?? mod_dav.h
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/* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/*
** DAV extension module for Apache 2.0.*
*/
#ifndef _MOD_DAV_H_
#define _MOD_DAV_H_
#include "apr_hooks.h"
#include "apr_hash.h"
#include "apr_dbm.h"
#include "apr_tables.h"
#include "httpd.h"
#include "util_filter.h"
#include "util_xml.h"
#include <limits.h> /* for INT_MAX */
#include <time.h> /* for time_t */
#ifdef __cplusplus
extern "C" {
#endif
#define DAV_VERSION AP_SERVER_BASEREVISION
#define DAV_XML_HEADER "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
#define DAV_XML_CONTENT_TYPE "text/xml; charset=\"utf-8\""
#define DAV_READ_BLOCKSIZE 2048 /* used for reading input blocks */
#define DAV_RESPONSE_BODY_1 "<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\n<html><head>\n<title>"
#define DAV_RESPONSE_BODY_2 "</title>\n</head><body>\n<h1>"
#define DAV_RESPONSE_BODY_3 "</h1>\n<p>"
#define DAV_RESPONSE_BODY_4 "</p>\n"
#define DAV_RESPONSE_BODY_5 "</body></html>\n"
#define DAV_DO_COPY 0
#define DAV_DO_MOVE 1
#if 1
#define DAV_DEBUG 1
#define DEBUG_CR "\n"
#define DBG0(f) ap_log_error(APLOG_MARK, \
APLOG_ERR, 0, NULL, (f))
#define DBG1(f,a1) ap_log_error(APLOG_MARK, \
APLOG_ERR, 0, NULL, f, a1)
#define DBG2(f,a1,a2) ap_log_error(APLOG_MARK, \
APLOG_ERR, 0, NULL, f, a1, a2)
#define DBG3(f,a1,a2,a3) ap_log_error(APLOG_MARK, \
APLOG_ERR, 0, NULL, f, a1, a2, a3)
#else
#undef DAV_DEBUG
#define DEBUG_CR ""
#endif
#define DAV_INFINITY INT_MAX /* for the Depth: header */
/* Create a set of DAV_DECLARE(type), DAV_DECLARE_NONSTD(type) and
* DAV_DECLARE_DATA with appropriate export and import tags for the platform
*/
#if !defined(WIN32)
#define DAV_DECLARE(type) type
#define DAV_DECLARE_NONSTD(type) type
#define DAV_DECLARE_DATA
#elif defined(DAV_DECLARE_STATIC)
#define DAV_DECLARE(type) type __stdcall
#define DAV_DECLARE_NONSTD(type) type
#define DAV_DECLARE_DATA
#elif defined(DAV_DECLARE_EXPORT)
#define DAV_DECLARE(type) __declspec(dllexport) type __stdcall
#define DAV_DECLARE_NONSTD(type) __declspec(dllexport) type
#define DAV_DECLARE_DATA __declspec(dllexport)
#else
#define DAV_DECLARE(type) __declspec(dllimport) type __stdcall
#define DAV_DECLARE_NONSTD(type) __declspec(dllimport) type
#define DAV_DECLARE_DATA __declspec(dllimport)
