Der Blog von Benny Neugebauer » Webanwendungen

svn: Could not open the requested SVN filesystem

bennyn — Wed, 14 Mar 2012 21:01:31 +0000

Die Fehlermeldung “svn: Could not open the requested SVN filesystem” tritt auf, wenn versucht wird ein SVN-Kommando auf eine URL oder einen Pfad auszuführen, auf den SVN keinen Zugriff hat -oder der schlichtweg einfach falsch ist. Mir ist der Fehler begegnet, als ich versucht habe mit svn -v log http://localhost/svn/my_repository -r 40 auf ein Repository zuzugreifen, das überhaupt nicht existiert hat (die URL war falsch).

Ob ein Repository gültig ist, kann mit folgendem Befehl geprüft werden (funktioniert nur mit Dateisystem-Pfaden):

svnadmin verify C:/apache/svn/my_repository

SVN post-commit hook for Windows and Linux

bennyn — Sun, 11 Mar 2012 16:25:30 +0000

For demonstration purposes I have rewritten a post-commit hook (which was originally developed for Linux) for Windows.

post-commit (Linux version)

#!/bin/sh
# POST-COMMIT HOOK
# The post-commit hook is invoked after a commit.
#
#   [1] REPOS-PATH   (the path to this repository)
#   [2] REV          (the number of the revision just committed)
#
REPOS="$1"
REV="$2"
 
echo $REPOS $REV >> /tmp/test.txt

post-commit.bat (Windows version)

@echo off
:: POST-COMMIT HOOK
:: The post-commit hook is invoked after a commit.
::
::  [1] REPOS-PATH   (the path to this repository)
::  [2] REV          (the number of the revision just committed)
::
@echo off  
 
set REPOS=%1
set REV=%2   
 
echo %REPOS% %REV% > C:/Temp/test.txt

How to install node.js on a Debian server

bennyn — Tue, 28 Feb 2012 22:14:48 +0000

How to install node.js (latest version)

apt-get install g++ curl libssl-dev apache2-utils git-core -y
cd /etc
git clone git://github.com/joyent/node
cd /etc/node
./configure
make
sudo make install

How to install node.js (stable version)

apt-get install g++ curl libssl-dev apache2-utils git-core -y
cd /tmp
wget http://nodejs.org/dist/v0.6.11/node-v0.6.11.tar.gz
tar xvf node-v0.6.11.tar.gz
mv /tmp/node-v0.6.11 /etc
cd /etc/node-v0.6.11
./configure
make
sudo make install
rm /tmp/node-v0.6.11.tar.gz

You can check the installed version with node --version.

node.js package manager

If you want to use a package manager for node.js (like npm), then you can get it with:

curl http://npmjs.org/install.sh | sh

To use the package manager, just go into your node.js webproject and execute something like:

npm install websocket.io

This command will load the desired dependencies (like websocket.io) into a directory called “node_modules” within your project’s folder.

Uninstalling node.js

To uninstall node.js, just go to the folder where you installed node.js (e.g. /tmp/node-v0.6.11) and use the following command:

make uninstall

How to install Java 7 on Debian

bennyn — Fri, 13 Jan 2012 21:13:23 +0000

Here is a tutorial on how to install the latest Java 7 JDK and JRE on a Debian Linux system:

apt-get update && apt-get upgrade -y
sudo apt-get install sun-java6-jdk -y
mkdir /tmp/downloads && cd /tmp/downloads 
wget http://download.oracle.com/otn-pub/java/jdk/7u2-b13/jdk-7u2-linux-i586.tar.gz
tar -xvf jdk-7u2-linux-i586.tar.gz
mv /tmp/downloads/jdk1.7.0_02 /usr/lib/jvm
mv /usr/lib/jvm/jdk1.7.0_02 /usr/lib/jvm/java-7-oracle
sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/java-7-oracle/bin/java" 1
sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/java-7-oracle/bin/javac" 1
sudo update-alternatives --install "/usr/bin/javaws" "javaws" "/usr/lib/jvm/java-7-oracle/bin/javaws" 1
sudo update-alternatives --config java
java -version
rm -r /tmp/downloads

Tetris Battle – We are having difficulties logging into Facebook. Please try again later.

bennyn — Fri, 23 Dec 2011 00:04:40 +0000

If you have any problems with the Facebook game Tetris Battle, then you should see if third-party cookies are enabled in your browser. Often they are not. Therefore, the error message “We are having difficulties logging into Facebook. Please try again later.” appears in many browsers.

To fix this problem, you can do the following:

For Mozilla Firefox: Enabling third-party cookies until they expire
For Google Chrome: Allow cookies by default

Thanks to the Tetris Battle Online Customer Support for this information!