able to run it automatically to +generate the diagram images. Finally, it must be free software to +allow anyone, even those that can not accept a non-free software +license, to contribute.

    + +

    I did not know much about free software UML modelling tools when I +started. I have used dia and inkscape for simple modelling in the +past, but neither are available on Windows, as far as I could tell. I +came across a nice +list +of text mode uml tools, and tested out a few of the tools listed +there. The PlantUML tool seemed +most promising. After verifying that the packages +is available in +Debian and found its +Java source under a GPL license on github, I set out to test if it +could represent the diagrams we needed, ie the ones currently in +the +Noark 5 Tjenestegrensesnitt specification. I am happy to report +that it could represent them, even thought it have a few warts here +and there.

    + +

    After a few days of modelling I completed the task this weekend. A +temporary link to the complete set of diagrams (original and from +PlantUML) is available in +the +github issue discussing the need for a text based UML format, but +please note I lack a sensible tool to convert EMF files to PNGs, so +the "original" rendering is not as good as the original was in the +publised PDF.

    + +

    Here is an example UML diagram, showing the core classes for +keeping metadata about archived documents:

    + +
    +@startuml
    +skinparam classAttributeIconSize 0
    +
    +!include media/uml-class-arkivskaper.iuml
    +!include media/uml-class-arkiv.iuml
    +!include media/uml-class-klassifikasjonssystem.iuml
    +!include media/uml-class-klasse.iuml
    +!include media/uml-class-arkivdel.iuml
    +!include media/uml-class-mappe.iuml
    +!include media/uml-class-merknad.iuml
    +!include media/uml-class-registrering.iuml
    +!include media/uml-class-basisregistrering.iuml
    +!include media/uml-class-dokumentbeskrivelse.iuml
    +!include media/uml-class-dokumentobjekt.iuml
    +!include media/uml-class-konvertering.iuml
    +!include media/uml-datatype-elektronisksignatur.iuml
    +
    +Arkivstruktur.Arkivskaper "+arkivskaper 1..*" <-o "+arkiv 0..*" Arkivstruktur.Arkiv
    +Arkivstruktur.Arkiv o--> "+underarkiv 0..*" Arkivstruktur.Arkiv
    +Arkivstruktur.Arkiv "+arkiv 1" o--> "+arkivdel 0..*" Arkivstruktur.Arkivdel
    +Arkivstruktur.Klassifikasjonssystem "+klassifikasjonssystem [0..1]" <--o "+arkivdel 1..*" Arkivstruktur.Arkivdel
    +Arkivstruktur.Klassifikasjonssystem "+klassifikasjonssystem [0..1]" o--> "+klasse 0..*" Arkivstruktur.Klasse
    +Arkivstruktur.Arkivdel "+arkivdel 0..1" o--> "+mappe 0..*" Arkivstruktur.Mappe
    +Arkivstruktur.Arkivdel "+arkivdel 0..1" o--> "+registrering 0..*" Arkivstruktur.Registrering
    +Arkivstruktur.Klasse "+klasse 0..1" o--> "+mappe 0..*" Arkivstruktur.Mappe
    +Arkivstruktur.Klasse "+klasse 0..1" o--> "+registrering 0..*" Arkivstruktur.Registrering
    +Arkivstruktur.Mappe --> "+undermappe 0..*" Arkivstruktur.Mappe
    +Arkivstruktur.Mappe "+mappe 0..1" o--> "+registrering 0..*" Arkivstruktur.Registrering
    +Arkivstruktur.Merknad "+merknad 0..*" <--* Arkivstruktur.Mappe
    +Arkivstruktur.Merknad "+merknad 0..*" <--* Arkivstruktur.Dokumentbeskrivelse
    +Arkivstruktur.Basisregistrering -|> Arkivstruktur.Registrering
    +Arkivstruktur.Merknad "+merknad 0..*" <--* Arkivstruktur.Basisregistrering
    +Arkivstruktur.Registrering "+registrering 1..*" o--> "+dokumentbeskrivelse 0..*" Arkivstruktur.Dokumentbeskrivelse
    +Arkivstruktur.Dokumentbeskrivelse "+dokumentbeskrivelse 1" o-> "+dokumentobjekt 0..*" Arkivstruktur.Dokumentobjekt
    +Arkivstruktur.Dokumentobjekt *-> "+konvertering 0..*" Arkivstruktur.Konvertering
    +Arkivstruktur.ElektroniskSignatur -[hidden]-> Arkivstruktur.Dokumentobjekt
    +@enduml
    +
    + +

