Introduce ap_send_interim_response function and API, for interim

(HTTP 1xx) responses sent by an application or backend.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@582630 13f79535-47bb-0310-9956-ffa450edef68

diff --git a/include/http_protocol.h b/include/http_protocol.h
index e8355e17a675c0593ad5183e5f4229a4269fd79c..4cf351e13d1c88abfc68c60e8919b47be8d28a3a 100644 (file)
--- a/include/http_protocol.h
+++ b/include/http_protocol.h
@@ -664,6 +664,12 @@ AP_DECLARE(void) ap_set_sub_req_protocol(request_rec *rnew, const request_rec *r
  * @param sub_r Subrequest that is now compete
  */
 AP_DECLARE(void) ap_finalize_sub_req_protocol(request_rec *sub_r);
+
+/**
+ * Send an interim (HTTP 1xx) response immediately.
+ * @param r The request
+ */
+AP_DECLARE(void) ap_send_interim_response(request_rec *r);
                                                                                 
 #ifdef __cplusplus
 }

diff --git a/server/protocol.c b/server/protocol.c
index b31dbd9106fa3970cc06a16d4cf1bc8ba9d68262..6a878ca27da515027cd689ae8458835884490553 100644 (file)
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -1631,6 +1631,41 @@ AP_DECLARE(void) ap_set_last_modified(request_rec *r)
     }
 }
 
+typedef struct hdr_ptr {
+    ap_filter_t *f;
+    apr_bucket_brigade *bb;
+} hdr_ptr;
+static int send_header(void *data, const char *key, const char *val)
+{
+    ap_fputstrs(((hdr_ptr*)data)->f, ((hdr_ptr*)data)->bb,
+                key, ": ", val, CRLF, NULL);
+    return 1;
+}
+AP_DECLARE(void) ap_send_interim_response(request_rec *r)
+{
+    hdr_ptr x;
+
+    if (r->proto_num < 1001) {
+        /* don't send interim response to HTTP/1.0 Client */
+        return;
+    }
+    if (!ap_is_HTTP_INFO(r->status)) {
+        ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, NULL,
+                      "Status is %d - not sending interim response", r->status);
+        return;
+    }
+
+    x.f = r->connection->output_filters;
+    x.bb = apr_brigade_create(r->pool, r->connection->bucket_alloc);
+    ap_fputstrs(x.f, x.bb, AP_SERVER_PROTOCOL, " ", r->status_line, CRLF, NULL);
+    apr_table_do(send_header, &x, r->headers_out, NULL);
+    ap_fputs(x.f, x.bb, CRLF);
+    ap_fflush(x.f, x.bb);
+    apr_brigade_destroy(x.bb);
+    apr_table_clear(r->headers_out);
+}
+
+
 AP_IMPLEMENT_HOOK_RUN_ALL(int,post_read_request,
                           (request_rec *r), (r), OK, DECLINED)
 AP_IMPLEMENT_HOOK_RUN_ALL(int,log_transaction,