--- /dev/null
+/*
+ * Copyright (C) 2016, 2017 "IoT.bzh"
+ * Author José 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 <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <errno.h>
+
+#include <json-c/json.h>
+
+#define AFB_BINDING_VERSION 0
+#include <afb/afb-binding.h>
+
+#include "afb-api.h"
+#include "afb-api-dyn.h"
+#include "afb-apiset.h"
+#include "afb-auth.h"
+#include "afb-export.h"
+#include "afb-xreq.h"
+#include "verbose.h"
+
+/*
+ * Description of a binding
+ */
+struct afb_api_dyn {
+ int count;
+ struct afb_api_dyn_verb **verbs;
+ const struct afb_verb_v2 *verbsv2;
+ struct afb_export *export;
+ char info[1];
+};
+
+void afb_api_dyn_set_verbs_v2(
+ struct afb_api_dyn *dynapi,
+ const struct afb_verb_v2 *verbs)
+{
+ dynapi->verbsv2 = verbs;
+}
+
+int afb_api_dyn_add_verb(
+ struct afb_api_dyn *dynapi,
+ const char *verb,
+ const char *info,
+ void (*callback)(struct afb_request *request),
+ const struct afb_auth *auth,
+ uint32_t session)
+{
+ struct afb_api_dyn_verb *v, **vv;
+
+ vv = realloc(dynapi->verbs, (1 + dynapi->count) * sizeof *vv);
+ if (!vv)
+ goto oom;
+ dynapi->verbs = vv;
+
+ v = malloc(sizeof *v + strlen(verb) + (info ? 1 + strlen(info) : 0));
+ if (!v)
+ goto oom;
+
+ v->callback = callback;
+ v->auth = auth;
+ v->session = session;
+
+ v->info = 1 + stpcpy(v->verb, verb);
+ if (info)
+ strcpy((char*)v->info, info);
+ else
+ v->info = NULL;
+
+ dynapi->verbs[dynapi->count++] = v;
+ return 0;
+oom:
+ errno = ENOMEM;
+ return -1;
+}
+
+int afb_api_dyn_sub_verb(
+ struct afb_api_dyn *dynapi,
+ const char *verb)
+{
+ struct afb_api_dyn_verb *v;
+ int i;
+
+ /* look first in dyna mic verbs */
+ for (i = 0 ; i < dynapi->count ; i++) {
+ v = dynapi->verbs[i];
+ if (!strcasecmp(v->verb, verb)) {
+ if (i != --dynapi->count)
+ dynapi->verbs[i] = dynapi->verbs[dynapi->count];
+ free(v);
+ return 0;
+ }
+ }
+
+ errno = ENOENT;
+ return -1;
+}
+
+static void call_cb(void *closure, struct afb_xreq *xreq)
+{
+ struct afb_api_dyn *dynapi = closure;
+ struct afb_api_dyn_verb **verbs;
+ const struct afb_verb_v2 *verbsv2;
+ int i;
+ const char *name;
+
+ name = xreq->verb;
+ xreq->request.dynapi = (void*)dynapi->export; /* hack: this avoids to export afb_export structure */
+
+ /* look first in dyna mic verbs */
+ verbs = dynapi->verbs;
+ i = dynapi->count;
+ while (i) {
+ if (!strcasecmp(verbs[--i]->verb, name)) {
+ afb_xreq_call_verb_vdyn(xreq, verbs[i]);
+ return;
+ }
+ }
+
+ verbsv2 = dynapi->verbsv2;
+ if (verbsv2) {
+ while (verbsv2->verb) {
+ if (strcasecmp(verbsv2->verb, name))
+ verbsv2++;
+ else {
+ afb_xreq_call_verb_v2(xreq, verbsv2);
+ return;
+ }
+ }
+ }
+
+ afb_xreq_fail_unknown_verb(xreq);
+}
+
+static int service_start_cb(void *closure, int share_session, int onneed, struct afb_apiset *apiset)
+{
+ struct afb_api_dyn *dynapi = closure;
+ return afb_export_start(dynapi->export, share_session, onneed, apiset);
+}
+
+static void update_hooks_cb(void *closure)
+{
+ struct afb_api_dyn *dynapi = closure;
+ afb_export_update_hook(dynapi->export);
+}
+
+static int get_verbosity_cb(void *closure)
+{
+ struct afb_api_dyn *dynapi = closure;
+ return afb_export_verbosity_get(dynapi->export);
+}
+
+static void set_verbosity_cb(void *closure, int level)
+{
+ struct afb_api_dyn *dynapi = closure;
