mod_autoindex.c

linux网络服务器工具

        else if (!strcasecmp(w, "XHTML")) {
            option = EMIT_XHTML;
        }
        else if (!strcasecmp(w, "ShowForbidden")) {
            option = SHOW_FORBIDDEN;
        }
        else if (!strcasecmp(w, "None")) {
            if (action != '\0') {
                return "Cannot combine '+' or '-' with 'None' keyword";
            }
            opts = NO_OPTIONS;
            opts_add = 0;
            opts_remove = 0;
        }
        else if (!strcasecmp(w, "IconWidth")) {
            if (action != '-') {
                d_cfg->icon_width = DEFAULT_ICON_WIDTH;
            }
            else {
                d_cfg->icon_width = 0;
            }
        }
        else if (!strncasecmp(w, "IconWidth=", 10)) {
            if (action == '-') {
                return "Cannot combine '-' with IconWidth=n";
            }
            d_cfg->icon_width = atoi(&w[10]);
        }
        else if (!strcasecmp(w, "IconHeight")) {
            if (action != '-') {
                d_cfg->icon_height = DEFAULT_ICON_HEIGHT;
            }
            else {
                d_cfg->icon_height = 0;
            }
        }
        else if (!strncasecmp(w, "IconHeight=", 11)) {
            if (action == '-') {
                return "Cannot combine '-' with IconHeight=n";
            }
            d_cfg->icon_height = atoi(&w[11]);
        }
        else if (!strcasecmp(w, "NameWidth")) {
            if (action != '-') {
                return "NameWidth with no value may only appear as "
                       "'-NameWidth'";
            }
            d_cfg->name_width = DEFAULT_NAME_WIDTH;
            d_cfg->name_adjust = K_NOADJUST;
        }
        else if (!strncasecmp(w, "NameWidth=", 10)) {
            if (action == '-') {
                return "Cannot combine '-' with NameWidth=n";
            }
            if (w[10] == '*') {
                d_cfg->name_adjust = K_ADJUST;
            }
            else {
                int width = atoi(&w[10]);

                if (width && (width < 5)) {
                    return "NameWidth value must be greater than 5";
                }
                d_cfg->name_width = width;
                d_cfg->name_adjust = K_NOADJUST;
            }
        }
        else if (!strcasecmp(w, "DescriptionWidth")) {
            if (action != '-') {
                return "DescriptionWidth with no value may only appear as "
                       "'-DescriptionWidth'";
            }
            d_cfg->desc_width = DEFAULT_DESC_WIDTH;
            d_cfg->desc_adjust = K_NOADJUST;
        }
        else if (!strncasecmp(w, "DescriptionWidth=", 17)) {
            if (action == '-') {
                return "Cannot combine '-' with DescriptionWidth=n";
            }
            if (w[17] == '*') {
                d_cfg->desc_adjust = K_ADJUST;
            }
            else {
                int width = atoi(&w[17]);

                if (width && (width < 12)) {
                    return "DescriptionWidth value must be greater than 12";
                }
                d_cfg->desc_width = width;
                d_cfg->desc_adjust = K_NOADJUST;
            }
        }
        else if (!strncasecmp(w, "Type=", 5)) {
            d_cfg->ctype = apr_pstrdup(cmd->pool, &w[5]);
        }
        else if (!strncasecmp(w, "Charset=", 8)) {
            d_cfg->charset = apr_pstrdup(cmd->pool, &w[8]);
        }
        else {
            return "Invalid directory indexing option";
        }
        if (action == '\0') {
            opts |= option;
            opts_add = 0;
            opts_remove = 0;
        }
        else if (action == '+') {
            opts_add |= option;
            opts_remove &= ~option;
        }
        else {
            opts_remove |= option;
            opts_add &= ~option;
        }
    }
    if ((opts & NO_OPTIONS) && (opts & ~NO_OPTIONS)) {
        return "Cannot combine other IndexOptions keywords with 'None'";
    }
    d_cfg->incremented_opts = opts_add;
    d_cfg->decremented_opts = opts_remove;
    d_cfg->opts = opts;
    return NULL;
}

static const char *set_default_order(cmd_parms *cmd, void *m,
                                     const char *direction, const char *key)
{
    autoindex_config_rec *d_cfg = (autoindex_config_rec *) m;

    if (!strcasecmp(direction, "Ascending")) {
        d_cfg->default_direction = D_ASCENDING;
    }
    else if (!strcasecmp(direction, "Descending")) {
        d_cfg->default_direction = D_DESCENDING;
    }
    else {
        return "First keyword must be 'Ascending' or 'Descending'";
    }

    if (!strcasecmp(key, "Name")) {
        d_cfg->default_keyid = K_NAME;
    }
    else if (!strcasecmp(key, "Date")) {
        d_cfg->default_keyid = K_LAST_MOD;
    }
    else if (!strcasecmp(key, "Size")) {
        d_cfg->default_keyid = K_SIZE;
    }
    else if (!strcasecmp(key, "Description")) {
        d_cfg->default_keyid = K_DESC;
    }
    else {
        return "Second keyword must be 'Name', 'Date', 'Size', or "
               "'Description'";
    }

