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authorLoïc Collignon <loic.collignon@iot.bzh>2017-07-11 06:36:33 +0200
committerLoïc Collignon <loic.collignon@iot.bzh>2017-07-11 06:36:33 +0200
commit0455a7401f9f0f9bfad82c5ddf04f7dd70b0b852 (patch)
tree819bc150cb62c8eb344656086bbb52892f5288b8 /ll-store-binding/src/ll-store-binding.c
parent66b90d26cfd555b2aa5fef67d31e539a70256719 (diff)
first somewhat working version.
Change-Id: I3101dc6b8add87eccac3bbf177b1320137f72463 Signed-off-by: Loïc Collignon <loic.collignon@iot.bzh>
Diffstat (limited to 'll-store-binding/src/ll-store-binding.c')
-rw-r--r--ll-store-binding/src/ll-store-binding.c269
1 files changed, 269 insertions, 0 deletions
diff --git a/ll-store-binding/src/ll-store-binding.c b/ll-store-binding/src/ll-store-binding.c
new file mode 100644
index 0000000..fd65552
--- /dev/null
+++ b/ll-store-binding/src/ll-store-binding.c
@@ -0,0 +1,269 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <string.h>
+#include <json-c/json.h>
+#include <lmdb.h>
+
+#define AFB_BINDING_VERSION 2
+#include <afb/afb-binding.h>
+
+#define DB_FILE "/home/agl/projects/ll-store-binding/build/src/ll-store-binding.lmdb"
+
+MDB_env* dbenv;
+
+/// @brief Get a string from a json object.
+/// @param[in] obj Json object from wich the string is queried.
+/// @param[in] name Name of the string to get.
+/// @return
+const char* get_json_string(struct json_object* obj, const char* name)
+{
+ if (!obj || !name || !strlen(name)) return NULL;
+
+ struct json_object* item = NULL;
+ if (!json_object_object_get_ex(obj, name, &item) || !item) return NULL;
+
+ return json_object_get_string(item);
+}
+
+char* make_key(const char* username, const char* appname, const char* tagname)
+{
+ size_t sz_username = username ? strlen(username) : 0;
+ size_t sz_appname = appname ? strlen(appname) : 0;
+ size_t sz_tagname = tagname ? strlen(tagname) : 0;
+ size_t sz_total = sz_username + sz_appname + sz_tagname + 3;
+
+ char* result = (char*)malloc(sz_total);
+ memset(result, sz_total, 0);
+
+ strcpy(result, username);
+ result[sz_username] = '.';
+
+ strcpy(result + sz_username + 1, appname);
+ result[sz_username + 1 + sz_appname] = '.';
+
+ strcpy(result + sz_username + 1 + sz_appname + 1, tagname);
+
+ return result;
+}
+
+static void verb_get(struct afb_req req)
+{
+ int r;
+ struct json_object* args = afb_req_json(req);
+
+ AFB_INFO("args:\n%s\n", json_object_to_json_string_ext(args, JSON_C_TO_STRING_PRETTY));
+
+ const char* username = get_json_string(args, "username");
+ const char* appname = get_json_string(args, "appname");
+ const char* tagname = get_json_string(args, "tagname");
+
+ if (!username || !appname || !tagname)
+ {
+ AFB_ERROR("[store] username, appname and tagname must be provided!");
+ afb_req_fail(req, "username, appname and tagname must be provided!", NULL);
+ return;
+ }
+
+ char* keyname = make_key(username, appname, tagname);
+
+ MDB_txn* txn;
+ r = mdb_txn_begin(dbenv, NULL, 0, &txn);
+ if (r)
+ {
+ free(keyname);
+ AFB_ERROR("Failed to begin a transaction!");
+ afb_req_fail(req, "Failed to begin a transaction!", NULL);
+ return;
+ }
+
+ MDB_dbi dbi;
+ r = mdb_dbi_open(txn, NULL, 0, &dbi);
+ if (r)
+ {
+ free(keyname);
+ mdb_txn_abort(txn);
+ AFB_ERROR("Failed to open the database!");
+ afb_req_fail(req, "Failed to open the database!", NULL);
+ return;
+ }
+
+ MDB_val k;
+ MDB_val v;
+ k.mv_size = strlen(keyname) + 1;
+ k.mv_data = keyname;
+
+ if(mdb_get(txn, dbi, &k, &v))
+ {
+ free(keyname);
+ mdb_txn_abort(txn);
+ mdb_dbi_close(dbenv, dbi);
+ AFB_ERROR("Failed to get the data!");
+ afb_req_fail(req, "Failed to get the data!", NULL);
+ return;
