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• apt-get fails to upgrade, install, remove etc

  - by Kieran Peat

  I upgraded from 11.10 to 12.04, had no issues that I noticed. Recently tried to install something via software center, but it was throwing errors. Changed to trying to sudo apt-get install instead but again no luck. I've genuinely tried as much as I know to fix this, but I can't so I figured I'd ask here. I've done sudo apt-get update successfully but sudo apt-get upgrade failed with... You might want to run ‘apt-get -f install’ to correct these. The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not installed libssl1.0.0 : Breaks: libssl1.0.0:i386 (!= 1.0.1-4ubuntu5.2) but 1.0.0e-2ubuntu4.6 is installed libssl1.0.0:i386 : Breaks: libssl1.0.0 (!= 1.0.0e-2ubuntu4.6) but 1.0.1-4ubuntu5.2 is installed E: Unmet dependencies. Try using -f. Using sudo apt-get -f install... The following packages were automatically installed and are no longer required: libgtkmm-2.4-1c2a libgtkhtml3.14-19 libglade2-0 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: libqtcore4:i386 libssl1.0.0:i386 The following NEW packages will be installed libqtcore4:i386 The following packages will be upgraded: libssl1.0.0:i386 1 upgraded, 1 newly installed, 0 to remove and 33 not upgraded. 20 not fully installed or removed. Need to get 0 B/3,063 kB of archives. After this operation, 9,044 kB of additional disk space will be used. Do you want to continue [Y/n]? y E: Internal Error, No file name for libssl1.0.0 I've tried sudo apt-get remove libssl1.0.0 and sudo apt-get remove libssl1.0.0:i386 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed Depends: libssl1.0.0:i386 but it is not going to be installed libcurl3:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libsasl2-modules:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). I've also tried sudo apt-get dist-upgrade, sudo apt-get autoremove etc without any luck. I also tried to download the .deb and use dpkg -i, but that failed and did not fully understand the method to be honest. Edit This is in response to the comments ref: sudo apt-get install -f doesn't fix broken packages. And now? sudo dpkg --configure -a --force-all dpkg: error processing libssl1.0.0 (--configure): libssl1.0.0:amd64 1.0.1-4ubuntu5.2 cannot be configured because libssl1.0.0:i386 is in a different version (1.0.0e-2ubuntu4.6) dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: also configuring `libssl1.0.0:i386' (required by `ia32-libs-multiarch:i386') dpkg: error processing libssl1.0.0:i386 (--configure): libssl1.0.0:i386 1.0.0e-2ubuntu4.6 cannot be configured because libssl1.0.0:amd64 is in a different version (1.0.1-4ubuntu5.2) dpkg: too many errors, stopping Errors were encountered while processing: libssl1.0.0 libssl1.0.0:i386 ... libssl1.0.0:i386 Processing was halted because there were too many errors. Ref: Package manager doesn't work anymore moving /var/lib/kpkg/info/libssl.. kieran@kieran-EX58-UD3R:~$ sudo mv /var/lib/dpkg/info/libssl1.0.0:i386.postinst /var/lib/dpkg/info/libssl1.0.0:i386.postinst.bad kieran@kieran-EX58-UD3R:~$ sudo mv /var/lib/dpkg/info/libssl1.0.0:amd64.postinst /var/lib/dpkg/info/libssl1.0.0:amd64.postinst.bad kieran@kieran-EX58-UD3R:~$ sudo apt-get --reinstall install libssl Reading package lists... Done Building dependency tree Reading state information... Done Package libssl is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package 'libssl' has no installation candidate kieran@kieran-EX58-UD3R:~$ sudo apt-get --reinstall install libssl1.0.0 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libssl1.0.0 : Breaks: libssl1.0.0:i386 (!= 1.0.1-4ubuntu5.2) but 1.0.0e-2ubuntu4.6 is to be installed libssl1.0.0:i386 : Breaks: libssl1.0.0 (!= 1.0.0e-2ubuntu4.6) but 1.0.1-4ubuntu5.2 is to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution). kieran@kieran-EX58-UD3R:~$ sudo apt-get -f install Reading package lists... Done Building dependency tree Reading state information... Done Correcting dependencies... Done The following packages were automatically installed and are no longer required: libgtkmm-2.4-1c2a libgtkhtml3.14-19 libglade2-0 Use 'apt-get autoremove' to remove them. The following extra packages will be installed: libqtcore4:i386 libssl1.0.0:i386 The following NEW packages will be installed libqtcore4:i386 The following packages will be upgraded: libssl1.0.0:i386 1 upgraded, 1 newly installed, 0 to remove and 58 not upgraded. 20 not fully installed or removed. Need to get 3,063 kB of archives. After this operation, 9,044 kB of additional disk space will be used. Do you want to continue [Y/n]? y Get:1 http://gb.archive.ubuntu.com/ubuntu/ precise-updates/main libssl1.0.0 i386 1.0.1-4ubuntu5.2 [1,002 kB] Get:2 http://gb.archive.ubuntu.com/ubuntu/ precise-updates/main libqtcore4 i386 4:4.8.1-0ubuntu4.1 [2,061 kB] Fetched 3,063 kB in 4s (731 kB/s) E: Internal Error, No file name for libssl1.0.0 ref: libssl Dependencies removing libssl1.0.0:i386 kieran@kieran-EX58-UD3R:~$ sudo apt-get remove libssl1.0.0:i386 Reading package lists... Done Building dependency tree Reading state information... Done You might want to run 'apt-get -f install' to correct these: The following packages have unmet dependencies. ia32-libs-multiarch:i386 : Depends: libqtcore4:i386 but it is not going to be installed Depends: libssl1.0.0:i386 but it is not going to be installed libcurl3:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed libqt4-dbus:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-declarative:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-designer:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-network:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-opengl:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-qt3support:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-script:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-scripttools:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-sql-mysql:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-svg:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-test:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xml:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqt4-xmlpatterns:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtgui4:i386 : Depends: libqtcore4:i386 (= 4:4.8.1-0ubuntu4.1) but it is not going to be installed libqtwebkit4:i386 : Depends: libqtcore4:i386 (>= 4:4.8.0~) but it is not going to be installed libsasl2-modules:i386 : Depends: libssl1.0.0:i386 (>= 1.0.0) but it is not going to be installed E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).

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• Week 21: FY10 in the Rear View Mirror

  - by sandra.haan

  FY10 is coming to a close and before we dive into FY11 we thought we would take a walk down memory lane and reminisce on some of our favorite Oracle PartnerNetwork activities. June 2009 brought One Red Network to partners offering access to the same virtual kickoff environment used by Oracle employees. It was a new way to deliver valuable content to key stakeholders (and without the 100+ degree temperatures). Speaking of hot, Oracle also announced in June new licensing options for our ISV partners. This model enables an even broader community of ISVs to build, deploy and manage SaaS applications on the same platform. While some people took the summer off, the OPN Program team was working away to deliver a brand new partner program - Oracle PartnerNetwork Specialized - at Oracle OpenWorld in October. Specialized. Recognized. Preferred. If you haven't gotten the message yet, we may need an emergency crew to pull you out from that rock you've been hiding under. But seriously, the announcement at the OPN Forum drew a big crowd and our FY11 event is shaping up to be just as exciting. OPN Specialized was announced in October and opened our doors for enrollment in December 2009. To mark our grand opening we held our first ever social webcast allowing partners from around the world to interact with us live throughout the day. We had a lot of great conversations and really enjoyed the chance to speak with so many of you. After a short holiday break we were back at it - just a small announcement - Oracle's acquisition of Sun. In case you missed it, here is a short field report from Ted Bereswill, SVP North America Alliances & Channels on the partner events to support the announcement: And while we're announcing things - did we mention that both Ted Bereswill and Judson Althoff were named Channel Chiefs by CRN? Not only do we have a couple of Channel Chiefs, but Oracle also won the Partner Program 5 Star Programs Award and took top honors at the CRN Channel Champion Awards for Financial Factors/Financial Performance in the category of Data and Information Management and the and Xchange Solution Provider event in March 2010. We actually caught up with Judson at this event for a quick recap of our participation: But awards aside, let's not forget our main focus in FY10 and that is Specialization. In April we announced that we had over 35 Specializations available for partners and a plan to deliver even more in FY11. We are just days away from the end of FY10 but hope you enjoyed our walk down memory lane. We are already planning lots of activity for our partners in FY11 starting with our Partner Kickoff event on June 29th. Join us to hear the vision and strategy for FY11 and interact with regional A&C leaders. We look forward to talking with you then. The OPN Communications Team

