MEDIUM: http: Add a ruleset evaluated on all responses just before forwarding
This patch introduces the 'http-after-response' rules. These rules are evaluated
at the end of the response analysis, just before the data forwarding, on ALL
HTTP responses, the server ones but also all responses generated by
HAProxy. Thanks to this ruleset, it is now possible for instance to add some
headers to the responses generated by the stats applet. Following actions are
supported :
* allow
* add-header
* del-header
* replace-header
* replace-value
* set-header
* set-status
* set-var
* strict-mode
* unset-var
diff --git a/src/cfgparse-listen.c b/src/cfgparse-listen.c
index 3f16a25..70627c3 100644
--- a/src/cfgparse-listen.c
+++ b/src/cfgparse-listen.c
@@ -1413,6 +1413,36 @@
LIST_ADDQ(&curproxy->http_res_rules, &rule->list);
}
+ else if (!strcmp(args[0], "http-after-response")) {
+ struct act_rule *rule;
+
+ if (curproxy == &defproxy) {
+ ha_alert("parsing [%s:%d]: '%s' not allowed in 'defaults' section.\n", file, linenum, args[0]);
+ err_code |= ERR_ALERT | ERR_FATAL;
+ goto out;
+ }
+
+ if (!LIST_ISEMPTY(&curproxy->http_after_res_rules) &&
+ !LIST_PREV(&curproxy->http_after_res_rules, struct act_rule *, list)->cond &&
+ (LIST_PREV(&curproxy->http_after_res_rules, struct act_rule *, list)->flags & ACT_FLAG_FINAL)) {
+ ha_warning("parsing [%s:%d]: previous '%s' action is final and has no condition attached, further entries are NOOP.\n",
+ file, linenum, args[0]);
+ err_code |= ERR_WARN;
+ }
+
+ rule = parse_http_after_res_cond((const char **)args + 1, file, linenum, curproxy);
+
+ if (!rule) {
+ err_code |= ERR_ALERT | ERR_ABORT;
+ goto out;
+ }
+
+ err_code |= warnif_cond_conflicts(rule->cond,
+ (curproxy->cap & PR_CAP_BE) ? SMP_VAL_BE_HRS_HDR : SMP_VAL_FE_HRS_HDR,
+ file, linenum);
+
+ LIST_ADDQ(&curproxy->http_after_res_rules, &rule->list);
+ }
else if (!strcmp(args[0], "http-send-name-header")) { /* send server name in request header */
/* set the header name and length into the proxy structure */
if (warnifnotcap(curproxy, PR_CAP_BE, file, linenum, args[0], NULL))