X-Git-Url: http://pere.pagekite.me/gitweb/homepage.git/blobdiff_plain/aaf3a8d6ac3f87b3060fda22f11cb474d2e37af0..857ad50edc09c29171350b5ee1338bbf23352db6:/blog/index.html diff --git a/blog/index.html b/blog/index.html index 940ce3ba7d..54c4524a14 100644 --- a/blog/index.html +++ b/blog/index.html @@ -20,58 +20,67 @@
-
Web browser integration of VLC with Bittorrent support
-
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 og 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 then 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 @@ -80,7 +89,7 @@ activities, please send Bitcoin donations to my address

- Tags: english, verkidetfri, video. + Tags: english, robot.
@@ -88,64 +97,57 @@ 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 @@ -161,7 +163,7 @@ activities, please send Bitcoin donations to my address

    @@ -169,102 +171,50 @@ 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 @@ -273,7 +223,7 @@ activities, please send Bitcoin donations to my address

    - Tags: english, sikkerhet. + Tags: english, kart, noark5, standard.
    @@ -281,59 +231,146 @@ 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:

    + +
    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:

    -

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

    +
    +@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
    +
    -

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

    +

    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:

    -

    -#!/bin/sh
    -set -e
    -cd ~/
    -cleanup() {
    -    if [ "$syncpid" ] ; then
    -        kill $syncpid
    -    fi
    +
    +@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:%"
    -

    +@enduml + -

    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.

    +

    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 @@ -342,7 +379,7 @@ activities, please send Bitcoin donations to my address

    @@ -350,152 +387,47 @@ 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
    -

    + +
    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):

    -

    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.

    +
      +
    • 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 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.

    +

    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 @@ -504,7 +436,7 @@ activities, please send Bitcoin donations to my address

    @@ -512,47 +444,183 @@ 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?

    @@ -560,35 +628,50 @@ 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.
    @@ -596,19 +679,49 @@ activities, please send Bitcoin donations to my address
    - -
    30th August 2018
    -

    It might seem obvious that software created using tax money should -be available for everyone to use and improve. Free Software -Foundation Europe recentlystarted a campaign to help get more people -to understand this, and I just signed the petition on -Public Money, Public Code to help -them. I hope you too will do the same.

    + +
    7th February 2019
    +

    Jeg registrerer med glede at Stortinget i dag har +vedtatt +at det skal vedlikeholdes et åpent og maskinlesbart register over +reelle rettighetshavere i Norge. Her kan en kanskje få et +register som kan brukes til å analysere eierskap og kontroll i Norge +maskinelt og knytte det til internasjonale databaser som +OpenCorporates. Det liker +jeg.

    + +

    Den vedtatte grense på 25 prosents eierandel fikk stor +oppmerksomhet i debatten. Jeg ser fra enkel analyse av skatteetatens +eierskapsregister at 80.4% av alle selskapseiere i registeret har +mindre enn 25% eierandel, mot 73.8% som har mindre enn 5% eierandel. +En grense på 25% vil altså utelukke 80.4% av selskapseierne fra det +vedtatte registeret, og en grense på 5% vil skjule 73.8%. En må helt +ned i registrering av eierandeler over circa 0.002% for å få mer enn +halvparten av selskapseierne i Norge. Mon tro hvor langt ned en må i +eierprosent for å få med alle eierskapene til politisk valgte +representanter?

    + +

    Jeg biter meg også merke i at Sivert Bjørnstad fra FrP +tilsynelatende tror at aksjonærregisteret er et eksisterende åpent +register, på tross av at det så vidt jeg vet kun deles ved personlig +oppmøte hos skatteetaten og ikke er tilgjengelig i maskinlesbart +format for enhver, og dermed så langt ikke er importert inn i +OpenCorporates. Det anser jeg ikke for et spesielt åpent register. +Debatten ga ellers lite håp om at situasjonen bedrer seg, da +finansministeren bare henviste til en fraværende næringsministeren og +ikke ville uttale seg om et skikkelig aksjonærregister snart dukker +opp.

