repos.c

linux subdivision ying gai ke yi le ba

  return NULL;
}

static dav_error * dav_svn_prep_activity(dav_resource_combined *comb)
{
  const char *txn_name = dav_svn_get_txn(comb->priv.repos,
                                         comb->priv.root.activity_id);

  comb->priv.root.txn_name = txn_name;
  comb->res.exists = txn_name != NULL;

  return NULL;
}

static dav_error * dav_svn_prep_private(dav_resource_combined *comb)
{
  if (comb->priv.restype == DAV_SVN_RESTYPE_VCC)
    {
      /* ### what to do */
    }
  /* else nothing to do (### for now) */

  return NULL;
}

static const struct res_type_handler
{
  dav_resource_type type;
  dav_error * (*prep)(dav_resource_combined *comb);

} res_type_handlers[] =
{
  /* skip UNKNOWN */
  { DAV_RESOURCE_TYPE_REGULAR, dav_svn_prep_regular },
  { DAV_RESOURCE_TYPE_VERSION, dav_svn_prep_version },
  { DAV_RESOURCE_TYPE_HISTORY, dav_svn_prep_history },
  { DAV_RESOURCE_TYPE_WORKING, dav_svn_prep_working },
  /* skip WORKSPACE */
  { DAV_RESOURCE_TYPE_ACTIVITY, dav_svn_prep_activity },
  { DAV_RESOURCE_TYPE_PRIVATE, dav_svn_prep_private },

  { 0, NULL }   /* sentinel */
};

/*
** ### docco...
**
** Set .exists and .collection
** open other, internal bits...
*/
static dav_error * dav_svn_prep_resource(dav_resource_combined *comb)
{
  const struct res_type_handler *scan;

  for (scan = res_type_handlers; scan->prep != NULL; ++scan)
    {
      if (comb->res.type == scan->type)
        return (*scan->prep)(comb);
    }

  return dav_new_error(comb->res.pool, HTTP_INTERNAL_SERVER_ERROR, 0,
                       "DESIGN FAILURE: unknown resource type");
}

static dav_resource *dav_svn_create_private_resource(
    const dav_resource *base,
    enum dav_svn_private_restype restype)
{
  dav_resource_combined *comb;
  svn_stringbuf_t *path;
  const struct special_defn *defn;

  for (defn = special_subdirs; defn->name != NULL; ++defn)
    if (defn->restype == restype)
      break;
  /* assert: defn->name != NULL */

  path = svn_stringbuf_createf(base->pool, "/%s/%s",
                            base->info->repos->special_uri, defn->name);

  comb = apr_pcalloc(base->pool, sizeof(*comb));

  /* ### can/should we leverage dav_svn_prep_resource */

  comb->res.type = DAV_RESOURCE_TYPE_PRIVATE;

  comb->res.exists = TRUE;
  comb->res.collection = TRUE;                  /* ### always true? */
  /* versioned = baselined = working = FALSE */

  comb->res.uri = apr_pstrcat(base->pool, base->info->repos->root_path,
                              path->data, NULL);
  comb->res.info = &comb->priv;
  comb->res.hooks = &dav_svn_hooks_repos;
  comb->res.pool = base->pool;

  comb->priv.uri_path = path;
  comb->priv.repos = base->info->repos;
  comb->priv.root.rev = SVN_INVALID_REVNUM;
  return &comb->res;
}

static void log_warning(void *baton, svn_error_t *err)
{
  request_rec *r = baton;

  /* ### hmm. the FS is cleaned up at request cleanup time. "r" might
     ### not really be valid. we should probably put the FS into a
     ### subpool to ensure it gets cleaned before the request.

