1 /* Licensed to the Apache Software Foundation (ASF) under one or more
2 * contributor license agreements. See the NOTICE file distributed with
3 * this work for additional information regarding copyright ownership.
4 * The ASF licenses this file to You under the Apache License, Version 2.0
5 * (the "License"); you may not use this file except in compliance with
6 * the License. You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
18 ** DAV extension module for Apache 2.0.*
24 #include "apr_hooks.h"
27 #include "apr_tables.h"
30 #include "util_filter.h"
33 #include <limits.h> /* for INT_MAX */
34 #include <time.h> /* for time_t */
41 #define DAV_VERSION AP_SERVER_BASEREVISION
43 #define DAV_XML_HEADER "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
44 #define DAV_XML_CONTENT_TYPE "text/xml; charset=\"utf-8\""
46 #define DAV_READ_BLOCKSIZE 2048 /* used for reading input blocks */
48 #define DAV_RESPONSE_BODY_1 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n<html><head>\n<title>"
49 #define DAV_RESPONSE_BODY_2 "</title>\n</head><body>\n<h1>"
50 #define DAV_RESPONSE_BODY_3 "</h1>\n<p>"
51 #define DAV_RESPONSE_BODY_4 "</p>\n"
52 #define DAV_RESPONSE_BODY_5 "</body></html>\n"
61 #define DBG0(f) ap_log_error(APLOG_MARK, \
62 APLOG_ERR, 0, NULL, (f))
63 #define DBG1(f,a1) ap_log_error(APLOG_MARK, \
64 APLOG_ERR, 0, NULL, f, a1)
65 #define DBG2(f,a1,a2) ap_log_error(APLOG_MARK, \
66 APLOG_ERR, 0, NULL, f, a1, a2)
67 #define DBG3(f,a1,a2,a3) ap_log_error(APLOG_MARK, \
68 APLOG_ERR, 0, NULL, f, a1, a2, a3)
74 #define DAV_INFINITY INT_MAX /* for the Depth: header */
76 /* Create a set of DAV_DECLARE(type), DAV_DECLARE_NONSTD(type) and
77 * DAV_DECLARE_DATA with appropriate export and import tags for the platform
80 #define DAV_DECLARE(type) type
81 #define DAV_DECLARE_NONSTD(type) type
82 #define DAV_DECLARE_DATA
83 #elif defined(DAV_DECLARE_STATIC)
84 #define DAV_DECLARE(type) type __stdcall
85 #define DAV_DECLARE_NONSTD(type) type
86 #define DAV_DECLARE_DATA
87 #elif defined(DAV_DECLARE_EXPORT)
88 #define DAV_DECLARE(type) __declspec(dllexport) type __stdcall
89 #define DAV_DECLARE_NONSTD(type) __declspec(dllexport) type
90 #define DAV_DECLARE_DATA __declspec(dllexport)
92 #define DAV_DECLARE(type) __declspec(dllimport) type __stdcall
93 #define DAV_DECLARE_NONSTD(type) __declspec(dllimport) type
94 #define DAV_DECLARE_DATA __declspec(dllimport)
97 /* --------------------------------------------------------------------
103 ** dav_error structure.
105 ** In most cases, mod_dav uses a pointer to a dav_error structure. If the
106 ** pointer is NULL, then no error has occurred.
108 ** In certain cases, a dav_error structure is directly used. In these cases,
109 ** a status value of 0 means that an error has not occurred.
111 ** Note: this implies that status != 0 whenever an error occurs.
113 ** The desc field is optional (it may be NULL). When NULL, it typically
114 ** implies that Apache has a proper description for the specified status.
116 typedef struct dav_error {
117 int status; /* suggested HTTP status (0 for no error) */
118 int error_id; /* DAV-specific error ID */
119 const char *desc; /* DAV:responsedescription and error log */
121 int save_errno; /* copy of errno causing the error */
123 const char *namespace; /* [optional] namespace of error */
124 const char *tagname; /* name of error-tag */
126 struct dav_error *prev; /* previous error (in stack) */
131 ** Create a new error structure. save_errno will be filled with the current
134 DAV_DECLARE(dav_error*) dav_new_error(apr_pool_t *p, int status,
135 int error_id, const char *desc);
139 ** Create a new error structure with tagname and (optional) namespace;
140 ** namespace may be NULL, which means "DAV:". save_errno will be
141 ** filled with the current errno value.
143 DAV_DECLARE(dav_error*) dav_new_error_tag(apr_pool_t *p, int status,
144 int error_id, const char *desc,
145 const char *namespace,
146 const char *tagname);
150 ** Push a new error description onto the stack of errors.
152 ** This function is used to provide an additional description to an existing
155 ** <status> should contain the caller's view of what the current status is,
156 ** given the underlying error. If it doesn't have a better idea, then the
157 ** caller should pass prev->status.
159 ** <error_id> can specify a new error_id since the topmost description has
162 DAV_DECLARE(dav_error*) dav_push_error(apr_pool_t *p, int status, int error_id,
163 const char *desc, dav_error *prev);
166 /* error ID values... */
168 /* IF: header errors */
169 #define DAV_ERR_IF_PARSE 100 /* general parsing error */
170 #define DAV_ERR_IF_MULTIPLE_NOT 101 /* multiple "Not" found */
171 #define DAV_ERR_IF_UNK_CHAR 102 /* unknown char in header */
172 #define DAV_ERR_IF_ABSENT 103 /* no locktokens given */
173 #define DAV_ERR_IF_TAGGED 104 /* in parsing tagged-list */
174 #define DAV_ERR_IF_UNCLOSED_PAREN 105 /* in no-tagged-list */
177 #define DAV_ERR_PROP_BAD_MAJOR 200 /* major version was wrong */
178 #define DAV_ERR_PROP_READONLY 201 /* prop is read-only */
179 #define DAV_ERR_PROP_NO_DATABASE 202 /* writable db not avail */
180 #define DAV_ERR_PROP_NOT_FOUND 203 /* prop not found */
181 #define DAV_ERR_PROP_BAD_LOCKDB 204 /* could not open lockdb */
182 #define DAV_ERR_PROP_OPENING 205 /* problem opening propdb */
183 #define DAV_ERR_PROP_EXEC 206 /* problem exec'ing patch */
185 /* Predefined DB errors */
186 /* ### any to define?? */
188 /* Predefined locking system errors */
189 #define DAV_ERR_LOCK_OPENDB 400 /* could not open lockdb */
190 #define DAV_ERR_LOCK_NO_DB 401 /* no database defined */
191 #define DAV_ERR_LOCK_CORRUPT_DB 402 /* DB is corrupt */
192 #define DAV_ERR_LOCK_UNK_STATE_TOKEN 403 /* unknown State-token */
193 #define DAV_ERR_LOCK_PARSE_TOKEN 404 /* bad opaquelocktoken */
194 #define DAV_ERR_LOCK_SAVE_LOCK 405 /* err saving locks */
197 ** Some comments on Error ID values:
199 ** The numbers do not necessarily need to be unique. Uniqueness simply means
200 ** that two errors that have not been predefined above can be distinguished
201 ** from each other. At the moment, mod_dav does not use this distinguishing
202 ** feature, but it could be used in the future to collapse <response> elements
203 ** into groups based on the error ID (and associated responsedescription).
205 ** If a compute_desc is provided, then the error ID should be unique within
206 ** the context of the compute_desc function (so the function can figure out
207 ** what to filled into the desc).
209 ** Basically, subsystems can ignore defining new error ID values if they want
210 ** to. The subsystems *do* need to return the predefined errors when
211 ** appropriate, so that mod_dav can figure out what to do. Subsystems can
212 ** simply leave the error ID field unfilled (zero) if there isn't an error
213 ** that must be placed there.
217 /* --------------------------------------------------------------------
221 ** These are here for forward-declaration purposes. For more info, see
222 ** the section title "HOOK HANDLING" for more information, plus each
223 ** structure definition.
226 /* forward-declare this structure */
227 typedef struct dav_hooks_propdb dav_hooks_propdb;
228 typedef struct dav_hooks_locks dav_hooks_locks;
229 typedef struct dav_hooks_vsn dav_hooks_vsn;
230 typedef struct dav_hooks_repository dav_hooks_repository;
231 typedef struct dav_hooks_liveprop dav_hooks_liveprop;
232 typedef struct dav_hooks_binding dav_hooks_binding;
233 typedef struct dav_hooks_search dav_hooks_search;
235 /* ### deprecated name */
236 typedef dav_hooks_propdb dav_hooks_db;
239 /* --------------------------------------------------------------------
246 ** The base protocol defines only file and collection resources.
247 ** The versioning protocol defines several additional resource types
248 ** to represent artifacts of a version control system.
250 ** This enumeration identifies the type of URL used to identify the
251 ** resource. Since the same resource may have more than one type of
252 ** URL which can identify it, dav_resource_type cannot be used
253 ** alone to determine the type of the resource; attributes of the
254 ** dav_resource object must also be consulted.
257 DAV_RESOURCE_TYPE_UNKNOWN,
259 DAV_RESOURCE_TYPE_REGULAR, /* file or collection; could be
260 * unversioned, or version selector,
261 * or baseline selector */
263 DAV_RESOURCE_TYPE_VERSION, /* version or baseline URL */
265 DAV_RESOURCE_TYPE_HISTORY, /* version or baseline history URL */
267 DAV_RESOURCE_TYPE_WORKING, /* working resource URL */
269 DAV_RESOURCE_TYPE_WORKSPACE, /* workspace URL */
271 DAV_RESOURCE_TYPE_ACTIVITY, /* activity URL */
273 DAV_RESOURCE_TYPE_PRIVATE /* repository-private type */
278 ** Opaque, repository-specific information for a resource.
280 typedef struct dav_resource_private dav_resource_private;
283 ** Resource descriptor, generated by a repository provider.