    + +

    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. :)

    @@ -616,62 +729,62 @@ them. I hope you too will do the same.

    - -
    13th August 2018
    -

    A few days ago, I wondered if there are any privacy respecting -health monitors and/or fitness trackers available for sale these days. -I would like to buy one, but do not want to share my personal data -with strangers, nor be forced to have a mobile phone to get data out -of the unit. I've received some ideas, and would like to share them -with you. - -One interesting data point was a pointer to a Free Software app for -Android named -Gadgetbridge. -It provide cloudless collection and storing of data from a variety of -trackers. Its -list -of supported devices is a good indicator for units where the -protocol is fairly open, as it is obviously being handled by Free -Software. Other units are reportedly encrypting the collected -information with their own public key, making sure only the vendor -cloud service is able to extract data from the unit. The people -contacting me about Gadgetbirde said they were using -Amazfit -Bip and -Xiaomi -Band 3.

    - -

    I also got a suggestion to look at some of the units from Garmin. -I was told their GPS watches can be connected via USB and show up as a -USB storage device with -Garmin -FIT files containing the collected measurements. While -proprietary, FIT files apparently can be read at least by -GPSBabel and the -GpxPod Nextcloud -app. It is unclear to me if they can read step count and heart rate -data. The person I talked to was using a -Garmin Forerunner -935, which is a fairly expensive unit. I doubt it is worth it for -a unit where the vendor clearly is trying its best to move from open -to closed systems. I still remember when Garmin dropped NMEA support -in its GPSes.

    - -

    A final idea was to build ones own unit, perhaps by basing it on a -wearable hardware platforms like -the Flora Geo -Watch. Sound like fun, but I had more money than time to spend on -the topic, so I suspect it will have to wait for another time.

    - -

    While I was working on tracking down links, I came across an -inspiring TED talk by Dave Debronkart about -being a -e-patient, and discovered the web site -Participatory -Medicine. If you too want to track your own health and fitness -without having information about your private life floating around on -computers owned by others, I recommend checking it out.

    + +
    1st February 2019
    +

    Yesterday, the Kraken virtual currency exchange announced +their +Websocket service, providing a stream of exchange updates to its +clients. Getting updated rates quickly is a good idea, so I used +their API +documentation and added Websocket support to the Kraken service in +Valutakrambod today. The python library can now get updates +from Kraken several times per second, instead of every time the +information is polled from the REST API.

    + +

    If this sound interesting to you, the code for valutakrambod is +available from +github. +Here is example output from the example client displaying rates in a +curses view:

