PowerShell Scripting to Replicate RSS Feeds to MySQL

Write a simple PowerShell script to replicate RSS feeds to a MySQL database.

The CData Cmdlets for RSS offer live access to RSS feeds from within PowerShell. Using PowerShell scripts, you can easily automate regular tasks like data replication. This article will walk through using the CData Cmdlets for RSS and the CData Cmdlets for MySQL in PowerShell to replicate RSS feeds to a MySQL database.

After obtaining the needed connection properties, accessing RSS feeds in PowerShell and preparing for replication consists of four basic steps.

You can connect to RSS and Atom feeds, as well as feeds with custom extensions. To connect to a feed, set the URL property. You can also access secure feeds. A variety of authentication mechanisms are supported. See the help documentation for details.

Collecting RSS Feeds

  1. Install the module:

    Install-Module RSSCmdlets
  2. Connect to RSS:

    $rss = Connect-RSS -URL $URL
  3. Retrieve the data from a specific resource:

    $data = Select-RSS -Connection $rss -Table "Latest News"

    You can also use the Invoke-RSS cmdlet to execute pure SQL-92 statements:

    $data = Invoke-RSS -Connection $rss -Query 'SELECT * FROM Latest News WHERE Category = @Category' -Params @{'@Category'='US'}
  4. Save a list of the column names from the returned data.

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name

Inserting RSS Feeds into the MySQL Database

With the data and column names collected, you are ready to replicate the data into a MySQL database.

  1. Install the module:

    Install-Module MySQLCmdlets
  2. Connect to MySQL, using the server address and port of the MySQL server, valid user credentials, and a specific database with the table in which the data will be replicated:

    $mysql = Connect-MySQL -User $User -Password $Password -Database $Database -Server $Server -Port $Port
  3. Loop through the RSS feeds, store the values, and use the Add-MySQL cmdlet to insert the data into the MySQL database, one row at a time. In this example, the table will need to have the same name as the RSS resource (Latest News) and to exist in the database.

    $data | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Latest News" -Columns $columns -Values $values }

You have now replicated your RSS feeds to a MySQL database. This gives you freedom to work with RSS feeds in the same way that you work with other MySQL tables, whether that is performing analytics, building reports, or other business functions.

Notes

  • Once you have connected to RSS and MySQL in PowerShell, you can pipe command results to perform the replication in a single line:

    Select-RSS -Connection $rss -Table "Latest News" | % { $row = $_ $values = @() $columns | % { $col = $_ $values += $row.$($col) } Add-MySQL -Connection $mysql -Table "Latest News" -Columns $columns -Values $values }
  • If you wish to replicate the RSS feeds to another database using another PowerShell module, you will want to exclude the Columns, Connection, and Table columns from the data returned by the Select-RSS cmdlet since those columns are used to help pipe data from one CData cmdlet to another:

    $columns = ($data | Get-Member -MemberType NoteProperty | Select-Object -Property Name).Name | ? {$_ -NotIn @('Columns','Connection','Table')}