afb-svc: make service existing during its initialisation
[src/app-framework-binder.git] / src / afb-api-so-v2.c
index 6ac1fa7..038f1ce 100644 (file)
  */
 
 #define _GNU_SOURCE
-#define NO_BINDING_VERBOSE_MACRO
+#define AFB_BINDING_PRAGMA_NO_VERBOSE_MACRO
 
+#include <stdlib.h>
 #include <string.h>
 #include <dlfcn.h>
 #include <assert.h>
 
-#include <afb/afb-binding.h>
+#include <afb/afb-binding-v2.h>
+#include <json-c/json.h>
 
 #include "afb-api.h"
+#include "afb-api-so-v2.h"
 #include "afb-apiset.h"
 #include "afb-svc.h"
 #include "afb-ditf.h"
 #include "afb-context.h"
 #include "afb-api-so.h"
 #include "afb-xreq.h"
+#include "jobs.h"
 #include "verbose.h"
 
 /*
  * names of symbols
  */
 static const char afb_api_so_v2_descriptor[] = "afbBindingV2";
+static const char afb_api_so_v2_data[] = "afbBindingV2data";
 
 /*
  * Description of a binding
  */
 struct api_so_v2 {
-       struct afb_binding_v2 *binding; /* descriptor */
+       const struct afb_binding_v2 *binding;   /* descriptor */
+       struct afb_binding_data_v2 *data;       /* data */
        void *handle;                   /* context of dlopen */
        struct afb_svc *service;        /* handler for service started */
        struct afb_ditf ditf;           /* daemon interface */
 };
 
-static const struct afb_verb_v2 *search(struct api_so_v2 *desc, const char *verb)
+static const struct afb_verb_v2 *search(struct api_so_v2 *desc, const char *name)
 {
-       const struct afb_verb_v2 *result;
+       const struct afb_verb_v2 *verb;
 
-       result = desc->binding->verbs;
-       while (result->verb && strcasecmp(result->verb, verb))
-               result++;
-       return result->verb ? result : NULL;
+       verb = desc->binding->verbs;
+       while (verb->verb && strcasecmp(verb->verb, name))
+               verb++;
+       return verb->verb ? verb : NULL;
+       return NULL;
 }
 
 static void call_cb(void *closure, struct afb_xreq *xreq)
@@ -66,16 +73,38 @@ static void call_cb(void *closure, struct afb_xreq *xreq)
        const struct afb_verb_v2 *verb;
 
        verb = search(desc, xreq->verb);
-       if (!verb)
-               afb_xreq_fail_unknown_verb(xreq);
-       else
-               if (!xreq_session_check_apply(xreq, verb->session))
-                       afb_xreq_call(xreq, verb->callback);
+       afb_xreq_call_verb_v2(xreq, verb);
+}
+
+struct call_sync
+{
+       struct api_so_v2 *desc;
+       struct afb_xreq *xreq;
+};
+
+static void call_sync_cb_cb(int signum, void *closure)
+{
+       struct call_sync *cs = closure;
+       if (!signum)
+               call_cb(cs->desc, cs->xreq);
+       else  {
+               if (!cs->xreq->replied)
+                       afb_xreq_fail(cs->xreq, "aborted", "internal error");
+       }
+}
+
+static void call_sync_cb(void *closure, struct afb_xreq *xreq)
+{
+       struct call_sync cs = { .desc = closure, .xreq = xreq };
+
+       if (jobs_call(closure, 0, call_sync_cb_cb, &cs))
+               call_cb(closure, xreq);
 }
 
 static int service_start_cb(void *closure, int share_session, int onneed, struct afb_apiset *apiset)
 {
-       int (*start)(const struct afb_binding_interface *interface, struct afb_service service);
+       int rc;
+       int (*start)();
        void (*onevent)(const char *event, struct json_object *object);
 
        struct api_so_v2 *desc = closure;
@@ -92,8 +121,9 @@ static int service_start_cb(void *closure, int share_session, int onneed, struct
        }
 
        /* get the initialisation */
-       start = desc->binding->start;
-       if (start == NULL) {
+       start = desc->binding->init;
+       onevent = desc->binding->onevent;
+       if (start == NULL && onevent == NULL) {
                /* not an error when onneed */
                if (onneed != 0)
                        return 0;
@@ -104,14 +134,24 @@ static int service_start_cb(void *closure, int share_session, int onneed, struct
        }
 