    return NULL;
}

#define DIR_CMD_PERMS OR_INDEXES

static const command_rec autoindex_cmds[] =
{
    AP_INIT_ITERATE2("AddIcon", add_icon, BY_PATH, DIR_CMD_PERMS,
                     "an icon URL followed by one or more filenames"),
    AP_INIT_ITERATE2("AddIconByType", add_icon, BY_TYPE, DIR_CMD_PERMS,
                     "an icon URL followed by one or more MIME types"),
    AP_INIT_ITERATE2("AddIconByEncoding", add_icon, BY_ENCODING, DIR_CMD_PERMS,
                     "an icon URL followed by one or more content encodings"),
    AP_INIT_ITERATE2("AddAlt", add_alt, BY_PATH, DIR_CMD_PERMS,
                     "alternate descriptive text followed by one or more "
                     "filenames"),
    AP_INIT_ITERATE2("AddAltByType", add_alt, BY_TYPE, DIR_CMD_PERMS,
                     "alternate descriptive text followed by one or more MIME "
                     "types"),
    AP_INIT_ITERATE2("AddAltByEncoding", add_alt, BY_ENCODING, DIR_CMD_PERMS,
                     "alternate descriptive text followed by one or more "
                     "content encodings"),
    AP_INIT_TAKE_ARGV("IndexOptions", add_opts, NULL, DIR_CMD_PERMS,
                      "one or more index options [+|-][]"),
    AP_INIT_TAKE2("IndexOrderDefault", set_default_order, NULL, DIR_CMD_PERMS,
                  "{Ascending,Descending} {Name,Size,Description,Date}"),
    AP_INIT_ITERATE("IndexIgnore", add_ignore, NULL, DIR_CMD_PERMS,
                    "one or more file extensions"),
    AP_INIT_ITERATE2("AddDescription", add_desc, BY_PATH, DIR_CMD_PERMS,
                     "Descriptive text followed by one or more filenames"),
    AP_INIT_TAKE1("HeaderName", add_header, NULL, DIR_CMD_PERMS,
                  "a filename"),
    AP_INIT_TAKE1("ReadmeName", add_readme, NULL, DIR_CMD_PERMS,
                  "a filename"),
    AP_INIT_RAW_ARGS("FancyIndexing", ap_set_deprecated, NULL, OR_ALL,
                     "The FancyIndexing directive is no longer supported. "
                     "Use IndexOptions FancyIndexing."),
    AP_INIT_TAKE1("DefaultIcon", ap_set_string_slot,
                  (void *)APR_OFFSETOF(autoindex_config_rec, default_icon),
                  DIR_CMD_PERMS, "an icon URL"),
    AP_INIT_TAKE1("IndexStyleSheet", ap_set_string_slot,
                  (void *)APR_OFFSETOF(autoindex_config_rec, style_sheet),
                  DIR_CMD_PERMS, "URL to style sheet"),
    {NULL}
};

static void *create_autoindex_config(apr_pool_t *p, char *dummy)
{
    autoindex_config_rec *new =
    (autoindex_config_rec *) apr_pcalloc(p, sizeof(autoindex_config_rec));

    new->icon_width = 0;
    new->icon_height = 0;
    new->name_width = DEFAULT_NAME_WIDTH;
    new->name_adjust = K_UNSET;
    new->desc_width = DEFAULT_DESC_WIDTH;
    new->desc_adjust = K_UNSET;
    new->icon_list = apr_array_make(p, 4, sizeof(struct item));
    new->alt_list = apr_array_make(p, 4, sizeof(struct item));
    new->desc_list = apr_array_make(p, 4, sizeof(ai_desc_t));
    new->ign_list = apr_array_make(p, 4, sizeof(struct item));
    new->hdr_list = apr_array_make(p, 4, sizeof(struct item));
    new->rdme_list = apr_array_make(p, 4, sizeof(struct item));
    new->opts = 0;
    new->incremented_opts = 0;
    new->decremented_opts = 0;
    new->default_keyid = '\0';
    new->default_direction = '\0';

    return (void *) new;
}

static void *merge_autoindex_configs(apr_pool_t *p, void *basev, void *addv)
{
    autoindex_config_rec *new;
    autoindex_config_rec *base = (autoindex_config_rec *) basev;
    autoindex_config_rec *add = (autoindex_config_rec *) addv;

    new = (autoindex_config_rec *) apr_pcalloc(p, sizeof(autoindex_config_rec));
    new->default_icon = add->default_icon ? add->default_icon
                                          : base->default_icon;
    new->style_sheet = add->style_sheet ? add->style_sheet
                                          : base->style_sheet;
    new->icon_height = add->icon_height ? add->icon_height : base->icon_height;
    new->icon_width = add->icon_width ? add->icon_width : base->icon_width;