    The format is quite +compact, with little redundant information. The text expresses +entities and relations, and there is little layout related fluff. One +can reuse content by using include files, allowing for consistent +naming across several diagrams. The include files can be standalone +PlantUML too. Here is the content of +media/uml-class-arkivskaper.iuml:

    + +
    +@startuml
    +class Arkivstruktur.Arkivskaper  {
    +  +arkivskaperID : string
    +  +arkivskaperNavn : string
    +  +beskrivelse : string [0..1]
     }
    -trap cleanup EXIT INT QUIT
    -/usr/lib/grive/grive-sync.sh listen googledrive 2>&1 | sed "s%^%$0:%" &
    -syncpdi=$!
    -while true; do
    -    if ! xhost >/dev/null 2>&1 ; then
    -        echo "no DISPLAY, exiting as the user probably logged out"
    -        exit 1
    -    fi
    -    if [ ! -e /run/user/1000/grive-sync.sh_googledrive ] ; then
    -        /usr/lib/grive/grive-sync.sh sync googledrive
    -    fi
    -    sleep 300
    -done 2>&1 | sed "s%^%$0:%"
    -

    - -

    Feel free to use the setup if you want. It can be assumed to be -GNU GPL v2 licensed (or any later version, at your leisure), but I -doubt this code is possible to claim copyright on.

    +@enduml + + +

    This is what the complete diagram for the PlantUML notation above +look like:

    + +

    + +

    A cool feature of PlantUML is that the generated PNG files include +the entire original source diagram as text. The source (with include +statements expanded) can be extracted using for example +exiftool. Another cool feature is that parts of the entities +can be hidden after inclusion. This allow to use include files with +all attributes listed, even for UML diagrams that should not list any +attributes.

    + +

    The diagram also show some of the warts. Some times the layout +engine place text labels on top of each other, and some times it place +the class boxes too close to each other, not leaving room for the +labels on the relationship arrows. The former can be worked around by +placing extra newlines in the labes (ie "\n"). I did not do it here +to be able to demonstrate the issue. I have not found a good way +around the latter, so I normally try to reduce the problem by changing +from vertical to horizontal links to improve the layout.

    + +

    All in all, I am quite happy with PlantUML, and very impressed with +how quickly its lead developer responds to questions. So far I got an +answer to my questions in a few hours when I send an email. I +definitely recommend looking at PlantUML if you need to make UML +diagrams. Note, PlantUML can draw a lot more than class relations. +Check out the documention for a complete list. :)

    As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -512,7 +583,7 @@ activities, please send Bitcoin donations to my address

    @@ -520,152 +591,47 @@ activities, please send Bitcoin donations to my address
    - -
    29th September 2018
    -

    It would come as no surprise to anyone that I am interested in -bitcoins and virtual currencies. I've been keeping an eye on virtual -currencies for many years, and it is part of the reason a few months -ago, I started writing a python library for collecting currency -exchange rates and trade on virtual currency exchanges. I decided to -name the end result valutakrambod, which perhaps can be translated to -small currency shop.

    - -

    The library uses the tornado python library to handle HTTP and -websocket connections, and provide a asynchronous system for -connecting to and tracking several services. The code is available -from -github.

    - -

    There are two example clients of the library. One is very simple and -list every updated buy/sell price received from the various services. -This code is started by running bin/btc-rates and call the client code -in valutakrambod/client.py. The simple client look like this:

    - -

    -import functools
    -import tornado.ioloop
    -import valutakrambod
    -class SimpleClient(object):
    -    def __init__(self):
    -        self.services = []
    -        self.streams = []
    -        pass
    -    def newdata(self, service, pair, changed):
    -        print("%-15s %s-%s: %8.3f %8.3f" % (
    -            service.servicename(),
    -            pair[0],
    -            pair[1],
    -            service.rates[pair]['ask'],
    -            service.rates[pair]['bid'])
    -        )
    -    async def refresh(self, service):
    -        await service.fetchRates(service.wantedpairs)
    -    def run(self):
    -        self.ioloop = tornado.ioloop.IOLoop.current()
    -        self.services = valutakrambod.service.knownServices()
    -        for e in self.services:
    -            service = e()
    -            service.subscribe(self.newdata)
    -            stream = service.websocket()
    -            if stream:
    -                self.streams.append(stream)
    -            else:
    -                # Fetch information from non-streaming services immediately
    -                self.ioloop.call_later(len(self.services),
    -                                       functools.partial(self.refresh, service))
    -                # as well as regularly
    -                service.periodicUpdate(60)
    -        for stream in self.streams:
    -            stream.connect()
    -        try:
    -            self.ioloop.start()
    -        except KeyboardInterrupt:
    -            print("Interrupted by keyboard, closing all connections.")
    -            pass
    -        for stream in self.streams:
    -            stream.close()
    -

