/*
* 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"
#include
#include
#include
#include
#include
#define AFB_SESSION_JTYPE "AFB_session"
#define AFB_SESSION_JLIST "AFB_sessions"
#define AFB_SESSION_JINFO "AFB_infos"
#define AFB_CURRENT_SESSION "active-session" // file link name within sndcard dir
#define AFB_DEFAULT_SESSION "current-session" // should be in sync with UI
// verify we can read/write in session dir
PUBLIC AFB_error sessionCheckdir (AFB_session *session) {
int err;
// in case session dir would not exist create one
if (verbose) fprintf (stderr, "AFB:notice checking session dir [%s]\n", session->config->sessiondir);
mkdir(session->config->sessiondir, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
// change for session directory
err = chdir(session->config->sessiondir);
if (err) {
fprintf(stderr,"AFB: Fail to chdir to %s error=%s\n", session->config->sessiondir, strerror(err));
return err;
}
// verify we can write session in directory
json_object *dummy= json_object_new_object();
json_object_object_add (dummy, "checked" , json_object_new_int (getppid()));
err = json_object_to_file ("./AFB-probe.json", dummy);
if (err < 0) return err;
return AFB_SUCCESS;
}
// let's return only sessions files
STATIC int fileSelect (const struct dirent *entry) {
return (strstr (entry->d_name, ".afb") != NULL);
}
STATIC json_object *checkCardDirExit (AFB_session *session, AFB_request *request ) {
int sessionDir, cardDir;
// card name should be more than 3 character long !!!!
if (strlen (request->plugin) < 3) {
return (jsonNewMessage (AFB_FAIL,"Fail invalid plugin=%s", request->plugin));
}
// open session directory
sessionDir = open (session->config->sessiondir, O_DIRECTORY);
if (sessionDir < 0) {
return (jsonNewMessage (AFB_FAIL,"Fail to open directory [%s] error=%s", session->config->sessiondir, strerror(sessionDir)));
}
// create session sndcard directory if it does not exit
cardDir = openat (sessionDir, request->plugin, O_DIRECTORY);
if (cardDir < 0) {
cardDir = mkdirat (sessionDir, request->plugin, O_RDWR | S_IRWXU | S_IRGRP);
if (cardDir < 0) {
return (jsonNewMessage (AFB_FAIL,"Fail to create directory [%s/%s] error=%s", session->config->sessiondir, request->plugin, strerror(cardDir)));
}
}
close (sessionDir);
return NULL;
}
// create a session in current directory
PUBLIC json_object *sessionList (AFB_session *session, AFB_request *request) {
json_object *sessionsJ, *ajgResponse;
struct stat fstat;
struct dirent **namelist;
int count, sessionDir;
// if directory for card's sessions does not exist create it
ajgResponse = checkCardDirExit (session, request);
if (ajgResponse != NULL) return ajgResponse;
// open session directory
sessionDir = open (session->config->sessiondir, O_DIRECTORY);
if (sessionDir < 0) {
return (jsonNewMessage (AFB_FAIL,"Fail to open directory [%s] error=%s", session->config->sessiondir, strerror(sessionDir)));
}
count = scandirat (sessionDir, request->plugin, &namelist, fileSelect, alphasort);
close (sessionDir);
if (count < 0) {
return (jsonNewMessage (AFB_FAIL,"Fail to scan sessions directory [%s/%s] error=%s", session->config->sessiondir, request->plugin, strerror(sessionDir)));
}
if (count == 0) return (jsonNewMessage (AFB_EMPTY,"[%s] no session at [%s]", request->plugin, session->config->sessiondir));
// loop on each session file, retrieve its date and push it into json response object
sessionsJ = json_object_new_array();
while (count--) {
json_object *sessioninfo;
char timestamp [64];
char *filename;
// extract file name and last modification date
filename = namelist[count]->d_name;
printf("%s\n", filename);
stat(filename,&fstat);
strftime (timestamp, sizeof(timestamp), "%c", localtime (&fstat.st_mtime));
filename[strlen(filename)-4] = '\0'; // remove .afb extension from filename
// create an object by session with last update date
sessioninfo = json_object_new_object();
json_object_object_add (sessioninfo, "date" , json_object_new_string (timestamp));
json_object_object_add (sessioninfo, "session" , json_object_new_string (filename));
json_object_array_add (sessionsJ, sessioninfo);
free(namelist[count]);
}
// free scandir structure
free(namelist);
// everything is OK let's build final response
ajgResponse = json_object_new_object();
json_object_object_add (ajgResponse, "jtype" , json_object_new_string (AFB_SESSION_JLIST));
json_object_object_add (ajgResponse, "status" , jsonNewStatus(AFB_SUCCESS));
json_object_object_add (ajgResponse, "data" , sessionsJ);
return (ajgResponse);
}
// Create a link toward last used sessionname within sndcard directory
STATIC void makeSessionLink (const char *cardname, const char *sessionname) {
char linkname [256], filename [256];
int err;
// create a link to keep track of last uploaded sessionname for this card
strncpy (filename, sessionname, sizeof(filename));
strncat (filename, ".afb", sizeof(filename));
strncpy (linkname, cardname, sizeof(linkname));
strncat (linkname, "/", sizeof(filename));
