Implement mod_444 to handle HTTP status 444

Author: szepeviktor

mod_444.c

@@ -0,0 +1,44 @@
+#include "httpd.h"
+#include "http_config.h"
+#include "http_protocol.h"
+#include "http_core.h"
+#include "http_log.h"
+#include "http_request.h"
+#include "util_filter.h"
+#include "apr_buckets.h"
+
+static apr_status_t mod444_out_filter(ap_filter_t *f, apr_bucket_brigade *bb)
+{
+    request_rec *r = f->r;
+
+    if (r && r->status == 444) {
+        if (r->connection) {
+            r->connection->keepalive = AP_CONN_CLOSE;
+            r->connection->aborted   = 1;
+        }
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r,
+                      "mod_444: dropping connection on status 444");
+        ap_remove_output_filter(f);
+        return APR_ECONNABORTED;
+    }
+
+    return ap_pass_brigade(f->next, bb);
+}
+
+static void mod444_insert_filter(request_rec *r)
+{
+    ap_add_output_filter("MOD444_OUT", NULL, r, r->connection);
+}
+
+static void mod444_register_hooks(apr_pool_t *p)
+{
+    ap_register_output_filter("MOD444_OUT", mod444_out_filter, NULL, AP_FTYPE_PROTOCOL);
+    ap_hook_insert_filter(mod444_insert_filter, NULL, NULL, APR_HOOK_MIDDLE);
+}
+
+module AP_MODULE_DECLARE_DATA fourfour_module =
+{
+    STANDARD20_MODULE_STUFF,
+    NULL, NULL, NULL, NULL, NULL,
+    mod444_register_hooks
+};