    - -

    The library client loops over all known "public" services, -initialises it, subscribes to any updates from the service, checks and -activates websocket streaming if the service provide it, and if no -streaming is supported, fetches information from the service and sets -up a periodic update every 60 seconds. The output from this client -can look like this:

    - -

    -Bl3p            BTC-EUR: 5687.110 5653.690
    -Bl3p            BTC-EUR: 5687.110 5653.690
    -Bl3p            BTC-EUR: 5687.110 5653.690
    -Hitbtc          BTC-USD: 6594.560 6593.690
    -Hitbtc          BTC-USD: 6594.560 6593.690
    -Bl3p            BTC-EUR: 5687.110 5653.690
    -Hitbtc          BTC-USD: 6594.570 6593.690
    -Bitstamp        EUR-USD:    1.159    1.154
    -Hitbtc          BTC-USD: 6594.570 6593.690
    -Hitbtc          BTC-USD: 6594.580 6593.690
    -Hitbtc          BTC-USD: 6594.580 6593.690
    -Hitbtc          BTC-USD: 6594.580 6593.690
    -Bl3p            BTC-EUR: 5687.110 5653.690
    -Paymium         BTC-EUR: 5680.000 5620.240
    -

    - -

    The exchange order book is tracked in addition to the best buy/sell -price, for those that need to know the details.

    - -

    The other example client is focusing on providing a curses view -with updated buy/sell prices as soon as they are received from the -services. This code is located in bin/btc-rates-curses and activated -by using the '-c' argument. Without the argument the "curses" output -is printed without using curses, which is useful for debugging. The -curses view look like this:

    - -

    -           Name Pair   Bid         Ask         Spr    Ftcd    Age
    - BitcoinsNorway BTCEUR   5591.8400   5711.0800   2.1%   16    nan     60
    -       Bitfinex BTCEUR   5671.0000   5671.2000   0.0%   16     22     59
    -        Bitmynt BTCEUR   5580.8000   5807.5200   3.9%   16     41     60
    -         Bitpay BTCEUR   5663.2700         nan   nan%   15    nan     60
    -       Bitstamp BTCEUR   5664.8400   5676.5300   0.2%    0      1      1
    -           Bl3p BTCEUR   5653.6900   5684.9400   0.5%    0    nan     19
    -       Coinbase BTCEUR   5600.8200   5714.9000   2.0%   15    nan    nan
    -         Kraken BTCEUR   5670.1000   5670.2000   0.0%   14     17     60
    -        Paymium BTCEUR   5620.0600   5680.0000   1.1%    1   7515    nan
    - BitcoinsNorway BTCNOK  52898.9700  54034.6100   2.1%   16    nan     60
    -        Bitmynt BTCNOK  52960.3200  54031.1900   2.0%   16     41     60
    -         Bitpay BTCNOK  53477.7833         nan   nan%   16    nan     60
    -       Coinbase BTCNOK  52990.3500  54063.0600   2.0%   15    nan    nan
    -        MiraiEx BTCNOK  52856.5300  54100.6000   2.3%   16    nan    nan
    - BitcoinsNorway BTCUSD   6495.5300   6631.5400   2.1%   16    nan     60
    -       Bitfinex BTCUSD   6590.6000   6590.7000   0.0%   16     23     57
    -         Bitpay BTCUSD   6564.1300         nan   nan%   15    nan     60
    -       Bitstamp BTCUSD   6561.1400   6565.6200   0.1%    0      2      1
    -       Coinbase BTCUSD   6504.0600   6635.9700   2.0%   14    nan    117
    -         Gemini BTCUSD   6567.1300   6573.0700   0.1%   16     89    nan
    -         Hitbtc+BTCUSD   6592.6200   6594.2100   0.0%    0      0      0
    -         Kraken BTCUSD   6565.2000   6570.9000   0.1%   15     17     58
    -  Exchangerates EURNOK      9.4665      9.4665   0.0%   16 107789    nan
    -     Norgesbank EURNOK      9.4665      9.4665   0.0%   16 107789    nan
    -       Bitstamp EURUSD      1.1537      1.1593   0.5%    4      5      1
    -  Exchangerates EURUSD      1.1576      1.1576   0.0%   16 107789    nan
    - BitcoinsNorway LTCEUR      1.0000     49.0000  98.0%   16    nan    nan
    - BitcoinsNorway LTCNOK    492.4800    503.7500   2.2%   16    nan     60
    - BitcoinsNorway LTCUSD      1.0221     49.0000  97.9%   15    nan    nan
    -     Norgesbank USDNOK      8.1777      8.1777   0.0%   16 107789    nan
    -

    - -

    The code for this client is too complex for a simple blog post, so -you will have to check out the git repository to figure out how it -work. What I can tell is how the three last numbers on each line -should be interpreted. The first is how many seconds ago information -was received from the service. The second is how long ago, according -to the service, the provided information was updated. The last is an -estimate on how often the buy/sell values change.

    - -

    If you find this library useful, or would like to improve it, I -would love to hear from you. Note that for some of the services I've -implemented a trading API. It might be the topic of a future blog -post.

    + +
    24th March 2019
    +

    Yesterday, a new release of +Nikita +Noark 5 core project was +announced +on the project mailing list. The free software solution is an +implementation of the Norwegian archive standard Noark 5 used by +government offices in Norway. These were the changes in version 0.3 +since version 0.2.1 (from NEWS.md):

    + +
      +
    • Improved ClassificationSystem and Class behaviour.
    • +
    • Tidied up known inconsistencies between domain model and hateaos links.
    • +
    • Added experimental code for blockchain integration.
    • +
    • Make token expiry time configurable at upstart from properties file.
    • +
    • Continued work on OData search syntax.
    • +
    • Started work on pagination for entities, partly implemented for Saksmappe.
    • +
    • Finalise ClassifiedCode Metadata entity.
    • +
    • Implement mechanism to check if authentication token is still + valid. This allow the GUI to return a more sensible message to the + user if the token is expired.
    • +
    • Reintroduce browse.html page to allow user to browse JSON API using + hateoas links.
    • +
    • Fix bug in handling file/mappe sequence number. Year change was + not properly handled.
    • +
    • Update application yml files to be in sync with current development.
    • +
    • Stop 'converting' everything to PDF using libreoffice. Only + convert the file formats doc, ppt, xls, docx, pptx, xlsx, odt, odp + and ods.
    • +
    • Continued code style fixing, making code more readable.
    • +
    • Minor bug fixes.
    • + +
    + +

    If free and open standardized archiving API sound interesting to +you, please contact us on IRC +(#nikita on +irc.freenode.net) or email +(nikita-noark +mailing list).

    As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -674,7 +640,7 @@ activities, please send Bitcoin donations to my address

    @@ -682,47 +648,183 @@ activities, please send Bitcoin donations to my address
    - -
    24th September 2018
    -

    Back in February, I got curious to see -if -VLC now supported Bittorrent streaming. It did not, despite the -fact that the idea and code to handle such streaming had been floating -around for years. I did however find -a standalone plugin -for VLC to do it, and half a year later I decided to wrap up the -plugin and get it into Debian. I uploaded it to NEW a few days ago, -and am very happy to report that it -entered -Debian a few hours ago, and should be available in Debian/Unstable -tomorrow, and Debian/Testing in a few days.

    - -

    With the vlc-plugin-bittorrent package installed you should be able -to stream videos using a simple call to

    - -

    -vlc https://archive.org/download/TheGoat/TheGoat_archive.torrent
    -

    - -

    It can handle magnet links too. Now if only native vlc had -bittorrent support. Then a lot more would be helping each other to -share public domain and creative commons movies. The plugin need some -stability work with seeking and picking the right file in a torrent -with many files, but is already usable. Please note that the plugin -is not removing downloaded files when vlc is stopped, so it can fill -up your disk if you are not careful. Have fun. :)

    - -

    I would love to get help maintaining this package. Get in touch if -you are interested.

