diff -r 21274e5950af -r a1f4cb076d2f src/server/plugins/postgresql/webdav.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/server/plugins/postgresql/webdav.h	Sat Sep 24 16:26:10 2022 +0200
@@ -0,0 +1,134 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2022 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef WS_PG_WEBDAV_H
+#define WS_PG_WEBDAV_H
+
+#include "../../public/nsapi.h"
+#include "../../public/webdav.h"
+
+#include "config.h"
+
+#include <libpq-fe.h>
+#include <ucx/buffer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+    
+#define PG_MAX_PATH_LEN 0x8000
+    
+typedef struct PgWebdavBackend {
+    ResourceData *pg_resource;
+    PGconn *connection;
+    PgRepository *repository;
+    char root_resource_id_str[32];
+} PgWebdavBackend;
+
+typedef struct PgPropfindExtCol {
+    /*
+     * property extension config
+     */
+    PgPropertyStoreExt *ext;
+    /*
+     * Result field number
+     */
+    int field_num;
+} PgPropfindExtCol;
+    
+typedef struct PgPropfind {
+    const char *path;
+    int64_t resource_id;
+    WebdavVFSProperties vfsproperties;
+    PGresult *result;
+    PgPropfindExtCol *ext;
+    size_t numext;
+    int nrows;
+} PgPropfind;
+
+typedef struct {
+    PgPropertyStoreExt *column;
+    WebdavProperty *property;
+} PgProppatchExtProp;
+
+typedef struct {
+    UcxList *set; /* list of PgProppatchExtProp* */
+    UcxList *remove; /* list of PgProppatchExtProp* */
+    WSBool isused;
+} PgProppatchExt;
+
+typedef struct {
+    int64_t resource_id;
+    PgProppatchExt *ext;
+    size_t numext;
+    WSBool extensions_used;
+} PgProppatch;
+
+void* pg_webdav_init(ServerConfiguration *cfg, pool_handle_t *pool, WSConfigNode *config);
+WebdavBackend* pg_webdav_create(Session *sn, Request *rq, pblock *pb, void *initData);
+WebdavBackend* pg_webdav_create_from_resdata(Session *sn, Request *rq, PgRepository *repo, ResourceData *resdata);
+
+WebdavBackend* pg_webdav_prop_create(Session *sn, Request *rq, pblock *pb);
+
+int pg_create_property_param_arrays(WebdavPList *plist, UcxBuffer *xmlns, UcxBuffer *pname);
+
+/* ----------------- webdav backend functions ----------------- */
+int pg_dav_propfind_init(
+        WebdavPropfindRequest *rq,
+        const char *path,
+        const char *href,
+        WebdavPList **outplist);
+
+int pg_dav_propfind_do(
+	WebdavPropfindRequest *rq,
+	WebdavResponse *response,
+	VFS_DIR parent,
+	WebdavResource *resource,
+	struct stat *s);
+
+int pg_dav_propfind_finish(WebdavPropfindRequest *rq);
+
+int pg_dav_proppatch_do(
+	WebdavProppatchRequest *request,
+	WebdavResource *response,
+	VFSFile *file,
+	WebdavPList **out_set,
+	WebdavPList **out_remove);
+
+int pg_dav_proppatch_finish(
+	WebdavProppatchRequest *request,
+	WebdavResource *response,
+	VFSFile *file,
+	WSBool commit);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* PG_WEBDAV_H */
+