Month: September 2014

MySQL useConfigs=maxPerformance

I noticed this while updating to SonarQube 4.5. The documentation and references to this parameter lead me to believe that it is a useful shortcut to optimizing server resources.

In /opt/sonar/sonar.properties


sonar.jdbc.url=jdbc:mysql://localhost:3306/sonar?useUnicode=true&characterEncoding=utf8&rewriteBatchedStatements=true&useConfigs=maxPerformance

NOTE: In some instances you may need to escape the ampersands!

I’ll change this on a few projects and watch for any issues changes.

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Java temporary file directory path

I’ve recently resurrected some old java code that I’d written back when I primarily used Windows instead of Ubuntu for development. In some of that legacy code, the temporary file paths were hardcoded, to make things more modern and portable, The following line is recommended to get the Operating System values regardless of where it is installed and ran. The file separator “slash” can also be determined in this manner.


private static final String TMPDIR = System.getProperty("java.io.tmpdir") + java.io.File.separatorChar;

clientaccesspolicy.xml

Similar to ‘crossdomain.xml’, Silverlight has some security features, this too is often noticeable by large number of HTTP 404 errors for a file named ‘clientaccesspolicy.xml’ in my webserver logs.

The most simple solution to the 404’s that restricts Silverlight is to add an empty file at the root of your websites.

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Preventing Pinterest “pinning” of your content

While many people are happy when images from their websites get “pinned” on Pinterest, there are many times that you might not be so pleased. You may have a need to prevent images from being shared for copyright or similar reasons, or simply not want the extra website traffic.

Thankfully, you can stop this with the addition of a simple HTML META tag. Also, if you already use CloudFlare, they can add it for you at runtime!


<meta name="pinterest" content="nopin" />

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Renaming PHPSESSID

Like in Java, securing/renaming the PHP Session ID is simply a configuration item, generally this value is set as a cookie, but occasionally gets used in cases of URL Rewriting.

On Ubuntu your settings can be changed as follows, Windows will use the same settings in the appropriate file:

  1. sudo vi /etc/php5/apache2/php.ini
  2. Modify the following values as needed:

    session.name = "PHPSESSID"
    session.cookie_httponly = 1

REFERENCES