/*
- * Copyright (C) 2016 "IoT.bzh"
+ * Copyright (C) 2016, 2017 "IoT.bzh"
* Author "Fulup Ar Foll"
* Author José Bollo <jose.bollo@iot.bzh>
*
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
+#include <errno.h>
-#include "session.h"
+#include "afb-session.h"
#include "verbose.h"
#include "afb-apis.h"
#include "afb-context.h"
+#include "afb-hook.h"
#include <afb/afb-req-itf.h>
struct api_desc {
- struct afb_api api;
const char *name;
- size_t namelen;
+ struct afb_api api;
};
static struct api_desc *apis_array = NULL;
static int apis_count = 0;
-int afb_apis_count()
-{
- return apis_count;
-}
-
+/**
+ * Checks wether 'name' is a valid API name.
+ * @return 1 if valid, 0 otherwise
+ */
int afb_apis_is_valid_api_name(const char *name)
{
unsigned char c;
c = (unsigned char)*name;
if (c == 0)
+ /* empty names aren't valid */
return 0;
+
do {
if (c < (unsigned char)'\x80') {
switch(c) {
return 1;
}
+/**
+ * Adds the api of 'name' described by 'api'.
+ * @param name the name of the api to add (have to survive, not copied!)
+ * @param api the api
+ * @returns 0 in case of success or -1 in case
+ * of error with errno set:
+ * - EINVAL if name isn't valid
+ * - EEXIST if name already registered
+ * - ENOMEM when out of memory
+ */
int afb_apis_add(const char *name, struct afb_api api)
{
struct api_desc *apis;
- int i;
+ int i, c;
/* Checks the api name */
if (!afb_apis_is_valid_api_name(name)) {
ERROR("invalid api name forbidden (name is '%s')", name);
+ errno = EINVAL;
goto error;
}
/* check previously existing plugin */
for (i = 0 ; i < apis_count ; i++) {
- if (!strcasecmp(apis_array[i].name, name)) {
+ c = strcasecmp(apis_array[i].name, name);
+ if (c == 0) {
ERROR("api of name %s already exists", name);
+ errno = EEXIST;
goto error;
}
+ if (c > 0)
+ break;
}
/* allocates enough memory */
apis = realloc(apis_array, ((unsigned)apis_count + 1) * sizeof * apis);
if (apis == NULL) {
ERROR("out of memory");
+ errno = ENOMEM;
goto error;
}
apis_array = apis;
+ /* copy higher part of the array */
+ c = apis_count;
+ while (c > i) {
+ apis_array[c] = apis_array[c - 1];
+ c--;
+ }
+
/* record the plugin */
- apis = &apis_array[apis_count];
+ apis = &apis_array[i];
apis->api = api;
- apis->namelen = strlen(name);
apis->name = name;
apis_count++;
return -1;
}
-void afb_apis_call_(struct afb_req req, struct afb_context *context, const char *api, const char *verb)
-{
- afb_apis_call(req, context, api, strlen(api), verb, strlen(verb));
-}
-
-void afb_apis_call(struct afb_req req, struct afb_context *context, const char *api, size_t lenapi, const char *verb, size_t lenverb)
+/**
+ * Dispatch the request 'req' with the 'context' to the
+ * method of 'api' and 'verb'.
+ * @param req the request to dispatch
+ * @param context the context of the request
+ * @param api the api of the verb
+ * @param verb the verb within the api
+ */
+void afb_apis_call(struct afb_req req, struct afb_context *context, const char *api, const char *verb)
{
- int i;
+ int i, c, up, lo;
const struct api_desc *a;
- a = apis_array;
- for (i = 0 ; i < apis_count ; i++, a++) {
- if (a->namelen == lenapi && !strncasecmp(a->name, api, lenapi)) {
- context->api_index = i;
- a->api.call(a->api.closure, req, context, verb, lenverb);
- return;
+ /* init hooking the request */
+ req = afb_hook_req_call(req, context, api, verb);
+
+ /* dichotomic search of the api */
+ /* initial slice */
+ lo = 0;
+ up = apis_count;
+ for (;;) {
+ /* check remaining slice */
+ if (lo >= up) {
+ /* empty ?! */
+ afb_req_fail(req, "fail", "api not found");
+ break;
+ }
+ /* check the mid of the slice */
+ i = (lo + up) >> 1;
+ a = &apis_array[i];
+ c = strcasecmp(a->name, api);
+ if (c == 0) {
+ /* api found */
+ context->api_key = a->api.closure;
+ a->api.call(a->api.closure, req, context, verb);
+ break;
}
+ /* update the slice */
+ if (c < 0)
+ lo = i + 1;
+ else
+ up = i;
}
- afb_req_fail(req, "fail", "api not found");
}
int afb_apis_start_service(const char *api, int share_session, int onneed)