285 ** Note: the lock-null state is not explicitly represented here,
286 ** since it may be expensive to compute. Use dav_get_resource_state()
287 ** to determine whether a non-existent resource is a lock-null resource.
289 ** A quick explanation of how the flags can apply to different resources:
291 ** unversioned file or collection:
292 ** type = DAV_RESOURCE_TYPE_REGULAR
293 ** exists = ? (1 if exists)
294 ** collection = ? (1 if collection)
299 ** version-controlled resource or configuration:
300 ** type = DAV_RESOURCE_TYPE_REGULAR
302 ** collection = ? (1 if collection)
304 ** baselined = ? (1 if configuration)
305 ** working = ? (1 if checked out)
307 ** version/baseline history:
308 ** type = DAV_RESOURCE_TYPE_HISTORY
316 ** type = DAV_RESOURCE_TYPE_VERSION
318 ** collection = ? (1 if collection)
320 ** baselined = ? (1 if baseline)
324 ** type = DAV_RESOURCE_TYPE_WORKING
326 ** collection = ? (1 if collection)
332 ** type = DAV_RESOURCE_TYPE_WORKSPACE
333 ** exists = ? (1 if exists)
335 ** versioned = ? (1 if version-controlled)
336 ** baselined = ? (1 if baseline-controlled)
337 ** working = ? (1 if checked out)
340 ** type = DAV_RESOURCE_TYPE_ACTIVITY
341 ** exists = ? (1 if exists)
347 typedef struct dav_resource {
348 dav_resource_type type;
350 int exists; /* 0 => null resource */
352 int collection; /* 0 => file; can be 1 for
353 * REGULAR, VERSION, and WORKING resources,
354 * and is always 1 for WORKSPACE */
356 int versioned; /* 0 => unversioned; can be 1 for
357 * REGULAR and WORKSPACE resources,
358 * and is always 1 for VERSION and WORKING */
360 int baselined; /* 0 => not baselined; can be 1 for
361 * REGULAR, VERSION, and WORKSPACE resources;
362 * versioned == 1 when baselined == 1 */
364 int working; /* 0 => not checked out; can be 1 for
365 * REGULAR and WORKSPACE resources,
366 * and is always 1 for WORKING */
368 const char *uri; /* the URI for this resource */
370 dav_resource_private *info; /* the provider's private info */
372 const dav_hooks_repository *hooks; /* hooks used for this resource */
374 /* When allocating items related specifically to this resource, the
375 following pool should be used. Its lifetime will be at least as
376 long as the dav_resource structure. */
382 ** Lock token type. Lock providers define the details of a lock token.
383 ** However, all providers are expected to at least be able to parse
384 ** the "opaquelocktoken" scheme, which is represented by a uuid_t.
386 typedef struct dav_locktoken dav_locktoken;
389 /* --------------------------------------------------------------------
393 ** These buffers are used as a lightweight buffer reuse mechanism. Apache
394 ** provides sub-pool creation and destruction to much the same effect, but
395 ** the sub-pools are a bit more general and heavyweight than these buffers.
398 /* buffer for reuse; can grow to accomodate needed size */
401 apr_size_t alloc_len; /* how much has been allocated */
402 apr_size_t cur_len; /* how much is currently being used */
403 char *buf; /* buffer contents */
405 #define DAV_BUFFER_MINSIZE 256 /* minimum size for buffer */
406 #define DAV_BUFFER_PAD 64 /* amount of pad when growing */
408 /* set the cur_len to the given size and ensure space is available */
409 DAV_DECLARE(void) dav_set_bufsize(apr_pool_t *p, dav_buffer *pbuf,
412 /* initialize a buffer and copy the specified (null-term'd) string into it */
413 DAV_DECLARE(void) dav_buffer_init(apr_pool_t *p, dav_buffer *pbuf,
416 /* check that the buffer can accomodate <extra_needed> more bytes */
417 DAV_DECLARE(void) dav_check_bufsize(apr_pool_t *p, dav_buffer *pbuf,
418 apr_size_t extra_needed);
420 /* append a string to the end of the buffer, adjust length */
421 DAV_DECLARE(void) dav_buffer_append(apr_pool_t *p, dav_buffer *pbuf,
424 /* place a string on the end of the buffer, do NOT adjust length */
425 DAV_DECLARE(void) dav_buffer_place(apr_pool_t *p, dav_buffer *pbuf,
428 /* place some memory on the end of a buffer; do NOT adjust length */
429 DAV_DECLARE(void) dav_buffer_place_mem(apr_pool_t *p, dav_buffer *pbuf,
430 const void *mem, apr_size_t amt,
434 /* --------------------------------------------------------------------
439 /* contains results from one of the getprop functions */
442 apr_text * propstats; /* <propstat> element text */
443 apr_text * xmlns; /* namespace decls for <response> elem */
444 } dav_get_props_result;
446 /* holds the contents of a <response> element */
447 typedef struct dav_response
449 const char *href; /* always */
450 const char *desc; /* optional description at <response> level */
452 /* use status if propresult.propstats is NULL. */
453 dav_get_props_result propresult;
457 struct dav_response *next;
462 request_rec *rnew; /* new subrequest */
463 dav_error err; /* potential error response */
467 DAV_DECLARE(dav_lookup_result) dav_lookup_uri(const char *uri, request_rec *r,
468 int must_be_absolute);
470 /* defines type of property info a provider is to return */
472 DAV_PROP_INSERT_NOTDEF, /* property is defined by this provider,
473 but nothing was inserted because the
474 (live) property is not defined for this
475 resource (it may be present as a dead
477 DAV_PROP_INSERT_NOTSUPP, /* property is recognized by this provider,
478 but it is not supported, and cannot be
479 treated as a dead property */
480 DAV_PROP_INSERT_NAME, /* a property name (empty elem) was
481 inserted into the text block */
482 DAV_PROP_INSERT_VALUE, /* a property name/value pair was inserted
483 into the text block */
484 DAV_PROP_INSERT_SUPPORTED /* a supported live property was added to
486 <DAV:supported-live-property> element */
489 /* ### this stuff is private to dav/fs/repos.c; move it... */
490 /* format a time string (buf must be at least DAV_TIMEBUF_SIZE chars) */
491 #define DAV_STYLE_ISO8601 1
492 #define DAV_STYLE_RFC822 2
493 #define DAV_TIMEBUF_SIZE 30
495 DAV_DECLARE(int) dav_get_depth(request_rec *r, int def_depth);
497 DAV_DECLARE(int) dav_validate_root(const apr_xml_doc *doc,
498 const char *tagname);
499 DAV_DECLARE(apr_xml_elem *) dav_find_child(const apr_xml_elem *elem,
500 const char *tagname);
502 /* gather up all the CDATA into a single string */
503 DAV_DECLARE(const char *) dav_xml_get_cdata(const apr_xml_elem *elem, apr_pool_t *pool,
507 ** XML namespace handling
509 ** This structure tracks namespace declarations (xmlns:prefix="URI").
510 ** It maintains a one-to-many relationship of URIs-to-prefixes. In other
511 ** words, one URI may be defined by many prefixes, but any specific
512 ** prefix will specify only one URI.
514 ** Prefixes using the "g###" pattern can be generated automatically if
515 ** the caller does not have specific prefix requirements.
519 apr_hash_t *uri_prefix; /* map URIs to an available prefix */
520 apr_hash_t *prefix_uri; /* map all prefixes to their URIs */
521 int count; /* counter for "g###" prefixes */
524 /* create an empty dav_xmlns_info structure */
525 DAV_DECLARE(dav_xmlns_info *) dav_xmlns_create(apr_pool_t *pool);
527 /* add a specific prefix/URI pair. the prefix/uri should have a lifetime
528 at least that of xmlns->pool */
529 DAV_DECLARE(void) dav_xmlns_add(dav_xmlns_info *xi,
530 const char *prefix, const char *uri);
532 /* add a URI (if not present); any prefix is acceptable and is returned.
533 the uri should have a lifetime at least that xmlns->pool */
534 DAV_DECLARE(const char *) dav_xmlns_add_uri(dav_xmlns_info *xi,
537 /* return the URI for a specified prefix (or NULL if the prefix is unknown) */
538 DAV_DECLARE(const char *) dav_xmlns_get_uri(dav_xmlns_info *xi,
541 /* return an available prefix for a specified URI (or NULL if the URI
543 DAV_DECLARE(const char *) dav_xmlns_get_prefix(dav_xmlns_info *xi,
546 /* generate xmlns declarations (appending into the given text) */
547 DAV_DECLARE(void) dav_xmlns_generate(dav_xmlns_info *xi,
548 apr_text_header *phdr);
550 /* --------------------------------------------------------------------
560 ** This structure wraps up all of the hooks that a mod_dav provider can
561 ** supply. The provider MUST supply <repos> and <propdb>. The rest are
562 ** optional and should contain NULL if that feature is not supplied.
564 ** Note that a provider cannot pick and choose portions from various
565 ** underlying implementations (which was theoretically possible in
566 ** mod_dav 1.0). There are too many dependencies between a dav_resource
567 ** (defined by <repos>) and the other functionality.
569 ** Live properties are not part of the dav_provider structure because they
570 ** are handled through the APR_HOOK interface (to allow for multiple liveprop
571 ** providers). The core always provides some properties, and then a given
572 ** provider will add more properties.
574 ** Some providers may need to associate a context with the dav_provider
575 ** structure -- the ctx field is available for storing this context. Just
576 ** leave it NULL if it isn't required.
579 const dav_hooks_repository *repos;
580 const dav_hooks_propdb *propdb;
581 const dav_hooks_locks *locks;
582 const dav_hooks_vsn *vsn;
583 const dav_hooks_binding *binding;
584 const dav_hooks_search *search;
590 ** gather_propsets: gather all live property propset-URIs
592 ** The hook implementor should push one or more URIs into the specified
593 ** array. These URIs are returned in the DAV: header to let clients know
594 ** what sets of live properties are supported by the installation. mod_dav
595 ** will place open/close angle brackets around each value (much like
596 ** a Coded-URL); quotes and brackets should not be in the value.