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• Change Tracking

  - by Ricardo Peres

  You may recall my last post on Change Data Control. This time I am going to talk about other option for tracking changes to tables on SQL Server: Change Tracking. The main differences between the two are: Change Tracking works with SQL Server 2008 Express Change Tracking does not require SQL Server Agent to be running Change Tracking does not keep the old values in case of an UPDATE or DELETE Change Data Capture uses an asynchronous process, so there is no overhead on each operation Change Data Capture requires more storage and processing Here's some code that illustrates it's usage: -- for demonstrative purposes, table Post of database Blog only contains two columns, PostId and Title -- enable change tracking for database Blog, for 2 days ALTER DATABASE Blog SET CHANGE_TRACKING = ON (CHANGE_RETENTION = 2 DAYS, AUTO_CLEANUP = ON); -- enable change tracking for table Post ALTER TABLE Post ENABLE CHANGE_TRACKING WITH (TRACK_COLUMNS_UPDATED = ON); -- see current records on table Post SELECT * FROM Post SELECT * FROM sys.sysobjects WHERE name = 'Post' SELECT * FROM sys.sysdatabases WHERE name = 'Blog' -- confirm that table Post and database Blog are being change tracked SELECT * FROM sys.change_tracking_tables SELECT * FROM sys.change_tracking_databases -- see current version for table Post SELECT p.PostId, p.Title, c.SYS_CHANGE_VERSION, c.SYS_CHANGE_CONTEXT FROM Post AS p CROSS APPLY CHANGETABLE(VERSION Post, (PostId), (p.PostId)) AS c; -- update post UPDATE Post SET Title = 'First Post Title Changed' WHERE Title = 'First Post Title'; -- see current version for table Post SELECT p.PostId, p.Title, c.SYS_CHANGE_VERSION, c.SYS_CHANGE_CONTEXT FROM Post AS p CROSS APPLY CHANGETABLE(VERSION Post, (PostId), (p.PostId)) AS c; -- see changes since version 0 (initial) SELECT p.Title, c.PostId, SYS_CHANGE_VERSION, SYS_CHANGE_OPERATION, SYS_CHANGE_COLUMNS, SYS_CHANGE_CONTEXT FROM CHANGETABLE(CHANGES Post, 0) AS c LEFT OUTER JOIN Post AS p ON p.PostId = c.PostId; -- is column Title of table Post changed since version 0? SELECT CHANGE_TRACKING_IS_COLUMN_IN_MASK(COLUMNPROPERTY(OBJECT_ID('Post'), 'Title', 'ColumnId'), (SELECT SYS_CHANGE_COLUMNS FROM CHANGETABLE(CHANGES Post, 0) AS c)) -- get current version SELECT CHANGE_TRACKING_CURRENT_VERSION() -- disable change tracking for table Post ALTER TABLE Post DISABLE CHANGE_TRACKING; -- disable change tracking for database Blog ALTER DATABASE Blog SET CHANGE_TRACKING = OFF; You can read about the differences between the two options here. Choose the one that best suits your needs! SyntaxHighlighter.config.clipboardSwf = 'http://alexgorbatchev.com/pub/sh/2.0.320/scripts/clipboard.swf'; SyntaxHighlighter.brushes.CSharp.aliases = ['c#', 'c-sharp', 'csharp']; SyntaxHighlighter.brushes.Xml.aliases = ['xml']; SyntaxHighlighter.all();

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• Language Club – Battle of the Dynamic Languages

  - by Ben Griswold

  After dedicating the last eight weeks to learning Ruby, it’s time to move onto another language.  I really dig Ruby.  I really enjoy its dynamism and expressiveness and always-openness and it’s been the highlight of our coding club for me so far. But that’s just my take on the language.  I know a lot of coders who’s stomachs turn with the mere thought of Ruby.  They say it’s Ruby’s openness which has them feeling uneasy.  I’d say “write a bunch of tests and get over it,” but I figure there must be more to it than always open classes and possible method collisions. Yes, there’s something else to it alright. The folks who didn’t fall head over heals for Ruby are already in love with Python.  You might remember that Python was the first language we tackled in our coding club.  My time with Python was okay but it didn’t feel as natural to me as Ruby.  But let’s say we started with Ruby and then moved onto Python.  Would I see Python in a different light right now.  Might I even prefer Python over Ruby?  I suppose it’s possible but it’s pretty tough to test that theory – unless we visit Python for a second time. That’s right. The language club is going to focus on Python again and in my attempt to learn Python – yet again – in the open, I’ll be posting my solutions here just as I did for Ruby.  We don’t always have second chances so I going about this relearning with two primary goals in mind:  First, I’m going to use IronPython and the IronPython tools which provide a Python code editor, a file-based project system, and an interactive Python interpreter, all inside Visual Studio 2010.  As a note, the IronPython tools are now part of the main IronPython installer which is Version 2.7 Alpha 1 (not the latest stable version, 2.6.1) and I’d be crazy not to use them.  Second, I’d like to make sure I’m still learning Python without a complete MS skew so I’m going to run my code through Eclipse using the PyDev plugin as well.  Heck, I might use IDLE too. I already have this setup on my machine so it’s no big deal. Okay, that’s it for now.  I worked on the first ten Euler problems last night and the solutions will be posted shortly. Wish me luck.

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• Running Windows Phone Developers Tools CTP under VMWare Player - Yes you can! - But do you want to?

  - by Liam Westley

  This blog is the result of a quick investigation of running the Windows Phone Developer Tools CTP under VMWare Player.  In the release notes for Windows Phone Developer Tools CTP it mentions that it is not supported under VirtualPC or Hyper-V.  Some developers have policies where ‘no non-production code’ can be installed on their development workstation and so the only way they can use a CTP like this is in a virtual machine. The dilemma here is that the emulator for Windows Phone itself is a virtual machine and running a virtual machine within another virtual machine is normally frowned upon.  Even worse, previous Windows Mobile emulators detected they were in a virtual machine and refused to run.  Why VMWare? I selected VMWare as a possible solution as it is possible to run VMWare ESXi under VMWare Workstation by manually setting configuration options in the VMX configuration file so that it does not detect the presence of a virtual environment. I actually found that I could use VMWare Player (the free version, that can now create VM images) and that there was no need for any editing of the configuration file (I tried various switches, none of which made any difference to performance). So you can run the CTP under VMWare Player, that’s the good news. The bad news is that it is incredibly slow, bordering on unusable.  However, if it’s the only way you can use the CTP, at least this is an option. VMWare Player configuration I used the latest VMWare Player, 3.0, running under Windows x64 on my HP 6910p laptop with an Intel T7500 Dual Core CPU running at 2.2GHz, 4Gb of memory and using a separate drive for the virtual machines. I created a machine in VMWare Player with a single CPU, 1536 Mb memory and installed Windows 7 x64 from an ISO image.  I then performed a Windows Update, installed VMWare Tools, and finally the Windows Phone Developer Tools CTP After a few warnings about performance, I configured Windows 7 to run with Windows 7 Basic theme rather than use Aero (which is available under VMWare Player as it has a WDDM driver). Timings As a test I first launched Microsoft Visual Studio 2010 Express for Windows Phone, and created a default Windows Phone Application project.  I then clicked the run button, which starts the emulator and then loads the default application onto the emulator. For the second test I left the emulator running, stopped the default application, added a single button to change the page title and redeployed to the already running emulator by clicking the run button.   Test 1 (1st run) Test 2 (emulator already running)   VMWare Player 10 minutes  1 minute   Windows x64 native 1 minute  < 10 seconds   Conclusion You can run the Windows Phone Developer Tools CTP under VMWare Player, but it’s really, really slow and you would have to have very good reasons to try this approach. If you need to keep a development system free of non production code, and the two systems aren’t required to run simultaneously, then I’d consider a boot from VHD option.  Then you can completely isolate the Windows Phone Developer Tools CTP and development environment into a single VHD separate from your main development system.

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• Setting up OpenGL camera with off-center perspective

  - by user5484

  Hi, I'm using OpenGL ES (in iOS) and am struggling with setting up a viewport with an off-center distance point. Consider a game where you have a character in the left hand side of the screen, and some controls alpha'd over the left-hand side. The "main" part of the screen is on the right, but you still want to show whats in the view on the left. However when the character moves "forward" you want the character to appear to be going "straight", or "up" on the device, and not heading on an angle to the point that is geographically at the mid-x position in the screen. Here's the jist of how i set my viewport up where it is centered in the middle: // setup the camera // glMatrixMode(GL_PROJECTION); glLoadIdentity(); const GLfloat zNear = 0.1; const GLfloat zFar = 1000.0; const GLfloat fieldOfView = 90.0; // can definitely adjust this to see more/less of the scene GLfloat size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0); CGRect rect; rect.origin = CGPointMake(0.0, 0.0); rect.size = CGSizeMake(backingWidth, backingHeight); glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / (rect.size.width / rect.size.height), zNear, zFar); glMatrixMode(GL_MODELVIEW); // rotate the whole scene by the tilt to face down on the dude const float tilt = 0.3f; const float yscale = 0.8f; const float zscale = -4.0f; glTranslatef(0.0, yscale, zscale); const int rotationMinDegree = 0; const int rotationMaxDegree = 180; glRotatef(tilt * (rotationMaxDegree - rotationMinDegree) / 2, 1.0f, 0.0f, 0.0f); glTranslatef(0, -yscale, -zscale); static float b = -25; //0; static float c = 0; // rotate by to face in the direction of the dude float a = RADIANS_TO_DEGREES(-atan2f(-gCamera.orientation.x, -gCamera.orientation.z)); glRotatef(a, 0.0, 1.0, 0.0); // and move to where it is glTranslatef(-gCamera.pos.x, -gCamera.pos.y, -gCamera.pos.z); // draw the rest of the scene ... I've tried a variety of things to make it appear as though "the dude" is off to the right: - do a translate after the frustrum to the x direction - do a rotation after the frustrum about the up/y-axis - move the camera with a biased lean to the left of the dude Nothing i do seems to produce good results, the dude will either look like he's stuck on an angle, or the whole scene will appear tilted. I'm no OpenGL expert, so i'm hoping someone can suggest some ideas or tricks on how to "off-center" these model views in OpenGL. Thanks!

