From: Ryan Bloom <rbb@apache.org>
Date: Sat, 21 Oct 2000 17:22:28 +0000 (+0000)
Subject: Add a way to remove output filters.  This is used by http_header_filter to
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=972b5a5e156822fda64a6b4d96c6a9e560c1b65c;p=apache

Add a way to remove output filters.  This is used by http_header_filter to
remove itself once it has actually sent the headers.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@86690 13f79535-47bb-0310-9956-ffa450edef68
---

diff --git a/include/util_filter.h b/include/util_filter.h
index edcc4eb636..7c6489559d 100644
--- a/include/util_filter.h
+++ b/include/util_filter.h
@@ -360,6 +360,8 @@ AP_DECLARE(void) ap_add_input_filter(const char *name, void *ctx, request_rec *r
 AP_DECLARE(void) ap_add_output_filter(const char *name, void *ctx, 
                                       request_rec *r, conn_rec *c);
 
+AP_DECLARE(void) ap_remove_output_filter(ap_filter_t *f);
+
 /* The next two filters are for abstraction purposes only.  They could be
  * done away with, but that would require that we break modules if we ever
  * want to change our filter registration method.  The basic idea, is that
diff --git a/modules/http/http_protocol.c b/modules/http/http_protocol.c
index 0a1f0ee770..e2dfc84bd7 100644
--- a/modules/http/http_protocol.c
+++ b/modules/http/http_protocol.c
@@ -2228,11 +2228,6 @@ AP_CORE_DECLARE(int) ap_http_header_filter(ap_filter_t *f, ap_bucket_brigade *b)
     char *date = NULL;
     request_rec *r = f->r;
 
-    if ((int)f->ctx != 0) {
-        return ap_pass_brigade(f->next, b);
-    }
-    (int)f->ctx++;
-
     if (r->assbackwards) {
         if (!r->main)
             ap_bsetopt(r->connection->client, BO_BYTECT, &zero);
@@ -2325,6 +2320,7 @@ AP_CORE_DECLARE(int) ap_http_header_filter(ap_filter_t *f, ap_bucket_brigade *b)
     if (r->chunked) {
         ap_bsetflag(r->connection->client, B_CHUNK, 1);
     }
+    ap_remove_output_filter(f);
     return ap_pass_brigade(f->next, b);
 }
 
diff --git a/server/util_filter.c b/server/util_filter.c
index 85780a04f6..dcd7c06a29 100644
--- a/server/util_filter.c
+++ b/server/util_filter.c
@@ -155,6 +155,31 @@ AP_DECLARE(void) ap_add_input_filter(const char *name, void *ctx,
     }
 }
 
+AP_DECLARE(void) ap_remove_output_filter(ap_filter_t *f)
+{
+    ap_filter_t *curr;
+
+    curr = f->r ? f->r->output_filters : f->c->output_filters;
+
+    if (curr == f) {
+        if (f->r) {
+            f->r->output_filters = f->r->output_filters->next;
+        }
+        else {
+            f->c->output_filters = f->c->output_filters->next;
+        }
+        return;
+    }
+
+    while (curr->next != f) {
+        if (curr == NULL) {
+            return;
+        }
+        curr = curr->next;
+    }
+    curr->next = f->next ? f->next : NULL;
+}
+
 AP_DECLARE(void) ap_add_output_filter(const char *name, void *ctx, 
                                       request_rec *r, conn_rec *c)
 {