598 ** Example: http://apache.org/dav/props/
600 ** (of course, use your own domain to ensure a unique value)
602 APR_DECLARE_EXTERNAL_HOOK(dav, DAV, void, gather_propsets,
603 (apr_array_header_t *uris))
606 ** find_liveprop: find a live property, returning a non-zero, unique,
607 ** opaque identifier.
609 ** If the hook implementor determines the specified URI/name refers to
610 ** one of its properties, then it should fill in HOOKS and return a
611 ** non-zero value. The returned value is the "property ID" and will
612 ** be passed to the various liveprop hook functions.
614 ** Return 0 if the property is not defined by the hook implementor.
616 APR_DECLARE_EXTERNAL_HOOK(dav, DAV, int, find_liveprop,
617 (const dav_resource *resource,
618 const char *ns_uri, const char *name,
619 const dav_hooks_liveprop **hooks))
622 ** insert_all_liveprops: insert all (known) live property names/values.
624 ** The hook implementor should append XML text to PHDR, containing liveprop
625 ** names. If INSVALUE is true, then the property values should also be
626 ** inserted into the output XML stream.
628 ** The liveprop provider should insert *all* known and *defined* live
629 ** properties on the specified resource. If a particular liveprop is
630 ** not defined for this resource, then it should not be inserted.
632 APR_DECLARE_EXTERNAL_HOOK(dav, DAV, void, insert_all_liveprops,
633 (request_rec *r, const dav_resource *resource,
634 dav_prop_insert what, apr_text_header *phdr))
636 DAV_DECLARE(const dav_hooks_locks *) dav_get_lock_hooks(request_rec *r);
637 DAV_DECLARE(const dav_hooks_propdb *) dav_get_propdb_hooks(request_rec *r);
638 DAV_DECLARE(const dav_hooks_vsn *) dav_get_vsn_hooks(request_rec *r);
639 DAV_DECLARE(const dav_hooks_binding *) dav_get_binding_hooks(request_rec *r);
640 DAV_DECLARE(const dav_hooks_search *) dav_get_search_hooks(request_rec *r);
642 DAV_DECLARE(void) dav_register_provider(apr_pool_t *p, const char *name,
643 const dav_provider *hooks);
644 DAV_DECLARE(const dav_provider *) dav_lookup_provider(const char *name);
648 #define DAV_GET_HOOKS_PROPDB(r) dav_get_propdb_hooks(r)
649 #define DAV_GET_HOOKS_LOCKS(r) dav_get_lock_hooks(r)
650 #define DAV_GET_HOOKS_VSN(r) dav_get_vsn_hooks(r)
651 #define DAV_GET_HOOKS_BINDING(r) dav_get_binding_hooks(r)
652 #define DAV_GET_HOOKS_SEARCH(r) dav_get_search_hooks(r)
655 /* --------------------------------------------------------------------
657 ** IF HEADER PROCESSING
659 ** Here is the definition of the If: header from RFC 2518, S9.4:
661 ** If = "If" ":" (1*No-tag-list | 1*Tagged-list)
662 ** No-tag-list = List
663 ** Tagged-list = Resource 1*List
664 ** Resource = Coded-URL
665 ** List = "(" 1*(["Not"](State-token | "[" entity-tag "]")) ")"
666 ** State-token = Coded-URL
667 ** Coded-URL = "<" absoluteURI ">" ; absoluteURI from RFC 2616
669 ** List corresponds to dav_if_state_list. No-tag-list corresponds to
670 ** dav_if_header with uri==NULL. Tagged-list corresponds to a sequence of
671 ** dav_if_header structures with (duplicate) uri==Resource -- one
672 ** dav_if_header per state_list. A second Tagged-list will start a new
673 ** sequence of dav_if_header structures with the new URI.
675 ** A summary of the semantics, mapped into our structures:
676 ** - Chained dav_if_headers: OR
677 ** - Chained dav_if_state_lists: AND
678 ** - NULL uri matches all resources
687 typedef struct dav_if_state_list
689 dav_if_state_type type;
692 #define DAV_IF_COND_NORMAL 0
693 #define DAV_IF_COND_NOT 1 /* "Not" was applied */
696 dav_locktoken *locktoken;
698 struct dav_if_state_list *next;
701 typedef struct dav_if_header
705 struct dav_if_state_list *state;
706 struct dav_if_header *next;
708 int dummy_header; /* used internally by the lock/etag validation */
711 typedef struct dav_locktoken_list
713 dav_locktoken *locktoken;
714 struct dav_locktoken_list *next;
715 } dav_locktoken_list;
717 DAV_DECLARE(dav_error *) dav_get_locktoken_list(request_rec *r,
718 dav_locktoken_list **ltl);
721 /* --------------------------------------------------------------------
723 ** LIVE PROPERTY HANDLING
726 /* opaque type for PROPPATCH rollback information */
727 typedef struct dav_liveprop_rollback dav_liveprop_rollback;
729 struct dav_hooks_liveprop
732 ** Insert property information into a text block. The property to
733 ** insert is identified by the propid value. The information to insert
734 ** is identified by the "what" argument, as follows:
735 ** DAV_PROP_INSERT_NAME
736 ** property name, as an empty XML element
737 ** DAV_PROP_INSERT_VALUE
738 ** property name/value, as an XML element
739 ** DAV_PROP_INSERT_SUPPORTED
740 ** if the property is defined on the resource, then
741 ** a DAV:supported-live-property element, as defined
742 ** by the DeltaV extensions to RFC2518.
744 ** Providers should return DAV_PROP_INSERT_NOTDEF if the property is
745 ** known and not defined for this resource, so should be handled as a
746 ** dead property. If a provider recognizes, but does not support, a
747 ** property, and does not want it handled as a dead property, it should
748 ** return DAV_PROP_INSERT_NOTSUPP.
750 ** Returns one of DAV_PROP_INSERT_* based on what happened.
752 ** ### we may need more context... ie. the lock database
754 dav_prop_insert (*insert_prop)(const dav_resource *resource,
755 int propid, dav_prop_insert what,
756 apr_text_header *phdr);
759 ** Determine whether a given property is writable.
761 ** ### we may want a different semantic. i.e. maybe it should be
762 ** ### "can we write <value> into this property?"
764 ** Returns 1 if the live property can be written, 0 if read-only.
766 int (*is_writable)(const dav_resource *resource, int propid);
769 ** This member defines the set of namespace URIs that the provider
770 ** uses for its properties. When insert_all is called, it will be
771 ** passed a list of integers that map from indices into this list
772 ** to namespace IDs for output generation.
774 ** The last entry in this list should be a NULL value (sentinel).
776 const char * const * namespace_uris;
779 ** ### this is not the final design. we want an open-ended way for
780 ** ### liveprop providers to attach *new* properties. To this end,
781 ** ### we'll have a "give me a list of the props you define", a way
782 ** ### to check for a prop's existence, a way to validate a set/remove
783 ** ### of a prop, and a way to execute/commit/rollback that change.
787 ** Validate that the live property can be assigned a value, and that
788 ** the provided value is valid.
790 ** elem will point to the XML element that names the property. For
792 ** <lp1:executable>T</lp1:executable>
794 ** The provider can access the cdata fields and the child elements
795 ** to extract the relevant pieces.
797 ** operation is one of DAV_PROP_OP_SET or _DELETE.
799 ** The provider may return a value in *context which will be passed
800 ** to each of the exec/commit/rollback functions. For example, this
801 ** may contain an internal value which has been processed from the
804 ** The provider must set defer_to_dead to true (non-zero) or false.
805 ** If true, then the set/remove is deferred to the dead property
806 ** database. Note: it will be set to zero on entry.
808 dav_error * (*patch_validate)(const dav_resource *resource,
809 const apr_xml_elem *elem,
815 dav_error * (*patch_exec)(const dav_resource *resource,
816 const apr_xml_elem *elem,
819 dav_liveprop_rollback **rollback_ctx);
822 void (*patch_commit)(const dav_resource *resource,
825 dav_liveprop_rollback *rollback_ctx);
828 dav_error * (*patch_rollback)(const dav_resource *resource,
831 dav_liveprop_rollback *rollback_ctx);
834 ** If a provider needs a context to associate with this hooks structure,
835 ** then this field may be used. In most cases, it will just be NULL.
841 ** dav_liveprop_spec: specify a live property
843 ** This structure is used as a standard way to determine if a particular
844 ** property is a live property. Its use is not part of the mandated liveprop
845 ** interface, but can be used by liveprop providers in conjuction with the
846 ** utility routines below.
848 ** spec->name == NULL is the defined end-sentinel for a list of specs.
851 int ns; /* provider-local namespace index */
852 const char *name; /* name of the property */
854 int propid; /* provider-local property ID */
856 int is_writable; /* is the property writable? */
861 ** dav_liveprop_group: specify a group of liveprops
863 ** This structure specifies a group of live properties, their namespaces,
864 ** and how to handle them.
867 const dav_liveprop_spec *specs;
868 const char * const *namespace_uris;
869 const dav_hooks_liveprop *hooks;
871 } dav_liveprop_group;
874 DAV_DECLARE(int) dav_do_find_liveprop(const char *ns_uri, const char *name,
875 const dav_liveprop_group *group,
876 const dav_hooks_liveprop **hooks);
879 DAV_DECLARE(int) dav_get_liveprop_info(int propid,
880 const dav_liveprop_group *group,
881 const dav_liveprop_spec **info);
884 DAV_DECLARE(void) dav_register_liveprop_group(apr_pool_t *pool,
885 const dav_liveprop_group *group);
888 DAV_DECLARE(int) dav_get_liveprop_ns_index(const char *uri);
891 DAV_DECLARE(int) dav_get_liveprop_ns_count(void);
894 DAV_DECLARE(void) dav_add_all_liveprop_xmlns(apr_pool_t *p,
895 apr_text_header *phdr);
898 ** The following three functions are part of mod_dav's internal handling
899 ** for the core WebDAV properties. They are not part of mod_dav's API.