        /* get the event handler if any */
-       onevent = desc->binding->onevent;
-       desc->service = afb_svc_create_v2(apiset, share_session, onevent, start, &desc->ditf.interface);
+       desc->service = afb_svc_create(desc->binding->api, apiset, share_session, onevent, &desc->data->service);
        if (desc->service == NULL) {
                /* starting error */
                ERROR("Starting service %s failed", desc->binding->api);
                return -1;
        }
 
+       /* Starts the service */
+       rc = afb_svc_start_v2(desc->service, start);
+       if (rc < 0) {
+               /* initialisation error */
+               ERROR("Initialisation of service %s failed (%d): %m", desc->binding->api, rc);
+               afb_svc_destroy(desc->service, &desc->data->service);
+               desc->service = NULL;
+               return rc;
+       }
+
+
        return 0;
 }
 
@@ -119,18 +159,116 @@ static void update_hooks_cb(void *closure)
 {
        struct api_so_v2 *desc = closure;
        afb_ditf_update_hook(&desc->ditf);
+       if (desc->service)
+               afb_svc_update_hook(desc->service);
 }
 
 static int get_verbosity_cb(void *closure)
 {
        struct api_so_v2 *desc = closure;
-       return desc->ditf.interface.verbosity;
+       return desc->data->verbosity;
 }
 
 static void set_verbosity_cb(void *closure, int level)
 {
        struct api_so_v2 *desc = closure;
-       desc->ditf.interface.verbosity = level;
+       desc->data->verbosity = level;
+}
+
+static struct json_object *addperm(struct json_object *o, struct json_object *x)
+{
+       struct json_object *a;
+
+       if (!o)
+               return x;
+
+       if (!json_object_object_get_ex(o, "allOf", &a)) {
+               a = json_object_new_array();
+               json_object_array_add(a, o);
+               o = json_object_new_object();
+               json_object_object_add(o, "allOf", a);
+       }
+       json_object_array_add(a, x);
+       return o;
+}
+
+static struct json_object *addperm_key_val(struct json_object *o, const char *key, struct json_object *val)
+{
+       struct json_object *x = json_object_new_object();
+       json_object_object_add(x, key, val);
+       return addperm(o, x);
+}
+
+static struct json_object *addperm_key_valstr(struct json_object *o, const char *key, const char *val)
+{
+       return addperm_key_val(o, key, json_object_new_string(val));
+}
+
+static struct json_object *addperm_key_valint(struct json_object *o, const char *key, int val)
+{
+       return addperm_key_val(o, key, json_object_new_int(val));
+}
+
+static struct json_object *make_description_openAPIv3(struct api_so_v2 *desc)
+{
+       char buffer[256];
+       const struct afb_verb_v2 *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(desc->binding->api));
+       json_object_object_add(i, "version", json_object_new_string("0.0.0"));
+       json_object_object_add(i, "description", json_object_new_string(desc->binding->info ?: desc->binding->api));
+
+       p = json_object_new_object();
+       json_object_object_add(r, "paths", p);
+       verb = desc->binding->verbs;
+       while (verb->verb) {
+               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 = NULL;
+               if (verb->session & AFB_SESSION_CLOSE_V2)
+                       a = addperm_key_valstr(a, "session", "close");
+               if (verb->session & AFB_SESSION_CHECK_V2)
+                       a = addperm_key_valstr(a, "session", "check");
+               if (verb->session & AFB_SESSION_REFRESH_V2)
+                       a = addperm_key_valstr(a, "token", "refresh");
+               if (verb->session & AFB_SESSION_LOA_MASK_V2)
+                       a = addperm_key_valint(a, "LOA", verb->session & AFB_SESSION_LOA_MASK_V2);
+#if 0
+               if (verb->auth)
+                       a = 
+#endif
+               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));
+               verb++;
+       }
+       return r;
+}
+
+static struct json_object *describe_cb(void *closure)
+{
+       struct api_so_v2 *desc = closure;
+       struct json_object *r = desc->binding->specification ? json_tokener_parse(desc->binding->specification) : NULL;
+       if (!r)
+               r = make_description_openAPIv3(desc);
+       return r;
 }
 
