Method runApp

src/server/nc_apps.cpp:481–711

--- RUN APP --- string app_send(string appId, string data)

// --- RUN APP ---
// string app_send(string appId, string data)
bool NCApps::runApp(std::string name, std::string message, uint8_t format, std::string &result) {
	NymphCastApp app = findApp(name);
	if (app.id.empty()) { 
		std::cerr << "Failed to find a matching application for '" << name << "'." << std::endl;
		result = "Failed to find a matching application for '" + name + "'.";
		return false; 
	}
	
	// Update active app ID.
	activeAppMutex.lock();
	activeAppId = name;
	activeAppMutex.unlock();
	
	// Compile the app if it hasn't been compiled yet.
	if (app.asFunction == 0) {
		// Initialise new instance of the app.
		int r;
		
		std::cout << "Loading " << app.id << " app..." << std::endl;

		std::string script;
		int len;
		if (app.location == NYMPHCAST_APP_LOCATION_LOCAL) {
			// We will load the script from a file on the disk.
			FILE *f = fopen((appsFolder + app.url).c_str(), "rb");
			if (f == 0) {
				std::cout << "Failed to open the script file '" << app.url << "'." << std::endl;
				result = "Failed to open the script file.";
				return false;
			}

			// Determine the size of the file	
			fseek(f, 0, SEEK_END);
			len = ftell(f);
			fseek(f, 0, SEEK_SET);

			// On Win32 it is possible to do the following instead
			// int len = _filelength(_fileno(f));

			// Read the entire file
			script.resize(len);
			size_t c = fread(&script[0], len, 1, f);
			fclose(f);

			if (c == 0) {
				std::cerr << "Failed to load script file." << std::endl;
				result = "Failed to load script file.";
				return false;
			}
		}
		else if (app.location == NYMPHCAST_APP_LOCATION_HTTP) {
			// Load the script file from a remote location (HTTP or HTTPS).			
			// Determine whether to call the HTTP or HTTPS function.
			std::string response;
			if (app.url.substr(0, 5) == "https") {
				std::string query = "";
				if (!performHttpsQuery(query, response)) {
					std::cerr << "Error while performing HTTPS query: " << query << std::endl;