901 DAV_DECLARE_NONSTD(int) dav_core_find_liveprop(
902 const dav_resource *resource,
905 const dav_hooks_liveprop **hooks);
906 DAV_DECLARE_NONSTD(void) dav_core_insert_all_liveprops(
908 const dav_resource *resource,
909 dav_prop_insert what,
910 apr_text_header *phdr);
911 DAV_DECLARE_NONSTD(void) dav_core_register_uris(apr_pool_t *p);
915 ** Standard WebDAV Property Identifiers
917 ** A live property provider does not need to use these; they are simply
918 ** provided for convenience.
920 ** Property identifiers need to be unique within a given provider, but not
921 ** *across* providers (note: this uniqueness constraint was different in
922 ** older versions of mod_dav).
924 ** The identifiers start at 20000 to make it easier for providers to avoid
925 ** conflicts with the standard properties. The properties are arranged
926 ** alphabetically, and may be reordered from time to time (as properties
929 ** NOTE: there is no problem with reordering (e.g. binary compat) since the
930 ** identifiers are only used within a given provider, which would pick up
931 ** the entire set of changes upon a recompile.
934 DAV_PROPID_BEGIN = 20000,
936 /* Standard WebDAV properties (RFC 2518) */
937 DAV_PROPID_creationdate,
938 DAV_PROPID_displayname,
939 DAV_PROPID_getcontentlanguage,
940 DAV_PROPID_getcontentlength,
941 DAV_PROPID_getcontenttype,
943 DAV_PROPID_getlastmodified,
944 DAV_PROPID_lockdiscovery,
945 DAV_PROPID_resourcetype,
947 DAV_PROPID_supportedlock,
949 /* DeltaV properties (from the I-D (#14)) */
950 DAV_PROPID_activity_checkout_set,
951 DAV_PROPID_activity_set,
952 DAV_PROPID_activity_version_set,
953 DAV_PROPID_auto_merge_set,
954 DAV_PROPID_auto_version,
955 DAV_PROPID_baseline_collection,
956 DAV_PROPID_baseline_controlled_collection,
957 DAV_PROPID_baseline_controlled_collection_set,
958 DAV_PROPID_checked_in,
959 DAV_PROPID_checked_out,
960 DAV_PROPID_checkin_fork,
961 DAV_PROPID_checkout_fork,
962 DAV_PROPID_checkout_set,
964 DAV_PROPID_creator_displayname,
965 DAV_PROPID_current_activity_set,
966 DAV_PROPID_current_workspace_set,
967 DAV_PROPID_default_variant,
968 DAV_PROPID_eclipsed_set,
969 DAV_PROPID_label_name_set,
970 DAV_PROPID_merge_set,
971 DAV_PROPID_precursor_set,
972 DAV_PROPID_predecessor_set,
973 DAV_PROPID_root_version,
974 DAV_PROPID_subactivity_set,
975 DAV_PROPID_subbaseline_set,
976 DAV_PROPID_successor_set,
977 DAV_PROPID_supported_method_set,
978 DAV_PROPID_supported_live_property_set,
979 DAV_PROPID_supported_report_set,
980 DAV_PROPID_unreserved,
981 DAV_PROPID_variant_set,
982 DAV_PROPID_version_controlled_binding_set,
983 DAV_PROPID_version_controlled_configuration,
984 DAV_PROPID_version_history,
985 DAV_PROPID_version_name,
986 DAV_PROPID_workspace,
987 DAV_PROPID_workspace_checkout_set,
993 ** Property Identifier Registration
995 ** At the moment, mod_dav requires live property providers to ensure that
996 ** each property returned has a unique value. For now, this is done through
997 ** central registration (there are no known providers other than the default,
998 ** so this remains manageable).
1000 ** WARNING: the TEST ranges should never be "shipped".
1002 #define DAV_PROPID_CORE 10000 /* ..10099. defined by mod_dav */
1003 #define DAV_PROPID_FS 10100 /* ..10299.
1004 mod_dav filesystem provider. */
1005 #define DAV_PROPID_TEST1 10300 /* ..10399 */
1006 #define DAV_PROPID_TEST2 10400 /* ..10499 */
1007 #define DAV_PROPID_TEST3 10500 /* ..10599 */
1011 /* --------------------------------------------------------------------
1013 ** DATABASE FUNCTIONS
1016 typedef struct dav_db dav_db;
1017 typedef struct dav_namespace_map dav_namespace_map;
1018 typedef struct dav_deadprop_rollback dav_deadprop_rollback;
1021 const char *ns; /* "" signals "no namespace" */
1025 /* hook functions to enable pluggable databases */
1026 struct dav_hooks_propdb
1028 dav_error * (*open)(apr_pool_t *p, const dav_resource *resource, int ro,
1030 void (*close)(dav_db *db);
1033 ** In bulk, define any namespaces that the values and their name
1034 ** elements may need.
1036 ** Note: sometimes mod_dav will defer calling this until output_value
1037 ** returns found==1. If the output process needs the dav_xmlns_info
1038 ** filled for its work, then it will need to fill it on demand rather
1039 ** than depending upon this hook to fill in the structure.
1041 ** Note: this will *always* be called during an output sequence. Thus,
1042 ** the provider may rely solely on using this to fill the xmlns info.
1044 dav_error * (*define_namespaces)(dav_db *db, dav_xmlns_info *xi);
1047 ** Output the value from the database (i.e. add an element name and
1048 ** the value into *phdr). Set *found based on whether the name/value
1049 ** was found in the propdb.
1051 ** Note: it is NOT an error for the key/value pair to not exist.
1053 ** The dav_xmlns_info passed to define_namespaces() is also passed to
1054 ** each output_value() call so that namespaces can be added on-demand.
1055 ** It can also be used to look up prefixes or URIs during the output
1058 dav_error * (*output_value)(dav_db *db, const dav_prop_name *name,
1060 apr_text_header *phdr, int *found);
1063 ** Build a mapping from "global" namespaces (stored in apr_xml_*)
1064 ** into provider-local namespace identifiers.
1066 ** This mapping should be done once per set of namespaces, and the
1067 ** resulting mapping should be passed into the store() hook function.
1069 ** Note: usually, there is just a single document/namespaces for all
1070 ** elements passed. However, the generality of creating multiple
1071 ** mappings and passing them to store() is provided here.
1073 ** Note: this is only in preparation for a series of store() calls.
1074 ** As a result, the propdb must be open for read/write access when
1075 ** this function is called.
1077 dav_error * (*map_namespaces)(dav_db *db,
1078 const apr_array_header_t *namespaces,
1079 dav_namespace_map **mapping);
1082 ** Store a property value for a given name. The value->combined field
1083 ** MUST be set for this call.
1085 ** ### WARNING: current providers will quote the text within ELEM.
1086 ** ### this implies you can call this function only once with a given
1087 ** ### element structure (a second time will quote it again).
1089 dav_error * (*store)(dav_db *db, const dav_prop_name *name,
1090 const apr_xml_elem *elem,
1091 dav_namespace_map *mapping);
1093 /* remove a given property */
1094 dav_error * (*remove)(dav_db *db, const dav_prop_name *name);
1096 /* returns 1 if the record specified by "key" exists; 0 otherwise */
1097 int (*exists)(dav_db *db, const dav_prop_name *name);
1100 ** Iterate over the property names in the database.
1102 ** iter->name.ns == iter->name.name == NULL when there are no more names.
1104 ** Note: only one iteration may occur over the propdb at a time.
1106 dav_error * (*first_name)(dav_db *db, dav_prop_name *pname);
1107 dav_error * (*next_name)(dav_db *db, dav_prop_name *pname);
1110 ** Rollback support: get rollback context, and apply it.
1112 ** struct dav_deadprop_rollback is a provider-private structure; it
1113 ** should remember the name, and the name's old value (or the fact that
1114 ** the value was not present, and should be deleted if a rollback occurs).
1116 dav_error * (*get_rollback)(dav_db *db, const dav_prop_name *name,
1117 dav_deadprop_rollback **prollback);
1118 dav_error * (*apply_rollback)(dav_db *db,
1119 dav_deadprop_rollback *rollback);
1122 ** If a provider needs a context to associate with this hooks structure,
1123 ** then this field may be used. In most cases, it will just be NULL.
1129 /* --------------------------------------------------------------------
1134 /* Used to represent a Timeout header of "Infinity" */
1135 #define DAV_TIMEOUT_INFINITE 0
1137 DAV_DECLARE(time_t) dav_get_timeout(request_rec *r);
1140 ** Opaque, provider-specific information for a lock database.
1142 typedef struct dav_lockdb_private dav_lockdb_private;
1145 ** Opaque, provider-specific information for a lock record.
1147 typedef struct dav_lock_private dav_lock_private;
1150 ** Lock database type. Lock providers are urged to implement a "lazy" open, so
1151 ** doing an "open" is cheap until something is actually needed from the DB.
1155 const dav_hooks_locks *hooks; /* the hooks used for this lockdb */
1156 int ro; /* was it opened readonly? */
1158 dav_lockdb_private *info;
1163 DAV_LOCKSCOPE_UNKNOWN,
1164 DAV_LOCKSCOPE_EXCLUSIVE,
1165 DAV_LOCKSCOPE_SHARED
1169 DAV_LOCKTYPE_UNKNOWN,
1174 DAV_LOCKREC_DIRECT, /* lock asserted on this resource */
1175 DAV_LOCKREC_INDIRECT, /* lock inherited from a parent */
1176 DAV_LOCKREC_INDIRECT_PARTIAL /* most info is not filled in */
1180 ** dav_lock: hold information about a lock on a resource.