    new->ctype = add->ctype ? add->ctype : base->ctype;
    new->charset = add->charset ? add->charset : base->charset;

    new->alt_list = apr_array_append(p, add->alt_list, base->alt_list);
    new->ign_list = apr_array_append(p, add->ign_list, base->ign_list);
    new->hdr_list = apr_array_append(p, add->hdr_list, base->hdr_list);
    new->desc_list = apr_array_append(p, add->desc_list, base->desc_list);
    new->icon_list = apr_array_append(p, add->icon_list, base->icon_list);
    new->rdme_list = apr_array_append(p, add->rdme_list, base->rdme_list);
    if (add->opts & NO_OPTIONS) {
        /*
         * If the current directory says 'no options' then we also
         * clear any incremental mods from being inheritable further down.
         */
        new->opts = NO_OPTIONS;
        new->incremented_opts = 0;
        new->decremented_opts = 0;
    }
    else {
        /*
         * If there were any nonincremental options selected for
         * this directory, they dominate and we don't inherit *anything.*
         * Contrariwise, we *do* inherit if the only settings here are
         * incremental ones.
         */
        if (add->opts == 0) {
            new->incremented_opts = (base->incremented_opts
                                     | add->incremented_opts)
                                    & ~add->decremented_opts;
            new->decremented_opts = (base->decremented_opts
                                     | add->decremented_opts);
            /*
             * We may have incremental settings, so make sure we don't
             * inadvertently inherit an IndexOptions None from above.
             */
            new->opts = (base->opts & ~NO_OPTIONS);
        }
        else {
            /*
             * There are local nonincremental settings, which clear
             * all inheritance from above.  They *are* the new base settings.
             */
            new->opts = add->opts;;
        }
        /*
         * We're guaranteed that there'll be no overlap between
         * the add-options and the remove-options.
         */
        new->opts |= new->incremented_opts;
        new->opts &= ~new->decremented_opts;
    }
    /*
     * Inherit the NameWidth settings if there aren't any specific to
     * the new location; otherwise we'll end up using the defaults set in the
     * config-rec creation routine.
     */
    if (add->name_adjust == K_UNSET) {
        new->name_width = base->name_width;
        new->name_adjust = base->name_adjust;
    }
    else {
        new->name_width = add->name_width;
        new->name_adjust = add->name_adjust;
    }

    /*
     * Likewise for DescriptionWidth.
     */
    if (add->desc_adjust == K_UNSET) {
        new->desc_width = base->desc_width;
        new->desc_adjust = base->desc_adjust;
    }
    else {
        new->desc_width = add->desc_width;
        new->desc_adjust = add->desc_adjust;
    }

    new->default_keyid = add->default_keyid ? add->default_keyid
                                            : base->default_keyid;
    new->default_direction = add->default_direction ? add->default_direction
                                                    : base->default_direction;
    return new;
}

/****************************************************************
 *
 * Looking things up in config entries...
 */

/* Structure used to hold entries when we're actually building an index */

struct ent {
    char *name;
    char *icon;
    char *alt;
    char *desc;
    apr_off_t size;
    apr_time_t lm;
    struct ent *next;
    int ascending, ignore_case, version_sort;
    char key;
    int isdir;
};

static char *find_item(request_rec *r, apr_array_header_t *list, int path_only)
{
    const char *content_type = ap_field_noparam(r->pool, r->content_type);
    const char *content_encoding = r->content_encoding;
    char *path = r->filename;

    struct item *items = (struct item *) list->elts;
    int i;

    for (i = 0; i < list->nelts; ++i) {
        struct item *p = &items[i];

        /* Special cased for ^^DIRECTORY^^ and ^^BLANKICON^^ */
        if ((path[0] == '^') || (!ap_strcmp_match(path, p->apply_path))) {
            if (!*(p->apply_to)) {
                return p->data;
            }
            else if (p->type == BY_PATH || path[0] == '^') {
                if (!ap_strcmp_match(path, p->apply_to)) {
                    return p->data;
                }
            }
            else if (!path_only) {
                if (!content_encoding) {
                    if (p->type == BY_TYPE) {
                        if (content_type
                            && !ap_strcasecmp_match(content_type,
                                                    p->apply_to)) {
                            return p->data;
                        }
                    }
                }
                else {
                    if (p->type == BY_ENCODING) {
                        if (!ap_strcasecmp_match(content_encoding,
                                                 p->apply_to)) {
                            return p->data;
                        }
                    }
                }
            }
        }
    }
    return NULL;
}

#define find_icon(d,p,t) find_item(p,d->icon_list,t)
#define find_alt(d,p,t) find_item(p,d->alt_list,t)
#define find_header(d,p) find_item(p,d->hdr_list,0)
#define find_readme(d,p) find_item(p,d->rdme_list,0)