On Aug 4, 2007, at 7:58 AM, Ruediger Pluem wrote:



On 07/31/2007 08:52 PM, Ruediger Pluem wrote:

On 07/31/2007 04:54 PM,  wrote:
Author: gregames
Date: Tue Jul 31 07:54:46 2007
New Revision: 561352

URL: http://svn.apache.org/viewvc?view=rev&rev=561352
Log:
this appears to be a "mv" rather than a "swap", so we should be able to
simplify & shave off a couple of cycles.

Modified:
    httpd/httpd/trunk/modules/http/http_protocol.c

Modified: httpd/httpd/trunk/modules/http/http_protocol.c
URL: http://svn.apache.org/viewvc/httpd/httpd/trunk/modules/http/ http_protocol.c?view=diff&rev=561352&r1=561351&r2=561352 ==================================================================== ==========
--- httpd/httpd/trunk/modules/http/http_protocol.c (original)
+++ httpd/httpd/trunk/modules/http/http_protocol.c Tue Jul 31 07:54:46 2007
@@ -1138,7 +1138,6 @@
     }

     if (!r->assbackwards) {
-        apr_table_t *tmp = r->headers_out;

/* For all HTTP/1.x responses for which we generate the message, * we need to avoid inheriting the "normal status" header fields
@@ -1146,7 +1145,6 @@
* error or redirect, except for Location on external redirects.
          */
         r->headers_out = r->err_headers_out;
-        r->err_headers_out = tmp;
         apr_table_clear(r->err_headers_out);

if (ap_is_HTTP_REDIRECT(status) || (status == HTTP_CREATED)) {


IMHO this is wrong. Lets take the following example:

r->headers_out points to a table T1 containing the key value pairs ((A1,a1), (B1,b1)). r->err_headers_out points to a table T2 containing the key value pairs ((A2,a2), (B2,b2)).

After running thru the old code (until after the apr_table_clear) the the result is:

r->headers_out points to table T2 containing the key value pairs ((A2,a2), (B2,b2)).
r->err_headers_out points to table T1 which is empty.

Using the new code the result is

r->headers_out points to table T2.
r->err_headers_out points to table T2.

T2 is empty.

So r->headers_out and r->err_headers_out point to the *same* table and this table is *empty*.
So we loose *all* output headers for further processing.

Ping? Any comments?


Looks like a viable and reasonable (and required) reversal of
the patch is required...

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