#endif
/* --------------------------------------------------------------------
**
** ERROR MANAGEMENT
*/
/*
** dav_error structure.
**
** In most cases, mod_dav uses a pointer to a dav_error structure. If the
** pointer is NULL, then no error has occurred.
**
** In certain cases, a dav_error structure is directly used. In these cases,
** a status value of 0 means that an error has not occurred.
**
** Note: this implies that status != 0 whenever an error occurs.
**
** The desc field is optional (it may be NULL). When NULL, it typically
** implies that Apache has a proper description for the specified status.
*/
typedef struct dav_error {
int status; /* suggested HTTP status (0 for no error) */
int error_id; /* DAV-specific error ID */
const char *desc; /* DAV:responsedescription and error log */
int save_errno; /* copy of errno causing the error */
const char *namespace; /* [optional] namespace of error */
const char *tagname; /* name of error-tag */
struct dav_error *prev; /* previous error (in stack) */
} dav_error;
/*
** Create a new error structure. save_errno will be filled with the current
** errno value.
*/
DAV_DECLARE(dav_error*) dav_new_error(apr_pool_t *p, int status,
int error_id, const char *desc);
/*
** Create a new error structure with tagname and (optional) namespace;
** namespace may be NULL, which means "DAV:". save_errno will be
** filled with the current errno value.
*/
DAV_DECLARE(dav_error*) dav_new_error_tag(apr_pool_t *p, int status,
int error_id, const char *desc,
const char *namespace,
const char *tagname);
/*
** Push a new error description onto the stack of errors.
**
** This function is used to provide an additional description to an existing
** error.
**
** <status> should contain the caller's view of what the current status is,
** given the underlying error. If it doesn't have a better idea, then the
** caller should pass prev->status.
**
** <error_id> can specify a new error_id since the topmost description has
** changed.
*/
DAV_DECLARE(dav_error*) dav_push_error(apr_pool_t *p, int status, int error_id,
const char *desc, dav_error *prev);
