Auto Look and Feel fails with incorrect Base URL

When an incorrectly defined Base URL is set, the "Auto Look and Feel" option results in browser errror.

Common scenario could be SSL without the proper certs, etc. Especially after a migration/upgrade.

• Browser:

  Error 330 (net::ERR_CONTENT_DECODING_FAILED): Unknown error.
  

• The following would appear in logs

  2013-05-30 09:42:10,432 http-bio-127.0.0.1-18000-exec-16 ERROR      [500ErrorPage.jsp] Exception caught in 500 page javax.imageio.IIOException: Can't get input stream from URL!
  java.lang.RuntimeException: javax.imageio.IIOException: Can't get input stream from URL!
  	at com.atlassian.jira.lookandfeel.AutoLookAndFeelManager.getLogoInfo(AutoLookAndFeelManager.java:245)
  	at com.atlassian.jira.lookandfeel.AutoLookAndFeelManager.generateFromLogo(AutoLookAndFeelManager.java:53)
  	at com.atlassian.jira.lookandfeel.EditLookAndFeel.doAutoUpdateColors(EditLookAndFeel.java:368)
  	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
  	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
  	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
  	at java.lang.reflect.Method.invoke(Unknown Source)
  	at webwork.util.InjectionUtils$DefaultInjectionImpl.invoke(InjectionUtils.java:70)
  	at webwork.util.InjectionUtils.invoke(InjectionUtils.java:56)
  ...
  
  Caused by: javax.imageio.IIOException: Can't get input stream from URL!
  	at javax.imageio.ImageIO.read(Unknown Source)
  	at com.atlassian.jira.lookandfeel.AutoLookAndFeelManager.getLogoInfo(AutoLookAndFeelManager.java:240)
  	... 193 more
  Caused by: javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  	at sun.security.ssl.Alerts.getSSLException(Unknown Source)
  	at sun.security.ssl.SSLSocketImpl.fatal(Unknown Source)
  	at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
  	at sun.security.ssl.Handshaker.fatalSE(Unknown Source)
  	at sun.security.ssl.ClientHandshaker.serverCertificate(Unknown Source)
  	at sun.security.ssl.ClientHandshaker.processMessage(Unknown Source)
  	at sun.security.ssl.Handshaker.processLoop(Unknown Source)
  	at sun.security.ssl.Handshaker.process_record(Unknown Source)
  	at sun.security.ssl.SSLSocketImpl.readRecord(Unknown Source)
  	at sun.security.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
  	at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
  	at sun.security.ssl.SSLSocketImpl.startHandshake(Unknown Source)
  	at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
  	at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
  	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
  	at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
  	at java.net.URL.openStream(Unknown Source)
  	... 195 more
  Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  	at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
  	at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
  	at sun.security.validator.Validator.validate(Unknown Source)
  	at sun.security.ssl.X509TrustManagerImpl.validate(Unknown Source)
  	at sun.security.ssl.X509TrustManagerImpl.checkTrusted(Unknown Source)
  	at sun.security.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
  	... 208 more
  Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
  	at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
  	at java.security.cert.CertPathBuilder.build(Unknown Source)
  	... 214 more
  

• In this case, JIRA needed a SSL cert installed into Java

This may also occur if the URL is simply badly defined, like http://wrongurl:8001

Quick reproduce:

• Fresh JIRA install, http://localhost:8080
• Edit Base URL to: https://localhost:8080
• Navigate to Look and Feel
• Upload a logo
• Click the "To apply a color scheme that matches your logo, click here." option
• Browser/logs error

Expectation: re-color works or some message about the base URL being ill-defined.