https://issues.apache.org/bugzilla/show_bug.cgi?id=51881
Bug #: 51881
Summary: Server incorrectly parses incoming HTTP requests and
loses them
Product: Tomcat 7
Version: 7.0.21
Platform: PC
Status: NEW
Severity: critical
Priority: P2
Component: Catalina
AssignedTo: dev@tomcat.apache.org
ReportedBy: stfigh...@mail.ru
Classification: Unclassified
We are developing Comet-based web application with native Tomcat Comet support
via Atmosphere framework. We use HTTP streaming for transferring data from our
servlet to the client. In our scenario, the user connects to the server with
XMLHTTPRequest sending GET. In response, we suspend his connection and then,
when needed, send data back to him. When the user opens another browser tab and
connects to our web application, our web application should close the
connection in the first (previously opened) tab and then suspend and use
connection from the second. So, my serlvet detect that another GET is incoming
in the same session, finds previous connection and closes it (internally using
CometEvent.close()). This works as intended. However, the next HTTP request to
the web server is not correctly handled, and in my servlet I receive the
strange HttpServletRequest with previous GET query string and duplicate request
headers from initial GET and the following request. I traced through the Tomcat
code, and noticed, that in org.apache.coyote.http11.Http11Processor.process()
request field is usually empty (contains no HTTP method, request headers, etc.)
However, after Comet closing this object is not empty and contain previoud HTTP
request. Later the request headers are parsed and appended to the fields
existed in previous request object. After that, this invalid object is passed
to my Servlet.
I suppose, that clearing request object when closing comet event and all
assosiated data in Http11NioProcessor.actionInternal() can solve this issue.
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