    - -

    As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

    + +
    11th March 2019
    +

    Et virksomhetsarkiv for meg, er et arbeidsverktøy der en enkelt kan +finne informasjonen en trenger når en trenger det, og der +virksomhetens samlede kunnskap er tilgjengelig. Det må være greit å +finne frem i, litt som en bibliotek. Men der et bibliotek gjerne tar +vare på offentliggjort informasjon som er tilgjengelig flere steder, +tar et arkiv vare på virksomhetsintern og til tider personlig +informasjon som ofte kun er tilgjengelig fra et sted.

    + +

    Jeg mistenker den eneste måten å sikre at arkivet inneholder den +samlede kunnskapen i en virksomhet, er å bruke det som virksomhetens +kunnskapslager. Det innebærer å automatisk kopiere (brev, epost, +SMS-er etc) inn i arkivet når de sendes og mottas, og der filtrere +vekk det en ikke vil ta vare på, og legge på metadata om det som er +samlet inn for enkel gjenfinning. En slik bruk av arkivet innebærer at +arkivet er en del av daglig virke, ikke at det er siste hvilested for +informasjon ingen lenger har daglig bruk for. For å kunne være en del +av det daglige virket må arkivet enkelt kunne integreres med andre +systemer. I disse dager betyr det å tilby arkivet som en +nett-tjeneste til hele virksomheten, tilgjengelig for både mennesker +og datamaskiner. Det betyr i tur å både tilby nettsider og et +maskinlesbart grensesnitt.

    + +

    For noen år siden erkjente visjonære arkivarer fordelene med et +standardisert maskinlesbart grensesnitt til organisasjonens arkiv. De +gikk igang med å lage noe de kalte +Noark +5 Tjenestegrensesnitt. Gjort riktig, så åpner slike maskinlesbare +grensesnitt for samvirke på tvers av uavhengige programvaresystemer. +Gjort feil, vil det blokkere for samvirke og bidra til +leverandørinnlåsing. For å gjøre det riktig så må grensesnittet være +klart og entydig beskrevet i en spesifikasjon som gjør at +spesifikasjonen tolkes på samme måte uavhengig av hvem som leser den, +og uavhengig av hvem som tar den i bruk.

    + +

    For å oppnå klare og entydige beskrivelser i en spesifikasjon, som +trengs for å kunne få en fri og åpen standard (se +Digistan-definisjon), +så trengs det en åpen og gjennomsiktig inngangsport med lav terskel, +der de som forsøker å ta den i bruk enkelt kan få inn korreksjoner, +etterlyse klargjøringer og rapportere uklarheter i spesifikasjonen. +En trenger også automatiserte datasystemer som måler og sjekker at et +gitt grensesnitt fungerer i tråd med spesifikasjonen.

    + +

    For Noark 5 Tjenestegrensesnittet er det nå etablert en slik åpen +og gjennomsiktig inngangsport på prosjekttjenesten github. Denne +inngangsporten består først og fremst av en åpen portal som lar enhver +se hva som er gjort av endringer i spesifikasjonsteksten over tid, men +det hører også med et åpent "diskusjonsforum" der en kan +komme med endringsforslag og forespørsler om klargjøringer. Alle +registrerte brukere på github kan bidra med innspill til disse +henvendelsene.

    + +

    I samarbeide med Arkivverket har jeg fått opprettet et git-depot +med spesifikasjonsteksten for tjenestegrensesnittet, der det er lagt +inn historikk for endringer i teksten de siste årene, samt lagt inn +endringsforslag og forespørsler om klargjøring av teksten. Bakgrunnen +for at jeg bidro med dette er at jeg er involvert i +Nikita-prosjektet, +som lager en fri programvare-utgave av Noark 5 Tjenestegrensesnitt. +Det er først når en forsøker å lage noe i tråd med en spesifikasjon at +en oppdager hvor mange detaljer som må beskrives i spesifikasjonen for +å sikre samhandling.

    + +

    Spesifikasjonen vedlikeholdes i et rent tekstformat, for å ha et +format egnet for versjonskontroll via versjontrollsystemet git. Dette +gjør det både enkelt å se konkret hvilke endringer som er gjort når, +samt gjør det praktisk mulig for enhver med github-konto å sende inn +endringsforslag med formuleringer til spesifikasjonsteksten. Dette +tekstformatet vises frem som nettsider på github, slik at en ikke +trenger spesielle verktøy for å se på siste utgave av +spesifikasjonen.