     ### is there a good way to create and use a subpool for all
     ### of our functions ... ??
  */

  ap_log_rerror(APLOG_MARK, APLOG_ERR, APR_EGENERAL, r, "%s", err->message);
}


AP_MODULE_DECLARE(dav_error *)
dav_svn_split_uri (request_rec *r,
                   const char *uri_to_split,
                   const char *root_path,
                   const char **cleaned_uri,
                   int *trailing_slash,
                   const char **repos_name,
                   const char **relative_path,
                   const char **repos_path)
{
  apr_size_t len1;
  int had_slash;
  const char *fs_path;
  const char *fs_parent_path;
  const char *relative;
  char *uri;

  /* one of these is NULL, the other non-NULL. */
  fs_path = dav_svn_get_fs_path(r);
  fs_parent_path = dav_svn_get_fs_parent_path(r);

  if ((fs_path == NULL) && (fs_parent_path == NULL))
    {
      /* ### are SVN_ERR_APMOD codes within the right numeric space? */
      return dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
                           SVN_ERR_APMOD_MISSING_PATH_TO_FS,
                           "The server is misconfigured: "
                           "either an SVNPath or SVNParentPath "
                           "directive is required to specify the location "
                           "of this resource's repository.");
    }

  /* make a copy so that we can do some work on it */
  uri = apr_pstrdup(r->pool, uri_to_split);

  /* remove duplicate slashes, and make sure URI has no trailing '/' */
  ap_no2slash(uri);
  len1 = strlen(uri);
  had_slash = (len1 > 0 && uri[len1 - 1] == '/');
  if (len1 > 1 && had_slash)
    uri[len1 - 1] = '\0';
  
  if (had_slash)
    *trailing_slash = TRUE;
  else
    *trailing_slash = FALSE;

  /* return the first item.  */
  *cleaned_uri = apr_pstrdup(r->pool, uri);

  /* The URL space defined by the SVN provider is always a virtual
     space. Construct the path relative to the configured Location
     (root_path). So... the relative location is simply the URL used,
     skipping the root_path.
     
     Note: mod_dav has canonialized root_path. It will not have a trailing
     slash (unless it is "/").

     Note: given a URI of /something and a root of /some, then it is
           impossible to be here (and end up with "thing"). This is simply
           because we control /some and are dispatched to here for its
           URIs. We do not control /something, so we don't get here. Or,
           if we *do* control /something, then it is for THAT root.
  */
  relative = ap_stripprefix(uri, root_path);

  /* We want a leading slash on the path specified by <relative>. This
     will almost always be the case since root_path does not have a trailing
     slash. However, if the root is "/", then the slash will be removed
     from <relative>. Backing up a character will put the leading slash
     back.

     Watch out for the empty string! This can happen when URI == ROOT_PATH.
     We simply turn the path into "/" for this case. */
  if (*relative == '\0')
    relative = "/";
  else if (*relative != '/')
    --relative;
  /* ### need a better name... it isn't "relative" because of the leading
     ### slash. something about SVN-private-path */

  /* Depending on whether SVNPath or SVNParentPath was used, we need
     to compute 'relative' and 'repos_name' differently.  */

  /* Normal case:  the SVNPath command was used to specify a
     particular repository.  */
  if (fs_path != NULL)
    {
      /* the repos_name is the last component of root_path. */
      *repos_name = svn_path_basename(root_path, r->pool); 

      /* 'relative' is already correct for SVNPath; the root_path
         already contains the name of the repository, so relative is
         everything beyond that.  */      
    }

  else
    {
      /* SVNParentPath was used instead: assume the first component of
         'relative' is the name of a repository. */
      const char *magic_component, *magic_end;

      /* A repository name is required here.
         Remember that 'relative' always starts with a "/". */
      if (relative[1] == '\0')
        {
          /* ### are SVN_ERR_APMOD codes within the right numeric space? */
          return dav_new_error(r->pool, HTTP_FORBIDDEN,
                               SVN_ERR_APMOD_MALFORMED_URI,
                               "The URI does not contain the name "
                               "of a repository.");
        }

      magic_end = ap_strchr_c(relative + 1, '/');
      if (!magic_end)
        {
          /* ### Request was for parent directory with no trailing
             slash; we probably ought to just redirect to same with
             trailing slash appended. */
          magic_component = relative + 1;
          relative = "/";
        }
      else
        {
          magic_component = apr_pstrndup(r->pool, relative + 1,
                                         magic_end - relative - 1);
          relative = magic_end;
        }

