static int websocket_callback(struct libwebsocket_context *context,struct libwebsocket *wsi,enum libwebsocket_callback_reasons reason, void *user,void *in, size_t len)
{
//printf("Switch: %i\n",reason);
switch (reason)
{
case LWS_CALLBACK_CLIENT_WRITEABLE:
{
//Connection has been established.
//printf("Connection established\n");
break;
}
case LWS_CALLBACK_CLOSED:
{
//Connection is closed, we need to remove all related sinks
sinkManager->disconnectAll(wsi);
/*g_io_
GIOChannel *chan = g_io_channel_unix_new((int)(long)user);
g_io_add_watch(chan,G_IO_IN,(GIOFunc)gioPollingFunc,0);
g_io_add_watch(chan,G_IO_PRI,(GIOFunc)gioPollingFunc,0);
pollfds[count_pollfds].fd = (int)(long)user;
pollfds[count_pollfds].events = (int)len;
// pollfds[count_pollfds++].revents = 0;*/
break;
}
case LWS_CALLBACK_CLIENT_RECEIVE:
{
//printf("Client writable\n");
break;
}
case LWS_CALLBACK_SERVER_WRITEABLE:
{
//printf("Server writable\n");
break;
}
case LWS_CALLBACK_RECEIVE:
{
//printf("Data Received: %s\n",(char*)in);
//The lack of a break; here is intentional.
}
case LWS_CALLBACK_HTTP:
{
//TODO: Verify that ALL requests get sent via LWS_CALLBACK_HTTP, so we can use that instead of LWS_CALLBACK_RECIEVE
//TODO: Do we want exceptions, or just to return an invalid json reply? Probably an invalid json reply.
DebugOut() << __SMALLFILE__ << ":" << __LINE__ << " Requested: " << (char*)in << "\n";
GError* error = nullptr;
JsonParser* parser = json_parser_new();
if (!json_parser_load_from_data(parser,(char*)in,len,&error))
{
DebugOut() << __SMALLFILE__ <<":"<< __LINE__ << "Error loading JSON\n";
return 0;
}
JsonNode* node = json_parser_get_root(parser);
if(node == nullptr)
{
DebugOut() << __SMALLFILE__ <<":"<< __LINE__ << "Error getting root node of json\n";
//throw std::runtime_error("Unable to get JSON root object");
return 0;
}
JsonReader* reader = json_reader_new(node);
if(reader == nullptr)
{
DebugOut() << __SMALLFILE__ <<":"<< __LINE__ << "json_reader is null!\n";
//throw std::runtime_error("Unable to create JSON reader");
return 0;
}
string type;
json_reader_read_member(reader,"type");
type = json_reader_get_string_value(reader);
json_reader_end_member(reader);
string name;
json_reader_read_member(reader,"name");
name = json_reader_get_string_value(reader);
json_reader_end_member(reader);
string id;
json_reader_read_member(reader,"transactionid");
if (strcmp("gchararray",g_type_name(json_node_get_value_type(json_reader_get_value(reader)))) == 0)
{
//Type is a string
id = json_reader_get_string_value(reader);
}
else
{
//Type is an integer
stringstream strstr;
strstr << json_reader_get_int_value(reader);
id = strstr.str();
}
json_reader_end_member(reader);
if (type == "method" && name == "getRanged")
{
json_reader_read_member(reader,"data");
if (json_reader_is_object(reader))
{
double timeBegin;
double timeEnd;
double sequenceBegin;
double sequenceEnd;
string property;
if (json_reader_read_member(reader,"timeBegin"))
{
timeBegin = boost::lexical_cast<double,std::string>(json_reader_get_string_value(reader));
json_reader_end_member(reader);
}
if (json_reader_read_member(reader,"timeEnd"))
{
timeEnd = boost::lexical_cast<double,std::string>(json_reader_get_string_value(reader));
json_reader_end_member(reader);
}
if (json_reader_read_member(reader,"sequenceBegin"))
{
sequenceBegin = boost::lexical_cast<double,std::string>(json_reader_get_string_value(reader));
json_reader_end_member(reader);
}
if (json_reader_read_member(reader,"sequenceEnd"))
{
sequenceEnd = boost::lexical_cast<double,std::string>(json_reader_get_string_value(reader));
json_reader_end_member(reader);
}
if (json_reader_read_member(reader,"property"))
{
property = json_reader_get_string_value(reader);
json_reader_end_member(reader);
}
if ((timeBegin < 0 && timeEnd > 0) || (timeBegin > 0 && timeEnd < 0))
{
//Invalid time begin/end pair
}
if ((sequenceBegin < 0 && sequenceEnd > 0) || (sequenceBegin > 0 && sequenceEnd < 0))
{
//Invalid sequence begin/end pair
}
sinkManager->addSingleShotRangedSink(wsi,property,timeBegin,timeEnd,sequenceBegin,sequenceEnd,id);
}
json_reader_end_member(reader);
}
else
{
vector<string> data;
list<string> key;
list<string> value;
json_reader_read_member(reader,"data");
if (json_reader_is_array(reader))
{
for(int i=0; i < json_reader_count_elements(reader); i++)
{
json_reader_read_element(reader,i);
if (json_reader_is_value(reader))
{
//Raw string value
string path = json_reader_get_string_value(reader);
data.push_back(path);
}
else
{
//Not a raw string value, then it's "property/value" kvp, for "set" requests
json_reader_read_member(reader,"property");
string keystr = json_reader_get_string_value(reader);
key.push_back(keystr);
json_reader_end_member(reader);
json_reader_read_member(reader,"value");
string valuestr = json_reader_get_string_value(reader);
value.push_back(valuestr);
json_reader_end_member(reader);
}
json_reader_end_element(reader);
}
}
else
{
string path = json_reader_get_string_value(reader);
if (path != "")
{
data.push_back(path);
}
}
json_reader_end_member(reader);
if (type == "method")
{
if (name == "get")
{
if (data.size() > 0)
{
//GetProperty is going to be a singleshot sink.
