diff -r 5b58389ab9dd -r a8f8cdbf85df libidav/methods.c
--- a/libidav/methods.c	Fri Oct 23 22:15:12 2015 +0200
+++ b/libidav/methods.c	Tue Jan 12 19:17:46 2016 +0100
@@ -741,14 +741,14 @@
         DavProperty *p = elm->data;
         if(strcmp(p->ns->name, "DAV:")) {
             snprintf(prefix, 8, "x%d", pfxnum++);
-            ucx_map_cstr_put(namespaces, p->ns->name, prefix);
+            ucx_map_cstr_put(namespaces, p->ns->name, strdup(prefix));
         }
     }
     UCX_FOREACH(elm, data->remove) {
         DavProperty *p = elm->data;
         if(strcmp(p->ns->name, "DAV:")) {
             snprintf(prefix, 8, "x%d", pfxnum++);
-            ucx_map_cstr_put(namespaces, p->ns->name, prefix);
+            ucx_map_cstr_put(namespaces, p->ns->name, strdup(prefix));
         }
     }
     
@@ -782,6 +782,9 @@
         UCX_FOREACH(elm, data->set) {
             DavProperty *property = elm->data;
             char *prefix = ucx_map_cstr_get(namespaces, property->ns->name);
+            if(!prefix) {
+                prefix = "D";
+            }
             
             s = S("<");
             ucx_buffer_write(s.ptr, 1, s.length, buf);
@@ -834,6 +837,8 @@
     s = S("</D:propertyupdate>\n");
     ucx_buffer_write(s.ptr, 1, s.length, buf);
     
+    // TODO: cleanup namespace map
+    
     return buf;
 }
 
@@ -968,3 +973,36 @@
     curl_easy_setopt(handle, CURLOPT_NOBODY, 0L);
     return ret;
 }
+
+
+CURLcode do_copy_move_request(CURL *handle, char *dest, _Bool copy, _Bool override) {
+    if(copy) {
+        curl_easy_setopt(handle, CURLOPT_CUSTOMREQUEST, "COPY");
+    } else {
+        curl_easy_setopt(handle, CURLOPT_CUSTOMREQUEST, "MOVE");
+    }
+    curl_easy_setopt(handle, CURLOPT_PUT, 0L);  
+    curl_easy_setopt(handle, CURLOPT_UPLOAD, 0L);
+    
+    curl_easy_setopt(handle, CURLOPT_WRITEFUNCTION, dummy_write);
+    curl_easy_setopt(handle, CURLOPT_WRITEDATA, NULL);
+    
+    struct curl_slist *headers = NULL;
+    //sstr_t deststr = ucx_sprintf("Destination: %s", dest);
+    sstr_t deststr = sstrcat(2, S("Destination: "), sstr(dest));
+    headers = curl_slist_append(headers, deststr.ptr);
+    if(override) {
+        headers = curl_slist_append(headers, "Overwrite: T");
+    } else {
+        headers = curl_slist_append(headers, "Overwrite: F");
+    }
+    curl_easy_setopt(handle, CURLOPT_HTTPHEADER, headers);
+    
+    CURLcode ret = curl_easy_perform(handle);
+    free(deststr.ptr);
+    curl_slist_free_all(headers);
+    headers = NULL;
+    curl_easy_setopt(handle, CURLOPT_HTTPHEADER, headers);
+    return ret;
+}
+