    + +

    +           Name Pair   Bid         Ask         Spr    Ftcd    Age
    + BitcoinsNorway BTCEUR   2959.2800   3021.0500   2.0%   36    nan    nan
    +       Bitfinex BTCEUR   3087.9000   3088.0000   0.0%   36     37    nan
    +        Bitmynt BTCEUR   3001.8700   3135.4600   4.3%   36     52    nan
    +         Bitpay BTCEUR   3003.8659         nan   nan%   35    nan    nan
    +       Bitstamp BTCEUR   3008.0000   3010.2300   0.1%    0      1      1
    +           Bl3p BTCEUR   3000.6700   3010.9300   0.3%    1    nan    nan
    +       Coinbase BTCEUR   2992.1800   3023.2500   1.0%   34    nan    nan
    +         Kraken+BTCEUR   3005.7000   3006.6000   0.0%    0      1      0
    +        Paymium BTCEUR   2940.0100   2993.4400   1.8%    0   2688    nan
    + BitcoinsNorway BTCNOK  29000.0000  29360.7400   1.2%   36    nan    nan
    +        Bitmynt BTCNOK  29115.6400  29720.7500   2.0%   36     52    nan
    +         Bitpay BTCNOK  29029.2512         nan   nan%   36    nan    nan
    +       Coinbase BTCNOK  28927.6000  29218.5900   1.0%   35    nan    nan
    +        MiraiEx BTCNOK  29097.7000  29741.4200   2.2%   36    nan    nan
    + BitcoinsNorway BTCUSD   3385.4200   3456.0900   2.0%   36    nan    nan
    +       Bitfinex BTCUSD   3538.5000   3538.6000   0.0%   36     45    nan
    +         Bitpay BTCUSD   3443.4600         nan   nan%   34    nan    nan
    +       Bitstamp BTCUSD   3443.0100   3445.0500   0.1%    0      2      1
    +       Coinbase BTCUSD   3428.1600   3462.6300   1.0%   33    nan    nan
    +         Gemini BTCUSD   3445.8800   3445.8900   0.0%   36    326    nan
    +         Hitbtc BTCUSD   3473.4700   3473.0700  -0.0%    0      0      0
    +         Kraken+BTCUSD   3444.4000   3445.6000   0.0%    0      1      0
    +  Exchangerates EURNOK      9.6685      9.6685   0.0%   36  22226    nan
    +     Norgesbank EURNOK      9.6685      9.6685   0.0%   36  22226    nan
    +       Bitstamp EURUSD      1.1440      1.1462   0.2%    0      1      2
    +  Exchangerates EURUSD      1.1471      1.1471   0.0%   36  22226    nan
    + BitcoinsNorway LTCEUR      1.0009     22.6538  95.6%   35    nan    nan
    + BitcoinsNorway LTCNOK    259.0900    264.9300   2.2%   35    nan    nan
    + BitcoinsNorway LTCUSD      0.0000     29.0000 100.0%   35    nan    nan
    +     Norgesbank USDNOK      8.4286      8.4286   0.0%   36  22226    nan
    +

    + +

    Yes, I notice the strange negative spread on Hitbtc. I've seen the +same on Kraken. Another strange observation is that Kraken some times +announce trade orders a fraction of a second in the future. I really +wonder what is going on there.

    As usual, if you use Bitcoin and want to show your support of my activities, please send Bitcoin donations to my address @@ -680,7 +793,7 @@ activities, please send Bitcoin donations to my address

    - Tags: english. + Tags: bitcoin, english.
    @@ -688,36 +801,34 @@ activities, please send Bitcoin donations to my address
    - -
    7th August 2018
    -

    Dear lazyweb,

    - -

    I wonder, is there a fitness tracker / health monitor available for -sale today that respect the users privacy? With this I mean a -watch/bracelet capable of measuring pulse rate and other -fitness/health related values (and by all means, also the correct time -and location if possible), which is only provided for -me to extract/read from the unit with computer without a radio beacon -and Internet connection. In other words, it do not depend on a cell -phone app, and do make the measurements available via other peoples -computer (aka "the cloud"). The collected data should be available -using only free software. I'm not interested in depending on some -non-free software that will leave me high and dry some time in the -future. I've been unable to find any such unit. I would like to buy -it. The ones I have seen for sale here in Norway are proud to report -that they share my health data with strangers (aka "cloud enabled"). -Is there an alternative? I'm not interested in giving money to people -requiring me to accept "privacy terms" to allow myself to measure my -own health.

    - -

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

    + +
    23rd January 2019
    +

    I høst ble jeg inspirert til å bidra til oversettelsen av +strategispillet Unknown +Horizons, og oversatte de nesten 200 strengene i prosjektet til +bokmål. Deretter har jeg gått å ventet på at det kom en ny utgave som +inneholdt disse oversettelsene. Nå er endelig ventetiden over. Den +nye versjonen kom på nyåret, og ble +lastet opp i +Debian for noen få dager siden. I går kveld fikk jeg testet det ut, og +må innrømme at oversettelsene fungerer fint. Fant noen få tekster som +måtte justeres, men ikke noe alvorlig. Har oppdatert +oversettelsen på +Weblate, slik at neste utgave vil være enda bedre. :)

    + +

    Spillet er et ressursstyringsspill ala Civilization, og er morsomt +Ã¥ spille for oss som liker slikt. :)

    + +

    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: english. + Tags: debian, norsk.
    @@ -732,6 +843,21 @@ activities, please send Bitcoin donations to my address

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