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Diffstat (limited to 'res/res_ari_model.c')
| -rw-r--r-- | res/res_ari_model.c | 207 |
1 files changed, 207 insertions, 0 deletions
diff --git a/res/res_ari_model.c b/res/res_ari_model.c new file mode 100644 index 000000000..fd2ec6493 --- /dev/null +++ b/res/res_ari_model.c @@ -0,0 +1,207 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2013, Digium, Inc. + * + * David M. Lee, II <dlee@digium.com> + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief Implementation Swagger validators. + * + * \author David M. Lee, II <dlee@digium.com> + */ + +/*** MODULEINFO + <support_level>core</support_level> + ***/ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include "stasis_http/ari_model_validators.h" +#include "asterisk/logger.h" +#include "asterisk/module.h" +#include "asterisk/utils.h" + +#include <regex.h> + +/* Regex to match date strings */ +static regex_t date_regex; + +/* Regex for YYYY-MM-DD */ +#define REGEX_YMD "[0-9]{4}-[01][0-9]-[0-3][0-9]" + +/* Regex for hh:mm(:ss(.s)); seconds and subseconds optional + * Handles the probably impossible case of a leap second, too */ +#define REGEX_HMS "[0-2][0-9]:[0-5][0-9](:[0-6][0-9](.[0-9]+)?)?" + +/* Regex for timezone: (+|-)hh(:mm), with optional colon. */ +#define REGEX_TZ "(Z|[-+][0-2][0-9](:?[0-5][0-9])?)" + +/* REGEX for ISO 8601, the time specifier optional */ +#define ISO8601_PATTERN "^" REGEX_YMD "(T" REGEX_HMS REGEX_TZ ")?$" + +static int check_type(struct ast_json *json, enum ast_json_type expected) +{ + enum ast_json_type actual; + + if (!json) { + ast_log(LOG_ERROR, "Expected type %s, was NULL\n", + ast_json_typename(expected)); + return 0; + } + + actual = ast_json_typeof(json); + if (expected != actual) { + ast_log(LOG_ERROR, "Expected type %s, was %s\n", + ast_json_typename(expected), ast_json_typename(actual)); + return 0; + } + return 1; +} + +static int check_range(intmax_t minval, intmax_t maxval, struct ast_json *json) +{ + intmax_t v; + + if (!check_type(json, AST_JSON_INTEGER)) { + return 0; + } + + v = ast_json_integer_get(json); + + if (v < minval || maxval < v) { + ast_log(LOG_ERROR, "Value out of range. Expected %jd <= %jd <= %jd\n", minval, v, maxval); + return 0; + } + return 1; +} + +int ari_validate_void(struct ast_json *json) +{ + return check_type(json, AST_JSON_NULL); +} + +int ari_validate_byte(struct ast_json *json) +{ + /* Java bytes are signed, which accounts for great fun for all */ + return check_range(-128, 255, json); +} + +int ari_validate_boolean(struct ast_json *json) +{ + enum ast_json_type actual = ast_json_typeof(json); + switch (actual) { + case AST_JSON_TRUE: + case AST_JSON_FALSE: + return 1; + default: + ast_log(LOG_ERROR, "Expected type boolean, was %s\n", + ast_json_typename(actual)); + return 0; + } +} + +int ari_validate_int(struct ast_json *json) +{ + /* Swagger int's are 32-bit */ + return check_range(-2147483648, 2147483647, json); +} + +int ari_validate_long(struct ast_json *json) +{ + /* All integral values are valid longs. No need for range check. */ + return check_type(json, AST_JSON_INTEGER); +} + +int ari_validate_float(struct ast_json *json) +{ + return check_type(json, AST_JSON_REAL); +} + +int ari_validate_double(struct ast_json *json) +{ + return check_type(json, AST_JSON_REAL); +} + +int ari_validate_string(struct ast_json *json) +{ + return check_type(json, AST_JSON_STRING); +} + +int ari_validate_date(struct ast_json *json) +{ + /* Dates are ISO-8601 strings */ + const char *str; + if (!check_type(json, AST_JSON_STRING)) { + return 0; + } + str = ast_json_string_get(json); + ast_assert(str != NULL); + if (regexec(&date_regex, str, 0, NULL, 0) != 0) { + ast_log(LOG_ERROR, "Date field is malformed: '%s'\n", str); + return 0; + } + return 1; +} + +int ari_validate_list(struct ast_json *json, int (*fn)(struct ast_json *)) +{ + int res = 1; + size_t i; + + if (!check_type(json, AST_JSON_ARRAY)) { + return 0; + } + + for (i = 0; i < ast_json_array_size(json); ++i) { + int member_res; + member_res = fn(ast_json_array_get(json, i)); + if (!member_res) { + ast_log(LOG_ERROR, + "Array member %zd failed validation\n", i); + res = 0; + } + } + + return res; +} + +static int load_module(void) +{ + int res; + res = regcomp(&date_regex, ISO8601_PATTERN, + REG_EXTENDED | REG_ICASE | REG_NOSUB); + + if (res != 0) { + return AST_MODULE_LOAD_FAILURE; + } + return AST_MODULE_LOAD_SUCCESS; +} + +static int unload_module(void) +{ + regfree(&date_regex); + return 0; +} + +AST_MODULE_INFO(ASTERISK_GPL_KEY, + AST_MODFLAG_LOAD_ORDER | AST_MODFLAG_GLOBAL_SYMBOLS, + "ARI Model validators", + .load = load_module, + .unload = unload_module, + .load_pri = AST_MODPRI_APP_DEPEND, + ); |