 static struct afb_api_itf so_v2_api_itf = {
@@ -138,19 +276,30 @@ static struct afb_api_itf so_v2_api_itf = {
        .service_start = service_start_cb,
        .update_hooks = update_hooks_cb,
        .get_verbosity = get_verbosity_cb,
-       .set_verbosity = set_verbosity_cb
+       .set_verbosity = set_verbosity_cb,
+       .describe = describe_cb
+};
+
+static struct afb_api_itf so_v2_sync_api_itf = {
+       .call = call_sync_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_so_v2_add_binding(struct afb_binding_v2 *binding, void *handle, struct afb_apiset *apiset)
+int afb_api_so_v2_add_binding(const struct afb_binding_v2 *binding, void *handle, struct afb_apiset *apiset, struct afb_binding_data_v2 *data)
 {
        int rc;
        struct api_so_v2 *desc;
        struct afb_api afb_api;
 
        /* basic checks */
+       assert(binding);
        assert(binding->api);
-       assert(binding->specification);
        assert(binding->verbs);
+       assert(data);
 
        /* allocates the description */
        desc = calloc(1, sizeof *desc);
@@ -159,29 +308,32 @@ int afb_api_so_v2_add_binding(struct afb_binding_v2 *binding, void *handle, stru
                goto error;
        }
        desc->binding = binding;
+       desc->data = data;
        desc->handle = handle;
+       desc->service = NULL;
 
        /* init the interface */
-       afb_ditf_init(&desc->ditf, binding->api);
+       desc->data->verbosity = verbosity;
+       afb_ditf_init_v2(&desc->ditf, binding->api, data);
 
        /* init the binding */
-       if (binding->init) {
-               INFO("binding %s calling init function", binding->api);
-               rc = binding->init(&desc->ditf.interface);
+       if (binding->preinit) {
+               INFO("binding %s calling preinit function", binding->api);
+               rc = binding->preinit();
                if (rc < 0) {
-                       ERROR("binding %s initialisation function failed...", binding->api);
+                       ERROR("binding %s preinit function failed...", binding->api);
                        goto error2;
                }
        }
 
        /* records the binding */
        afb_api.closure = desc;
-       afb_api.itf = &so_v2_api_itf;
+       afb_api.itf = binding->noconcurrency ? &so_v2_sync_api_itf : &so_v2_api_itf;
        if (afb_apiset_add(apiset, binding->api, afb_api) < 0) {
                ERROR("binding %s can't be registered to set %s...", binding->api, afb_apiset_name(apiset));
                goto error2;
        }
-       NOTICE("binding %s added to set %s", binding->api, afb_apiset_name(apiset));
+       INFO("binding %s added to set %s", binding->api, afb_apiset_name(apiset));
        return 1;
 
 error2:
@@ -192,16 +344,23 @@ error:
 
 int afb_api_so_v2_add(const char *path, void *handle, struct afb_apiset *apiset)
 {
-       struct afb_binding_v2 *binding;
+       const struct afb_binding_v2 *binding;
+       struct afb_binding_data_v2 *data;
 
        /* retrieves the register function */
        binding = dlsym(handle, afb_api_so_v2_descriptor);
-       if (!binding)
+       data = dlsym(handle, afb_api_so_v2_data);
+       if (!binding && !data)
                return 0;
 
        INFO("binding [%s] looks like an AFB binding V2", path);
 
        /* basic checks */
+       if (!binding || !data) {
+               ERROR("binding [%s] incomplete symbol set: %s is missing",
+                       path, binding ? afb_api_so_v2_data : afb_api_so_v2_descriptor);
+               goto error;
+       }
        if (binding->api == NULL || *binding->api == 0) {
                ERROR("binding [%s] bad api name...", path);
                goto error;
@@ -210,16 +369,18 @@ int afb_api_so_v2_add(const char *path, void *handle, struct afb_apiset *apiset)
                ERROR("binding [%s] invalid api name...", path);
                goto error;
        }
+#if 0
        if (binding->specification == NULL || *binding->specification == 0) {
                ERROR("binding [%s] bad specification...", path);
                goto error;
        }
+#endif
        if (binding->verbs == NULL) {
                ERROR("binding [%s] no verbs...", path);
                goto error;
        }
 
-       return afb_api_so_v2_add_binding(binding, handle, apiset);
+       return afb_api_so_v2_add_binding(binding, handle, apiset, data);
 
  error:
        return -1;