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/**
* @file
* @author 2012-2013 Stefan Radomski (stefan.radomski@cs.tu-darmstadt.de)
* @copyright Simplified BSD
*
* @cond
* This program is free software: you can redistribute it and/or modify
* it under the terms of the FreeBSD license as published by the FreeBSD
* project.
*
* 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.
*
* You should have received a copy of the FreeBSD license along with this
* program. If not, see <http://www.opensource.org/licenses/bsd-license>.
* @endcond
*/
#include <boost/algorithm/string.hpp>
#include <uscxml/config.h>
#include "XHTMLInvoker.h"
#include <glog/logging.h>
#include "uscxml/DOMUtils.h"
#include <uscxml/plugins/ioprocessor/comet/CometIOProcessor.h>
#include <DOM/io/Stream.hpp>
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
#if __APPLE__
# if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
# else
# include <CoreFoundation/CFBundle.h>
# include <ApplicationServices/ApplicationServices.h>
# endif
#endif
namespace uscxml {
#ifdef BUILD_AS_PLUGINS
PLUMA_CONNECTOR
bool pluginConnect(pluma::Host& host) {
host.add( new XHTMLInvokerProvider() );
return true;
}
#endif
XHTMLInvoker::XHTMLInvoker() {
}
XHTMLInvoker::~XHTMLInvoker() {
HTTPServer::unregisterServlet(this);
};
boost::shared_ptr<InvokerImpl> XHTMLInvoker::create(InterpreterImpl* interpreter) {
boost::shared_ptr<XHTMLInvoker> invoker = boost::shared_ptr<XHTMLInvoker>(new XHTMLInvoker());
invoker->_interpreter = interpreter;
return invoker;
}
bool XHTMLInvoker::httpRecvRequest(const HTTPServer::Request& req) {
tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);
// these are the XHR requests
if (iequals(req.data.at("header").at("X-Requested-With").atom, "XMLHttpRequest")) {
if (iequals(req.data.at("type").atom, "get")) {
// this is the incoming the long-polling GET
if (_longPoll) {
// cancel old longPoller
evhttp_send_error(_longPoll.evhttpReq, 204, NULL);
_longPoll.evhttpReq = NULL;
}
_longPoll = req;
if (!_outQueue.empty()) {
// do we have some send requests pending?
HTTPServer::Reply reply =_outQueue.front();
reply.setRequest(_longPoll);
HTTPServer::reply(reply);
_outQueue.pop_front();
_longPoll.evhttpReq = NULL;
}
return true;
} else {
// an incomping event per POST request
Event ev(req);
if (ev.data["header"].hasKey("X-SCXML-Name")) {
ev.name = ev.data["header"]["X-SCXML-Name"].atom;
} else {
ev.name = req.data.at("type").atom;
}
// initialize data
ev.data = req.data.at("content");
ev.eventType = Event::EXTERNAL;
HTTPServer::Reply reply(req);
HTTPServer::reply(reply);
returnEvent(ev);
return true;
}
}
// initial request for a document
if (!req.data.hasKey("query") && // no query parameters
iequals(req.data.at("type").atom, "get") && // request type is GET
req.content.length() == 0) { // no content
// send template to establish long polling
HTTPServer::Reply reply(req);
// _invokeReq.content will contain the actual content as we needed to replace expressions in the interpreter thread
if (!_invokeReq.data.empty()) {
// just reply with given data as json, this time and for ever
reply.content = _invokeReq.content;
reply.headers["Content-type"] = "application/json";
HTTPServer::reply(reply);
return true;
} else if (_invokeReq.dom) {
// there is some XML given with the content
if (HAS_ATTR_CAST(_invokeReq.dom, "type")) {
// it's special XML to send per Comet later on, default to sending template and enqueue
_longPoll.evhttpReq = NULL;
_outQueue = std::deque<HTTPServer::Reply>();
HTTPServer::Reply reply;
reply.content = _invokeReq.content;
reply.headers["Content-type"] = "application/xml";
_outQueue.push_back(reply);
// no return here - we wan to send the template below
} else {
// it's plain XML now and forever
reply.content = _invokeReq.content;
reply.headers["Content-type"] = "application/xml";
HTTPServer::reply(reply);
return true;
}
} else if (_invokeReq.content.size() > 0) {
// just reply as text this time and for ever
reply.content = _invokeReq.content;
reply.headers["Content-type"] = "text/plain";
HTTPServer::reply(reply);
return true;
}
/*
* Return our template to establish a two way communication via comet
* If we want to replace expressions in the temaplte, we have to do it in invoke()
* for thread safety of the datamodel.