1182 ** This structure is used for both direct and indirect locks. A direct lock
1183 ** is a lock applied to a specific resource by the client. An indirect lock
1184 ** is one that is inherited from a parent resource by virtue of a non-zero
1185 ** Depth: header when the lock was applied.
1187 ** mod_dav records both types of locks in the lock database, managing their
1188 ** addition/removal as resources are moved about the namespace.
1190 ** Note that the lockdb is free to marshal this structure in any form that
1193 ** For a "partial" lock, the <rectype> and <locktoken> fields must be filled
1194 ** in. All other (user) fields should be zeroed. The lock provider will
1195 ** usually fill in the <info> field, and the <next> field may be used to
1196 ** construct a list of partial locks.
1198 ** The lock provider MUST use the info field to store a value such that a
1199 ** dav_lock structure can locate itself in the underlying lock database.
1200 ** This requirement is needed for refreshing: when an indirect dav_lock is
1201 ** refreshed, its reference to the direct lock does not specify the direct's
1202 ** resource, so the only way to locate the (refreshed, direct) lock in the
1203 ** database is to use the info field.
1205 ** Note that <is_locknull> only refers to the resource where this lock was
1207 ** ### hrm. that says the abstraction is wrong. is_locknull may disappear.
1209 typedef struct dav_lock
1211 dav_lock_rectype rectype; /* type of lock record */
1212 int is_locknull; /* lock establishes a locknull resource */
1214 /* ### put the resource in here? */
1216 dav_lock_scope scope; /* scope of the lock */
1217 dav_lock_type type; /* type of lock */
1218 int depth; /* depth of the lock */
1219 time_t timeout; /* when the lock will timeout */
1221 const dav_locktoken *locktoken; /* the token that was issued */
1223 const char *owner; /* (XML) owner of the lock */
1224 const char *auth_user; /* auth'd username owning lock */
1226 dav_lock_private *info; /* private to the lockdb */
1228 struct dav_lock *next; /* for managing a list of locks */
1231 /* Property-related public lock functions */
1232 DAV_DECLARE(const char *)dav_lock_get_activelock(request_rec *r,
1236 /* LockDB-related public lock functions */
1237 DAV_DECLARE(dav_error *) dav_lock_parse_lockinfo(request_rec *r,
1238 const dav_resource *resrouce,
1240 const apr_xml_doc *doc,
1241 dav_lock **lock_request);
1242 DAV_DECLARE(int) dav_unlock(request_rec *r,
1243 const dav_resource *resource,
1244 const dav_locktoken *locktoken);
1245 DAV_DECLARE(dav_error *) dav_add_lock(request_rec *r,
1246 const dav_resource *resource,
1247 dav_lockdb *lockdb, dav_lock *request,
1248 dav_response **response);
1249 DAV_DECLARE(dav_error *) dav_notify_created(request_rec *r,
1251 const dav_resource *resource,
1255 DAV_DECLARE(dav_error*) dav_lock_query(dav_lockdb *lockdb,
1256 const dav_resource *resource,
1259 DAV_DECLARE(dav_error *) dav_validate_request(request_rec *r,
1260 dav_resource *resource,
1262 dav_locktoken *locktoken,
1263 dav_response **response,
1265 dav_lockdb *lockdb);
1268 ** 0x0F -- reserved for <dav_lock_scope> values
1270 ** other flags, detailed below
1272 #define DAV_VALIDATE_RESOURCE 0x0010 /* validate just the resource */
1273 #define DAV_VALIDATE_PARENT 0x0020 /* validate resource AND its parent */
1274 #define DAV_VALIDATE_ADD_LD 0x0040 /* add DAV:lockdiscovery into
1275 the 424 DAV:response */
1276 #define DAV_VALIDATE_USE_424 0x0080 /* return 424 status, not 207 */
1277 #define DAV_VALIDATE_IS_PARENT 0x0100 /* for internal use */
1279 /* Lock-null related public lock functions */
1280 DAV_DECLARE(int) dav_get_resource_state(request_rec *r,
1281 const dav_resource *resource);
1283 /* Lock provider hooks. Locking is optional, so there may be no
1284 * lock provider for a given repository.
1286 struct dav_hooks_locks
1288 /* Return the supportedlock property for a resource */
1289 const char * (*get_supportedlock)(
1290 const dav_resource *resource
1293 /* Parse a lock token URI, returning a lock token object allocated
1294 * in the given pool.
1296 dav_error * (*parse_locktoken)(
1298 const char *char_token,
1299 dav_locktoken **locktoken_p
1302 /* Format a lock token object into a URI string, allocated in
1305 * Always returns non-NULL.
1307 const char * (*format_locktoken)(
1309 const dav_locktoken *locktoken
1312 /* Compare two lock tokens.
1314 * Result < 0 => lt1 < lt2
1315 * Result == 0 => lt1 == lt2
1316 * Result > 0 => lt1 > lt2
1318 int (*compare_locktoken)(
1319 const dav_locktoken *lt1,
1320 const dav_locktoken *lt2
1323 /* Open the provider's lock database.
1325 * The provider may or may not use a "real" database for locks
1326 * (a lock could be an attribute on a resource, for example).
1328 * The provider may choose to use the value of the DAVLockDB directive
1329 * (as returned by dav_get_lockdb_path()) to decide where to place
1330 * any storage it may need.
1332 * The request storage pool should be associated with the lockdb,
1333 * so it can be used in subsequent operations.
1335 * If ro != 0, only readonly operations will be performed.
1336 * If force == 0, the open can be "lazy"; no subsequent locking operations
1338 * If force != 0, locking operations will definitely occur.
1340 dav_error * (*open_lockdb)(
1347 /* Indicates completion of locking operations */
1348 void (*close_lockdb)(
1352 /* Take a resource out of the lock-null state. */
1353 dav_error * (*remove_locknull_state)(
1355 const dav_resource *resource
1359 ** Create a (direct) lock structure for the given resource. A locktoken
1362 ** The lock provider may store private information into lock->info.
1364 dav_error * (*create_lock)(dav_lockdb *lockdb,
1365 const dav_resource *resource,
1369 ** Get the locks associated with the specified resource.
1371 ** If resolve_locks is true (non-zero), then any indirect locks are
1372 ** resolved to their actual, direct lock (i.e. the reference to followed
1373 ** to the original lock).
1375 ** The locks, if any, are returned as a linked list in no particular
1376 ** order. If no locks are present, then *locks will be NULL.
1378 dav_error * (*get_locks)(dav_lockdb *lockdb,
1379 const dav_resource *resource,
1383 #define DAV_GETLOCKS_RESOLVED 0 /* resolve indirects to directs */
1384 #define DAV_GETLOCKS_PARTIAL 1 /* leave indirects partially filled */
1385 #define DAV_GETLOCKS_COMPLETE 2 /* fill out indirect locks */
1388 ** Find a particular lock on a resource (specified by its locktoken).
1390 ** *lock will be set to NULL if the lock is not found.
1392 ** Note that the provider can optimize the unmarshalling -- only one
1393 ** lock (or none) must be constructed and returned.
1395 ** If partial_ok is true (non-zero), then an indirect lock can be
1396 ** partially filled in. Otherwise, another lookup is done and the
1397 ** lock structure will be filled out as a DAV_LOCKREC_INDIRECT.
1399 dav_error * (*find_lock)(dav_lockdb *lockdb,
1400 const dav_resource *resource,
1401 const dav_locktoken *locktoken,
1406 ** Quick test to see if the resource has *any* locks on it.
1408 ** This is typically used to determine if a non-existent resource
1409 ** has a lock and is (therefore) a locknull resource.
1411 ** WARNING: this function may return TRUE even when timed-out locks
1412 ** exist (i.e. it may not perform timeout checks).
1414 dav_error * (*has_locks)(dav_lockdb *lockdb,
1415 const dav_resource *resource,
1416 int *locks_present);
1419 ** Append the specified lock(s) to the set of locks on this resource.
1421 ** If "make_indirect" is true (non-zero), then the specified lock(s)
1422 ** should be converted to an indirect lock (if it is a direct lock)
1423 ** before appending. Note that the conversion to an indirect lock does
1424 ** not alter the passed-in lock -- the change is internal the
1425 ** append_locks function.
1427 ** Multiple locks are specified using the lock->next links.
1429 dav_error * (*append_locks)(dav_lockdb *lockdb,
1430 const dav_resource *resource,
1432 const dav_lock *lock);
1435 ** Remove any lock that has the specified locktoken.
1437 ** If locktoken == NULL, then ALL locks are removed.
1439 dav_error * (*remove_lock)(dav_lockdb *lockdb,
1440 const dav_resource *resource,
1441 const dav_locktoken *locktoken);
1444 ** Refresh all locks, found on the specified resource, which has a
1445 ** locktoken in the provided list.
1447 ** If the lock is indirect, then the direct lock is referenced and
1450 ** Each lock that is updated is returned in the <locks> argument.
1451 ** Note that the locks will be fully resolved.
1453 dav_error * (*refresh_locks)(dav_lockdb *lockdb,
1454 const dav_resource *resource,
1455 const dav_locktoken_list *ltl,
1460 ** Look up the resource associated with a particular locktoken.
1462 ** The search begins at the specified <start_resource> and the lock
1463 ** specified by <locktoken>.
1465 ** If the resource/token specifies an indirect lock, then the direct
1466 ** lock will be looked up, and THAT resource will be returned. In other
1467 ** words, this function always returns the resource where a particular
1468 ** lock (token) was asserted.
1470 ** NOTE: this function pointer is allowed to be NULL, indicating that
1471 ** the provider does not support this type of functionality. The
1472 ** caller should then traverse up the repository hierarchy looking
1473 ** for the resource defining a lock with this locktoken.