+ }
+
+ char* value = strndup(v.mv_data, v.mv_size + 1);
+ if(mdb_txn_commit(txn))
+ {
+ free(keyname);
+ free(value);
+ mdb_dbi_close(dbenv, dbi);
+ AFB_ERROR("Failed to commit the transaction!");
+ return;
+ }
+
+ json_object* result = json_object_new_object();
+ json_object_object_add(result, "key", json_object_new_string(keyname));
+ json_object_object_add(result, "value", json_object_new_string(value));
+ afb_req_success(req, result, NULL);
+
+ free(value);
+ free(keyname);
+ return;
+}
+
+static void verb_set(struct afb_req req)
+{
+ int r;
+ struct json_object* args = afb_req_json(req);
+
+ AFB_INFO("args:\n%s\n", json_object_to_json_string_ext(args, JSON_C_TO_STRING_PRETTY));
+
+ const char* username = get_json_string(args, "username");
+ const char* appname = get_json_string(args, "appname");
+ const char* tagname = get_json_string(args, "tagname");
+ const char* value = get_json_string(args, "value");
+
+ if (!username || !appname || !tagname)
+ {
+ AFB_ERROR("[store] username, appname and tagname must be provided!");
+ afb_req_fail(req, "username, appname and tagname must be provided!", NULL);
+ return;
+ }
+
+ char* keyname = make_key(username, appname, tagname);
+
+ MDB_txn* txn;
+ r = mdb_txn_begin(dbenv, NULL, 0, &txn);
+ if (r)
+ {
+ free(keyname);
+ AFB_ERROR("Failed to begin a transaction!");
+ afb_req_fail(req, "Failed to begin a transaction!", NULL);
+ return;
+ }
+
+ MDB_dbi dbi;
+ r = mdb_dbi_open(txn, NULL, 0, &dbi);
+ if (r)
+ {
+ free(keyname);
+ mdb_txn_abort(txn);
+ AFB_ERROR("Failed to open the database!");
+ afb_req_fail(req, "Failed to open the database!", NULL);
+ return;
+ }
+
+ MDB_val k;
+ MDB_val v;
+ k.mv_size = strlen(keyname) + 1;
+ k.mv_data = keyname;
+ v.mv_size = value ? strlen(value) + 1 : 0;
+ v.mv_data = value;
+
+ if(mdb_put(txn, dbi, &k, &v, 0))
+ {
+ free(keyname);
+ mdb_txn_abort(txn);
+ mdb_dbi_close(dbenv, dbi);
+ AFB_ERROR("Failed to get the data!");
+ afb_req_fail(req, "Failed to get the data!", NULL);
+ return;
+ }
+
+ if(mdb_txn_commit(txn))
+ {
+ free(keyname);
+ mdb_dbi_close(dbenv, dbi);
+ AFB_ERROR("Failed to commit the transaction!");
+ return;
+ }
+
+ json_object* result = json_object_new_object();
+ json_object_object_add(result, "key", json_object_new_string(keyname));
+ json_object_object_add(result, "value", json_object_new_string(value));
+ afb_req_success(req, result, NULL);
+
+ free(keyname);
+ return;
+}
+
+int ll_store_preinit()
+{
+ int r = mdb_env_create(&dbenv);
+ if (r)
+ {
+ AFB_INFO("Failed to create MDB environment!");
+ dbenv = NULL;
+ return r;
+ }
+
+ r = mdb_env_open(dbenv, "/home/agl/ll-store-binding.lmdb", MDB_NOSUBDIR, 0644);
+ if (r)
+ {
+ mdb_env_close(dbenv);
+ dbenv = NULL;
+ AFB_INFO("Failed to open MDB environment!");
+ return r;
+ }
+
+/*
+ MDB_txn* txn;
+ r = mdb_txn_begin(dbenv, NULL, 0, &txn);
+ if (r)
+ {
+ mdb_env_close(dbenv);
+ dbenv = NULL;
+ AFB_INFO("Failed to begin a transaction!");
+ return r;
+ }
+
+ MDB_dbi dbi;
+ r = mdb_dbi_open(txn, NULL, 0, &dbi);
+ if (r)
+ {
+ mdb_env_close(dbenv);
+ AFB_INFO("Failed to open the database!");
+ dbenv = NULL;
+ }
+*/
+ return 0;
+}
+
+static const afb_verb_v2 _ll_store_binding_verbs[]= {
+ {
+ .verb = "get",
+ .callback = verb_get,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ {
+ .verb = "set",
+ .callback = verb_set,
+ .auth = NULL,
+ .info = NULL,
+ .session = AFB_SESSION_NONE_V2
+ },
+ { .verb=NULL}
+};
+
+const struct afb_binding_v2 afbBindingV2 = {
+ .api = "ll-store",
+ .specification = NULL,
+ .verbs = _ll_store_binding_verbs,
+ .preinit = ll_store_preinit,
+ .init = NULL,
+ .onevent = NULL,
+ .noconcurrency = 0
+};