    + +

    Fra dette rene tekstformatet kan det så avledes ulike formater, som +HTML for websider, PDF for utskrift på papir og ePub for lesing med +ebokleser. Avlednings-systemet (byggesystemet) bruker i dag +verktøyene pandoc, latex, docbook-xsl og GNU make til +transformasjonen. Tekstformatet som brukes dag er +Markdown, men det vurderes +å +endre +til formatet RST i fremtiden for bedre styring av utseende på +PDF-utgaven.

    + +

    Versjonskontrollsystemet git ble valgt da det er både fleksibelt, +avansert og enkelt å ta i bruk. Github ble valgt (foran f.eks. Gitlab +som vi bruker i Nikita), da Arkivverket allerede hadde tatt i bruk +Github i andre sammenhenger.

    + +

    Enkle endringer i teksten kan gjøres av priviligerte brukere +direkte i nettsidene til Github, ved å finne aktuell fil som skal +endres (f.eks. kapitler/03-konformitet.md), klikke på den lille +bokstaven i høyre hjørne over teksten. Det kommer opp en nettside der +en kan endre teksten slik en ønsker. Når en er fornøyd med endringen +så må endringen "sjekkes inn" i historikken. Det gjøres ved +å gi en kort beskrivelse av endringen (beskriv helst hvorfor endringen +trengs, ikke hva som er endret), under overskriften "Commit +changes". En kan og bør legge inn en lengre forklaring i det +større skrivefeltet, før en velger om endringen skal sendes direkte +til 'master'-grenen (dvs. autorativ utgave av spesifikasjonen) eller +om en skal lage en ny gren for denne endringen og opprette en +endringsforespørsel (aka "Pull Request"/PR). Når alt dette +er gjort kan en velge "Commit changes" for å sende inn +endringen. Hvis den er lagt inn i "master"-grenen så er den +en offisiell del av spesifikasjonen med en gang. Hvis den derimot er +en endringsforespørsel, så legges den inn i +listen +over forslag til endringer som venter på korrekturlesing og +godkjenning.

    + +

    Større endringer (for eksempel samtidig endringer i flere filer) +gjøres enklest ved å hente ned en kopi av git-depoet lokalt og gjøre +endringene der før endringsforslaget sendes inn. Denne prosessen er +godt beskrivet i dokumentasjon fra github. Git-prosjektet som skal +"klones" er +https://github.com/arkivverket/noark5-tjenestegrensesnitt-standard/.

    + +

    For å registrere nye utfordringer (issues) eller kommentere på +eksisterende utfordringer benyttes nettsiden +https://github.com/arkivverket/noark5-tjenestegrensesnitt-standard/issues. +I skrivende stund er det 48 åpne og 11 avsluttede utfordringer. Et +forslag til hva som bør være med når en beskriver en utfordring er +tilgjengelig som utfordring +#14.

    + +

    For å bygge en PDF-utgave av spesifikasjonen så bruker jeg i dag en +Debian GNU/Linux-maskin med en rekke programpakker installert. Når +dette er på plass, så holder det å kjøre kommandoen 'make pdf html' på +kommandolinjen, vente ca. 20 sekunder, før spesifikasjon.pdf og +spesifikasjon.html ligger klar på disken. Verktøyene for bygging av +PDF, HTML og ePub-utgave er også tilgjengelig på Windows og +MacOSX.

    + +

    Github bidrar med rammeverket. Men for at åpent vedlikehold av +spesifikasjonen skal fungere, så trengs det folk som bidrar med sin +tid og kunnskap. Arkivverket har sagt de skal bidra med innspill og +godkjenne forslag til endringer, men det blir størst suksess hvis alle +som bruker og lager systemer basert på Noark 5 Tjenestegrensesnitt +bidrar med sin kunnskap og kommer med forslag til forebedringer. Jeg +stiller. Blir du med?

    + +

    Det er viktig å legge til rette for åpen diskusjon blant alle +interesserte, som ikke krever at en må godta lange kontrakter med +vilkår for deltagelse. Inntil Arkivverket dukker opp på IRC har vi +laget en IRC-kanal der interesserte enkelt kan orientere seg og +diskutere tjenestegrensesnittet. Alle er velkommen til å ta turen +innom +#nikita +(f.eks. via irc.freenode.net) for å møte likesinnede.

