[undertow-dev] [1.4.23.Final] Invalid character | in request-target

I just had a user who updated to the latest version of my Undertow-powered server report an error when his query string contained unencoded pipe characters. (error at the bottom) This didn't happen in older versions but appears to be a valid check. In this case, my user has no control over the URL that's being sent to his site as it comes from a Microsoft Office365 app that opens a popup window to one of his URLs for authentication. It looks like this: https://127.0.0.1:1443/index.cfm/login:main/index?_host_Info=outlook|web|... I have a feeling this is "working as designed" but is there a way to relax the validation here as he has no control over this URL and it is a hard stop for him? [DEBUG] io.undertow.request.io: UT005014: Failed to parse request io.undertow.util.BadRequestException: UT000165: Invalid character | in request-target at io.undertow.server.protocol.http.HttpRequestParser.handleQueryParameters(HttpRequestParser.java:523) at io.undertow.server.protocol.http.HttpRequestParser.beginQueryParameters(HttpRequestParser.java:486) at io.undertow.server.protocol.http.HttpRequestParser.handlePath(HttpRequestParser.java:410) at io.undertow.server.protocol.http.HttpRequestParser.handle(HttpRequestParser.java:248) at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:187) at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:151) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:92) at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:51) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:291) at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:286) at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92) at org.xnio.nio.QueuedNioTcpServer$1.run(QueuedNioTcpServer.java:129) at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:582) at org.xnio.nio.WorkerThread.run(WorkerThread.java:466) Thanks! ~Brad *Developer Advocate* *Ortus Solutions, Corp * E-mail: brad(a)coldbox.org ColdBox Platform: http://www.coldbox.org Blog: http://www.codersrevolution.com