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authorLoïc Collignon <loic.collignon@iot.bzh>2018-02-08 11:06:33 +0100
committerLoïc Collignon <loic.collignon@iot.bzh>2018-02-08 11:17:04 +0100
commit91e32ea5d46e6f7f50a0f0bdbd1d7e8f513fc3bf (patch)
treec7b25fe982a6bbe51937f54ac15235152e247c9f /ll-database-binding/src/persistence-binding.c
parentf0c76b5866a264020d132bebde248613daabbbc6 (diff)
Change-Id: I7103241843736e1a5747253781485afa457a64d0 Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>
Diffstat (limited to 'll-database-binding/src/persistence-binding.c')
-rw-r--r--ll-database-binding/src/persistence-binding.c469
1 files changed, 0 insertions, 469 deletions
diff --git a/ll-database-binding/src/persistence-binding.c b/ll-database-binding/src/persistence-binding.c
deleted file mode 100644
index b6ec8d1..0000000
--- a/ll-database-binding/src/persistence-binding.c
+++ /dev/null
@@ -1,469 +0,0 @@
-/*
- * Copyright 2017 IoT.bzh
- *
- * author: Loïc Collignon <loic.collignon@iot.bzh>
- * author: Jose Bollo <jose.bollo@iot.bzh>
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define _GNU_SOURCE
-#include <unistd.h>
-#include <sys/types.h>
-#include <pwd.h>
-#include <stdio.h>
-#include <string.h>
-#include <limits.h>
-
-#include <json-c/json.h>
-
-#define AFB_BINDING_VERSION 2
-#include <afb/afb-binding.h>
-
-#if !defined(TO_STRING_FLAGS)
-# if !defined(JSON_C_TO_STRING_NOSLASHESCAPE)
-# define JSON_C_TO_STRING_NOSLASHESCAPE (1<<4)
-# endif
-# define TO_STRING_FLAGS (JSON_C_TO_STRING_PLAIN | JSON_C_TO_STRING_NOSLASHESCAPE)
-#endif
-
-#if defined(USE_BERKELEY_DB)
-# undef USE_BERKELEY_DB
-#endif
-
-#if defined(USE_GDBM)
-# undef USE_GDBM
-# define USE_GDBM 1
-# define USE_BERKELEY_DB 0
-#else
-# define USE_GDBM 0
-# define USE_BERKELEY_DB 1
-#endif
-
-// ----- Berkeley database -----
-#if USE_BERKELEY_DB
-
-#include <db.h>
-
-#define DBFILE "ll-database-binding.db"
-#define DATA DBT
-#define DATA_SET(k,d,s) do{memset((k),0,sizeof*(k));(k)->data=(void*)d;(k)->size=(uint32_t)s;}while(0)
-#define DATA_PTR(k) ((void*)((k).data))
-#define DATA_STR(k) ((char*)((k).data))
-#define DATA_SZ(k) ((size_t)((k).size))
-
-static DB *database;
-
-static int xdb_open(const char *path)
-{
- int ret;
-
- ret = db_create(&database, NULL, 0);
- if (ret != 0)
- {
- AFB_ERROR("Failed to create database: %s.", db_strerror(ret));
- return -1;
- }
-
- ret = database->open(database, NULL, path, NULL, DB_BTREE, DB_CREATE, 0600);
- if (ret != 0)
- {
- AFB_ERROR("Failed to open the '%s' database: %s.", path, db_strerror(ret));
- database->close(database, 0);
- return -1;
- }
- return 0;
-}
-
-static void xdb_put(struct afb_req req, DBT *key, DBT *data, int replace)
-{
- int ret;
-
- ret = database->put(database, NULL, key, data, replace ? 0 : DB_NOOVERWRITE);
- if (ret == 0)
- afb_req_success(req, NULL, NULL);
- else
- {
- AFB_ERROR("can't %s key %s with %s", replace ? "replace" : "insert", DATA_STR(*key), DATA_STR(*data));
- afb_req_fail_f(req, "failed", "%s", db_strerror(ret));
- }
-}
-
-static void xdb_delete(struct afb_req req, DBT *key)
-{
- int ret;
-
- ret = database->del(database, NULL, key, 0);
- if (ret == 0)
- afb_req_success_f(req, NULL, NULL);
- else
- {
- AFB_ERROR("can't delete key %s", DATA_STR(*key));
- afb_req_fail_f(req, "failed", "%s", db_strerror(ret));
- }
-
- free(DATA_PTR(key));
-}
-
-static void verb_read(struct afb_req req)
-{
- DATA key;
- DATA data;
- int ret;
-
- char value[4096];
-
- struct json_object* result;
- struct json_object* val;
-
-
- if (get_key(req, &key))
- return;
-
- AFB_INFO("read: key=%s", DATA_STR(key));
-
- memset(&data, 0, sizeof data);
- data.data = value;
- data.ulen = 4096;
- data.flags = DB_DBT_USERMEM;
-