1475 dav_error * (*lookup_resource)(dav_lockdb *lockdb,
1476 const dav_locktoken *locktoken,
1477 const dav_resource *start_resource,
1478 const dav_resource **resource);
1481 ** If a provider needs a context to associate with this hooks structure,
1482 ** then this field may be used. In most cases, it will just be NULL.
1487 /* what types of resources can be discovered by dav_get_resource_state() */
1488 #define DAV_RESOURCE_LOCK_NULL 10 /* resource lock-null */
1489 #define DAV_RESOURCE_NULL 11 /* resource null */
1490 #define DAV_RESOURCE_EXISTS 12 /* resource exists */
1491 #define DAV_RESOURCE_ERROR 13 /* an error occurred */
1494 /* --------------------------------------------------------------------
1496 ** PROPERTY HANDLING
1499 typedef struct dav_propdb dav_propdb;
1502 DAV_DECLARE(dav_error *) dav_open_propdb(
1505 const dav_resource *resource,
1507 apr_array_header_t *ns_xlate,
1508 dav_propdb **propdb);
1510 DAV_DECLARE(void) dav_close_propdb(dav_propdb *db);
1512 DAV_DECLARE(dav_get_props_result) dav_get_props(
1516 DAV_DECLARE(dav_get_props_result) dav_get_allprops(
1518 dav_prop_insert what);
1520 DAV_DECLARE(void) dav_get_liveprop_supported(
1523 const char *propname,
1524 apr_text_header *body);
1527 ** 3-phase property modification.
1529 ** 1) validate props. readable? unlocked? ACLs allow access?
1530 ** 2) execute operation (set/delete)
1531 ** 3) commit or rollback
1533 ** ### eventually, auth must be available. a ref to the request_rec (which
1534 ** ### contains the auth info) should be in the shared context struct.
1536 ** Each function may alter the error values and information contained within
1537 ** the context record. This should be done as an "increasing" level of
1538 ** error, rather than overwriting any previous error.
1540 ** Note that commit() cannot generate errors. It should simply free the
1541 ** rollback information.
1543 ** rollback() may generate additional errors because the rollback operation
1544 ** can sometimes fail(!).
1546 ** The caller should allocate an array of these, one per operation. It should
1547 ** be zero-initialized, then the db, operation, and prop fields should be
1548 ** filled in before calling dav_prop_validate. Note that the set/delete
1549 ** operations are order-dependent. For a given (logical) context, the same
1550 ** pointer must be passed to each phase.
1552 ** error_type is an internal value, but will have the same numeric value
1553 ** for each possible "desc" value. This allows the caller to group the
1554 ** descriptions via the error_type variable, rather than through string
1555 ** comparisons. Note that "status" does not provide enough granularity to
1556 ** differentiate/group the "desc" values.
1558 ** Note that the propdb will maintain some (global) context across all
1559 ** of the property change contexts. This implies that you can have only
1560 ** one open transaction per propdb.
1562 typedef struct dav_prop_ctx
1567 #define DAV_PROP_OP_SET 1 /* set a property value */
1568 #define DAV_PROP_OP_DELETE 2 /* delete a prop value */
1569 /* ### add a GET? */
1571 apr_xml_elem *prop; /* property to affect */
1573 dav_error *err; /* error (if any) */
1575 /* private items to the propdb */
1578 struct dav_rollback_item *rollback; /* optional rollback info */
1580 /* private to mod_dav.c */
1585 DAV_DECLARE_NONSTD(void) dav_prop_validate(dav_prop_ctx *ctx);
1586 DAV_DECLARE_NONSTD(void) dav_prop_exec(dav_prop_ctx *ctx);
1587 DAV_DECLARE_NONSTD(void) dav_prop_commit(dav_prop_ctx *ctx);
1588 DAV_DECLARE_NONSTD(void) dav_prop_rollback(dav_prop_ctx *ctx);
1590 #define DAV_PROP_CTX_HAS_ERR(dpc) ((dpc).err && (dpc).err->status >= 300)
1593 /* --------------------------------------------------------------------
1599 DAV_CALLTYPE_MEMBER = 1, /* called for a member resource */
1600 DAV_CALLTYPE_COLLECTION, /* called for a collection */
1601 DAV_CALLTYPE_LOCKNULL /* called for a locknull resource */
1606 /* the client-provided context */
1609 /* pool to use for allocations in the callback */
1612 /* the current resource */
1613 const dav_resource *resource;
1615 /* OUTPUT: add responses to this */
1616 dav_response *response;
1618 } dav_walk_resource;
1623 #define DAV_WALKTYPE_AUTH 0x0001 /* limit to authorized files */
1624 #define DAV_WALKTYPE_NORMAL 0x0002 /* walk normal files */
1625 #define DAV_WALKTYPE_LOCKNULL 0x0004 /* walk locknull resources */
1627 /* callback function and a client context for the walk */
1628 dav_error * (*func)(dav_walk_resource *wres, int calltype);
1631 /* what pool to use for allocations needed by walk logic */
1634 /* beginning root of the walk */
1635 const dav_resource *root;
1637 /* lock database to enable walking LOCKNULL resources */
1642 /* directory tree walking context */
1643 typedef struct dav_walker_ctx
1649 /* ### client data... phasing out this big glom */
1651 /* this brigade buffers data being sent to r->output_filters */
1652 apr_bucket_brigade *bb;
1654 /* a scratch pool, used to stream responses and iteratively cleared. */
1655 apr_pool_t *scratchpool;
1657 request_rec *r; /* original request */
1659 /* for PROPFIND operations */
1662 #define DAV_PROPFIND_IS_ALLPROP 1
1663 #define DAV_PROPFIND_IS_PROPNAME 2
1664 #define DAV_PROPFIND_IS_PROP 3
1666 apr_text *propstat_404; /* (cached) propstat giving a 404 error */
1668 const dav_if_header *if_header; /* for validation */
1669 const dav_locktoken *locktoken; /* for UNLOCK */
1670 const dav_lock *lock; /* for LOCK */
1671 int skip_root; /* for dav_inherit_locks() */
1675 dav_buffer work_buf; /* for dav_validate_request() */
1679 DAV_DECLARE(void) dav_add_response(dav_walk_resource *wres,
1681 dav_get_props_result *propstats);
1684 /* --------------------------------------------------------------------
1686 ** "STREAM" STRUCTURE
1688 ** mod_dav uses this abstraction for interacting with the repository
1689 ** while fetching/storing resources. mod_dav views resources as a stream
1692 ** Note that the structure is opaque -- it is private to the repository
1693 ** that created the stream in the repository's "open" function.
1695 ** ### THIS STUFF IS GOING AWAY ... GET/read requests are handled by
1696 ** ### having the provider jam stuff straight into the filter stack.
1697 ** ### this is only left for handling PUT/write requests.
1700 typedef struct dav_stream dav_stream;
1703 DAV_MODE_WRITE_TRUNC, /* truncate and open for writing */
1704 DAV_MODE_WRITE_SEEKABLE /* open for writing; random access */
1708 /* --------------------------------------------------------------------
1710 ** REPOSITORY FUNCTIONS
1713 /* Repository provider hooks */
1714 struct dav_hooks_repository
1716 /* Flag for whether repository requires special GET handling.
1717 * If resources in the repository are not visible in the
1718 * filesystem location which URLs map to, then special handling
1719 * is required to first fetch a resource from the repository,
1720 * respond to the GET request, then free the resource copy.
1724 /* Get a resource descriptor for the URI in a request. A descriptor
1725 * should always be returned even if the resource does not exist. This
1726 * repository has been identified as handling the resource given by
1727 * the URI, so an answer must be given. If there is a problem with the
1728 * URI or accessing the resource or whatever, then an error should be
1732 * the root of the directory for which this repository is configured.
1735 * if a Label: header is present (and allowed), this is the label
1736 * to use to identify a version resource from the resource's
1737 * corresponding version history. Otherwise, it will be NULL.
1740 * use the DAV:checked-in property of the resource identified by the
1741 * Request-URI to identify and return a version resource
1743 * The provider may associate the request storage pool with the resource
1744 * (in the resource->pool field), to use in other operations on that
1747 dav_error * (*get_resource)(
1749 const char *root_dir,
1752 dav_resource **resource
1755 /* Get a resource descriptor for the parent of the given resource.
1756 * The resources need not exist. NULL is returned if the resource
1757 * is the root collection.
1759 * An error should be returned only if there is a fatal error in
1760 * fetching information about the parent resource.
1762 dav_error * (*get_parent_resource)(
1763 const dav_resource *resource,
1764 dav_resource **parent_resource
1767 /* Determine whether two resource descriptors refer to the same resource.
1769 * Result != 0 => the resources are the same.
1771 int (*is_same_resource)(
1772 const dav_resource *res1,
1773 const dav_resource *res2
1776 /* Determine whether one resource is a parent (immediate or otherwise)
1779 * Result != 0 => res1 is a parent of res2.
1781 int (*is_parent_resource)(
1782 const dav_resource *res1,
1783 const dav_resource *res2
1787 ** Open a stream for this resource, using the specified mode. The
1788 ** stream will be returned in *stream.
1790 dav_error * (*open_stream)(const dav_resource *resource,
1791 dav_stream_mode mode,
1792 dav_stream **stream);
1795 ** Close the specified stream.
1797 ** mod_dav will (ideally) make sure to call this. For safety purposes,
1798 ** a provider should (ideally) register a cleanup function with the
1799 ** request pool to get this closed and cleaned up.
1801 ** Note the possibility of an error from the close -- it is entirely
1802 ** feasible that the close does a "commit" of some kind, which can
1803 ** produce an error.
1805 ** commit should be TRUE (non-zero) or FALSE (0) if the stream was
1806 ** opened for writing. This flag states whether to retain the file
1808 ** Note: the commit flag is ignored for streams opened for reading.
