mod_mime.c

Apache官方在今天放出产品系列2.2的最新版本2.2.11的源码包 最流行的HTTP服务器软件之一

                                             | MULTIMATCH_ANY))) {
            return "Filters is incompatible with Any and NegotiatedOnly";
        }
        m->multimatch |= MULTIMATCH_FILTERS;
    }
    else if (strcasecmp(include, "Handlers") == 0) {
        if (m->multimatch && (m->multimatch & (MULTIMATCH_NEGOTIATED
                                             | MULTIMATCH_ANY))) {
            return "Handlers is incompatible with Any and NegotiatedOnly";
        }
        m->multimatch |= MULTIMATCH_HANDLERS;
    }
    else {
        return apr_psprintf(cmd->pool, "Unrecognized option '%s'", include);
    }

    return NULL;
}

static const command_rec mime_cmds[] =
{
    AP_INIT_ITERATE2("AddCharset", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, charset_type), OR_FILEINFO,
        "a charset (e.g., iso-2022-jp), followed by one or more "
        "file extensions"),
    AP_INIT_ITERATE2("AddEncoding", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, encoding_type), OR_FILEINFO,
        "an encoding (e.g., gzip), followed by one or more file extensions"),
    AP_INIT_ITERATE2("AddHandler", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, handler), OR_FILEINFO,
        "a handler name followed by one or more file extensions"),
    AP_INIT_ITERATE2("AddInputFilter", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, input_filters), OR_FILEINFO,
        "input filter name (or ; delimited names) followed by one or "
        "more file extensions"),
    AP_INIT_ITERATE2("AddLanguage", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, language_type), OR_FILEINFO,
        "a language (e.g., fr), followed by one or more file extensions"),
    AP_INIT_ITERATE2("AddOutputFilter", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, output_filters), OR_FILEINFO,
        "output filter name (or ; delimited names) followed by one or "
        "more file extensions"),
    AP_INIT_ITERATE2("AddType", add_extension_info,
        (void *)APR_OFFSETOF(extension_info, forced_type), OR_FILEINFO,
        "a mime type followed by one or more file extensions"),
    AP_INIT_TAKE1("DefaultLanguage", ap_set_string_slot,
        (void*)APR_OFFSETOF(mime_dir_config, default_language), OR_FILEINFO,
        "language to use for documents with no other language file extension"),
    AP_INIT_ITERATE("MultiviewsMatch", multiviews_match, NULL, OR_FILEINFO,
        "NegotiatedOnly (default), Handlers and/or Filters, or Any"),
    AP_INIT_ITERATE("RemoveCharset", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, charset_type), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveEncoding", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, encoding_type), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveHandler", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, handler), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveInputFilter", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, input_filters), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveLanguage", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, language_type), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveOutputFilter", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, output_filters), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_ITERATE("RemoveType", remove_extension_info,
        (void *)APR_OFFSETOF(extension_info, forced_type), OR_FILEINFO,
        "one or more file extensions"),
    AP_INIT_TAKE1("TypesConfig", set_types_config, NULL, RSRC_CONF,
        "the MIME types config file"),
    AP_INIT_FLAG("ModMimeUsePathInfo", ap_set_flag_slot,
        (void *)APR_OFFSETOF(mime_dir_config, use_path_info), ACCESS_CONF,
        "Set to 'yes' to allow mod_mime to use path info for type checking"),
    {NULL}
};

static apr_hash_t *mime_type_extensions;

static int mime_post_config(apr_pool_t *p, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
{
    ap_configfile_t *f;
    char l[MAX_STRING_LEN];
    const char *types_confname = ap_get_module_config(s->module_config,
                                                      &mime_module);
    apr_status_t status;

    if (!types_confname) {
        types_confname = AP_TYPES_CONFIG_FILE;
    }

    types_confname = ap_server_root_relative(p, types_confname);
    if (!types_confname) {
        ap_log_error(APLOG_MARK, APLOG_ERR, APR_EBADPATH, s,
                     "Invalid mime types config path %s",
                     (const char *)ap_get_module_config(s->module_config,
                                                        &mime_module));
        return HTTP_INTERNAL_SERVER_ERROR;
    }
    if ((status = ap_pcfg_openfile(&f, ptemp, types_confname))
                != APR_SUCCESS) {
        ap_log_error(APLOG_MARK, APLOG_ERR, status, s,
                     "could not open mime types config file %s.",
                     types_confname);
        return HTTP_INTERNAL_SERVER_ERROR;
    }

    mime_type_extensions = apr_hash_make(p);

    while (!(ap_cfg_getline(l, MAX_STRING_LEN, f))) {
        const char *ll = l, *ct;

        if (l[0] == '#') {
            continue;
        }
        ct = ap_getword_conf(p, &ll);

        while (ll[0]) {
            char *ext = ap_getword_conf(p, &ll);
            ap_str_tolower(ext);
            apr_hash_set(mime_type_extensions, ext, APR_HASH_KEY_STRING, ct);
        }
    }
    ap_cfg_closefile(f);
    return OK;
}

static const char *zap_sp(const char *s)
{
    if (s == NULL) {
        return (NULL);
    }
    if (*s == '\0') {
        return (s);
    }