//string arg = arguments.front();
sinkManager->addSingleShotSink(wsi,data.front(),id);
}
else
{
DebugOut() << __SMALLFILE__ << ":" << __LINE__ << " \"get\" method called with no data! Transaction ID:" << id << "\n";
}
}
else if (name == "set")
{
if (data.size() > 0)
{
//Should not happen
}
else if (value.size() > 0)
{
if (key.size() != value.size())
{
DebugOut() << __SMALLFILE__ << ":" << __LINE__ << "\"set\" method called with an invalid key value pair count\n";
}
else
{
list<string>::iterator d = value.begin();
for (list<string>::iterator i=key.begin();i!=key.end();i++)
{
DebugOut() << __SMALLFILE__ << ":" << __LINE__ << "websocketsinkmanager setting" << (*i) << "to" << (*d) << "\n";
//(*i);
sinkManager->setValue((*i),(*d));
//(*d);
d++;
}
}
}
}
else if (name == "subscribe")
{
//Websocket wants to subscribe to an event, data.front();
for (auto i=data.begin();i!=data.end();i++)
{
sinkManager->addSink(wsi,(*i),id);
}
}
else if (name == "unsubscribe")
{
//Websocket wants to unsubscribe to an event, data.front();
for (auto i=data.begin();i!=data.end();i++)
{
sinkManager->removeSink(wsi,(*i),id);
}
}
else if (name == "getSupportedEventTypes")
{
//If data.front() dosen't contain a property name, return a list of properties supported.
//if it does, then return the event types that particular property supports.
string typessupported = "";
if (data.size() == 0)
{
//Send what properties we support
typessupported = "\"running_status_speedometer\",\"running_status_engine_speed\",\"running_status_steering_wheel_angle\",\"running_status_transmission_gear_status\"";
PropertyList foo = sinkManager->getSupportedProperties();
PropertyList::const_iterator i=foo.cbegin();
while (i != foo.cend())
{
typessupported.append(",\"").append((*i)).append("\"");
i++;
}
}
else
{
//Send what events a particular property supports
if (data.front()== "running_status_speedometer")
{
typessupported = "\"get\",\"subscribe\",\"unsubscribe\",\"getSupportedEventTypes\"";
}
else if (data.front()== "running_status_engine_speed")
{
typessupported = "\"get\",\"subscribe\",\"unsubscribe\",\"getSupportedEventTypes\"";
}
else if (data.front() == "running_status_steering_wheel_angle")
{
typessupported = "\"get\",\"subscribe\",\"unsubscribe\",\"getSupportedEventTypes\"";
}
else if (data.front() == "running_status_transmission_gear_status")
{
typessupported = "\"get\",\"subscribe\",\"unsubscribe\",\"getSupportedEventTypes\"";
}
else
{
PropertyList foo = sinkManager->getSupportedProperties();
if (ListPlusPlus<VehicleProperty::Property>(&foo).contains(data.front()))
{
//sinkManager->addSingleShotSink(wsi,data.front(),id);
typessupported = "\"get\",\"subscribe\",\"unsubscribe\",\"getSupportedEventTypes\"";
}
}
}
stringstream s;
string s2;
s << "{\"type\":\"methodReply\",\"name\":\"getSupportedEventTypes\",\"data\":[" << typessupported << "],\"transactionid\":\"" << id << "\"}";
string replystr = s.str();
DebugOut() << __SMALLFILE__ << ":" << __LINE__ << " JSON Reply: " << replystr << "\n";
//printf("Reply: %s\n",replystr.c_str());
char *new_response = new char[LWS_SEND_BUFFER_PRE_PADDING + strlen(replystr.c_str()) + LWS_SEND_BUFFER_POST_PADDING];
new_response+=LWS_SEND_BUFFER_PRE_PADDING;
strcpy(new_response,replystr.c_str());
libwebsocket_write(wsi, (unsigned char*)new_response, strlen(new_response), LWS_WRITE_TEXT);
delete (char*)(new_response-LWS_SEND_BUFFER_PRE_PADDING);
}
else
{
DebugOut(0)<<"Unknown method called."<<endl;
}
}
}
///TODO: this will probably explode:
//mlc: I agree with Kevron here, it does explode.