*/
// this file is generated from template/xhtml-invoker.xhtml via xxd
#include "template/xhtml-invoker.inc.h"
// aggressive caching in IE will return all XHR get requests instantenously otherwise
reply.headers["Cache-Control"] = "no-cache";
reply.headers["Content-Type"] = "text/html; charset=utf-8";
reply.content = std::string((const char*)template_xhtml_invoker_html, template_xhtml_invoker_html_len);
HTTPServer::reply(reply);
return true;
}
// don't know what to do with other requests
return false;
}
Data XHTMLInvoker::getDataModelVariables() {
Data data;
return data;
}
void XHTMLInvoker::send(const SendRequest& req) {
tthread::lock_guard<tthread::recursive_mutex> lock(_mutex);
HTTPServer::Reply reply;
if (req.dom) {
// XML
std::stringstream ss;
if (req.dom.getNodeType() == Arabica::DOM::Node_base::ELEMENT_NODE) {
Arabica::DOM::Element<std::string> contentElem = Arabica::DOM::Element<std::string>(req.dom);
if (HAS_ATTR(contentElem, "type"))
reply.headers["X-SCXML-Type"] = ATTR(contentElem, "type");
if (HAS_ATTR(contentElem, "xpath"))
reply.headers["X-SCXML-XPath"] = ATTR(contentElem, "xpath");
if (HAS_ATTR(contentElem, "attr"))
reply.headers["X-SCXML-Attr"] = ATTR(contentElem, "attr");
}
ss << req.dom;
reply.content = ss.str();
reply.headers["Content-Type"] = "application/xml";
} else if (!req.data.empty()) {
// JSON
reply.content = Data::toJSON(req.data);
reply.headers["Content-Type"] = "application/json";
} else if (req.content.length() > 0) {
reply.content = req.content;
reply.headers["Content-Type"] = "text/plain";
}
// TODO: Params to set variables?
_interpreter->getDataModel().replaceExpressions(reply.content);
if (!_longPoll) {
_outQueue.push_back(reply);
return;
}
reply.setRequest(_longPoll);
HTTPServer::reply(reply);
_longPoll.evhttpReq = NULL;
}
void XHTMLInvoker::cancel(const std::string sendId) {
HTTPServer::unregisterServlet(this);
}
void XHTMLInvoker::invoke(const InvokeRequest& req) {
_invokeReq = req;
// make sure _invokeReq.content contains correct and substituted string
if (!_invokeReq.data.empty()) {
_invokeReq.content = Data::toJSON(_invokeReq.data);
} else if (_invokeReq.dom) {
std::stringstream ss;
ss << _invokeReq.dom;
_invokeReq.content = ss.str();
}
_interpreter->getDataModel().replaceExpressions(_invokeReq.content);
std::string browserURL;
if (req.src.size() > 0) {
// no src given, send browser off to some remote url
browserURL = req.src;
} else {
// invoke to talk to us
HTTPServer::registerServlet(_interpreter->getName() + "/" + req.invokeid + ".html", this);
if (_url.size() == 0) {
returnErrorExecution("No HTTP server running");
}
browserURL = _url.c_str();
}
#if __APPLE__
# if TARGET_OS_IPHONE || TARGET_IPHONE_SIMULATOR
# else
// see http://stackoverflow.com/questions/4177744/c-osx-open-default-browser
CFURLRef url = CFURLCreateWithBytes (
NULL, // allocator
(UInt8*)browserURL.c_str(), // URLBytes
browserURL.length(), // length
kCFStringEncodingASCII, // encoding
NULL // baseURL
);
if (LSOpenCFURLRef(url,0) == errSecSuccess) {
if (url)
CFRelease(url);
return;
}
# endif
#endif
#ifdef _WIN32
// see http://support.microsoft.com/kb/224816
ShellExecute(NULL, "open", browserURL.c_str(), NULL, NULL, SW_SHOWNORMAL);
return;
#endif
#ifdef HAS_XDG_OPEN
std::string systemCmd;
systemCmd = "xdg-open ";
systemCmd += browserURL;
if (system(systemCmd.c_str()) >= 0)
return;
#endif
LOG(ERROR) << "Could not open a HTML browser, access '" << browserURL << "' yourself.";
}
}
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