- ret = database->get(database, NULL, &key, &data, 0);
- if (ret == 0)
- {
- result = json_object_new_object();
- val = json_tokener_parse(DATA_STR(data));
- json_object_object_add(result, "value", val ? val : json_object_new_string(DATA_STR(data)));
-
- afb_req_success_f(req, result, "db success: read %s=%s.", DATA_STR(key), DATA_STR(data));
- }
- else
- afb_req_fail_f(req, "Failed to read datas.", "db fail: read %s - %s", DATA_STR(key), db_strerror(ret));
-
- free(DATA_PTR(key));
-}
-
-#endif
-
-// ----- gdbm database -----
-#if USE_GDBM
-
-#include <errno.h>
-#include <gdbm.h>
-
-#define DBFILE "ll-database-binding.dbm"
-#define DATA datum
-#define DATA_SET(k,d,s) do{(k)->dptr=(char*)d;(k)->dsize=(int)s;}while(0)
-#define DATA_PTR(k) ((void*)((k).dptr))
-#define DATA_STR(k) ((char*)((k).dptr))
-#define DATA_SZ(k) ((size_t)((k).dsize))
-
-#if GDBM_VERSION_MAJOR > 1 || (GDBM_VERSION_MAJOR == 1 && GDBM_VERSION_MINOR >= 13)
-# define IFSYS(yes,no) (gdbm_syserr[gdbm_errno] ? (yes) : (no))
-#else
-# define IFSYS(yes,no) (no)
-#endif
-
-static GDBM_FILE database;
-
-static void onfatal(const char *text)
-{
- AFB_ERROR("fatal gdbm message: %s", text);
-}
-
-static int xdb_open(const char *path)
-{
- database = gdbm_open(path, 512, GDBM_WRCREAT|GDBM_SYNC, 0600, onfatal);
- if (!database)
- {
- AFB_ERROR("Fail to open/create database: %s%s%s",
- gdbm_strerror(gdbm_errno),
- IFSYS(", ", ""),
- IFSYS(strerror(errno), ""));
- return -1;
-
- }
- return 0;
-}
-
-static void xdb_put(struct afb_req req, datum *key, datum *data, int replace)
-{
- int ret;
-
- ret = gdbm_store(database, *key, *data, replace ? GDBM_REPLACE : GDBM_INSERT);
- if (ret == 0)
- afb_req_success(req, NULL, NULL);
- else
- {
- AFB_ERROR("can't %s key %s with %s: %s%s%s",
- replace ? "replace" : "insert",
- DATA_STR(*key),
- DATA_STR(*data),
- gdbm_strerror(gdbm_errno),
- IFSYS(", ", ""),
- IFSYS(strerror(errno), ""));
- afb_req_fail_f(req, "failed", "%s", ret > 0 ? "key already exists" : gdbm_strerror(gdbm_errno));
- }
-}
-
-static void xdb_delete(struct afb_req req, datum *key)
-{
- int ret;
-
- ret = gdbm_delete(database, *key);
- if (ret == 0)
- afb_req_success_f(req, NULL, NULL);
- else
- {
- AFB_ERROR("can't delete key %s: %s%s%s",
- DATA_STR(*key),
- gdbm_strerror(gdbm_errno),
- IFSYS(", ", ""),
- IFSYS(strerror(errno), ""));
- afb_req_fail_f(req, "failed", "%s", gdbm_strerror(gdbm_errno));
- }
-}
-
-static void xdb_get(struct afb_req req, datum *key)
-{
- struct json_object* obj;
- datum result;
-
- result = gdbm_fetch(database, *key);
- if (result.dptr)
- {
- obj = json_object_new_object();
- json_object_object_add(obj, "value", json_tokener_parse(result.dptr));
- afb_req_success(req, obj, NULL);
- free(result.dptr);
- }
- else
- {
- AFB_ERROR("can't get key %s: %s%s%s",
- DATA_STR(*key),
- gdbm_strerror(gdbm_errno),
- IFSYS(", ", ""),
- IFSYS(strerror(errno), ""));
- afb_req_fail_f(req, "failed", "%s", gdbm_strerror(gdbm_errno));
- }
-}
-#endif
-
-// ----- Binding's implementations -----
-
-/**
- * @brief Get the path to the database
- */
-static int get_database_path(char *buffer, size_t size)
-{
- static const char dbfile[] = DBFILE;
-
- char *home, *config;
- int rc;
-
- config = secure_getenv("XDG_CONFIG_HOME");
- if (config)
- rc = snprintf(buffer, size, "%s/%s", config, dbfile);
- else
- {
- home = secure_getenv("HOME");
- if (home)
- rc = snprintf(buffer, size, "%s/.config/%s", home, dbfile);
- else
- {
- uid_t uid = getuid();
- struct passwd *pwd = getpwuid(uid);
- if (pwd)
- rc = snprintf(buffer, size, "%s/.config/%s", pwd->pw_dir, dbfile);
- else
- rc = snprintf(buffer, size, "/home/%d/.config/%s", (int)uid, dbfile);
- }
- }
- return rc;
-}
-
-/**
- * @brief Initialize the binding.