strncat (linkname, AFB_CURRENT_SESSION, sizeof(linkname));
strncat (linkname, ".afb", sizeof(filename));
unlink (linkname); // remove previous link if any
err = symlink (filename, linkname);
if (err < 0) fprintf (stderr, "Fail to create link %s->%s error=%s\n", linkname, filename, strerror(errno));
}
// Load Json session object from disk
PUBLIC json_object *sessionFromDisk (AFB_session *session, AFB_request *request, char *name) {
json_object *jsonSession, *jtype, *response;
const char *ajglabel;
char filename [256];
int defsession;
if (name == NULL) {
return (jsonNewMessage (AFB_FATAL,"session name missing &session=MySessionName"));
}
// check for current session request
defsession = (strcmp (name, AFB_DEFAULT_SESSION) ==0);
// if directory for card's sessions does not exist create it
response = checkCardDirExit (session, request);
if (response != NULL) return response;
// add name and file extension to session name
strncpy (filename, request->plugin, sizeof(filename));
strncat (filename, "/", sizeof(filename));
if (defsession) strncat (filename, AFB_CURRENT_SESSION, sizeof(filename)-1);
else strncat (filename, name, sizeof(filename)-1);
strncat (filename, ".afb", sizeof(filename));
// just upload json object and return without any further processing
jsonSession = json_object_from_file (filename);
if (jsonSession == NULL) return (jsonNewMessage (AFB_EMPTY,"File [%s] not found", filename));
// verify that file is a JSON ALSA session type
if (!json_object_object_get_ex (jsonSession, "jtype", &jtype)) {
json_object_put (jsonSession);
return (jsonNewMessage (AFB_EMPTY,"File [%s] 'jtype' descriptor not found", filename));
}
// check type value is AFB_SESSION_JTYPE
ajglabel = json_object_get_string (jtype);
if (strcmp (AFB_SESSION_JTYPE, ajglabel)) {
json_object_put (jsonSession);
return (jsonNewMessage (AFB_FATAL,"File [%s] jtype=[%s] != [%s]", filename, ajglabel, AFB_SESSION_JTYPE));
}
// create a link to keep track of last uploaded session for this card
if (!defsession) makeSessionLink (request->plugin, name);
return (jsonSession);
}
// push Json session object to disk
PUBLIC json_object * sessionToDisk (AFB_session *session, AFB_request *request, char *name, json_object *jsonSession) {
char filename [256];
time_t rawtime;
struct tm * timeinfo;
int err, defsession;
static json_object *response;
// we should have a session name
if (name == NULL) return (jsonNewMessage (AFB_FATAL,"session name missing &session=MySessionName"));
// check for current session request
defsession = (strcmp (name, AFB_DEFAULT_SESSION) ==0);
// if directory for card's sessions does not exist create it
response = checkCardDirExit (session, request);
if (response != NULL) return response;
// add cardname and file extension to session name
strncpy (filename, request->plugin, sizeof(filename));
strncat (filename, "/", sizeof(filename));
if (defsession) strncat (filename, AFB_CURRENT_SESSION, sizeof(filename)-1);
else strncat (filename, name, sizeof(filename)-1);
strncat (filename, ".afb", sizeof(filename)-1);
json_object_object_add(jsonSession, "jtype", json_object_new_string (AFB_SESSION_JTYPE));
// add a timestamp and store session on disk
time ( &rawtime ); timeinfo = localtime ( &rawtime );
// A copy of the string is made and the memory is managed by the json_object
json_object_object_add (jsonSession, "timestamp", json_object_new_string (asctime (timeinfo)));
// do we have extra session info ?
if (request->post) {
static json_object *info, *jtype;
const char *ajglabel;
// extract session info from args
info = json_tokener_parse (request->post);
if (!info) {
response = jsonNewMessage (AFB_FATAL,"sndcard=%s session=%s invalid json args=%s", request->plugin, name, request->post);
goto OnErrorExit;
}
// info is a valid AFB_info type
if (!json_object_object_get_ex (info, "jtype", &jtype)) {
response = jsonNewMessage (AFB_EMPTY,"sndcard=%s session=%s No 'AFB_type' args=%s", request->plugin, name, request->post);
goto OnErrorExit;
}
// check type value is AFB_INFO_JTYPE
ajglabel = json_object_get_string (jtype);
if (strcmp (AFB_SESSION_JINFO, ajglabel)) {
json_object_put (info); // release info json object
response = jsonNewMessage (AFB_FATAL,"File [%s] jtype=[%s] != [%s] data=%s", filename, ajglabel, AFB_SESSION_JTYPE, request->post);
goto OnErrorExit;
}
// this is valid info data for our session
json_object_object_add (jsonSession, "info", info);
}
// Finally save session on disk
err = json_object_to_file (filename, jsonSession);
if (err < 0) {
response = jsonNewMessage (AFB_FATAL,"Fail save session = [%s] to disk", filename);
goto OnErrorExit;
}
// create a link to keep track of last uploaded session for this card
if (!defsession) makeSessionLink (request->plugin, name);
// we're donne let's return status message
response = jsonNewMessage (AFB_SUCCESS,"Session= [%s] saved on disk", filename);
json_object_put (jsonSession);
return (response);
OnErrorExit:
json_object_put (jsonSession);
return response;
}