/* error ID values... */
/* IF: header errors */
#define DAV_ERR_IF_PARSE 100 /* general parsing error */
#define DAV_ERR_IF_MULTIPLE_NOT 101 /* multiple "Not" found */
#define DAV_ERR_IF_UNK_CHAR 102 /* unknown char in header */
#define DAV_ERR_IF_ABSENT 103 /* no locktokens given */
#define DAV_ERR_IF_TAGGED 104 /* in parsing tagged-list */
#define DAV_ERR_IF_UNCLOSED_PAREN 105 /* in no-tagged-list */
/* Prop DB errors */
#define DAV_ERR_PROP_BAD_MAJOR 200 /* major version was wrong */
#define DAV_ERR_PROP_READONLY 201 /* prop is read-only */
#define DAV_ERR_PROP_NO_DATABASE 202 /* writable db not avail */
#define DAV_ERR_PROP_NOT_FOUND 203 /* prop not found */
#define DAV_ERR_PROP_BAD_LOCKDB 204 /* could not open lockdb */
#define DAV_ERR_PROP_OPENING 205 /* problem opening propdb */
#define DAV_ERR_PROP_EXEC 206 /* problem exec'ing patch */
/* Predefined DB errors */
/* ### any to define?? */
/* Predefined locking system errors */
#define DAV_ERR_LOCK_OPENDB 400 /* could not open lockdb */
#define DAV_ERR_LOCK_NO_DB 401 /* no database defined */
#define DAV_ERR_LOCK_CORRUPT_DB 402 /* DB is corrupt */
#define DAV_ERR_LOCK_UNK_STATE_TOKEN 403 /* unknown State-token */
#define DAV_ERR_LOCK_PARSE_TOKEN 404 /* bad opaquelocktoken */
#define DAV_ERR_LOCK_SAVE_LOCK 405 /* err saving locks */
/*
** Some comments on Error ID values:
**
** The numbers do not necessarily need to be unique. Uniqueness simply means
** that two errors that have not been predefined above can be distinguished
** from each other. At the moment, mod_dav does not use this distinguishing
** feature, but it could be used in the future to collapse <response> elements
** into groups based on the error ID (and associated responsedescription).
**
** If a compute_desc is provided, then the error ID should be unique within
** the context of the compute_desc function (so the function can figure out
** what to filled into the desc).
**
** Basically, subsystems can ignore defining new error ID values if they want
** to. The subsystems *do* need to return the predefined errors when
** appropriate, so that mod_dav can figure out what to do. Subsystems can
** simply leave the error ID field unfilled (zero) if there isn't an error
** that must be placed there.
*/
/* --------------------------------------------------------------------
**
** HOOK STRUCTURES
**
** These are here for forward-declaration purposes. For more info, see
** the section title "HOOK HANDLING" for more information, plus each
** structure definition.
*/
/* forward-declare this structure */
typedef struct dav_hooks_propdb dav_hooks_propdb;
typedef struct dav_hooks_locks dav_hooks_locks;
typedef struct dav_hooks_vsn dav_hooks_vsn;
typedef struct dav_hooks_repository dav_hooks_repository;
typedef struct dav_hooks_liveprop dav_hooks_liveprop;
typedef struct dav_hooks_binding dav_hooks_binding;
typedef struct dav_hooks_search dav_hooks_search;
/* ### deprecated name */
typedef dav_hooks_propdb dav_hooks_db;
/* --------------------------------------------------------------------
**
** RESOURCE HANDLING
*/
/*
** Resource Types:
** The base protocol defines only file and collection resources.
** The versioning protocol defines several additional resource types
** to represent artifacts of a version control system.
**
** This enumeration identifies the type of URL used to identify the
** resource. Since the same resource may have more than one type of
** URL which can identify it, dav_resource_type cannot be used
** alone to determine the type of the resource; attributes of the
** dav_resource object must also be consulted.
*/
typedef enum {
DAV_RESOURCE_TYPE_UNKNOWN,
DAV_RESOURCE_TYPE_REGULAR, /* file or collection; could be
* unversioned, or version selector,
* or baseline selector */
DAV_RESOURCE_TYPE_VERSION, /* version or baseline URL */
DAV_RESOURCE_TYPE_HISTORY, /* version or baseline history URL */
DAV_RESOURCE_TYPE_WORKING, /* working resource URL */
DAV_RESOURCE_TYPE_WORKSPACE, /* workspace URL */
DAV_RESOURCE_TYPE_ACTIVITY, /* activity URL */
DAV_RESOURCE_TYPE_PRIVATE /* repository-private type */
} dav_resource_type;
/*
** Opaque, repository-specific information for a resource.
*/
typedef struct dav_resource_private dav_resource_private;
/*
** Resource descriptor, generated by a repository provider.
**
** Note: the lock-null state is not explicitly represented here,
** since it may be expensive to compute. Use dav_get_resource_state()
** to determine whether a non-existent resource is a lock-null resource.
**
** A quick explanation of how the flags can apply to different resources:
**
** unversioned file or collection:
** type = DAV_RESOURCE_TYPE_REGULAR
** exists = ? (1 if exists)
** collection = ? (1 if collection)
** versioned = 0
** baselined = 0
** working = 0
**
** version-controlled resource or configuration:
** type = DAV_RESOURCE_TYPE_REGULAR
** exists = 1
** collection = ? (1 if collection)
** versioned = 1
** baselined = ? (1 if configuration)
** working = ? (1 if checked out)
**
** version/baseline history:
** type = DAV_RESOURCE_TYPE_HISTORY
** exists = 1
** collection = 0
** versioned = 0
** baselined = 0
** working = 0
**
** version/baseline:
** type = DAV_RESOURCE_TYPE_VERSION
** exists = 1
** collection = ? (1 if collection)
** versioned = 1
** baselined = ? (1 if baseline)
** working = 0
**
** working resource:
** type = DAV_RESOURCE_TYPE_WORKING
** exists = 1
** collection = ? (1 if collection)
** versioned = 1
** baselined = 0
** working = 1
**
** workspace:
** type = DAV_RESOURCE_TYPE_WORKSPACE
** exists = ? (1 if exists)
** collection = 1
** versioned = ? (1 if version-controlled)
** baselined = ? (1 if baseline-controlled)
** working = ? (1 if checked out)
**
** activity:
** type = DAV_RESOURCE_TYPE_ACTIVITY
** exists = ? (1 if exists)
** collection = 0
** versioned = 0
** baselined = 0
** working = 0
*/
typedef struct dav_resource {
dav_resource_type type;
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