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• Paying by Cash

  - by David Dorf

  I'll grant you paying by cash in the context of stores isn't particularly interesting, but in my quest to try new payment methods I decided to pay by cash at an online store. Using a credit card means I have to hoist myself off the couch, find the card, and enter all those digits. Google Checkout certainly makes that task easier by storing my credit card information, but what happens to all those people that don't have a credit card? What about the ones that are afraid to use credit cards over the internet. There are three main options for cash payment, not all of which are accepted by every merchant. The most popular is PayPal. The issue I have with them is that returns and disputes have to be handled with PayPal, not the merchant. I once used PayPal at a shady online store and lost my money. Yeah, my bad but they wouldn't help me at all. PayPal was purchased by eBay in 2002. BillMeLater is best for larger purchases, because at checkout they actually run a credit check to make sure you're credit worthy. Assuming you are, they pay the merchant on your behalf and mail you a bill, which you better pay quickly or interest will start to accrue. That's nice for the merchant because they get paid right away, and I presume there's no charge-backs. BillMeLater was purchased by eBay in 2008. Last night I tried eBillMe for the first time. After checkout, they send you a bill via email and expect you to pay either via online banking (they provide the instructions to set everything up) or walk-in locations across the US (typically banks). The process was quick and easy. The merchant doesn't ship the product until the bill is paid, so there's a day or two delay. For the merchant there are no charge-backs, and the fees are less than credit cards. For the shopper, they provide buyer protection similar to that offered by credit cards, and 1% cashback on purchases. Once the online bill-pay is setup, its easy to reuse in the future. Seems like a win-win for merchants and shoppers.

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• ORM Profiler v1.1 has been released!

  - by FransBouma

  We've released ORM Profiler v1.1, which has the following new features: Real time profiling A real time viewer (RTV) has been added, which gives insight in the activity as it is received by the client, in two views: a chronological connection overview and an activity graph overview. This RTV allows the user to directly record to a snapshot using record buttons, pause the view, mark a range to create a snapshot from that range, and view graphs about the # of connection open actions and # of commands per second. The RTV has a 'range' in which it keeps live data and auto-cleans data that's older than this range. Screenshot of the activity graphs part of the real-time viewer: Low-level activity tab A new tab has been added to the Application tabs: the Low-level activity tab. This tab shows the main activity as it has been received over the named pipe. It can help to get insight in the chronological activity without the grouping over connections, so multiple connections at the same time per thread are easier to spot. Clicking a command will sync the rest of the application tabs, clicking a row will show the details below the splitter bar, as it is done with the other application tabs as well. Default application name in interceptor When an empty string or null is passed for application name to the Initialize method of the interceptor, the AppDomain's friendly name is used instead. Copy call stack to clipboard A call stack viewed in a grid in various parts of the UI is now copyable to the clipboard by clicking a button. Enable/Disable interceptor from the config file It's now possible to enable/disable the interceptor Initialization from the application's config file, using: Code: <appSettings> <add key="ORMProfilerEnabled" value="true"/> </appSettings> if value is true, the interceptor's Initialize method will proceed. If the value is false, the interceptor's Initialize method will not proceed and initialization won't be performed, meaning no interception will take place. If the setting is absent, or misconfigured, the Initialize method will proceed as normal and perform the initialization. Stored procedure calls for select databases are now properly displayed as a call For the databases: SQL Server, Oracle, DB2, Sybase ASA, Sybase ASE and Informix a stored procedure call is displayed as an execute/call statement and copy to clipboard works as-is. I'm especially happy with the new real-time profiling feature in ORM Profiler, which is the flagship feature for this release: it offers a completely new way to use the profiler, namely directly during debugging: you can immediately see what's going on without the necessity of a snapshot. The activity graph feature combined with the auto-cleanup of older data, allows you to keep the profiler open for a long period of time and see any spike of activity on the profiled application.

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• Func Delegate in C#

  - by Jalpesh P. Vadgama

  We already know about delegates in C# and I have previously posted about basics of delegates in C#. Following are posts about basic of delegates I have written. Delegates in C# Multicast Delegates in C# In this post we are going to learn about Func Delegates in C#. As per MSDN following is a definition. “Encapsulates a method that has one parameter and returns a value of the type specified by the TResult parameter.” Func can handle multiple arguments. The Func delegates is parameterized type. It takes any valid C# type as parameter and you have can multiple parameters and also you have specify the return type as last parameters. Followings are some examples of parameters. Func<int T,out TResult> Func<int T,int T, out Tresult> Now let’s take a string concatenation example for that. I am going to create two func delegate which will going to concate two strings and three string. Following is a code for that. using System; using System.Collections.Generic; namespace FuncExample { class Program { static void Main(string[] args) { Func<string, string, string> concatTwo = (x, y) => string.Format("{0} {1}",x,y); Func<string, string, string, string> concatThree = (x, y, z) => string.Format("{0} {1} {2}", x, y,z); Console.WriteLine(concatTwo("Hello", "Jalpesh")); Console.WriteLine(concatThree("Hello","Jalpesh","Vadgama")); Console.ReadLine(); } } } As you can see in above example, I have create two delegates ‘concatTwo’ and ‘concatThree. The first concat two strings and another concat three strings. If you see the func statements the last parameter is for the out as here its output string so I have written string as last parameter in both statements. Now it’s time to run the example and as expected following is output. That’s it. Hope you like it. Stay tuned for more updates.

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• How to handle "circular dependency" in dependency injection

  - by Roel

  The title says "Circular Dependency", but it is not the correct wording, because to me the design seems solid. However, consider the following scenario, where the blue parts are given from external partner, and orange is my own implementation. Also assume there is more then one ConcreteMain, but I want to use a specific one. (In reality, each class has some more dependencies, but I tried to simplify it here) I would like to instanciate all of this with Depency Injection (Unity), but I obviously get a StackOverflowException on the following code, because Runner tries to instantiate ConcreteMain, and ConcreteMain needs a Runner. IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); How can I avouid this? Is there any way to structure this so that I can use it with DI? The scenario I'm doing now is setting everything up manually, but that puts a hard dependency on ConcreteMain in the class which instantiates it. This is what i'm trying to avoid (with Unity registrations in configuration). All source code below (very simplified example!); public class Program { public static void Main(string[] args) { IUnityContainer ioc = new UnityContainer(); ioc.RegisterType<IMain, ConcreteMain>() .RegisterType<IMainCallback, Runner>(); var runner = ioc.Resolve<Runner>(); Console.WriteLine("invoking runner..."); runner.DoSomethingAwesome(); Console.ReadLine(); } } public class Runner : IMainCallback { private readonly IMain mainServer; public Runner(IMain mainServer) { this.mainServer = mainServer; } public void DoSomethingAwesome() { Console.WriteLine("trying to do something awesome"); mainServer.DoSomething(); } public void SomethingIsDone(object something) { Console.WriteLine("hey look, something is finally done."); } } public interface IMain { void DoSomething(); } public interface IMainCallback { void SomethingIsDone(object something); } public abstract class AbstractMain : IMain { protected readonly IMainCallback callback; protected AbstractMain(IMainCallback callback) { this.callback = callback; } public abstract void DoSomething(); } public class ConcreteMain : AbstractMain { public ConcreteMain(IMainCallback callback) : base(callback){} public override void DoSomething() { Console.WriteLine("starting to do something..."); var task = Task.Factory.StartNew(() =>{ Thread.Sleep(5000);/*very long running task*/ }); task.ContinueWith(t => callback.SomethingIsDone(true)); } }

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• How to Customize the Internet Explorer 8 Title Bar

