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/*
* Copyright (C) 2015 "IoT.bzh"
* Author "Fulup Ar Foll"
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "local-def.h"
// Dummy sample of Client Application Context
typedef struct {
int something;
void *whateveryouwant;
} MyClientApplicationHandle;
// Request Creation of new context if it does not exist
STATIC json_object* clientContextCreate (AFB_request *request) {
json_object *jresp;
// add an application specific client context to session
request->client->ctx = malloc (sizeof (MyClientApplicationHandle));
// Send response to UI
jresp = json_object_new_object();
json_object_object_add(jresp, "token", json_object_new_string ("A New Token and Session Context Was Created"));
return (jresp);
}
// Before entering here token will be check and renew
STATIC json_object* clientContextRefresh (AFB_request *request) {
json_object *jresp;
jresp = json_object_new_object();
json_object_object_add(jresp, "token", json_object_new_string ("Token was refreshed"));
return (jresp);
}
// Session token will we verified before entering here
STATIC json_object* clientContextCheck (AFB_request *request) {
json_object *jresp = json_object_new_object();
json_object_object_add(jresp, "isvalid", json_object_new_boolean (TRUE));
return (jresp);
}
// Close and Free context
STATIC json_object* clientContextReset (AFB_request *request) {
json_object *jresp;
jresp = json_object_new_object();
json_object_object_add(jresp, "uuid", json_object_new_string (request->client->uuid));
return (jresp);
}
// In this case or handle is quite basic
typedef struct {
int fd;
} appPostCtx;
// This function is call when PostForm processing is completed
STATIC void DonePostForm (AFB_request *request) {
AFB_PostHandle *postHandle = (AFB_PostHandle*)request->post->data;
appPostCtx *appCtx= postHandle->ctx;
// Close upload file ID
close (appCtx->fd);
// Free application specific handle
free (postHandle->ctx);
if (verbose) fprintf (stderr, "DonePostForm upload done\n");
}
// WARNING: PostForm callback are call multiple time (one or each key within form)
// When processing POST_JSON request->data hold a PostHandle and not data directly as for POST_JSON
STATIC json_object* ProcessPostForm (AFB_request *request, AFB_PostItem *item) {
AFB_PostHandle *postHandle;
appPostCtx *appCtx;
char filepath[512];
// When Post is fully processed the same callback is call with a item==NULL
if (item == NULL) {
// Close file, Free handle
request->errcode = MHD_HTTP_OK;
return(jsonNewMessage(AFB_SUCCESS,"File [%s] uploaded at [%s] error=\n", item->filename, request->config->sessiondir));
}
// Let's make sure this is a valid PostForm request
if (!request->post && request->post->type != AFB_POST_FORM) {
request->errcode = MHD_HTTP_FORBIDDEN;
return(jsonNewMessage(AFB_FAIL,"This is not a valid PostForm request\n"));
} else {
// In AFB_POST_FORM case post->data is a PostForm handle
postHandle = (AFB_PostHandle*) request->post->data;
appCtx = (appPostCtx*) postHandle->ctx;
}
// Check this is a file element
if (0 != strcmp (item->key, "file")) {
request->errcode = MHD_HTTP_FORBIDDEN;
return (jsonNewMessage(AFB_FAIL,"No File within element key=%s\n", item->key));
}
// This is the 1st Item iteration let's open output file and allocate necessary resources
if (postHandle->ctx == NULL) {
int fd;
strncpy (filepath, request->config->sessiondir, sizeof(filepath));
strncat (filepath, "/", sizeof(filepath));
strncat (filepath, item->filename, sizeof(filepath));
if((fd = open(request->config->sessiondir, O_RDONLY)) < 0) {
request->errcode = MHD_HTTP_FORBIDDEN;
return (jsonNewMessage(AFB_FAIL,"Fail to Upload file [%s] at [%s] error=\n", item->filename, request->config->sessiondir, strerror(errno)));
};
// Create an application specific context
appCtx = malloc (sizeof(appPostCtx)); // May place anything here until post->completeCB handle resources liberation
appCtx->fd = fd;
// attach application to postHandle
postHandle->ctx = (void*) appCtx; // May place anything here until post->completeCB handle resources liberation
postHandle->completeCB = (AFB_apiCB)DonePostForm; // CallBack when Form Processing is finished
} else {
// this is not the call, FD is already open
appCtx = (appPostCtx*) postHandle->ctx;
}
// We have something to write
if (item->len > 0) {
if (!write (appCtx->fd, item->data, item->len)) {
request->errcode = MHD_HTTP_FORBIDDEN;
return (jsonNewMessage(AFB_FAIL,"Fail to write file [%s] at [%s] error=\n", item->filename, strerror(errno)));
}
}
// every event should return Sucess or Form processing stop
request->errcode = MHD_HTTP_OK;
return NULL;
}
// This function is call when Client Session Context is removed
// Note: when freeCtxCB==NULL standard free/malloc is called
STATIC void clientContextFree(AFB_clientCtx *client) {
fprintf (stderr,"Plugin[%s] Closing Session uuid=[%s]\n", client->plugin->prefix, client->uuid);
free (client->ctx);
}
STATIC AFB_restapi pluginApis[]= {
{"ping" , AFB_SESSION_NONE , (AFB_apiCB)apiPingTest ,"Ping Rest Test Service"},
{"token-create" , AFB_SESSION_CREATE, (AFB_apiCB)clientContextCreate ,"Request Client Context Creation"},
{"token-refresh" , AFB_SESSION_RENEW , (AFB_apiCB)clientContextRefresh,"Refresh Client Context Token"},
{"token-check" , AFB_SESSION_CHECK , (AFB_apiCB)clientContextCheck ,"Check Client Context Token"},
{"token-reset" , AFB_SESSION_CLOSE , (AFB_apiCB)clientContextReset ,"Close Client Context and Free resources"},
{"file-upload" , AFB_SESSION_NONE , (AFB_apiCB)ProcessPostForm ,"Demo for file upload"},
{NULL}
};
PUBLIC AFB_plugin *afsvRegister () {
AFB_plugin *plugin = malloc (sizeof (AFB_plugin));
plugin->type = AFB_PLUGIN_JSON;
plugin->info = "Application Framework Binder Service";
plugin->prefix= "afbs"; // url base
plugin->apis = pluginApis;
plugin->handle= (void*) "What ever you want";
plugin->freeCtxCB= (void*) clientContextFree;
return (plugin);
};
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