mod_dav: Some DAV extensions, like CalDAV, specify both document

elements and property elements that need to be taken into account 
when generating a property. The document element and property element
are made available in the dav_liveprop_elem structure under the
DAV_PROP_ELEMENT key in the resource pool.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1879889 13f79535-47bb-0310-9956-ffa450edef68

2 files changed, 32 insertions, 0 deletions

diff --git a/modules/dav/main/mod_dav.h b/modules/dav/main/mod_dav.h
index 05364f3e9d..b6a6a5f8e4 100644
--- a/modules/dav/main/mod_dav.h
+++ b/modules/dav/main/mod_dav.h
@@ -913,6 +913,14 @@ struct dav_hooks_liveprop
     ** property, and does not want it handled as a dead property, it should
     ** return DAV_PROP_INSERT_NOTSUPP.
     **
+    ** Some DAV extensions, like CalDAV, specify both document elements
+    ** and property elements that need to be taken into account when
+    ** generating a property. The document element and property element
+    ** are made available in the dav_liveprop_elem structure under the
+    ** DAV_PROP_ELEMENT key in the resource pool, accessible as follows:
+    **
+    ** apr_pool_userdata_get(&elem, DAV_PROP_ELEMENT, resource->pool);
+    **
     ** Returns one of DAV_PROP_INSERT_* based on what happened.
     **
     ** ### we may need more context... ie. the lock database
@@ -1061,6 +1069,20 @@ DAV_DECLARE(void) dav_add_all_liveprop_xmlns(apr_pool_t *p,
                                              apr_text_header *phdr);
 
 /*
+ ** When calling insert_prop(), the request element is associated with
+ ** the pool userdata attached to the resource. Access as follows:
+ **
+ ** apr_pool_userdata_get(&elem, DAV_PROP_ELEMENT, resource->pool);
+ **
+ */
+#define DAV_PROP_ELEMENT "mod_dav-element"
+
+typedef struct {
+    const apr_xml_doc *doc;
+    const apr_xml_elem *elem;
+} dav_liveprop_elem;
+
+/*
 ** The following three functions are part of mod_dav's internal handling
 ** for the core WebDAV properties. They are not part of mod_dav's API.
 */
diff --git a/modules/dav/main/props.c b/modules/dav/main/props.c
index 8b0e1212d8..37c5666ac1 100644
--- a/modules/dav/main/props.c
+++ b/modules/dav/main/props.c
@@ -795,10 +795,18 @@ DAV_DECLARE(dav_get_props_result) dav_get_props(dav_propdb *propdb,
     apr_text_header hdr_ns = { 0 };
     int have_good = 0;
     dav_get_props_result result = { 0 };
+    dav_liveprop_elem *element;
     char *marks_liveprop;
     dav_xmlns_info *xi;
     int xi_filled = 0;
 
+    /* we lose both the document and the element when calling (insert_prop),
+     * make these available in the pool.
+     */
+    element = apr_pcalloc(propdb->resource->pool, sizeof(dav_liveprop_elem));
+    element->doc = doc;
+    apr_pool_userdata_setn(element, DAV_PROP_ELEMENT, NULL, propdb->resource->pool);
+
     /* ### NOTE: we should pass in TWO buffers -- one for keys, one for
        the marks */
 
@@ -822,6 +830,8 @@ DAV_DECLARE(dav_get_props_result) dav_get_props(dav_propdb *propdb,
         dav_prop_insert inserted;
         dav_prop_name name;
 
+        element->elem = elem;
+
         /*
         ** First try live property providers; if they don't handle
         ** the property, then try looking it up in the propdb.