  - by Mysticgeek

  If you’re looking for a way to personalize IE 8, one method is to customize the Title Bar. Here we look at a simple Registry hack that will get the job done. The Internet Explorer Title Bar is displayed on the top of the browser with the site name followed by Windows Internet Explorer by default. If you have a small office you might want to change it to the company name, or just change it something more personal at home.   Customize the IE 8 Title Bar Note: Before making any changes to the Registry, make sure to back it up. The first thing we need to do is open the Registry by typing regedit into the Search box in the Start Menu and hit Enter. With the Registry open, navigate to HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main. Then create a new String Value and name it Window Title. Right-click on the Window Title String and enter in whatever you want to display on the Title Bar in the Value data field and click OK. When you’re done, you should see the new String called Windows Title with whatever you entered in as the value. Close out of the Registry. Restart or launch Internet Explorer and you’ll now see your new text in the Title Bar. If you want to change it to something else, just go in and modify the Value data. If you want to switch it back to the default, just go back in and delete the string we created. A lot of times you’ll see corporate branding already in the title bar from your ISP or some computer company. To get rid of it, check out The Geek’s article on how to remove it. This should work with other versions of Internet Explorer as well. Similar Articles Productive Geek Tips Remove ISP Text or Corporate Branding from Internet Explorer Title BarReset All Internet Explorer 8 Settings to Fix Stability ProblemsMysticgeek Blog: A Look at Internet Explorer 8 Beta 1 on Windows XPDisable Third Party Extensions in Internet ExplorerToggle Flash On or Off in Internet Explorer the Easy Way TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Acronis Online Backup DVDFab 6 Revo Uninstaller Pro Registry Mechanic 9 for Windows Video Toolbox is a Superb Online Video Editor Fun with 47 charts and graphs Tomorrow is Mother’s Day Check the Average Speed of YouTube Videos You’ve Watched OutlookStatView Scans and Displays General Usage Statistics How to Add Exceptions to the Windows Firewall

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• Web application / Domain model integration using JSON capable DTOs [on hold]

  - by g-makulik

  I'm a bit confused about architectural choices for the web-applications/java/python world. For c/c++ world the available (open source) choices to implement web applications is pretty limited to zero, involving java or python the choices explode to a,- hard to sort out -, mess of available 'frameworks' and application approaches. I want to sort out a clean MVC model, where the M stands for a fully blown (POCO, POJO driven) domain model (according M.Fowler's EAA pattern) using a mature OO language (Java,C++) for implementation. The background is: I have a system with certain hardware components (that introduce system immanent active behavior) and a configuration database for system meta and HW-components configuration data (these are even usually self contained, since the HW-components are capable to persist their configuration data anyway). For realization of the configuration/status data exchange protocol with the HW-components we have chosen the Google Protobuf format, which works well for the directly wired communication with these components. This protocol is already used successfully with a Java based GUI application via TCP/IP connection to the main system controlling HW-component. This application has some drawbacks and design flaws for historical reasons. Now we want to develop an abstract model (domain model) for configuration and monitoring those HW-components, that represents a more use case oriented view to the overall system behavior. I have the feeling that a plain Java class model would fit best for this (c++ implementation seems to have too much implementation/integration overhead with viable language-bridge interfaces). Google Protobuf message definitions could still serve well to describe DTO objects used to interact with a domain model API. But integrating Google Protobuf messages client side for e.g. data binding in the current view doesn't seem to be a good choice. I'm thinking about some extra serialization features, e.g. for JSON based data exchange with the views/controllers. Most lightweight solutions seem to involve a python based presentation layer using JSON based data transfer (I'm at least not sure to be fully informed about this). Is there some lightweight (applicable for a limited ARM Linux platform) framework available, supporting such architecture to realize a web-application? UPDATE: According to my recent research and comments of colleagues I've noticed that using Java (and some JVM) might not be the preferable choice for integration with python on a limited linux system as we have (running on ARM9 with hard to discuss memory and MCU costs), but C/C++ modules would do well for this (since this forms the native interface to python extensions, doesn't it?). I can imagine to provide a domain model from an appropriate C/C++ API (though I still think it's more efforts and higher skill requirements for the involved developers to do with these languages). Still I'm searching for a good approach that supports such architecture. I'll appreciate any pointers!

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• Windows Azure Use Case: High-Performance Computing (HPC)

  - by BuckWoody

  This is one in a series of posts on when and where to use a distributed architecture design in your organization's computing needs. You can find the main post here: http://blogs.msdn.com/b/buckwoody/archive/2011/01/18/windows-azure-and-sql-azure-use-cases.aspx  Description: High-Performance Computing (also called Technical Computing) at its most simplistic is a layout of computer workloads where a “head node” accepts work requests, and parses them out to “worker nodes'”. This is useful in cases such as scientific simulations, drug research, MatLab work and where other large compute loads are required. It’s not the immediate-result type computing many are used to; instead, a “job” or group of work requests is sent to a cluster of computers and the worker nodes work on individual parts of the calculations and return the work to the scheduler or head node for the requestor in a batch-request fashion. This is typical to the way that many mainframe computing use-cases work. You can use commodity-based computers to create an HPC Cluster, such as the Linux application called Beowulf, and Microsoft has a server product for HPC using standard computers, called the Windows Compute Cluster that you can read more about here. The issue with HPC (from any vendor) that some organization have is the amount of compute nodes they need. Having too many results in excess infrastructure, including computers, buildings, storage, heat and so on. Having too few means that the work is slower, and takes longer to return a result to the calling application. Unless there is a consistent level of work requested, predicting the number of nodes is problematic. Implementation: Recently, Microsoft announced an internal partnership between the HPC group (Now called the Technical Computing Group) and Windows Azure. You now have two options for implementing an HPC environment using Windows. You can extend the current infrastructure you have for HPC by adding in Compute Nodes in Windows Azure, using a “Broker Node”.  You can then purchase time for adding machines, and then stop paying for them when the work is completed. This is a common pattern in groups that have a constant need for HPC, but need to “burst” that load count under certain conditions. The second option is to install only a Head Node and a Broker Node onsite, and host all Compute Nodes in Windows Azure. This is often the pattern for organizations that need HPC on a scheduled and periodic basis, such as financial analysis or actuarial table calculations. References: Blog entry on Hybrid HPC with Windows Azure: http://blogs.msdn.com/b/ignitionshowcase/archive/2010/12/13/high-performance-computing-on-premise-and-in-the-windows-azure-cloud.aspx  Links for further research on HPC, includes Windows Azure information: http://blogs.msdn.com/b/ncdevguy/archive/2011/02/16/handy-links-for-hpc-and-azure.aspx 

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• Manage Your Twitter Account from the Sidebar in Firefox

  - by Asian Angel

  Are you a Twitter addict and need an easy way to manage your account in Firefox? Now you can access Twitter in your Sidebar or as a separate window with the TwitKit+ extension for Firefox. Accessing TwitKit+ There are three ways that you can access TwitKit+ after installing the extension. The first is by adding the “Toolbar Button” to your browser’s UI. The second and third methods are through the “View & Tools Menus”.   TwitKit+ in Action When you open TwitKit+ for the first time you will see Twitter’s “Public Tweet Stream”. To get started login into your account. Note: If you do not care for the “brown theme” you can select a different one in “Preferences”. Here is a closer look at the top area and the commands available. Notice the “blue arrow symbol” in the upper left corner…very useful if you want to separate TwitKit+ from your main browser window for a bit. Secure Mode, Undock, Preferences, Login/Logout Google Search, Twitter Search, Copy Selection To Status Box, Shorten Selected URL Public, User, Friends, Followers, @ Messages, Direct Messages, Profile Note: To use Google or Twitter search enter your term in the “Status Area” and click on the appropriate service icon. Here is the regular timeline for our account…the “clickable tab buttons” make everything easy to view and work with. You can perform actions such as replying, retweeting, marking as a favorite, etc. using the set of “management buttons” at the bottom of each tweet. To add a new tweet to your timeline enter your text and press “Enter”. A look at the “Following List” for our account. Having a more defined and separate “view categories” set makes this better than directly accessing the Twitter website. Preferences The preferences can be quickly sorted out…choose how often the timeline is updated, name display, favorite URL shortening service, theme, and font size. Note: The default connection setting is for “Secure Access”. Conclusion TwitKit+ makes a nice addition to Firefox for anyone who loves keeping up with Twitter throughout the day. There when you want it and out of your way the rest of the time. Links Download the TwitKit+ extension (Mozilla Add-ons) Similar Articles Productive Geek Tips Move Add-on Management to the Sidebar in FirefoxPreview and Manage Multiple Tabs in Firefox with Tab SidebarDisable Windows Sidebar in VistaQuick Tip: Use Google Talk Sidebar in FirefoxRun Windows Sidebar Gadgets Without the Sidebar TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Enable Check Box Selection in Windows 7 OnlineOCR – Free OCR Service Betting on the Blind Side, a Vanity Fair article 30 Minimal Logo Designs that Say More with Less LEGO Digital Designer – Free Create a Personal Website Quickly using Flavors.me

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• Manage Your Twitter Account from the Sidebar in Firefox

