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diff --git a/modules/http2/h2_from_h1.h b/modules/http2/h2_from_h1.h
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+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __mod_h2__h2_from_h1__
+#define __mod_h2__h2_from_h1__
+
+/**
+ * h2_from_h1 parses a HTTP/1.1 response into
+ * - response status
+ * - a list of header values
+ * - a series of bytes that represent the response body alone, without
+ *   any meta data, such as inserted by chunked transfer encoding.
+ *
+ * All data is allocated from the stream memory pool. 
+ *
+ * Again, see comments in h2_request: ideally we would take the headers
+ * and status from the httpd structures instead of parsing them here, but
+ * we need to have all handlers and filters involved in request/response
+ * processing, so this seems to be the way for now.
+ */
+struct h2_headers;
+struct h2_task;
+
+apr_status_t h2_from_h1_parse_response(struct h2_task *task, ap_filter_t *f, 
+                                       apr_bucket_brigade *bb);
+
+apr_status_t h2_filter_headers_out(ap_filter_t *f, apr_bucket_brigade *bb);
+
+apr_status_t h2_filter_request_in(ap_filter_t* f,
+                                  apr_bucket_brigade* brigade,
+                                  ap_input_mode_t mode,
+                                  apr_read_type_e block,
+                                  apr_off_t readbytes);
+
+apr_status_t h2_filter_trailers_out(ap_filter_t *f, apr_bucket_brigade *bb);
+
+#endif /* defined(__mod_h2__h2_from_h1__) */