1810 dav_error * (*close_stream)(dav_stream *stream, int commit);
1813 ** Write data to the stream.
1815 ** All of the bytes must be written, or an error should be returned.
1817 dav_error * (*write_stream)(dav_stream *stream,
1818 const void *buf, apr_size_t bufsize);
1821 ** Seek to an absolute position in the stream. This is used to support
1822 ** Content-Range in a GET/PUT.
1824 ** NOTE: if this function is NULL (which is allowed), then any
1825 ** operations using Content-Range will be refused.
1827 dav_error * (*seek_stream)(dav_stream *stream, apr_off_t abs_position);
1830 ** If a GET is processed using a stream (open_stream, read_stream)
1831 ** rather than via a sub-request (on get_pathname), then this function
1832 ** is used to provide the repository with a way to set the headers
1835 ** This function may be called without a following deliver(), to
1836 ** handle a HEAD request.
1838 ** This may be NULL if handle_get is FALSE.
1840 dav_error * (*set_headers)(request_rec *r,
1841 const dav_resource *resource);
1844 ** The provider should deliver the resource into the specified filter.
1845 ** Basically, this is the response to the GET method.
1847 ** Note that this is called for all resources, including collections.
1848 ** The provider should determine what has content to deliver or not.
1850 ** set_headers will be called prior to this function, allowing the
1851 ** provider to set the appropriate response headers.
1853 ** This may be NULL if handle_get is FALSE.
1854 ** ### maybe toss handle_get and just use this function as the marker
1856 dav_error * (*deliver)(const dav_resource *resource,
1857 ap_filter_t *output);
1859 /* Create a collection resource. The resource must not already exist.
1861 * Result == NULL if the collection was created successfully. Also, the
1862 * resource object is updated to reflect that the resource exists, and
1865 dav_error * (*create_collection)(
1866 dav_resource *resource
1869 /* Copy one resource to another. The destination may exist, if it is
1871 * Handles both files and collections. Properties are copied as well.
1872 * If the destination exists and is versioned, the provider must update
1873 * the destination to have identical content to the source,
1874 * recursively for collections.
1875 * The depth argument is ignored for a file, and can be either 0 or
1876 * DAV_INFINITY for a collection.
1877 * If an error occurs in a child resource, then the return value is
1878 * non-NULL, and *response is set to a multistatus response.
1879 * If the copy is successful, the dst resource object is
1880 * updated to reflect that the resource exists.
1882 dav_error * (*copy_resource)(
1883 const dav_resource *src,
1886 dav_response **response
1889 /* Move one resource to another. The destination must not exist.
1890 * Handles both files and collections. Properties are moved as well.
1891 * If an error occurs in a child resource, then the return value is
1892 * non-NULL, and *response is set to a multistatus response.
1893 * If the move is successful, the src and dst resource objects are
1894 * updated to reflect that the source no longer exists, and the
1897 dav_error * (*move_resource)(
1900 dav_response **response
1903 /* Remove a resource. Handles both files and collections.
1904 * Removes any associated properties as well.
1905 * If an error occurs in a child resource, then the return value is
1906 * non-NULL, and *response is set to a multistatus response.
1907 * If the delete is successful, the resource object is updated to
1908 * reflect that the resource no longer exists.
1910 dav_error * (*remove_resource)(
1911 dav_resource *resource,
1912 dav_response **response
1915 /* Walk a resource hierarchy.
1917 * Iterates over the resource hierarchy specified by params->root.
1918 * Control of the walk and the callback are specified by 'params'.
1920 * An error may be returned. *response will contain multistatus
1921 * responses (if any) suitable for the body of the error. It is also
1922 * possible to return NULL, yet still have multistatus responses.
1923 * In this case, typically the caller should return a 207 (Multistatus)
1924 * and the responses (in the body) as the HTTP response.
1926 dav_error * (*walk)(const dav_walk_params *params, int depth,
1927 dav_response **response);
1929 /* Get the entity tag for a resource */
1930 const char * (*getetag)(const dav_resource *resource);
1933 ** If a provider needs a context to associate with this hooks structure,
1934 ** then this field may be used. In most cases, it will just be NULL.
1940 /* --------------------------------------------------------------------
1942 ** VERSIONING FUNCTIONS
1946 /* dav_add_vary_header
1948 * If there were any headers in the request which require a Vary header
1949 * in the response, add it.
1951 DAV_DECLARE(void) dav_add_vary_header(request_rec *in_req,
1952 request_rec *out_req,
1953 const dav_resource *resource);
1956 ** Flags specifying auto-versioning behavior, returned by
1957 ** the auto_versionable hook. The value returned depends
1958 ** on both the state of the resource and the value of the
1959 ** DAV:auto-versioning property for the resource.
1961 ** If the resource does not exist (null or lock-null),
1962 ** DAV_AUTO_VERSION_ALWAYS causes creation of a new version-controlled resource
1964 ** If the resource is checked in,
1965 ** DAV_AUTO_VERSION_ALWAYS causes it to be checked out always,
1966 ** DAV_AUTO_VERSION_LOCKED causes it to be checked out only when locked
1968 ** If the resource is checked out,
1969 ** DAV_AUTO_VERSION_ALWAYS causes it to be checked in always,
1970 ** DAV_AUTO_VERSION_LOCKED causes it to be checked in when unlocked
1971 ** (note: a provider should allow auto-checkin only for resources which
1972 ** were automatically checked out)
1974 ** In all cases, DAV_AUTO_VERSION_NEVER results in no auto-versioning behavior.
1977 DAV_AUTO_VERSION_NEVER,
1978 DAV_AUTO_VERSION_ALWAYS,
1979 DAV_AUTO_VERSION_LOCKED
1983 ** This structure is used to record what auto-versioning operations
1984 ** were done to make a resource writable, so that they can be undone
1985 ** at the end of a request.
1988 int resource_versioned; /* 1 => resource was auto-version-controlled */
1989 int resource_checkedout; /* 1 => resource was auto-checked-out */
1990 int parent_checkedout; /* 1 => parent was auto-checked-out */
1991 dav_resource *parent_resource; /* parent resource, if it was needed */
1992 } dav_auto_version_info;
1994 /* Ensure that a resource is writable. If there is no versioning
1995 * provider, then this is essentially a no-op. Versioning repositories
1996 * require explicit resource creation and checkout before they can
1997 * be written to. If a new resource is to be created, or an existing
1998 * resource deleted, the parent collection must be checked out as well.
2000 * Set the parent_only flag to only make the parent collection writable.
2001 * Otherwise, both parent and child are made writable as needed. If the
2002 * child does not exist, then a new versioned resource is created and
2005 * If auto-versioning is not enabled for a versioned resource, then an error is
2006 * returned, since the resource cannot be modified.
2008 * The dav_auto_version_info structure is filled in with enough information
2009 * to restore both parent and child resources to the state they were in
2010 * before the auto-versioning operations occurred.
2012 DAV_DECLARE(dav_error *) dav_auto_checkout(
2014 dav_resource *resource,
2016 dav_auto_version_info *av_info);
2018 /* Revert the writability of resources back to what they were
2019 * before they were modified. If undo == 0, then the resource
2020 * modifications are maintained (i.e. they are checked in).
2021 * If undo != 0, then resource modifications are discarded
2022 * (i.e. they are unchecked out).
2024 * Set the unlock flag to indicate that the resource is about
2025 * to be unlocked; it will be checked in if the resource
2026 * auto-versioning property indicates it should be. In this case,
2027 * av_info is ignored, so it can be NULL.
2029 * The resource argument may be NULL if only the parent resource
2030 * was checked out (i.e. the parent_only was != 0 in the
2031 * dav_auto_checkout call).
2033 DAV_DECLARE(dav_error *) dav_auto_checkin(
2035 dav_resource *resource,
2038 dav_auto_version_info *av_info);
2041 ** This structure is used to describe available reports
2043 ** "nmspace" should be valid XML and URL-quoted. mod_dav will place
2044 ** double-quotes around it and use it in an xmlns declaration.
2047 const char *nmspace; /* namespace of the XML report element */
2048 const char *name; /* element name for the XML report */
2052 /* Versioning provider hooks */
2053 struct dav_hooks_vsn
2057 ** The following hooks are mandatory for all versioning providers;
2058 ** they define the functionality needed to implement "core" versioning.
2061 /* Return supported versioning options.
2062 * Each dav_text item in the list will be returned as a separate
2063 * DAV header. Providers are advised to limit the length of an
2064 * individual text item to 63 characters, to conform to the limit
2065 * used by MS Web Folders.
2067 void (*get_vsn_options)(apr_pool_t *p, apr_text_header *phdr);
2069 /* Get the value of a specific option for an OPTIONS request.
2070 * The option being requested is given by the parsed XML
2071 * element object "elem". The value of the option should be
2072 * appended to the "option" text object.
2074 dav_error * (*get_option)(const dav_resource *resource,
2075 const apr_xml_elem *elem,
2076 apr_text_header *option);
2078 /* Determine whether a non-versioned (or non-existent) resource
2079 * is versionable. Returns != 0 if resource can be versioned.
2081 int (*versionable)(const dav_resource *resource);
2083 /* Determine whether auto-versioning is enabled for a resource
2084 * (which may not exist, or may not be versioned). If the resource
2085 * is a checked-out resource, the provider must only enable
2086 * auto-checkin if the resource was automatically checked out.
2088 * The value returned depends on both the state of the resource
2089 * and the value of its DAV:auto-version property. See the description
2090 * of the dav_auto_version enumeration above for the details.
2092 dav_auto_version (*auto_versionable)(const dav_resource *resource);
2094 /* Put a resource under version control. If the resource already
2095 * exists unversioned, then it becomes the initial version of the
2096 * new version history, and it is replaced by a version selector
2097 * which targets the new version.