  - by Asian Angel

  Are you a Twitter addict and need an easy way to manage your account in Firefox? Now you can access Twitter in your Sidebar or as a separate window with the TwitKit+ extension for Firefox. Accessing TwitKit+ There are three ways that you can access TwitKit+ after installing the extension. The first is by adding the “Toolbar Button” to your browser’s UI. The second and third methods are through the “View & Tools Menus”.   TwitKit+ in Action When you open TwitKit+ for the first time you will see Twitter’s “Public Tweet Stream”. To get started login into your account. Note: If you do not care for the “brown theme” you can select a different one in “Preferences”. Here is a closer look at the top area and the commands available. Notice the “blue arrow symbol” in the upper left corner…very useful if you want to separate TwitKit+ from your main browser window for a bit. Secure Mode, Undock, Preferences, Login/Logout Google Search, Twitter Search, Copy Selection To Status Box, Shorten Selected URL Public, User, Friends, Followers, @ Messages, Direct Messages, Profile Note: To use Google or Twitter search enter your term in the “Status Area” and click on the appropriate service icon. Here is the regular timeline for our account…the “clickable tab buttons” make everything easy to view and work with. You can perform actions such as replying, retweeting, marking as a favorite, etc. using the set of “management buttons” at the bottom of each tweet. To add a new tweet to your timeline enter your text and press “Enter”. A look at the “Following List” for our account. Having a more defined and separate “view categories” set makes this better than directly accessing the Twitter website. Preferences The preferences can be quickly sorted out…choose how often the timeline is updated, name display, favorite URL shortening service, theme, and font size. Note: The default connection setting is for “Secure Access”. Conclusion TwitKit+ makes a nice addition to Firefox for anyone who loves keeping up with Twitter throughout the day. There when you want it and out of your way the rest of the time. Links Download the TwitKit+ extension (Mozilla Add-ons) Similar Articles Productive Geek Tips Move Add-on Management to the Sidebar in FirefoxPreview and Manage Multiple Tabs in Firefox with Tab SidebarDisable Windows Sidebar in VistaQuick Tip: Use Google Talk Sidebar in FirefoxRun Windows Sidebar Gadgets Without the Sidebar TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips Revo Uninstaller Pro Registry Mechanic 9 for Windows PC Tools Internet Security Suite 2010 PCmover Professional Enable Check Box Selection in Windows 7 OnlineOCR – Free OCR Service Betting on the Blind Side, a Vanity Fair article 30 Minimal Logo Designs that Say More with Less LEGO Digital Designer – Free Create a Personal Website Quickly using Flavors.me

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• Gparted Partition Mount Points Alternate Between 2 Physical Disk Drives

  - by California Ken

  I'm running Ubuntu Server 14.04 on a system with 2 physical disk drives. I am frequently seeing mount errors on startup. When I check the drive partitions using GPARTED, I see that my two "non-system created" data partitions have the wrong disk assignments (i.e. sda1 vs sdb1) or visa-versa. If I hand edit /etc/fstab to match GPARTED, the system will boot error free one time. On the second restart I will get the "serious mount problem" error for the 2 data partitions and when I check GPARTED, the disk assignments have changed again (again, GPARTED and fstab don't match). A listing of my /etc/fstab is: /etc/fstab: static file system information. # Use 'blkid' to print the universally unique identifier for a device; this may be used with UUID= as a more robust way to name devices that works even if disks are added and removed. See fstab(5). # / was on /dev/sdb2 during installation UUID=766a06a4-e5af-484a-adf0-fa1e88da7212 / ext4 errors=remount-ro,user_xattr,acl,barrier=1 0 1 swap was on /dev/sda6 during installation UUID=8c42f835-ead3-43fb-88d8-196f5dfc3aa7 none swap sw 0 0 swap was on /dev/sdb3 during installation UUID=2214deec-ba98-47da-aea7-4e46998f3e57 none swap sw 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 /dev/sda1 /media/ken/Linux-Data ext3 defaults 0 2 /dev/sda5 /media/ken/Data2 ext4 defaults 0 2 The device designations in the last 2 lines are the ones in question. The fstab entries to NOT change between system restarts but the mount points in the GPARTED display do. Does anyone have a fix for this? Thanks Mr. Young and Mr Gedak, Following is my fstab file and two blkid outputs. The fstab output is correct. The first blkid output was after a reboot and is WRONG! The sda and sdb device partition data is reversed. The 2nd blkid output was after a second reboot (fstab not changed). It shows the sda and adb partition data CORRECTLY. I didn't see any duplicate UUIDs. Does anyone have any idea why the GPARTED and blkid outputs alternate on consecutive reboots? The alternating partition data is real since when the partition assignments are reversed, the boot sequence halts with disk mounting errers (I have to press "s" to skip the mounts). Thanks again. Ken I copied the contents of a text file showing my fstab and 2 blkid outputs. The text file contents show up in the text entry box but does not appear in the main body of the question. Is there a way I can attach the text file or edit this question so that the text is displayed for question viewers?

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• Have you really fixed that problem?

  - by DavidWimbush

  The day before yesterday I saw our main live server's CPU go up to constantly 100% with just the occasional short drop to a lower level. The exact opposite of what you'd want to see. We're log shipping every 15 minutes and part of that involves calling WinRAR to compress the log backups before copying them over. (We're on SQL2005 so there's no native compression and we have bandwidth issues with the connection to our remote site.) I realised the log shipping jobs were taking about 10 minutes and that most of that was spent shipping a 'live' reporting database that is completely rebuilt every 20 minutes. (I'm just trying to keep this stuff alive until I can improve it.) We can rebuild this database in minutes if we have to fail over so I disabled log shipping of that database. The log shipping went down to less than 2 minutes and I went off to the SQL Social evening in London feeling quite pleased with myself. It was a great evening - fun, educational and thought-provoking. Thanks to Simon Sabin & co for laying that on, and thanks too to the guests for making the effort when they must have been pretty worn out after doing DevWeek all day first. The next morning I came down to earth with a bump: CPU still at 100%. WTF? I looked in the activity monitor but it was confusing because some sessions have been running for a long time so it's not a good guide what's using the CPU now. I tried the standard reports showing queries by CPU (average and total) but they only show the top 10 so they just show my big overnight archiving and data cleaning stuff. But the Profiler showed it was four queries used by our new website usage tracking system. Four simple indexes later the CPU was back where it should be: about 20% with occasional short spikes. So the moral is: even when you're convinced you've found the cause and fixed the problem, you HAVE to go back and confirm that the problem has gone. And, yes, I have checked the CPU again today and it's still looking sweet.

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• NoSQL is not about object databases

  - by Bertrand Le Roy

  NoSQL as a movement is an interesting beast. I kinda like that it’s negatively defined (I happen to belong myself to at least one other such a-community). It’s not in its roots about proposing one specific new silver bullet to kill an old problem. it’s about challenging the consensus. Actually, blindly and systematically replacing relational databases with object databases would just replace one set of issues with another. No, the point is to recognize that relational databases are not a universal answer -although they have been used as one for so long- and recognize instead that there’s a whole spectrum of data storage solutions out there. Why is it so hard to recognize, by the way? You are already using some of those other data storage solutions every day. Let me cite a few: The file system Active Directory XML / JSON documents The Web e-mail Logs Excel files EXIF blobs in your photos Relational databases And yes, object databases It’s just a fact of modern life. Notice by the way that most of the data that you use every day is unstructured and thus mostly unsuitable for relational storage. It really is more a matter of recognizing it: you are already doing NoSQL. So what happens when for any reason you need to simultaneously query two or more of these heterogeneous data stores? Well, you build an index of sorts combining them, and that’s what you query instead. Of course, there’s not much distance to travel from that to realizing that querying is better done when completely separated from storage. So why am I writing about this today? Well, that’s something I’ve been giving lots of thought, on and off, over the last ten years. When I built my first CMS all that time ago, one of the main problems my customers were facing was to manage and make sense of the mountain of unstructured data that was constituting most of their business. The central entity of that system was the file system because we were dealing with lots of Word documents, PDFs, OCR’d articles, photos and static web pages. We could have stored all that in SQL Server. It would have worked. Ew. I’m so glad we didn’t. Today, I’m working on Orchard (another CMS ;). It’s a pretty young project but already one of the questions we get the most is how to integrate existing data. One of the ideas I’ll be trying hard to sell to the rest of the team in the next few months is to completely split the querying from the storage. Not only does this provide great opportunities for performance optimizations, it gives you homogeneous access to heterogeneous and existing data sources. For free.

