diff -r 017a4f09e6fa -r 52e4171d42ce libidav/versioning.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libidav/versioning.c	Sun Sep 23 12:51:41 2018 +0200
@@ -0,0 +1,173 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2018 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.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "versioning.h"
+
+#include "methods.h"
+#include "utils.h"
+#include "session.h"
+
+static int basic_deltav_op(DavResource *res, char *method) {
+    DavSession *sn = res->session;
+    CURL *handle = sn->handle;
+    util_set_url(sn, dav_resource_get_href(res));
+    
+    DavLock *lock = dav_get_lock(res->session, res->path);
+    char *locktoken = lock ? lock->token : NULL;
+    
+    CURLcode ret = do_simple_request(sn, method, locktoken);
+    long status = 0;
+    curl_easy_getinfo (handle, CURLINFO_RESPONSE_CODE, &status);
+    if(!(ret == CURLE_OK && (status >= 200 && status < 300))) {
+        dav_session_set_error(sn, ret, status);
+        return 1;
+    }
+    return 0;
+}
+
+int dav_versioncontrol(DavResource *res) {
+    return basic_deltav_op(res, "VERSION-CONTROL");
+}
+
+int dav_checkout(DavResource *res) {
+    return basic_deltav_op(res, "CHECKOUT");
+}
+
+int dav_checkin(DavResource *res) {
+    return basic_deltav_op(res, "CHECKIN");
+}
+
+int dav_uncheckout(DavResource *res) {
+    return basic_deltav_op(res, "UNCHECKOUT");
+}
+
+DavResource* dav_versiontree(DavResource *res, char *properties) {
+    DavSession *sn = res->session;
+    util_set_url(sn, dav_resource_get_href(res));
+    
+    UcxList *proplist = NULL;
+    if(properties) {
+        proplist = parse_properties_string(sn->context, sstr(properties));
+    }
+    
+    // check if the list already contains a D:version-name property
+    int add_vname = 1;
+    UCX_FOREACH(elm, proplist) {
+        DavProperty *p = elm->data;
+        if(!strcmp(p->ns->name, "DAV:") && !strcmp(p->name, "version-name")) {
+            add_vname = 0;
+            break;
+        }
+    }
+    if(add_vname) {
+        // we need at least the D:version-name prop
+        DavProperty *p = malloc(sizeof(DavProperty));
+        p->ns = dav_get_namespace(sn->context, "D");
+        p->name = strdup("version-name");
+        p->value = NULL;
+        proplist = ucx_list_prepend(proplist, p);
+    }
+    
+    // create a version-tree request, which is almost the same as propfind
+    UcxBuffer *rqbuf = create_propfind_request(sn, proplist, "version-tree", 1);
+    UcxBuffer *rpbuf = ucx_buffer_new(NULL, 4096, UCX_BUFFER_AUTOEXTEND);
+    
+    // do the request
+    CURLcode ret = do_report_request(sn, rqbuf, rpbuf);
+    long status = 0;
+    curl_easy_getinfo (sn->handle, CURLINFO_RESPONSE_CODE, &status);
+    int error = 0;
+    DavResource *versions = NULL;
+    if(ret == CURLE_OK && status == 207) {
+        sn->error = DAV_OK;
+        
+        // parse multistatus response
+        PropfindParser *parser = create_propfind_parser(rpbuf, NULL);
+        if(parser) {
+            DavResource *list_end = NULL;
+            
+            ResponseTag response;
+            int r;
+            
+            // we don't want name decryption for version resources
+            int snflags = sn->flags;
+            sn->flags = 0;
+            while((r = get_propfind_response(parser, &response)) != 0) {
+                if(r == -1) {
+                    res->session->error = DAV_ERROR;
+                    error = 1;
+                    break;
+                }
+                DavResource *v = response2resource(sn, &response, NULL);
+                // add version to list
+                if(!versions) {
+                    versions = v;
+                } else {
+                    list_end->next = v;
+                }
+                list_end = v;
+                
+                cleanup_response(&response);
+            }
+            sn->flags = snflags;
+            
+            destroy_propfind_parser(parser);
+        } else {
+            sn->error = DAV_ERROR;
+            error = 1;
+        }
+    } else {
+        dav_session_set_error(sn, ret, status);
+        error = 1;
+    }
+    
+    // cleanup
+    while(proplist) {
+        DavProperty *p = proplist->data;
+        free(p->name);
+        free(p);
+        UcxList *next = proplist->next;
+        free(proplist);
+        proplist = next;
+    }
+    if(error && versions) {
+        DavResource *cur = versions;
+        while(cur) {
+            DavResource *next = cur->next;
+            dav_resource_free(cur);
+            cur = next;
+        }
+        versions = NULL;
+    }
+    
+    return versions;
+}
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