/* * 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 . */ #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; int res; char *token; AFB_clientCtx *client=request->client; // get client context from request // check we do not already have a session if ((client != NULL) && (client->ctx != NULL)) { request->errcode=MHD_HTTP_FORBIDDEN; return (jsonNewMessage(AFB_FAIL, "Token exist use refresh")); } // request a new client context token and check result if (AFB_UNAUTH == ctxTokenCreate (request)) { request->errcode=MHD_HTTP_UNAUTHORIZED; jresp= jsonNewMessage(AFB_FAIL, "No/Invalid initial token provided [should match --token=xxxx]"); return (jresp); } // request a new client context token and check result if (AFB_SUCCESS != ctxTokenCreate (request)) { request->errcode=MHD_HTTP_UNAUTHORIZED; jresp= jsonNewMessage(AFB_FAIL, "Token Session Not Activated [restart with --token=xxxx]"); return (jresp); } // add a client context to session client->ctx = malloc (sizeof (MyClientApplicationHandle)); // Send response to UI jresp = json_object_new_object(); json_object_object_add(jresp, "token", json_object_new_string (client->token)); return (jresp); } // Renew an existing context STATIC json_object* clientContextRefresh (AFB_request *request) { json_object *jresp; // note: we do not need to parse the old token as clientContextRefresh doit for us if (AFB_SUCCESS != ctxTokenRefresh (request)) { request->errcode=MHD_HTTP_UNAUTHORIZED; jresp= jsonNewMessage(AFB_FAIL, "Token Exchange Broken Refresh Refused"); } else { jresp = json_object_new_object(); json_object_object_add(jresp, "token", json_object_new_string (request->client->token)); } return (jresp); } // Verify a context is still valid STATIC json_object* clientContextCheck (AFB_request *request) { json_object *jresp = json_object_new_object(); // add an error code to respond if (AFB_SUCCESS != ctxTokenCheck (request)) { request->errcode=MHD_HTTP_UNAUTHORIZED; json_object_object_add(jresp, "isvalid", json_object_new_boolean (FALSE)); } else { 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; // note: we do not need to parse the old token as clientContextRefresh doit for us if (AFB_SUCCESS != ctxTokenReset (request)) { request->errcode=MHD_HTTP_UNAUTHORIZED; jresp= jsonNewMessage(AFB_FAIL, "No Token Client Context [use --token=xxx]"); } else { 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;; int fd = (int)postHandle->handle; close (fd); if (verbose) fprintf ("DonePostForm filename=%s upload done\n", form->filename); } // WARNING: PostForm callback are call one type for form value STATIC AFB_error ProcessPostForm (AFB_request *request, AFB_PostItem *item) { AFB_PostHandle *postHandle; appPostCtx *appCtx; // When Post is fully processed the same callback is call with a item==NULL if (item == NULL) { return(jsonNewMessage(AFB_SUCESS,"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) { 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; } // Check this is a file element if (0 != strcmp (item->key, "file")) { request->errcode = MHD_HTTP_FORBIDDEN; request.jresp = jsonNewMessage(AFB_FAIL,"No File within element key=%s\n", item->key); return AFB_FAIL; } // This is the 1st Item iteration let's open output file and allocate necessary resources if (postHandle->handle == NULL) { 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; request->jresp = jsonNewMessage(AFB_FAIL,"Fail to Upload file [%s] at [%s] error=\n", item->filename, request->config->sessiondir, strerror(errno)); return AFB_FAIL; }; // keep track of file handle with item appCtx = malloc (size(appPostCtx)); // May place anything here until post->completeCB handle resources liberation postHandle->handle = malloc (size(appPostCtx)); // May place anything here until post->completeCB handle resources liberation postHandle->completeCB = DonePostForm; // CallBack when Form Processing is finished } else { // this is not the call, FD is already open fd = (int)post->handle; } // We have something to write if (item.len > 0) { if (!write (fd, item->data, item->len)) { request->errcode = MHD_HTTP_FORBIDDEN; request->json = jsonNewMessage(AFB_FAIL,"Fail to write file [%s] at [%s] error=\n", item->filename, strerror(errno)); return AFB_FAIL; } } // every event should return Sucess or Form processing stop return AFB_SUCCESS; } // 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_apiCB)apiPingTest ,"Ping Rest Test Service"}, {"token-create" , (AFB_apiCB)clientContextCreate ,"Request Client Context Creation"}, {"token-refresh" , (AFB_apiCB)clientContextRefresh,"Refresh Client Context Token"}, {"token-check" , (AFB_apiCB)clientContextCheck ,"Check Client Context Token"}, {"token-reset" , (AFB_apiCB)clientContextReset ,"Close Client Context and Free resources"}, {"file-upload" , (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); };