Language permanent redirect in I18nServlet is ignoring application server context

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, Master
• Fix Version/s: 7.0.0 DXP FP89, 7.0.10.13 DXP SP13, 7.0.X, 7.1.10 DXP FP16, 7.1.X, 7.2.10 DXP FP3, 7.2.X, 7.2.1 CE GA2, 7.3.10 DXP GA1, Master
• Component/s: ~[Archived] WCM
• Labels:
  • ee-ts
  • liferay-dxp-70-sp13
  • liferay-fixpack-de-89-7010
  • liferay-fixpack-dxp-16-7110
  • liferay-fixpack-dxp-3-7210
• Branch Version/s:
  7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/80160

This bug is caused by LPS-78738

In case you open a URL with a underscore-languageId (es_ES), a permanent redirect is returned with a dash-languageId (es-ES)

But the redirect generated in I18nServlet is ignoring non-empty contexts.

Steps to reproduce

1. Configure Liferay with a non empty context, for example: myContext
2. Opening URL: http://localhost:8080/myContext/es_ES
   • Expected behavior: Liferay returns a permanent redirect to http://localhost:8080/myContext/es-ES
   • Wrong behavior: Liferay returns a permanent redirect to http://localhost:8080/es-ES , without context