https://bz.apache.org/bugzilla/show_bug.cgi?id=61217
Bug ID: 61217
Summary: Tomcat dose not send all buffer in case of response
was modify
Product: Tomcat 8
Version: 8.0.33
Hardware: Macintosh
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ----
IdentityOutputFilter not write all bytes in case the response was increased in
servlet filter
scenario:
1. Add filter servlet that changed the content of the response(increase the
size).
2. add controller that create response with header content-type
Example:
originalResponse message - 'Example of response to request-1'
modify response - 'Example of response to cmVxdWVzdC0x'
the size of original is 33
the size of the modify is 36
The response of the servlet will be only 33 chars from the modify response:
'Example of response to cmVxdWVzd'
The reason is that response initialize IdentityOutputFilter with content length
of the original.
the doWrite method get byte chunk but it remove the bytes that bigger than
in case response contains Content-Length header the IdentityOutputFilter will
try to write buffer.
if (result > remaining) {
// The chunk is longer than the number of bytes remaining
// in the body; changing the chunk length to the number
// of bytes remaining
chunk.setBytes(chunk.getBytes(), chunk.getStart(),
(int) remaining);
result = (int) remaining;
remaining = 0;
}
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