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• BI Publisher - Hottest Show in Vegas

  - by mike.donohue

  Two days down, two to go. Monday was a very busy and rewarding day. Attended "XML Publisher and FSG for Beginners" given by Susan Behn and Alyssa Johnson from Solution Beacon. It was packed, standing room only ... even though it was at 8:00 am. Later in the afternoon, despite being at the same time and in conflict with other Publisher related sessions, Noelle's session, "The Reporting Platform for Applications: Oracle Business Intelligence Publisher" and my session, "Introduction to Oracle Business Intelligence Publisher" were both very well attended. Immediately following our presentations we ran the BI Publisher Hands On Lab which was great fun. The turnout was so large that unfortunately we could not accommodate everyone who came to the lab. There were as many as 5 people huddled around each of the 20 machines. All the the groups completed the 2 main exercises. Some groups even took the product for an off-road test drive. Look at all the fun we had ... For those who could not attend or want the Hands On Lab document: Hands On Lab Oracle BI Publisher Collaborate 2010.pdf Note that these lab instructions assume a specific set up and files that you may not have in your environment. You can download and install a trial license version of BI Publisher from the download page. Highly recommend taking a look at the additional Tutorials available on OTN. Big thanks to Dan Vlamis and Jonathan Clark from Vlamis Software Solutions and to the Oracle BIWA SIG for setting up these machines and getting the time and space to run this lab. It was inspiring to see all of the attendees successfully creating reports. On Tuesday morning we were up early again for a rousing session of BI Publisher Best Practices that was also, very well attended especially considering the 8 am start. Later that morning saw Ben Bruno from STR Software and two of his customers speak on the additional functionality and ROI they have achieved by using Publisher within EBS and AventX to FAX and Email Publisher generated documents. Spent the afternoon staffing the BI Technology demo pod and had a steady flow of people dropping by with questions. Having a great conference so far and looking forward to the rest of it.

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• Security Issues with Single Page Apps

  - by Stephen.Walther

  Last week, I was asked to do a code review of a Single Page App built using the ASP.NET Web API, Durandal, and Knockout (good stuff!). In particular, I was asked to investigate whether there any special security issues associated with building a Single Page App which are not present in the case of a traditional server-side ASP.NET application. In this blog entry, I discuss two areas in which you need to exercise extra caution when building a Single Page App. I discuss how Single Page Apps are extra vulnerable to both Cross-Site Scripting (XSS) attacks and Cross-Site Request Forgery (CSRF) attacks. This goal of this blog post is NOT to persuade you to avoid writing Single Page Apps. I’m a big fan of Single Page Apps. Instead, the goal is to ensure that you are fully aware of some of the security issues related to Single Page Apps and ensure that you know how to guard against them. Cross-Site Scripting (XSS) Attacks According to WhiteHat Security, over 65% of public websites are open to XSS attacks. That’s bad. By taking advantage of XSS holes in a website, a hacker can steal your credit cards, passwords, or bank account information. Any website that redisplays untrusted information is open to XSS attacks. Let me give you a simple example. Imagine that you want to display the name of the current user on a page. To do this, you create the following server-side ASP.NET page located at http://MajorBank.com/SomePage.aspx: <%@Page Language="C#" %> <html> <head> <title>Some Page</title> </head> <body> Welcome <%= Request["username"] %> </body> </html> Nothing fancy here. Notice that the page displays the current username by using Request[“username”]. Using Request[“username”] displays the username regardless of whether the username is present in a cookie, a form field, or a query string variable. Unfortunately, by using Request[“username”] to redisplay untrusted information, you have now opened your website to XSS attacks. Here’s how. Imagine that an evil hacker creates the following link on another website (hackers.com): <a href="/SomePage.aspx?username=<script src=Evil.js></script>">Visit MajorBank</a> Notice that the link includes a query string variable named username and the value of the username variable is an HTML <SCRIPT> tag which points to a JavaScript file named Evil.js. When anyone clicks on the link, the <SCRIPT> tag will be injected into SomePage.aspx and the Evil.js script will be loaded and executed. What can a hacker do in the Evil.js script? Anything the hacker wants. For example, the hacker could display a popup dialog on the MajorBank.com site which asks the user to enter their password. The script could then post the password back to hackers.com and now the evil hacker has your secret password. ASP.NET Web Forms and ASP.NET MVC have two automatic safeguards against this type of attack: Request Validation and Automatic HTML Encoding. Protecting Coming In (Request Validation) In a server-side ASP.NET app, you are protected against the XSS attack described above by a feature named Request Validation. If you attempt to submit “potentially dangerous” content — such as a JavaScript <SCRIPT> tag — in a form field or query string variable then you get an exception. Unfortunately, Request Validation only applies to server-side apps. Request Validation does not help in the case of a Single Page App. In particular, the ASP.NET Web API does not pay attention to Request Validation. You can post any content you want – including <SCRIPT> tags – to an ASP.NET Web API action. For example, the following HTML page contains a form. When you submit the form, the form data is submitted to an ASP.NET Web API controller on the server using an Ajax request: <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title></title> </head> <body> <form data-bind="submit:submit"> <div> <label> User Name: <input data-bind="value:user.userName" /> </label> </div> <div> <label> Email: <input data-bind="value:user.email" /> </label> </div> <div> <input type="submit" value="Submit" /> </div> </form> <script src="Scripts/jquery-1.7.1.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { user: { userName: ko.observable(), email: ko.observable() }, submit: function () { $.post("/api/users", ko.toJS(this.user)); } }; ko.applyBindings(viewModel); </script> </body> </html> The form above is using Knockout to bind the form fields to a view model. When you submit the form, the view model is submitted to an ASP.NET Web API action on the server. Here’s the server-side ASP.NET Web API controller and model class: public class UsersController : ApiController { public HttpResponseMessage Post(UserViewModel user) { var userName = user.UserName; return Request.CreateResponse(HttpStatusCode.OK); } } public class UserViewModel { public string UserName { get; set; } public string Email { get; set; } } If you submit the HTML form, you don’t get an error. The “potentially dangerous” content is passed to the server without any exception being thrown. In the screenshot below, you can see that I was able to post a username form field with the value “<script>alert(‘boo’)</script”. So what this means is that you do not get automatic Request Validation in the case of a Single Page App. You need to be extra careful in a Single Page App about ensuring that you do not display untrusted content because you don’t have the Request Validation safety net which you have in a traditional server-side ASP.NET app. Protecting Going Out (Automatic HTML Encoding) Server-side ASP.NET also protects you from XSS attacks when you render content. By default, all content rendered by the razor view engine is HTML encoded. For example, the following razor view displays the text “<b>Hello!</b>” instead of the text “Hello!” in bold: @{ var message = "<b>Hello!</b>"; } @message   If you don’t want to render content as HTML encoded in razor then you need to take the extra step of using the @Html.Raw() helper. In a Web Form page, if you use <%: %> instead of <%= %> then you get automatic HTML Encoding: <%@ Page Language="C#" %> <% var message = "<b>Hello!</b>"; %> <%: message %> This automatic HTML Encoding will prevent many types of XSS attacks. It prevents <script> tags from being rendered and only allows &lt;script&gt; tags to be rendered which are useless for executing JavaScript. (This automatic HTML encoding does not protect you from all forms of XSS attacks. For example, you can assign the value “javascript:alert(‘evil’)” to the Hyperlink control’s NavigateUrl property and execute the JavaScript). The situation with Knockout is more complicated. If you use the Knockout TEXT binding then you get HTML encoded content. On the other hand, if you use the HTML binding then you do not: <!-- This JavaScript DOES NOT execute --> <div data-bind="text:someProp"></div> <!-- This Javacript DOES execute --> <div data-bind="html:someProp"></div> <script src="Scripts/jquery-1.7.1.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { someProp : "<script>alert('Evil!')<" + "/script>" }; ko.applyBindings(viewModel); </script>   So, in the page above, the DIV element which uses the TEXT binding is safe from XSS attacks. According to the Knockout documentation: “Since this binding sets your text value using a text node, it’s safe to set any string value without risking HTML or script injection.” Just like server-side HTML encoding, Knockout does not protect you from all types of XSS attacks. For example, there is nothing in Knockout which prevents you from binding JavaScript to a hyperlink like this: <a data-bind="attr:{href:homePageUrl}">Go</a> <script src="Scripts/jquery-1.7.1.min.js"></script> <script src="Scripts/knockout-2.1.0.js"></script> <script> var viewModel = { homePageUrl: "javascript:alert('evil!')" }; ko.applyBindings(viewModel); </script> In the page above, the value “javascript:alert(‘evil’)” is bound to the HREF attribute using Knockout. When you click the link, the JavaScript executes. Cross-Site Request Forgery (CSRF) Attacks Cross-Site Request Forgery (CSRF) attacks rely on the fact that a session cookie does not expire until you close your browser. In particular, if you visit and login to MajorBank.com and then you navigate to Hackers.com then you will still be authenticated against MajorBank.com even after you navigate to Hackers.com. Because MajorBank.com cannot tell whether a request is coming from MajorBank.com or Hackers.com, Hackers.com can submit requests to MajorBank.com pretending to be you. For example, Hackers.com can post an HTML form from Hackers.com to MajorBank.com and change your email address at MajorBank.com. Hackers.com can post a form to MajorBank.com using your authentication cookie. After your email address has been changed, by using a password reset page at MajorBank.com, a hacker can access your bank account. To prevent CSRF attacks, you need some mechanism for detecting whether a request is coming from a page loaded from your website or whether the request is coming from some other website. The recommended way of preventing Cross-Site Request Forgery attacks is to use the “Synchronizer Token Pattern” as described here: https://www.owasp.org/index.php/Cross-Site_Request_Forgery_%28CSRF%29_Prevention_Cheat_Sheet When using the Synchronizer Token Pattern, you include a hidden input field which contains a random token whenever you display an HTML form. When the user opens the form, you add a cookie to the user’s browser with the same random token. When the user posts the form, you verify that the hidden form token and the cookie token match. Preventing Cross-Site Request Forgery Attacks with ASP.NET MVC ASP.NET gives you a helper and an action filter which you can use to thwart Cross-Site Request Forgery attacks. For example, the following razor form for creating a product shows how you use the @Html.AntiForgeryToken() helper: @model MvcApplication2.Models.Product <h2>Create Product</h2> @using (Html.BeginForm()) { @Html.AntiForgeryToken(); <div> @Html.LabelFor( p => p.Name, "Product Name:") @Html.TextBoxFor( p => p.Name) </div> <div> @Html.LabelFor( p => p.Price, "Product Price:") @Html.TextBoxFor( p => p.Price) </div> <input type="submit" /> } The @Html.AntiForgeryToken() helper generates a random token and assigns a serialized version of the same random token to both a cookie and a hidden form field. (Actually, if you dive into the source code, the AntiForgeryToken() does something a little more complex because it takes advantage of a user’s identity when generating the token). Here’s what the hidden form field looks like: <input name=”__RequestVerificationToken” type=”hidden” value=”NqqZGAmlDHh6fPTNR_mti3nYGUDgpIkCiJHnEEL59S7FNToyyeSo7v4AfzF2i67Cv0qTB1TgmZcqiVtgdkW2NnXgEcBc-iBts0x6WAIShtM1″ /> And here’s what the cookie looks like using the Google Chrome developer toolbar: You use the [ValidateAntiForgeryToken] action filter on the controller action which is the recipient of the form post to validate that the token in the hidden form field matches the token in the cookie. If the tokens don’t match then validation fails and you can’t post the form: public ActionResult Create() { return View(); } [ValidateAntiForgeryToken] [HttpPost] public ActionResult Create(Product productToCreate) { if (ModelState.IsValid) { // save product to db return RedirectToAction("Index"); } return View(); } How does this all work? Let’s imagine that a hacker has copied the Create Product page from MajorBank.com to Hackers.com – the hacker grabs the HTML source and places it at Hackers.com. Now, imagine that the hacker trick you into submitting the Create Product form from Hackers.com to MajorBank.com. You’ll get the following exception: The Cross-Site Request Forgery attack is blocked because the anti-forgery token included in the Create Product form at Hackers.com won’t match the anti-forgery token stored in the cookie in your browser. The tokens were generated at different times for different users so the attack fails. Preventing Cross-Site Request Forgery Attacks with a Single Page App In a Single Page App, you can’t prevent Cross-Site Request Forgery attacks using the same method as a server-side ASP.NET MVC app. In a Single Page App, HTML forms are not generated on the server. Instead, in a Single Page App, forms are loaded dynamically in the browser. Phil Haack has a blog post on this topic where he discusses passing the anti-forgery token in an Ajax header instead of a hidden form field. He also describes how you can create a custom anti-forgery token attribute to compare the token in the Ajax header and the token in the cookie. See: http://haacked.com/archive/2011/10/10/preventing-csrf-with-ajax.aspx Also, take a look at Johan’s update to Phil Haack’s original post: http://johan.driessen.se/posts/Updated-Anti-XSRF-Validation-for-ASP.NET-MVC-4-RC (Other server frameworks such as Rails and Django do something similar. For example, Rails uses an X-CSRF-Token to prevent CSRF attacks which you generate on the server – see http://excid3.com/blog/rails-tip-2-include-csrf-token-with-every-ajax-request/#.UTFtgDDkvL8 ). For example, if you are creating a Durandal app, then you can use the following razor view for your one and only server-side page: @{ Layout = null; } <!DOCTYPE html> <html> <head> <title>Index</title> </head> <body> @Html.AntiForgeryToken() <div id="applicationHost"> Loading app.... </div> @Scripts.Render("~/scripts/vendor") <script type="text/javascript" src="~/App/durandal/amd/require.js" data-main="/App/main"></script> </body> </html> Notice that this page includes a call to @Html.AntiForgeryToken() to generate the anti-forgery token. Then, whenever you make an Ajax request in the Durandal app, you can retrieve the anti-forgery token from the razor view and pass the token as a header: var csrfToken = $("input[name='__RequestVerificationToken']").val(); $.ajax({ headers: { __RequestVerificationToken: csrfToken }, type: "POST", dataType: "json", contentType: 'application/json; charset=utf-8', url: "/api/products", data: JSON.stringify({ name: "Milk", price: 2.33 }), statusCode: { 200: function () { alert("Success!"); } } }); Use the following code to create an action filter which you can use to match the header and cookie tokens: using System.Linq; using System.Net.Http; using System.Web.Helpers; using System.Web.Http.Controllers; namespace MvcApplication2.Infrastructure { public class ValidateAjaxAntiForgeryToken : System.Web.Http.AuthorizeAttribute { protected override bool IsAuthorized(HttpActionContext actionContext) { var headerToken = actionContext .Request .Headers .GetValues("__RequestVerificationToken") .FirstOrDefault(); ; var cookieToken = actionContext .Request .Headers .GetCookies() .Select(c => c[AntiForgeryConfig.CookieName]) .FirstOrDefault(); // check for missing cookie or header if (cookieToken == null || headerToken == null) { return false; } // ensure that the cookie matches the header try { AntiForgery.Validate(cookieToken.Value, headerToken); } catch { return false; } return base.IsAuthorized(actionContext); } } } Notice that the action filter derives from the base AuthorizeAttribute. The ValidateAjaxAntiForgeryToken only works when the user is authenticated and it will not work for anonymous requests. Add the action filter to your ASP.NET Web API controller actions like this: [ValidateAjaxAntiForgeryToken] public HttpResponseMessage PostProduct(Product productToCreate) { // add product to db return Request.CreateResponse(HttpStatusCode.OK); } After you complete these steps, it won’t be possible for a hacker to pretend to be you at Hackers.com and submit a form to MajorBank.com. The header token used in the Ajax request won’t travel to Hackers.com. This approach works, but I am not entirely happy with it. The one thing that I don’t like about this approach is that it creates a hard dependency on using razor. Your single page in your Single Page App must be generated from a server-side razor view. A better solution would be to generate the anti-forgery token in JavaScript. Unfortunately, until all browsers support a way to generate cryptographically strong random numbers – for example, by supporting the window.crypto.getRandomValues() method — there is no good way to generate anti-forgery tokens in JavaScript. So, at least right now, the best solution for generating the tokens is the server-side solution with the (regrettable) dependency on razor. Conclusion The goal of this blog entry was to explore some ways in which you need to handle security differently in the case of a Single Page App than in the case of a traditional server app. In particular, I focused on how to prevent Cross-Site Scripting and Cross-Site Request Forgery attacks in the case of a Single Page App. I want to emphasize that I am not suggesting that Single Page Apps are inherently less secure than server-side apps. Whatever type of web application you build – regardless of whether it is a Single Page App, an ASP.NET MVC app, an ASP.NET Web Forms app, or a Rails app – you must constantly guard against security vulnerabilities.