2099 * If the resource does not exist, then a new version-controlled
2100 * resource is created which either targets an existing version (if the
2101 * "target" argument is not NULL), or the initial, empty version
2102 * in a new history resource (if the "target" argument is NULL).
2104 * If successful, the resource object state is updated appropriately
2105 * (that is, changed to refer to the new version-controlled resource).
2107 dav_error * (*vsn_control)(dav_resource *resource,
2108 const char *target);
2110 /* Checkout a resource. If successful, the resource
2111 * object state is updated appropriately.
2113 * The auto_checkout flag will be set if this checkout is being
2114 * done automatically, as part of some method which modifies
2115 * the resource. The provider must remember that the resource
2116 * was automatically checked out, so it can determine whether it
2117 * can be automatically checked in. (Auto-checkin should only be
2118 * enabled for resources which were automatically checked out.)
2120 * If the working resource has a different URL from the
2121 * target resource, a dav_resource descriptor is returned
2122 * for the new working resource. Otherwise, the original
2123 * resource descriptor will refer to the working resource.
2124 * The working_resource argument can be NULL if the caller
2125 * is not interested in the working resource.
2127 * If the client has specified DAV:unreserved or DAV:fork-ok in the
2128 * checkout request, then the corresponding flags are set. If
2129 * DAV:activity-set has been specified, then create_activity is set
2130 * if DAV:new was specified; otherwise, the DAV:href elements' CDATA
2131 * (the actual href text) is passed in the "activities" array (each
2132 * element of the array is a const char *). activities will be NULL
2133 * no DAV:activity-set was provided or when create_activity is set.
2135 dav_error * (*checkout)(dav_resource *resource,
2137 int is_unreserved, int is_fork_ok,
2138 int create_activity,
2139 apr_array_header_t *activities,
2140 dav_resource **working_resource);
2142 /* Uncheckout a checked-out resource. If successful, the resource
2143 * object state is updated appropriately.
2145 dav_error * (*uncheckout)(dav_resource *resource);
2147 /* Checkin a checked-out resource. If successful, the resource
2148 * object state is updated appropriately, and the
2149 * version_resource descriptor will refer to the new version.
2150 * The version_resource argument can be NULL if the caller
2151 * is not interested in the new version resource.
2153 * If the client has specified DAV:keep-checked-out in the checkin
2154 * request, then the keep_checked_out flag is set. The provider
2155 * should create a new version, but keep the resource in the
2156 * checked-out state.
2158 dav_error * (*checkin)(dav_resource *resource,
2159 int keep_checked_out,
2160 dav_resource **version_resource);
2163 ** Return the set of reports available at this resource.
2165 ** An array of report elements should be returned, with an end-marker
2166 ** element containing namespace==NULL. The value of the
2167 ** DAV:supported-report-set property will be constructed and
2170 dav_error * (*avail_reports)(const dav_resource *resource,
2171 const dav_report_elem **reports);
2174 ** Determine whether a Label header can be used
2175 ** with a particular report. The dav_xml_doc structure
2176 ** contains the parsed report request body.
2177 ** Returns 0 if the Label header is not allowed.
2179 int (*report_label_header_allowed)(const apr_xml_doc *doc);
2182 ** Generate a report on a resource. Since a provider is free
2183 ** to define its own reports, and the value of request headers
2184 ** may affect the interpretation of a report, the request record
2185 ** must be passed to this routine.
2187 ** The dav_xml_doc structure contains the parsed report request
2188 ** body. The report response should be generated into the specified
2191 ** If an error occurs, and a response has not yet been generated,
2192 ** then an error can be returned from this function. mod_dav will
2193 ** construct an appropriate error response. Once some output has
2194 ** been placed into the filter, however, the provider should not
2195 ** return an error -- there is no way that mod_dav can deliver it
2198 ** ### maybe we need a way to signal an error anyways, and then
2199 ** ### apache can abort the connection?
2201 dav_error * (*deliver_report)(request_rec *r,
2202 const dav_resource *resource,
2203 const apr_xml_doc *doc,
2204 ap_filter_t *output);
2208 ** The following hooks are optional; if not defined, then the
2209 ** corresponding protocol methods will be unsupported.
2213 ** Set the state of a checked-in version-controlled resource.
2215 ** If the request specified a version, the version resource
2216 ** represents that version. If the request specified a label,
2217 ** then "version" is NULL, and "label" is the label.
2219 ** The depth argument is ignored for a file, and can be 0, 1, or
2220 ** DAV_INFINITY for a collection. The depth argument only applies
2221 ** with a label, not a version.
2223 ** If an error occurs in a child resource, then the return value is
2224 ** non-NULL, and *response is set to a multistatus response.
2226 ** This hook is optional; if not defined, then the UPDATE method
2227 ** will not be supported.
2229 dav_error * (*update)(const dav_resource *resource,
2230 const dav_resource *version,
2233 dav_response **response);
2236 ** Add a label to a version. The resource is either a specific
2237 ** version, or a version selector, in which case the label should
2238 ** be added to the current target of the version selector. The
2239 ** version selector cannot be checked out.
2241 ** If replace != 0, any existing label by the same name is
2242 ** effectively deleted first. Otherwise, it is an error to
2243 ** attempt to add a label which already exists on some version
2244 ** of the same history resource.
2246 ** This hook is optional; if not defined, then the LABEL method
2247 ** will not be supported. If it is defined, then the remove_label
2248 ** hook must be defined also.
2250 dav_error * (*add_label)(const dav_resource *resource,
2255 ** Remove a label from a version. The resource is either a specific
2256 ** version, or a version selector, in which case the label should
2257 ** be added to the current target of the version selector. The
2258 ** version selector cannot be checked out.
2260 ** It is an error if no such label exists on the specified version.
2262 ** This hook is optional, but if defined, the add_label hook
2263 ** must be defined also.
2265 dav_error * (*remove_label)(const dav_resource *resource,
2269 ** Determine whether a null resource can be created as a workspace.
2270 ** The provider may restrict workspaces to certain locations.
2271 ** Returns 0 if the resource cannot be a workspace.
2273 ** This hook is optional; if the provider does not support workspaces,
2274 ** it should be set to NULL.
2276 int (*can_be_workspace)(const dav_resource *resource);
2279 ** Create a workspace resource. The resource must not already
2280 ** exist. Any <DAV:mkworkspace> element is passed to the provider
2281 ** in the "doc" structure; it may be empty.
2283 ** If workspace creation is succesful, the state of the resource
2284 ** object is updated appropriately.
2286 ** This hook is optional; if the provider does not support workspaces,
2287 ** it should be set to NULL.
2289 dav_error * (*make_workspace)(dav_resource *resource,
2293 ** Determine whether a null resource can be created as an activity.
2294 ** The provider may restrict activities to certain locations.
2295 ** Returns 0 if the resource cannot be an activity.
2297 ** This hook is optional; if the provider does not support activities,
2298 ** it should be set to NULL.
2300 int (*can_be_activity)(const dav_resource *resource);
2303 ** Create an activity resource. The resource must not already
2306 ** If activity creation is succesful, the state of the resource
2307 ** object is updated appropriately.
2309 ** This hook is optional; if the provider does not support activities,
2310 ** it should be set to NULL.
2312 dav_error * (*make_activity)(dav_resource *resource);
2315 ** Merge a resource (tree) into target resource (tree).
2319 ** This hook is optional; if the provider does not support merging,
2320 ** then this should be set to NULL.
2322 dav_error * (*merge)(dav_resource *target, dav_resource *source,
2323 int no_auto_merge, int no_checkout,
2324 apr_xml_elem *prop_elem,
2325 ap_filter_t *output);
2328 ** If a provider needs a context to associate with this hooks structure,
2329 ** then this field may be used. In most cases, it will just be NULL.
2335 /* --------------------------------------------------------------------
2337 ** BINDING FUNCTIONS
2340 /* binding provider hooks */
2341 struct dav_hooks_binding {
2343 /* Determine whether a resource can be the target of a binding.
2344 * Returns 0 if the resource cannot be a binding target.
2346 int (*is_bindable)(const dav_resource *resource);
2348 /* Create a binding to a resource.
2349 * The resource argument is the target of the binding;
2350 * the binding argument must be a resource which does not already
2353 dav_error * (*bind_resource)(const dav_resource *resource,
2354 dav_resource *binding);
2357 ** If a provider needs a context to associate with this hooks structure,
2358 ** then this field may be used. In most cases, it will just be NULL.
2365 /* --------------------------------------------------------------------
2367 ** SEARCH(DASL) FUNCTIONS
2370 /* search provider hooks */
2371 struct dav_hooks_search {
2372 /* Set header for a OPTION method
2373 * An error may be returned.
2374 * To set a hadder, this function might call
2375 * apr_table_setn(r->headers_out, "DASL", dasl_optin1);
2378 * DASL: <DAV:basicsearch>
2379 * DASL: <http://foo.bar.com/syntax1>
2380 * DASL: <http://akuma.com/syntax2>
2382 dav_error * (*set_option_head)(request_rec *r);
2385 * An error may be returned. *response will contain multistatus
2386 * responses (if any) suitable for the body of the error. It is also
2387 * possible to return NULL, yet still have multistatus responses.
2388 * In this case, typically the caller should return a 207 (Multistatus)
2389 * and the responses (in the body) as the HTTP response.
2391 dav_error * (*search_resource)(request_rec *r,
2392 dav_response **response);
2395 ** If a provider needs a context to associate with this hooks structure,
2396 ** then this field may be used. In most cases, it will just be NULL.
2403 /* --------------------------------------------------------------------
2405 ** MISCELLANEOUS STUFF
2408 /* fetch the "LimitXMLRequestBody" in force for this resource */
2409 DAV_DECLARE(apr_size_t) dav_get_limit_xml_body(const request_rec *r);
2412 int propid; /* live property ID */
2413 const dav_hooks_liveprop *provider; /* the provider defining this prop */
2420 #endif /* _MOD_DAV_H_ */