- * @return Exit code, zero if success.
- */
-static int ll_database_binding_init()
-{
- char path[PATH_MAX];
- int ret;
-
- ret = get_database_path(path, sizeof path);
- if (ret < 0 || (int)ret >= (int)(sizeof path))
- {
- AFB_ERROR("Can't compute the database filename");
- return -1;
- }
-
- AFB_INFO("opening database %s", path);
- return xdb_open(path);
-}
-
-/**
- * Returns the database key for the 'req'
- */
-static int get_key(struct afb_req req, DATA *key)
-{
- char *appid, *data;
- const char *jkey;
-
- size_t ljkey, lappid, size;
-
- struct json_object* args;
- struct json_object* item;
-
- /* get the key */
- args = afb_req_json(req);
- if (!json_object_object_get_ex(args, "key", &item))
- {
- afb_req_fail(req, "no-key", NULL);
- return -1;
- }
- if (!item
- || !(jkey = json_object_to_json_string_ext(item, JSON_C_TO_STRING_PLAIN))
- || !(ljkey = strlen(jkey)))
- {
- afb_req_fail(req, "bad-key", NULL);
- return -1;
- }
-
- /* get the appid */
- appid = afb_req_get_application_id(req);
-#if 1
- if (!appid)
- appid = strdup("#UNKNOWN-APP#");
-#endif
- if (!appid)
- {
- afb_req_fail(req, "bad-context", NULL);
- return -1;
- }
-
- /* make the db-key */
- lappid = strlen(appid);
- size = lappid + ljkey + 2;
- data = realloc(appid, size);
- if (!data)
- {
- free(appid);
- afb_req_fail(req, "out-of-memory", NULL);
- return -1;
- }
- data[lappid] = ':';
- memcpy(&data[lappid + 1], jkey, ljkey + 1);
-
- /* return the key */
- DATA_SET(key, data, size);
- return 0;
-}
-
-static void put(struct afb_req req, int replace)
-{
- DATA key;
- DATA data;
-
- const char* value;
-
- struct json_object* args;
- struct json_object* item;
-
- /* get the value */
- args = afb_req_json(req);
- if (!json_object_object_get_ex(args, "value", &item))
- {
- afb_req_fail(req, "no-value", NULL);
- return;
- }
- value = json_object_to_json_string_ext(item, TO_STRING_FLAGS);
- if (!value)
- {
- afb_req_fail(req, "out-of-memory", NULL);
- return;
- }
- DATA_SET(&data, value, strlen(value) + 1); /* includes the tailing null */
-
- /* get the key */
- if (get_key(req, &key))
- return;
-
- AFB_INFO("put: key=%s, value=%s", DATA_STR(key), DATA_STR(data));
- xdb_put(req, &key, &data, replace);
- free(DATA_PTR(key));
-}
-
-static void verb_insert(struct afb_req req)
-{
- put(req, 0);
-}
-
-static void verb_update(struct afb_req req)
-{
- put(req, 1);
-}
-
-static void verb_delete(struct afb_req req)
-{
- DATA key;
-
- if (get_key(req, &key))
- return;
-
- AFB_INFO("delete: key=%s", DATA_STR(key));
- xdb_delete(req, &key);
- free(DATA_PTR(key));
-}
-
-static void verb_read(struct afb_req req)
-{
- DATA key;
-
- if (get_key(req, &key))
- return;
-
- AFB_INFO("read: key=%s", DATA_STR(key));
- xdb_get(req, &key);
- free(DATA_PTR(key));
-}
-
-// ----- Binding's configuration -----
-/*
-static const struct afb_auth ll_database_binding_auths[] = {
-};
-*/
-
-#define VERB(name_,auth_,info_,sess_) {\
- .verb = #name_, \
- .callback = verb_##name_, \
- .auth = auth_, \
- .info = info_, \
- .session = sess_ }
-
-static const afb_verb_v2 ll_database_binding_verbs[]= {
- VERB(insert, NULL, NULL, AFB_SESSION_NONE_V2),
- VERB(update, NULL, NULL, AFB_SESSION_NONE_V2),
- VERB(delete, NULL, NULL, AFB_SESSION_NONE_V2),
- VERB(read, NULL, NULL, AFB_SESSION_NONE_V2),
- { .verb = NULL}
-};
-
-const struct afb_binding_v2 afbBindingV2 = {
- .api = "persistence",
- .specification = NULL,
- .verbs = ll_database_binding_verbs,
- .preinit = NULL,
- .init = ll_database_binding_init,
- .onevent = NULL,
- .noconcurrency = 0
-};