Jetty

NumberFormatException when the url contains the string "%.."

Details

  • Type: Bug Bug
  • Status: Resolved Resolved
  • Priority: Minor Minor
  • Resolution: Not A Bug
  • Affects Version/s: 6.1.25, 6.1.26
  • Fix Version/s: None
  • Component/s: HTTP, Servlet
  • Environment:
    java version "1.6.0_26"
    Java(TM) SE Runtime Environment (build 1.6.0_26-b03)
    Java HotSpot(TM) Client VM (build 20.1-b02, mixed mode, sharing)

    Linux Ubuntu 11.04

    AMD Athon64 3200
  • Number of attachments :
    0

Description

Jetty 6.1.26 throws java.lang.NumberFormatException when the URL contains the string "%..", eg. http://localhost:8080/example%..

Copy of stacktrace
java.lang.NumberFormatException
at org.mortbay.util.TypeUtil.parseInt(TypeUtil.java:380)
at org.mortbay.jetty.HttpURI.getDecodedPath(HttpURI.java:473)
at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:526)
at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:928)
at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:549)
at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:212)
at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:410)
at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

Activity

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Jan Bartel added a comment -

Hi Juan,

% is a special character to indicate encoding. It is always followed by 2 hex digits. If you want to have the % character itself, it itself must be encoded. Here's the relevant section from RFC2396:

Because the percent "%" character always has the reserved purpose of
being the escape indicator, it must be escaped as "%25" in order to
be used as data within a URI. Implementers should be careful not to
escape or unescape the same string more than once, since unescaping
an already unescaped string might lead to misinterpreting a percent
data character as another escaped character, or vice versa in the
case of escaping an already escaped string.

If this does not address your issue, please reopen with an exact example url and explanation of where you think the problem is.

thanks
Jan

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Jan Bartel added a comment - Hi Juan, % is a special character to indicate encoding. It is always followed by 2 hex digits. If you want to have the % character itself, it itself must be encoded. Here's the relevant section from RFC2396: Because the percent "%" character always has the reserved purpose of being the escape indicator, it must be escaped as "%25" in order to be used as data within a URI. Implementers should be careful not to escape or unescape the same string more than once, since unescaping an already unescaped string might lead to misinterpreting a percent data character as another escaped character, or vice versa in the case of escaping an already escaped string. If this does not address your issue, please reopen with an exact example url and explanation of where you think the problem is. thanks Jan
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Jan Bartel added a comment -

Juan,

The error in parsing the uri happens before jetty can assign the request to a context (until we parse the uri, we don't know which context should handle it). Therefore, setting custom error pages on a context for these type of errors won't work.

If you want to be able to customize the errors that are returned by the container, I suggest you open a new issue as an enhancement request and link it to this one.

cheers
Jan

Show
Jan Bartel added a comment - Juan, The error in parsing the uri happens before jetty can assign the request to a context (until we parse the uri, we don't know which context should handle it). Therefore, setting custom error pages on a context for these type of errors won't work. If you want to be able to customize the errors that are returned by the container, I suggest you open a new issue as an enhancement request and link it to this one. cheers Jan

People

  • Assignee:
    Jan Bartel
    Reporter:
    Juan Ignacio
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Dates

  • Created:
    Updated:
    Resolved: