locks.c

subversion-1.4.3-1.tar.gz 配置svn的源码

/*
 * locks.c :  entry point for locking RA functions for ra_serf
 *
 * ====================================================================
 * Copyright (c) 2006 CollabNet.  All rights reserved.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution.  The terms
 * are also available at http://subversion.tigris.org/license-1.html.
 * If newer versions of this license are posted there, you may use a
 * newer version instead, at your option.
 *
 * This software consists of voluntary contributions made by many
 * individuals.  For exact contribution history, see the revision
 * history and logs, available at http://subversion.tigris.org/.
 * ====================================================================
 */



#include <apr_uri.h>

#include <expat.h>

#include <serf.h>

#include "svn_pools.h"
#include "svn_ra.h"
#include "svn_dav.h"
#include "svn_xml.h"
#include "../libsvn_ra/ra_loader.h"
#include "svn_config.h"
#include "svn_delta.h"
#include "svn_version.h"
#include "svn_path.h"
#include "svn_time.h"
#include "svn_private_config.h"

#include "ra_serf.h"


/*
 * This enum represents the current state of our XML parsing for a REPORT.
 */
typedef enum {
  NONE = 0,
  PROP,
  LOCK_DISCOVERY,
  ACTIVE_LOCK,
  LOCK_TYPE,
  LOCK_SCOPE,
  DEPTH,
  TIMEOUT,
  LOCK_TOKEN,
  COMMENT,
} lock_state_e;

typedef struct {
  const char *data;
  apr_size_t len;
} lock_prop_info_t;

typedef struct {
  apr_pool_t *pool;

  const char *path;

  svn_lock_t *lock;

  svn_boolean_t force;
  svn_revnum_t revision;

  svn_boolean_t read_headers;

  /* Our HTTP status code and reason. */
  int status_code;
  const char *reason;

  /* The currently collected value as we build it up */
  const char *tmp;
  apr_size_t tmp_len;

  /* are we done? */
  svn_boolean_t done;

  /* Any errors. */
  svn_error_t *error;
} lock_info_t;


static lock_prop_info_t*
push_state(svn_ra_serf__xml_parser_t *parser,
           lock_info_t *lock_ctx,
           lock_state_e state)
{
  svn_ra_serf__xml_push_state(parser, state);
  switch (state)
    {
    case LOCK_TYPE:
    case LOCK_SCOPE:
    case DEPTH:
    case TIMEOUT:
    case LOCK_TOKEN:
    case COMMENT:
        parser->state->private = apr_pcalloc(parser->state->pool,
                                             sizeof(lock_prop_info_t));
        break;
      default:
        break;
    }

  return parser->state->private;
}

/*
 * Expat callback invoked on a start element tag for a PROPFIND response.
 */
static svn_error_t *
start_lock(svn_ra_serf__xml_parser_t *parser,
           void *userData,
           svn_ra_serf__dav_props_t name,
           const char **attrs)
{
  lock_info_t *ctx = userData;
  lock_state_e state;

  state = parser->state->current_state;

  if (state == NONE && strcmp(name.name, "prop") == 0)
    {
      svn_ra_serf__xml_push_state(parser, PROP);
    }
  else if (state == PROP &&
           strcmp(name.name, "lockdiscovery") == 0)
    {
      push_state(parser, ctx, LOCK_DISCOVERY);
    }
  else if (state == LOCK_DISCOVERY &&
           strcmp(name.name, "activelock") == 0)
    {
      push_state(parser, ctx, ACTIVE_LOCK);
    }
  else if (state == ACTIVE_LOCK)
    {
      if (strcmp(name.name, "locktype") == 0)
        {
          push_state(parser, ctx, LOCK_TYPE);
        }
      else if (strcmp(name.name, "lockscope") == 0)
        {
          push_state(parser, ctx, LOCK_SCOPE);
        }
      else if (strcmp(name.name, "depth") == 0)
        {
          push_state(parser, ctx, DEPTH);
        }
      else if (strcmp(name.name, "timeout") == 0)
        {
          push_state(parser, ctx, TIMEOUT);
        }
      else if (strcmp(name.name, "locktoken") == 0)
        {
          push_state(parser, ctx, LOCK_TOKEN);
        }
      else if (strcmp(name.name, "owner") == 0)
        {
          push_state(parser, ctx, COMMENT);
        }
    }
  else if (state == LOCK_TYPE)
    {
      if (strcmp(name.name, "write") == 0)
        {
          /* Do nothing. */
        }
      else
        {
          abort();
        }
    }
  else if (state == LOCK_SCOPE)
    {
      if (strcmp(name.name, "exclusive") == 0)
        {
          /* Do nothing. */
        }
      else
        {
          abort();
        }
    }

  return SVN_NO_ERROR;
}

/*
 * Expat callback invoked on an end element tag for a PROPFIND response.
 */
static svn_error_t *
end_lock(svn_ra_serf__xml_parser_t *parser,
         void *userData,
         svn_ra_serf__dav_props_t name)
{
  lock_info_t *ctx = userData;
  lock_state_e state;

  state = parser->state->current_state;

  if (state == PROP &&
      strcmp(name.name, "prop") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == LOCK_DISCOVERY &&
           strcmp(name.name, "lockdiscovery") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == ACTIVE_LOCK &&
           strcmp(name.name, "activelock") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == LOCK_TYPE &&
           strcmp(name.name, "locktype") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == LOCK_SCOPE &&
           strcmp(name.name, "lockscope") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == DEPTH &&
           strcmp(name.name, "depth") == 0)
    {
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == TIMEOUT &&
           strcmp(name.name, "timeout") == 0)
    {
      lock_prop_info_t *info = parser->state->private;

      if (strcmp(info->data, "Infinite") == 0)
        {
          ctx->lock->expiration_date = 0;
        }
      else
        {
          SVN_ERR(svn_time_from_cstring(&ctx->lock->creation_date,
                                        info->data, ctx->pool));
        }
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == LOCK_TOKEN &&
           strcmp(name.name, "locktoken") == 0)
    {
      lock_prop_info_t *info = parser->state->private;

      if (!ctx->lock->token && info->len)
        {
          apr_collapse_spaces((char*)info->data, info->data);
          ctx->lock->token = apr_pstrndup(ctx->pool, info->data, info->len);
        }
      /* We don't actually need the lock token. */
      svn_ra_serf__xml_pop_state(parser);
    }
  else if (state == COMMENT &&
           strcmp(name.name, "owner") == 0)
    {
      lock_prop_info_t *info = parser->state->private;

      if (info->len)
        {
          ctx->lock->comment = apr_pstrndup(ctx->pool, info->data, info->len);
        }
      svn_ra_serf__xml_pop_state(parser);
    }

  return SVN_NO_ERROR;
}

static svn_error_t *
cdata_lock(svn_ra_serf__xml_parser_t *parser,
           void *userData,
           const char *data,
           apr_size_t len)
{
  lock_info_t *lock_ctx = userData;
  lock_state_e state;
  lock_prop_info_t *info;

  state = parser->state->current_state;
  info = parser->state->private;

  switch (state)
    {
    case LOCK_TYPE:
    case LOCK_SCOPE:
    case DEPTH:
    case TIMEOUT:
    case LOCK_TOKEN:
    case COMMENT:
        svn_ra_serf__expand_string(&info->data, &info->len,
                                   data, len, parser->state->pool);
        break;
      default:
        break;
    }

  return SVN_NO_ERROR;
}

static const svn_ra_serf__dav_props_t lock_props[] =
{
  { "DAV:", "lockdiscovery" },
  { NULL }
};

static apr_status_t
set_lock_headers(serf_bucket_t *headers,
                 void *baton,
                 apr_pool_t *pool)
{
  lock_info_t *lock_ctx = baton;

  if (lock_ctx->force == TRUE)
    {
      serf_bucket_headers_set(headers, SVN_DAV_OPTIONS_HEADER,
                              SVN_DAV_OPTION_LOCK_STEAL);
    }

  if (SVN_IS_VALID_REVNUM(lock_ctx->revision))
    {
      serf_bucket_headers_set(headers, SVN_DAV_VERSION_NAME_HEADER,
                              apr_ltoa(pool, lock_ctx->revision));
    }

  return APR_SUCCESS;
}

static apr_status_t
handle_lock(serf_request_t *request,
            serf_bucket_t *response,
            void *handler_baton,
            apr_pool_t *pool)
{
  svn_ra_serf__xml_parser_t *xml_ctx = handler_baton;
  lock_info_t *ctx = xml_ctx->user_data;
  apr_status_t status;

  if (ctx->read_headers == FALSE)
    {
      serf_bucket_t *headers;
      const char *val;

      serf_status_line sl;
      apr_status_t rv;

      rv = serf_bucket_response_status(response, &sl);

      ctx->status_code = sl.code;
      ctx->reason = sl.reason;