      /* return answer */
      *repos_name = magic_component;
    }

  /* We can return 'relative' at this point too. */
  *relative_path = apr_pstrdup(r->pool, relative);

  /* Code to remove the !svn junk from the front of the relative path,
     mainly stolen from dav_svn_parse_uri().  This code assumes that
     the 'relative' string being parsed doesn't start with '/'. */
  relative++;

  {
    const char *special_uri = dav_svn_get_special_uri(r);
    apr_size_t len2;
    char ch;

    len1 = strlen(relative);
    len2 = strlen(special_uri);
    if (len1 > len2
        && ((ch = relative[len2]) == '/' || ch == '\0')
        && memcmp(relative, special_uri, len2) == 0)
      {
        if (ch == '\0')
          {
            /* relative is just "!svn", which is malformed. */
            return dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
                                 SVN_ERR_APMOD_MALFORMED_URI,
                                 "Nothing follows the svn special_uri.");
          }
        else
          {
            const struct special_defn *defn;
            
            /* skip past the "!svn/" prefix */
            relative += len2 + 1;
            len1 -= len2 + 1;
            
            for (defn = special_subdirs ; defn->name != NULL; ++defn)
              {
                apr_size_t len3 = strlen(defn->name);
                
                if (len1 >= len3 && memcmp(relative, defn->name, len3) == 0)
                  {
                    /* Found a matching special dir. */

                    if (relative[len3] == '\0')
                      {
                        /* relative is "!svn/xxx"  */
                        if (defn->numcomponents == 0)
                          *repos_path = NULL;
                        else
                          return 
                            dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
                                          SVN_ERR_APMOD_MALFORMED_URI,
                                          "Missing info after special_uri.");
                      }
                    else if (relative[len3] == '/')
                      {                      
                        /* Skip past defn->numcomponents components,
                           return everything beyond that.*/
                        int j;
                        const char *end = NULL, *start = relative + len3 + 1;
                        
                        for (j = 0; j < defn->numcomponents; j++)
                          {
                            end = ap_strchr_c(start, '/');
                            if (! end)
                              break;
                            start = end + 1;
                          }

                        if (! end)
                          {
                            /* Did we break from the loop prematurely? */
                            if (j != (defn->numcomponents - 1))
                              return 
                                dav_new_error(r->pool,
                                              HTTP_INTERNAL_SERVER_ERROR,
                                              SVN_ERR_APMOD_MALFORMED_URI,
                                              "Not enough components"
                                              " after special_uri.");
                            
                            if (! defn->has_repos_path)
                              /* It's okay to not have found a slash. */
                              *repos_path = NULL;
                            else
                              *repos_path = "/";
                          }
                        else
                          {
                            /* Found a slash after the special components. */
                            *repos_path = apr_pstrdup(r->pool, start);
                          }
                      }
                    else
                      {
                        return
                          dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
                                        SVN_ERR_APMOD_MALFORMED_URI,
                                        "Unknown data after special_uri.");
                      }
                    
                  break;
                  }
              }
            
            if (defn->name == NULL)
              dav_new_error(r->pool, HTTP_INTERNAL_SERVER_ERROR,
                            SVN_ERR_APMOD_MALFORMED_URI,
                            "Couldn't match subdir after special_uri.");
          }
      }
    else
      {
        /* There's no "!svn/" at all, so the relative path is already
           a valid path within the repository.  */
        *repos_path = apr_pstrdup(r->pool, relative);
      }    
  }

  return NULL;
}


static dav_error * dav_svn_get_resource(request_rec *r,