The following reply was made to PR mod_proxy/5668; it has been noted by GNATS.
From: Kim Bisgaard <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Subject: Re: mod_proxy/5668: Patch for streaming servers and long running
cgi-scripts
Date: Tue, 1 Feb 2000 13:10:57 +0100
Retransmit because Netscape send last message as uuencode/base64.
Clarification:
After this patch has been applied, one only has to make sure that the long
running scripts outputs "Pragma: nocache" in the header (what they should have
done all the time, anyway), and then they will be passed through the proxy
un-buffered and un-cached. No performance losses on other urls.
The total/correct patch for this problem is:
*** /tmp/proxy_http.c.org Mon Jan 31 16:37:32 2000
--- /tmp/proxy_http.c Mon Jan 31 16:37:32 2000
***************
*** 187,193 ****
int destport = 0;
char *destportstr = NULL;
const char *urlptr = NULL;
! const char *datestr;
struct tbl_do_args tdo;
void *sconf = r->server->module_config;
--- 187,193 ----
int destport = 0;
char *destportstr = NULL;
const char *urlptr = NULL;
! const char *datestr, *pragma;
struct tbl_do_args tdo;
void *sconf = r->server->module_config;
***************
*** 468,473 ****
--- 468,483 ----
ap_table_set(resp_hdrs, "Location", proxy_location_reverse_map(r, datestr));
if ((datestr = ap_table_get(resp_hdrs, "URI")) != NULL)
ap_table_set(resp_hdrs, "URI", proxy_location_reverse_map(r, datestr));
+
+ /* If "Pragma: no-cache" or "Cache-Control: no-cache"
+ * set nocache and make reply un-buffered to enshure timely delivery */
+ if (((pragma = ap_table_get(resp_hdrs, "Pragma")) != NULL &&
+ ap_proxy_liststr(pragma, "no-cache")) ||
+ ((pragma = ap_table_get(resp_hdrs, "Cache-Control")) != NULL &&
+ ap_proxy_liststr(pragma, "no-cache"))) {
+ nocache = 1;
+ r->connection->client->flags &= ~B_WR;
+ }
/* check if NoCache directive on this host */
for (i = 0; i < conf->nocaches->nelts; i++) {
--
Kim Bisgaard
Oersted Science Data Center
Solar-Terrestrial Physics Division Phone: +45 3915 7495 (direct)
Danish Meteorological Institute Fax: +45 3915 7460 (division)
http://www.dmi.dk/solar-terrestrial/ -- Division homepage
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