//if(error) g_error_free(error);
g_object_unref(reader);
g_object_unref(parser);
break;
}
case LWS_CALLBACK_ADD_POLL_FD:
{
//printf("Adding poll %i\n",sinkManager);
//DebugOut() << __SMALLFILE__ <<":"<< __LINE__ << "Adding poll" << (int)sinkManager << "\n";
if (sinkManager != 0)
{
sinkManager->addPoll((int)(long)user);
}
break;
}
case LWS_CALLBACK_DEL_POLL_FD:
{
sinkManager->removePoll((int)(long)user);
break;
}
case LWS_CALLBACK_SET_MODE_POLL_FD:
{
//Set the poll mode
break;
}
case LWS_CALLBACK_CLEAR_MODE_POLL_FD:
{
//Don't handle this yet.
break;
}
default:
{
//printf("Unhandled callback: %i\n",reason);
DebugOut() << __SMALLFILE__ <<":"<< __LINE__ << "Unhandled callback:" << reason << "\n";
break;
}
}
return 0;
}
/* Save key/values on the table in the stack if the value is an
* object or an array, it calls recursively the function again.
*
* @param L, pointer to the L with nil on top of it;
* @param reader, pointed to the first element of main object;
*
* returns: the table in the stack with all json values
*/
static void
build_table_from_json_reader (lua_State *L,
JsonReader *reader)
{
const GError *err = json_reader_get_error (reader);
if (err != NULL) {
GRL_WARNING ("Error when building json: %s", err->message);
return;
}
if (lua_isnil (L, -1)) {
/* In the first execution of this recursive call, the main json object
* does not have a member name. The nil is in the top of the stack and
* it shall be converted to the table with json content */
lua_pop (L, 1);
} else if (lua_istable (L, -1)) {
const gchar *member_name = json_reader_get_member_name (reader);
if (member_name)
lua_pushstring (L, member_name);
} else if (!lua_isnumber (L, -1)) {
GRL_DEBUG ("getting value to either table or array");
return;
}
if (json_reader_is_object (reader)) {
guint index_member = 0;
guint num_members = json_reader_count_members (reader);
lua_createtable (L, num_members, 0);
for (index_member = 0; index_member < num_members; index_member++) {
json_reader_read_element (reader, index_member);
build_table_from_json_reader (L, reader);
json_reader_end_element (reader);
}
} else if (json_reader_is_array (reader)) {
guint index_element = 0;
guint num_elements = json_reader_count_elements (reader);
lua_createtable (L, num_elements, 0);
for (index_element = 0; index_element < num_elements; index_element++) {
json_reader_read_element (reader, index_element);
lua_pushinteger (L, index_element + 1);
build_table_from_json_reader (L, reader);
json_reader_end_element (reader);
}
} else if (json_reader_is_value (reader)) {
if (json_reader_get_null_value (reader)) {
lua_pushnil (L);
} else {
/* value of the element */
JsonNode *value = json_reader_get_value (reader);
switch (json_node_get_value_type (value)) {
case G_TYPE_STRING:
lua_pushstring (L, json_reader_get_string_value (reader));
break;
case G_TYPE_INT64:
lua_pushinteger (L, json_reader_get_int_value (reader));
break;
case G_TYPE_DOUBLE:
lua_pushnumber (L, json_reader_get_double_value (reader));
break;
case G_TYPE_BOOLEAN:
lua_pushnumber (L, json_reader_get_boolean_value (reader));
break;
default:
GRL_DEBUG ("'%d' (json-node-type) is not being handled",
(gint) json_node_get_value_type (value));
lua_pushnil (L);
}
}
}
if (lua_gettop (L) > 3) {
/* save this key/value on previous table */
lua_settable (L, -3);
}
}