Posterous theme by Cory Watilo

Filed under: Web Development

Django: CSRF verification failed. Request aborted.

I just recently upgraded to Django v1.2.3. I'm really diggin' this new version so far. The framework has significantly matured now. There were no major problems with porting my existing sites except when I went into the CMS, would make an edit and then tried to save any changes to the db and I would get the following error message: "CSRF verification failed. Request aborted." I had NEVER seen that error before and no idea what to do. As with most things related to Django, (and really almost all open source projects), there was no documentation on this error. Not in the release notes. Not in the online documentation. Nowhere! I was foreseeing a long night ahead of me trying to get to the bottom of this error. So after some digging around I came across this blog entry from Jordan Messina that solved it for me. I sharing the solution here. Simply edit your settings.py file and add the following lines to the MIDDLEWARE_CLASSES section: 'django.middleware.csrf.CsrfViewMiddleware', 'django.middleware.csrf.CsrfResponseMiddleware', So it should now look like this: MIDDLEWARE_CLASSES = ( 'django.middleware.common.CommonMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.middleware.csrf.CsrfResponseMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', ) Kill the server. (If it's running.) Run "syncdb". Run the server and voila... when you save all should be good with the world. This saved me hours of my life. (Your mileage may vary.)

Configuring MySQL-Python on OSX Leopard

At WebSight Design we try to remain technology-agnostic. (The right tool or language for the job.) Having said that, we are primarily a PHP shop. However, with the launch of the Google App Engine, we've been looking seriously at Python. In recent years, I have become a big fan of development frameworks so to aide me in learning the ways of the snake, I have been using the Django framework. Getting it all setup wasn't difficult. The Django installation is very easy. I started to get errors when I was trying to get my models working when I ran manage.py syncdb. Come to find out that I needed the MySQL-Python library installed to work correctly on my OSX Leopard machine. Most everything that I illustrate below is to be executed from the command-line. So if you are not familiar with working in the Terminal app, this post is gonna suck for you. So here is what I did to get it working: First, download MySQL for Python http://sourceforge.net/projects/mysql-python for me it was MySQL-python-1.2.2.tar Unpack it: tar -xzf MySQL-python-1.2.2.tar Change to the directory that is created: cd MySQL-python-1.2.2 Next, locate your "mysql_conf" file. locate mysql_conf Copy the location of this file so you can use it in the next few steps. Next, you need to edit the "site.cfg" file and add the path to your "mysql_conf" file. mysql_config = "YOUR_PATH_GOES_HERE" Also, (very important), change the line that reads: threadsafe = True TO threadsafe = False Save and exit the file. Now, compile and install the library: python setup.py build sudo python setup.py install NOTE: You may need to run "python setup.py clean" if you previously tried to build and install the library. Next is the *really* important part. After I kept getting errors trying to run the Python server I found the missing piece on the ProjectMouse.org site. The key is, you need to create a symbolic link in the location that Python is expecting to find MySQL. This should be a link to the MySQL library that your computer is setup to use. See here: sudo mkdir /usr/local/mysql/lib/mysql/ sudo ln -s /usr/local/mysql-5.0.41-osx10.4-i686/lib/libmysqlclient_r.15.dylib /usr/local/mysql/lib/mysql/libmysqlclient_r.15.dylib NOTE: "mysql-5.0.41-osx10.4-i686" is where MySQL is installed on my machine. Change this to the location specific to your computer. Finally, import MySQLdb into Python and test your configuration: python import MySQLdb NOTE: You should not see any errors or warnings. Hit "Ctrl+d" to exit the interepter. Now go back and run manage.py syncdb again and you should not get any errors.

Compile / Configure Subversion w/SSL Enabled

My company: WebSight Design, uses Subversion for source and version control for all of our web development projects. We also use the amazing hosted Subversion service: Springloops. (If you ever need a Subversion deployment tool, Springloops is it!) Springloops repositories are *only* accessible via HTTPS. In order to gain access to a repository from the command line, I had to re-configure Subversion on our servers to enable access to ssl urls. Seems simple enough and actually it is. However, as with all things Linux, the devil is in the details. I spent hours-upon-hours trying to get it to work. It simply comes down to the sequence of steps you take. What I've done here is list out all of the steps done to get it working to save you from the same pain I went through. So, I am assuming that you are trying to access a Subversion repository via an https url and you are getting the message "ssl not supported" or something similar to this. I know, it sucks and it's pretty frustrating. I promise you however, if you do *exactly* what I spell out below, in the sequence I list... you will be up and working in about 15-20mins. The only other assumption here is that you are using Ubuntu or some other Debian-based Linux distro that supports the APT package manager. It's important to know that Subversion uses a module called Neon to provide ssl connectivity. The key here is to use the version of Neon for your specific release of Subversion. This is key to everything else that follows. Don't just grab the latest versions of Subversion and Neon and assume they will work correctly together. So with that... let's get to work. First, make sure the following packages are installed on your server: GCC sudo apt-get install build-essential Expat sudo apt-get install expat Libxml-dev sudo apt-get install libxml2-dev Next, download latest Subversion files: wget http://subversion.tigris.org/downloads/subversion-1.4.X.tar.bz2 wget http://subversion.tigris.org/downloads/subversion-deps-1.4.X.tar.bz2 NOTE: "X" above is a placeholder for your version no. Untar em' in this order: tar xjvf subversion-1.4.X.tar.bz2 tar xjvf subversion-deps-1.4.X.tar.bz2 Once you have extracted the files, open the file "subversion-1.4.X/INSTALL". Locate the section on Neon. It will state which version you need to download and compile with this version of Subversion. Make sure you are *not* in the Subversion directory you just created. Then go ahead and download Neon: wget http://www.webdav.org/neon/neon-0.2X.0.tar.gz NOTE: The "X" above is placeholder for the version of Neon you need. Next, extract the archive: tar zxvf neon-1.X.X.tar.gz cd neon-1.X.X Now is where the fun begins. You need to compile and install Neon. Do the following from *within* the Neon directory you created: ./configure --with-ssl make sudo make install It's important to note that Neon gets installed to /usr/local by default. You need to note that as you will now need it when compiling and installing Subversion. Change back to the Subversion folder: cd ../subversion-1.4.X Compile and install Subversion: ./configure --enable-ssl --with-neon=/usr/local/ make sudo make install Now, realize that the Subversion compilation and installation process takes a long time to complete. So just be patient. You can ignore any warning messages that scroll by. You only need to be concerned with error messages or if the installation stops for any reason. Once compilation and installation are complete you need to confirm that you are running the version of Subversion you just tried to install: svn --version --quiet If you get *anything* other than the version number you thought you installed, something went horribly wrong. Go back to the very beginning of this and try again. Most time folks get errors it is because that don't have the prerequisite tools and utilities installed. If you see the version you wanted... you're all good!

Getting Ruby-on-Rails Up On Ubuntu / Apache

GCC: sudo apt-get install build-essential Ruby & Friends: sudo apt-get install ruby1.8-dev ruby1.8 ri1.8 rdoc1.8 irb1.8 libreadline-ruby1.8 libruby1.8 *** Create Symbolic Links *** sudo ln -s /usr/bin/ruby1.8 /usr/local/bin/rubysudo ln -s /usr/bin/ri1.8 /usr/local/bin/risudo ln -s /usr/bin/rdoc1.8 /usr/local/bin/rdocsudo ln -s /usr/bin/irb1.8 /usr/local/bin/irbZlib:wget http://www.zlib.net/zlib-1.2.3.tar.gztar -xvf zlib-1.2.3.tar.gz./configure make sudo make install Install Open SSL: sudo apt-get install openssl libssl-dev Apache 2.2: wget http://apache.rmplc.co.uk/httpd/httpd-2.2.4.tar.gz tar -xvf httpd-2.2.4.tar.gz ./configure --prefix=/usr/local/apache --enable-proxy --enable-proxy-http --enable-proxy-balancer --enable-dav --enable-rewrite --enable-so --enable-http --enable-ssl --enable-expires --enable-headers --enable-mods=deflate_module --with-php --with-mysql --with-susexec --disable-info --without-berkeley-db --enable-dav=shared --enable-dav-lock=shared --with-included-apr make sudo make install MySQL & Postfix Postfix: sudo apt-get install postfix note: select "Internet Site" option when prompted MySQL: sudo apt-get install mysql-server mysql-common mysql-client libmysqlclient15-dev libmysqlclient15off sudo apt-get install libmysql-ruby1.8 /* MySQL Ruby bindings */ sudo apt-get install libmysqlclient15-dev libmysql-ruby1.8sudo gem install mysql note: Select the most recent non-win32 version FastCGI: sudo apt-get install libfcgi libfcgi-dev libfcgi-ruby1.8 sudo gem install fcgi Lighttpd: apt-get install lighttpd RubyGems: wget http://rubyforge.iasi.roedu.net/files/rubygems/rubygems-0.9.0.tgz tar xvzf rubygems* cd rubygems* sudo ruby setup.rb Rails: sudo gem install rails --include-dependencies Mongrel, Subversion and Capistrano Mongrel: sudo gem install daemons gem_plugin mongrel mongrel_cluster --include-dependencies Subversion: sudo apt-get install libxml2-dev wget http://subversion.tigris.org/downloads/subversion-1.4.5.tar.gz tar xfz subversion-1.4.5.tar.gz cd subversion-1.4.5 ./configure --with-apr=/usr/local/apache/bin/apr-1-config --with-apr-util=/usr/local/apache/bin/apu-1-config --with-apxs=/usr/local/apache/bin/apxs --without-berkeley-db --with-ssl Capistrano sudo gem install deprec --include-dependencies Redcloth sudo gem install redcloth