https://bz.apache.org/bugzilla/show_bug.cgi?id=64166
Bug ID: 64166
Summary: RequestDumperFilter duplicates headers
Product: Tomcat 9
Version: 9.0.x
Hardware: PC
Status: NEW
Severity: minor
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: gpeter...@bravurasolutions.com
Target Milestone: -----
Created attachment 37031
--> https://bz.apache.org/bugzilla/attachment.cgi?id=37031&action=edit
Patch to correct logging of response headers
The RequestDumper attempts to log the outgoing headers by first obtaining the
header names, then for each header name it outputs the values for that header.
The problem is that the header names are not unique, so if there are two
cookies, there are two Set-Cookie headers. The dumper uses the getHeaders
method, which returns all values for the named header. Since it sees the
Set-Cookie header twice, calling getHeaders returns both values, so it logs
both values for each occurrence of the Set-Cookie header, so we see each cookie
twice in the request log.
Attached patch ensures headers are unique before logging.
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