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Abraxas ======= Abraxas is a very simple Feed Aggregator intended to showcase the SiLCC tagging api. One or more Feeds is aggregated, item titles are passed into the SiLCC tagging api to extract tags. Items are then displayed on a simple page with tags made clickable and cross referenced. Installation and Setup ====================== 1) Create a Python Virtual environment from which to run Abraxas Note that this step is optional but higly recommended. run virtualenv name_of_environment for example: $ virtualenv abraxas_env me@myserver:~/webapps$ virtualenv abraxas_env New python executable in abraxas_env/bin/python Installing setuptools............done. (If virtualenv is not installed then on Ubuntu the easiest way is to use easy_install to install it. If easy_install itself is not installed then first: $ sudo apt-get install python-setuptools then: $ sudo easy_install virtualenv) This will create a new virtual Python environment for you. Now activate your new environment: $ source abraxas_env/bin/activate This should change your prompt into something similar to: (abraxas_env)me@myserver:~/webapps$ Issuing a 'which python' command should confirm that the virtualenv is now activated: (abraxas_env)me@myserver:~/webapps$ which python /home/me/webapps/abraxas_env/bin/python 2) Now checkout a copy of the Abraxas source code: (abraxas_env)me@myserver:~/webapps$ git clone git://github.com/thakadu/Abraxas.git 3) Within the Abraxas directory (created as a result of step 2 above): (abraxas_env)me@myserver:~/webapps$ cd Abraxas (abraxas_env)me@myserver:~/webapps/abraxas$ python setup.py install This will install all of the dependancies into the Virtual Python enviroment created in step 1. 4) Create the database for Abraxas to use. If using MySQL: $ mysql -u root -p Once in the mysql environment: >>> create database abraxas default charset utf8; >>> grant all on abraxas.* to abraxas@localhost identified by 'password'; Now exit the MySQL enviroment by hitting Ctrl-D 5) Set the SQLAlchemy url in the prod.ini and/or the development.ini files. Fine the line that reads: sqlalchemy.url = mysql://abraxas:abraxas@tom:3306/abraxas and make sure it matches the database name, user name and password you used in step 5. 6) Initialize the database: We are going to use the supplied SQLAlchemy-migrate scripts to generate the initial tables and indexes. In order to do this, we first place the database under version control: $ python db_repository/manage.py version_control mysql://abraxas:password@localhost:3306/abraxas Make sure to use the correct url for the database you created in step 4. This will create the migrate_version table in your database and set the initial version to 0. Now create a custom manage.py script by running the following command: $ migrate manage manage.py --repository=db_repository --url=mysql://abraxas:password@localhost:3306/abraxas This will create a new manage.py file in the current directory. Verify that the manage.py file was created: $ ls -l manage.py -rw-r--r-- 1 nn nn 178 2010-05-30 12:49 manage.py Now 'upgrade' the database which will create all the initial tables and indexes. $ python manage.py upgrade You should see output similar to this: (abraxas_env)me@myserver:~/webapps/Abraxas$ python manage.py upgrade 0 -> 1... done 1 -> 2... done ... ... 7 -> 8... done 7) Load your initial feeds that you want to include in your Abraxas deployment. There is a loader script in the scripts directory called scripts/load_feeds.py It loads Feeds from a .csv file. Inside the data directory there are a couple of example .csv files. Create your own file from these, there are three fields, from left to right these are: a) Name of Feed b) Web Url (not the url of the feed but rather the website itself) c) Feed Url The data directory contains a few small example .csv files with some. The load_feeds.py script takes two parameters, the .ini file to use, which tells the script which database to load to and the .csv file which is where it loads the feeds from. By now your .ini file should already contain the correct database url you set in step 6. $ python scripts/load_feeds.py --ini=development.ini --filename=data/african_feeds.csv You can confirm that the feeds loaded by starting the mysql client and enterting the following query: $ mysql -u abraxas -p abraxas >>> select * from feed; If all went well you should see a list of the feeds from your .csv file. 8) Fetch the items from your feeds. As with the load_feeds script the fetch_feeds script also takes the .ini filename as a parameter. In all cases the default value is development.ini so you might want to make sure you have the correct database set in your development.ini file. $ python scripts/fetch_feeds.py --ini=development.ini This should download feeds from the feed urls supplied for each feed and store each entry in the database. 9) Tags the downloaded entries. Run the script scripts/tag_entries.py Again this takes the .ini file as a parameter: $ python scripts/tag_entries.py --ini=development.ini 10) Now start your server: Before starting your server there are a few settings in the .ini files that you should be aware of. Firstly the port that your Pylons application will listen on. This is set to 5003, change it if you want to. The host setting is set to 127.0.0.1, meaning only local connections will be allowed. It us higly recommended that you run your application behind Apache, nginx or any other popular full fledged web server, so in most cases you wont need to change the host setting. The logo file to use for your site is specified in the logo_file setting. This is defaulted to logo.png in the public/static directory. Change it to a logo for your site. To start your server: $ paster serve development.ini --daemon By default it will log to a file called paster.log. Watch this file for any errors. Now point your browser to http://127.0.0.1:5003 and you should be able to view your site. In order to keep your site up to date you need to periodically run the fetch_feeds.py and the tag_entries.py scripts. The best way to so this is to place them in your crontab.
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