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• Implicit Intent is not working [migrated]

  - by Sayem Siam

  I have a activity class named Notelist.In the Notelist class i have tried to insert a new note.For that i have used implicit Intent.But when i click to insert a new note it gives a run time error. public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.menu_add: Log.d("sayem", "in case of fd"); Toast.makeText(this, "in the", Toast.LENGTH_LONG).show(); startActivity(new Intent(Intent.ACTION_INSERT, getIntent() .getData())); break; default: throw new IllegalArgumentException("not matched"); } return true; } And i have NoteEditor activity clas to Insert a new note. And here is my Androidmanifesto.xml file. <uses-sdk android:minSdkVersion="14" /> <application android:icon="@drawable/ic_launcher" android:label="@string/app_name" > <activity android:label="@string/app_name" android:name=".NotesList" > <intent-filter > <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> <intent-filter> <action android:name="android.intent.action.VIEW" /> <action android:name="android.intent.action.EDIT" /> <action android:name="android.intent.action.PICK" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="vnd.android.cursor.dir/vnd.google.note" /> </intent-filter> <intent-filter > <action android:name="android.intent.action.GET_CONTENT" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="vnd.android.cursor.item/vnd.google.note" /> </intent-filter> </activity> <activity android:name="NoteEditor" > <intent-filter> <action android:name="NoteEditor"></action> <action android:name="android.intent.action.INSERT" /> <action android:name="android.intent.action.PASTE" /> <category android:name="android.intent.category.DEFAULT" /> <data android:mimeType="vnd.android.cursor.dir/vnd.google.note" /> </intent-filter> </activity> </application>

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• Delegate performance of Roslyn Sept 2012 CTP is impressive