    /* skip prefixed white space */
    for (; *s == ' ' || *s == '\t' || *s == '\n'; s++)
        ;

    return (s);
}

static char *zap_sp_and_dup(apr_pool_t *p, const char *start,
                            const char *end, apr_size_t *len)
{
    while ((start < end) && apr_isspace(*start)) {
        start++;
    }
    while ((end > start) && apr_isspace(*(end - 1))) {
        end--;
    }
    if (len) {
        *len = end - start;
    }
    return apr_pstrmemdup(p, start, end - start);
}

static int is_token(char c)
{
    int res;

    res = (apr_isascii(c) && apr_isgraph(c)
           && (strchr(tspecial, c) == NULL)) ? 1 : -1;
    return res;
}

static int is_qtext(char c)
{
    int res;

    res = (apr_isascii(c) && (c != '"') && (c != '\\') && (c != '\n'))
        ? 1 : -1;
    return res;
}

static int is_quoted_pair(const char *s)
{
    int res = -1;
    int c;

    if (((s + 1) != NULL) && (*s == '\\')) {
        c = (int) *(s + 1);
        if (apr_isascii(c)) {
            res = 1;
        }
    }
    return (res);
}

static content_type *analyze_ct(request_rec *r, const char *s)
{
    const char *cp, *mp;
    char *attribute, *value;
    int quoted = 0;
    server_rec * ss = r->server;
    apr_pool_t * p = r->pool;

    content_type *ctp;
    param *pp, *npp;

    /* initialize ctp */
    ctp = (content_type *)apr_palloc(p, sizeof(content_type));
    ctp->type = NULL;
    ctp->subtype = NULL;
    ctp->param = NULL;

    mp = s;

    /* getting a type */
    cp = mp;
    while (apr_isspace(*cp)) {
        cp++;
    }
    if (!*cp) {
        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                     "mod_mime: analyze_ct: cannot get media type from '%s'",
                     (const char *) mp);
        return (NULL);
    }
    ctp->type = cp;
    do {
        cp++;
    } while (*cp && (*cp != '/') && !apr_isspace(*cp) && (*cp != ';'));
    if (!*cp || (*cp == ';')) {
        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                     "Cannot get media type from '%s'",
                     (const char *) mp);
        return (NULL);
    }
    while (apr_isspace(*cp)) {
        cp++;
    }
    if (*cp != '/') {
        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                     "mod_mime: analyze_ct: cannot get media type from '%s'",
                     (const char *) mp);
        return (NULL);
    }
    ctp->type_len = cp - ctp->type;

    cp++; /* skip the '/' */

    /* getting a subtype */
    while (apr_isspace(*cp)) {
        cp++;
    }
    if (!*cp) {
        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                     "Cannot get media subtype.");
        return (NULL);
    }
    ctp->subtype = cp;
    do {
        cp++;
    } while (*cp && !apr_isspace(*cp) && (*cp != ';'));
    ctp->subtype_len = cp - ctp->subtype;
    while (apr_isspace(*cp)) {
        cp++;
    }

    if (*cp == '\0') {
        return (ctp);
    }

    /* getting parameters */
    cp++; /* skip the ';' */
    cp = zap_sp(cp);
    if (cp == NULL || *cp == '\0') {
        ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                     "Cannot get media parameter.");
        return (NULL);
    }
    mp = cp;
    attribute = NULL;
    value = NULL;

    while (cp != NULL && *cp != '\0') {
        if (attribute == NULL) {
            if (is_token(*cp) > 0) {
                cp++;
                continue;
            }
            else if (*cp == ' ' || *cp == '\t' || *cp == '\n') {
                cp++;
                continue;
            }
            else if (*cp == '=') {
                attribute = zap_sp_and_dup(p, mp, cp, NULL);
                if (attribute == NULL || *attribute == '\0') {
                    ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                                 "Cannot get media parameter.");
                    return (NULL);
                }
                cp++;
                cp = zap_sp(cp);
                if (cp == NULL || *cp == '\0') {
                    ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                                 "Cannot get media parameter.");
                    return (NULL);
                }
                mp = cp;
                continue;
            }
            else {
                ap_log_error(APLOG_MARK, APLOG_WARNING, 0, ss,
                             "Cannot get media parameter.");
                return (NULL);
            }
        }
        else {
            if (mp == cp) {
                if (*cp == '"') {
                    quoted = 1;
                    cp++;
                }
                else {
                    quoted = 0;
                }
            }
            if (quoted > 0) {
                while (quoted && *cp != '\0') {
                    if (is_qtext(*cp) > 0) {
                        cp++;
                    }
                    else if (is_quoted_pair(cp) > 0) {
                        cp += 2;
                    }
                    else if (*cp == '"') {