+ afb_export_verbosity_set(dynapi->export, level);
+}
+
+static struct json_object *make_description_openAPIv3(struct afb_api_dyn *dynapi)
+{
+ char buffer[256];
+ struct afb_api_dyn_verb **iter, **end, *verb;
+ struct json_object *r, *f, *a, *i, *p, *g;
+
+ r = json_object_new_object();
+ json_object_object_add(r, "openapi", json_object_new_string("3.0.0"));
+
+ i = json_object_new_object();
+ json_object_object_add(r, "info", i);
+ json_object_object_add(i, "title", json_object_new_string(afb_export_apiname(dynapi->export)));
+ json_object_object_add(i, "version", json_object_new_string("0.0.0"));
+ json_object_object_add(i, "description", json_object_new_string(dynapi->info));
+
+ p = json_object_new_object();
+ json_object_object_add(r, "paths", p);
+ iter = dynapi->verbs;
+ end = iter + dynapi->count;
+ while (iter != end) {
+ verb = *iter++;
+ buffer[0] = '/';
+ strncpy(buffer + 1, verb->verb, sizeof buffer - 1);
+ buffer[sizeof buffer - 1] = 0;
+ f = json_object_new_object();
+ json_object_object_add(p, buffer, f);
+ g = json_object_new_object();
+ json_object_object_add(f, "get", g);
+
+ a = afb_auth_json_v2(verb->auth, verb->session);
+ if (a)
+ json_object_object_add(g, "x-permissions", a);
+
+ a = json_object_new_object();
+ json_object_object_add(g, "responses", a);
+ f = json_object_new_object();
+ json_object_object_add(a, "200", f);
+ json_object_object_add(f, "description", json_object_new_string(verb->info?:verb->verb));
+ }
+ return r;
+}
+
+static struct json_object *describe_cb(void *closure)
+{
+ struct afb_api_dyn *dynapi = closure;
+ struct json_object *r = make_description_openAPIv3(dynapi);
+ return r;
+}
+
+static struct afb_api_itf dyn_api_itf = {
+ .call = call_cb,
+ .service_start = service_start_cb,
+ .update_hooks = update_hooks_cb,
+ .get_verbosity = get_verbosity_cb,
+ .set_verbosity = set_verbosity_cb,
+ .describe = describe_cb
+};
+
+int afb_api_dyn_add(struct afb_apiset *apiset, const char *name, const char *info, int (*preinit)(void*, struct afb_dynapi*), void *closure)
+{
+ int rc;
+ struct afb_api_dyn *dynapi;
+ struct afb_api afb_api;
+ struct afb_export *export;
+
+ INFO("Starting creation of dynamic API %s", name);
+
+ /* allocates the description */
+ info = info ?: "";
+ dynapi = calloc(1, sizeof *dynapi + strlen(info));
+ export = afb_export_create_vdyn(apiset, name, dynapi);
+ if (!dynapi || !export) {
+ ERROR("out of memory");
+ goto error;
+ }
+ strcpy(dynapi->info, info);
+ dynapi->export = export;
+
+ /* preinit the api */
+ rc = afb_export_preinit_vdyn(export, preinit, closure);
+ if (rc < 0) {
+ ERROR("dynamic api %s preinit function failed, ABORTING it!",
+ afb_export_apiname(dynapi->export));
+ goto error;
+ }
+
+ /* records the binding */
+ afb_api.closure = dynapi;
+ afb_api.itf = &dyn_api_itf;
+ afb_api.group = NULL;
+ if (afb_apiset_add(apiset, afb_export_apiname(dynapi->export), afb_api) < 0) {
+ ERROR("dynamic api %s can't be registered to set %s, ABORTING it!",
+ afb_export_apiname(dynapi->export),
+ afb_apiset_name(apiset));
+ goto error;
+ }
+ INFO("binding %s added to set %s", afb_export_apiname(dynapi->export), afb_apiset_name(apiset));
+ return 1;
+
+error:
+ afb_export_destroy(export);
+ free(dynapi);
+
+ return -1;
+}
+
Code Review / src / app-framework-binder.git / blobdiff