  - by dotneteer

  I wanted to dynamically compile some delegates using Roslyn. I came across this article by Piotr Sowa. The article shows that the delegate compiled with Roslyn CTP was not very fast. Since the article was written using the Roslyn June 2012, I decided to give Sept 2012 CTP a try. There are significant changes in Roslyn Sept 2012 CTP in both C# syntax supported as well as API. I found Anoop Madhisidanan’s article that has an example of the new API. With that, I was able to put together a comparison. In my test, the Roslyn compiled delegate is as fast as C# (VS 2012) compiled delegate. See the source code below and give it a try. using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using Roslyn.Compilers; using Roslyn.Scripting.CSharp; using Roslyn.Scripting; namespace RoslynTest { class Program { public Func del; static void Main(string[] args) { Stopwatch stopWatch = new Stopwatch(); Program p = new Program(); p.SetupDel(); //Comment out this line and uncomment the next line to compare //p.SetupScript(); stopWatch.Start(); int result = DoWork(p.del); stopWatch.Stop(); Console.WriteLine(result); Console.WriteLine("Time elapsed {0}", stopWatch.ElapsedMilliseconds); Console.Read(); } private void SetupDel() { del = (s, i) => ++s; } private void SetupScript() { //Create the script engine //Script engine constructor parameters go changed var engine=new ScriptEngine(); //Let us use engine's Addreference for adding the required //assemblies new[] { typeof (Console).Assembly, typeof (Program).Assembly, typeof (IEnumerable<>).Assembly, typeof (IQueryable).Assembly }.ToList().ForEach(asm => engine.AddReference(asm)); new[] { "System", "System.Linq", "System.Collections", "System.Collections.Generic" }.ToList().ForEach(ns=>engine.ImportNamespace(ns)); //Now, you need to create a session using engine's CreateSession method, //which can be seeded with a host object var session = engine.CreateSession(); var submission = session.CompileSubmission>("new Func((s, i) => ++s)"); del = submission.Execute(); //- See more at: http://www.amazedsaint.com/2012/09/roslyn-september-ctp-2012-overview-api.html#sthash.1VutrWiW.dpuf } private static int DoWork(Func del) { int result = Enumerable.Range(1, 1000000).Aggregate(del); return result; } } }  Since Roslyn Sept 2012 CTP is already over a year old, I cannot wait to see a new version coming out.

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• What micro web-framework has the lowest overhead but includes templating

  - by Simon Martin

  I want to rewrite a simple small (10 page) website and besides a contact form it could be written in pure html. It is currently built with classic asp and Dreamweaver templates. The reason I'm not simply writing 10 html pages is that I want to keep the layout all in 1 place so would need either includes or a masterpage. I don't want to use Dreamweaver templates, or batch processing (like org-mode) because I want to be able to edit using notepad (or Visual Studio) because occasionally I might need to edit a file on the server (Go Daddy's IIS admin interface will let me edit text). I don't want to use ASP.NET MVC or WebForms (which I use in my day job) because I don't need all the overhead they bring with them when essentially I'm serving up 9 static files, 1 contact form and 1 list of clubs (that I aim to use jQuery to filter). The shared hosting package I have on Go Daddy seems to take a long time to spin up when serving aspx files. Currently the clubs page is driven from an MS SQL database that I try to keep up to date by manually checking the dojo locator on the main HQ pages and editing the entries myself, this is again way over the top. I aim to get a text file with the club details (probably in JSON or xml format) and use that as the source for the clubs page. There will need to be a bit of programming for this as the HQ site is unable to provide an extract / feed so something will have to scrape the site periodically to update my clubs persistence file. I'd like that to be automated - but I'm happy to have that triggered on a visit to the clubs page so I don't need to worry about scheduling a job. I would probably have a separate process that updates the persistence that has nothing to do with the rest of the site. Ideally I'd like to use Mercurial (or git) to publish, I know Bitbucket (and github) both serve static page sites so they wouldn't work in this scenario (dynamic pages and a contact form) but that's the model I'd like to use if there is such a thing. My requirements are: Simple templating system, 1 place to define header, footers, menu etc., that can be edited using just notepad. Very minimal / lightweight framework. I don't need a monster for 10 pages Must run either on IIS7 (shared Go Daddy Windows hosting) or other free host

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• Control Sysinternals Suite & NirSoft Utilities with a Single Interface

  - by Asian Angel

  Sysinternals and NirSoft both provide helpful utilities for your Windows system but may not be very convenient to access. Using the Windows System Control Center you can easily access everything through a single UI front end. Setup The first thing to do is set up three new folders in Program Files (or Program Files (x86) if you are using a 64bit system) with the following names (the first two need to exactly match what is shown here): Sysinternals Suite NirSoft Utilities (create this folder only if you have any of these apps downloaded) Windows System Control Center (or WSCC depending on your preferences) Unzip the contents of the Sysinternals Suite into its’ folder. Then unzip any individual NirSoft Utilities programs that you have downloaded into the NirSoft folder. All that is left to do is to unzip the WSCC software into its’ folder and create a shortcut. WSCC in Action When you start WSCC up for the first time you will see the following message with a brief explanation about the software. Next the options window will appear providing you an opportunity to look around and make any desired changes. WSCC can access utilities for both suites using a live connection if needed (utilities accessed live are not downloaded). Note: This occurs on the first run only. This is the main WSCC window…you can choose the utility that you want to use by sorting through an all items list or based on category. Note: WSCC may occasionally experience a problem downloading a particular utility if using the live service. We conducted a quick test by accessing two Sysinternals apps. First PsInfo… Followed by DiskView. Both opened quickly and were ready to go. There were no NirSoft Utilities installed on our test system in order to provide a live access example. Within moments WSCC accessed the CurrProcess utility and had it running on our system. Our recommendation is to download your favorite utilities from both suites (in order to always have easy access to them). Conclusion WSCC provides an easy way to access all of the apps in the Sysinternals Suite and NirSoft Utilities in one place. Note: A PortableApps version is also available. Links Download Windows System Control Center (WSCC) Download Windows Sysinternals Suite Download individual NirSoft Utilities programs Similar Articles Productive Geek Tips How To Get Detailed Information About Your PCAccess and Launch Windows Utilities the Easy WayWhat is svchost.exe And Why Is It Running?How to Clean Up Your Messy Windows Context MenuRemove NVIDIA Control Panel from Desktop Right-Click Menu TouchFreeze Alternative in AutoHotkey The Icy Undertow Desktop Windows Home Server – Backup to LAN The Clear & Clean Desktop Use This Bookmarklet to Easily Get Albums Use AutoHotkey to Assign a Hotkey to a Specific Window Latest Software Reviews Tinyhacker Random Tips CloudBerry Online Backup 1.5 for Windows Home Server Snagit 10 VMware Workstation 7 Acronis Online Backup Ultimate Boot CD can help when disaster strikes Windows Firewall with Advanced Security – How To Guides Sculptris 1.0, 3D Drawing app AceStock, a Tiny Desktop Quote Monitor Gmail Button Addon (Firefox) Hyperwords addon (Firefox)

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• How do I Integrate Production Database Hot Fixes into Shared Database Development model?

  - by TetonSig

  We are using SQL Source Control 3, SQL Compare, SQL Data Compare from RedGate, Mercurial repositories, TeamCity and a set of 4 environments including production. I am working on getting us to a dedicated environment per developer, but for at least the next 6 months we are stuck with a shared model. To summarize our current system, we have a DEV SQL server where developers first make changes/additions. They commit their changes through SQL Source Control to a local hgdev repository. When they execute an hg push to the main repository, TeamCity listens for that and then (among other things) pushes hgdev repository to hgrc. Another TeamCity process listens for that and does a pull from hgrc and deploys the latest to a QA SQL Server where regression and integration tests are run. When those are passed a push from hgrc to hgprod occurs. We do a compare of hgprod to our PREPROD SQL Server and generate deployment/rollback scripts for our production release. Separate from the above we have database Hot Fixes that will need to be applied in between releases. The process there is for our Operations team make changes on the PreProd database, and then after testing, to use SQL Source Control to commit their hot fix changes to hgprod from the PREPROD database, and then do a compare from hgprod to PRODUCTION, create deployment scripts and run them on PRODUCTION. If we were in a dedicated database per developer model, we could simply automatically push hgprod back to hgdev and merge in the hot fix change (through TeamCity monitoring for hgprod checkins) and then developers would pick it up and merge it to their local repository and database periodically. However, given that with a shared model the DEV database itself is the source of all changes, this won't work. Pushing hotfixes back to hgdev will show up in SQL Source Control as being different than DEV SQL Server and therefore we need to overwrite the reposistory with the "change" from the DEV SQL Server. My only workaround so far is to just have OPS assign a developer the hotfix ticket with a script attached and then we run their hotfixes against DEV ourselves to merge them back in. I'm not happy with that solution. Other than working faster to get to dedicated environment, are they other ways to keep this loop going automatically?

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