    + +

    Det holder dog ikke å ha en god spesifikasjon, hvis ikke de som tar +den i bruk gjør en like god jobb. For å automatisk teste om et konkret +tjenestegrensesnitt følger (min) forståelse av +spesifikasjonsdokumentet, har jeg skrevet et program som kobler seg +opp til et Noark 5v4 REST-tjeneste og tester alt den finner for å se +om det er i henhold til min tolkning av spesifikasjonen. Dette +verktøyet er tilgjengelig fra +https://github.com/petterreinholdtsen/noark5-tester, +og brukes daglig mens vi utvikler Nikita for å sikre at vi ikke +introduserer nye feil. Hvis en skal sikre samvirke på tvers av ulike +systemer er det helt essensielt å kunne raskt og automatisk sjekke at +tjenestegrensesnittet oppfører seg som forventet. Jeg håper andre som +lager sin utgave av tjenestegrensesnittet vi bruke dette verktøyet, +slik at vi tidlig og raskt kan oppdage hvor vi har tolket +spesifikasjonen ulikt, og dermed få et godt grunnlag for å gjøre +spesifikasjonsteksten enda klarere og bedre.

    + +

    Dagens beskrivelse av Noark 5 Tjenestegrensesnitt er et svært godt +utgangspunkt for å gjøre virksomhetens arkiv til et dynamisk og +sentralt arbeidsverktøy i organisasjonen. Blir du med å gjøre den +enda bedre?

    @@ -730,35 +832,50 @@ activities, please send Bitcoin donations to my address
    - -
    2nd September 2018
    -

    I continue to explore my Kodi installation, and today I wanted to -tell it to play a youtube URL I received in a chat, without having to -insert search terms using the on-screen keyboard. After searching the -web for API access to the Youtube plugin and testing a bit, I managed -to find a recipe that worked. If you got a kodi instance with its API -available from http://kodihost/jsonrpc, you can try the following to -have check out a nice cover band.

    - -

    curl --silent --header 'Content-Type: application/json' \
    -  --data-binary '{ "id": 1, "jsonrpc": "2.0", "method": "Player.Open",
    -  "params": {"item": { "file":
    -  "plugin://plugin.video.youtube/play/?video_id=LuRGVM9O0qg" } } }' \
    -  http://projector.local/jsonrpc

    - -

    I've extended kodi-stream program to take a video source as its -first argument. It can now handle direct video links, youtube links -and 'desktop' to stream my desktop to Kodi. It is almost like a -Chromecast. :)

    - -

    As usual, if you use Bitcoin and want to show your support of my -activities, please send Bitcoin donations to my address -15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b.

    + +
    13th February 2019
    +

    For +syv år siden oppdaget jeg at billettautomater for +kollektivtrafikken i Oslo kjørte +Windows 2000 +Professional. Operativsystemet har ikke fått sikkerhetsfikser fra +Microsoft siden 2010-07-13 i følge dem selv. Den samme versjonen av +operativsystemet var i bruk +for +to og et halvt år siden, og jammen er det ikke også i bruk den dag +i dag:

    + +

    [Bilde av Ruters billettautomat med Windows 2000-feilmelding]

    + +

    Bildet er tatt i dag av Kirill Miazine og tilgjengelig for bruk med +bruksvilkårene til +Creative +Commons Attribution 4.0 International (CC BY 4.0).

    + +

    Kanskje det hadde vært +bedre +med gratis kollektivtrafikk, slik at vi slapp å stole på +datakompetansen til Ruter for å verne våre privatliv samt holde +personopplysninger og betalingsinformasjon unna uvedkommende. Eneste +måten å sikre at hvor en befinner seg ikke kan hentes ut fra Ruters +systemer er å betale enkeltbilletter med kontanter. Jeg vet at Ruter +har en god historie om hvor personvernvennlige mobil-app og +RFID-kortene er, men den historien er ikke mulig å uavhengig +kontrollere uten priviligert tilgang til interne system og blir dermed +bare nok en god historie basert på tillit til de som forteller +historien. Det er ikke slik en sikrer privatsfæren. Det gjør en ved +å sikre at det ikke (kan) registreres informasjon om ens person.

    + +

    Som vanlig, hvis du bruker Bitcoin og ønsker å vise din støtte til +det jeg driver med, setter jeg pris på om du sender Bitcoin-donasjoner +til min adresse +15oWEoG9dUPovwmUL9KWAnYRtNJEkP1u1b. +Merk, betaling med bitcoin er ikke anonymt. :)

    - Tags: debian, english, kodi, video. + Tags: betalkontant, norsk, ruter.
    @@ -773,6 +890,21 @@ activities, please send Bitcoin donations to my address

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