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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 "RespondElement.h"
#include "uscxml/plugins/invoker/http/HTTPServletInvoker.h"
#include "uscxml/server/InterpreterServlet.h"
#include "uscxml/DOMUtils.h"
#include <glog/logging.h>
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
#ifdef BUILD_AS_PLUGINS
PLUMA_CONNECTOR
bool pluginConnect(pluma::Host& host) {
host.add( new RespondElementProvider() );
return true;
}
#endif
boost::shared_ptr<ExecutableContentImpl> RespondElement::create(InterpreterImpl* interpreter) {
boost::shared_ptr<RespondElement> invoker = boost::shared_ptr<RespondElement>(new RespondElement());
invoker->_interpreter = interpreter;
return invoker;
}
void RespondElement::enterElement(const Arabica::DOM::Node<std::string>& node) {
// try to get the request id
if (!HAS_ATTR(node, "to")) {
LOG(ERROR) << "Respond element requires to attribute";
return;
}
if (HAS_ATTR(node, "to") && !_interpreter->getDataModel()) {
LOG(ERROR) << "Respond element with to requires datamodel";
return;
}
std::string requestId = _interpreter->getDataModel().evalAsString(ATTR(node, "to"));
// try to get the request object
InterpreterHTTPServlet* servlet = _interpreter->getHTTPServlet();
tthread::lock_guard<tthread::recursive_mutex> lock(servlet->getMutex());
if (servlet->getRequests().find(requestId) == servlet->getRequests().end()) {
LOG(ERROR) << "No matching HTTP request for respond element";
return;
}
assert(servlet->getRequests().find(requestId) != servlet->getRequests().end());
HTTPServer::Request httpReq = servlet->getRequests()[requestId];
assert(httpReq.evhttpReq != NULL);
HTTPServer::Reply httpReply(httpReq);
servlet->getRequests().erase(requestId);
// get the status or default to 200
std::string statusStr = (HAS_ATTR(node, "status") ? ATTR(node, "status") : "200");
if (!isNumeric(statusStr.c_str(), 10)) {
LOG(ERROR) << "Respond element with non-numeric status " << statusStr;
return;
}
httpReply.status = strTo<int>(statusStr);;
// extract the content
Arabica::XPath::NodeSet<std::string> contents = InterpreterImpl::filterChildElements(_interpreter->getNameSpaceInfo().getXMLPrefixForNS(getNamespace()) + "content", node);
if (contents.size() > 0) {
if (HAS_ATTR(contents[0], "expr")) { // -- content is evaluated string from datamodel ------
if (_interpreter->getDataModel()) {
try {
Data contentData = _interpreter->getDataModel().getStringAsData(ATTR(contents[0], "expr"));
if (contentData.atom.length() > 0) {
httpReply.content = contentData.atom;
httpReply.headers["Content-Type"] = "text/plain";
} else if (contentData.binary) {
httpReply.content = std::string(contentData.binary.getData(), contentData.binary.getSize());
httpReply.headers["Content-Type"] = contentData.binary.getMimeType();
} else if (contentData.node) {
std::stringstream ss;
ss << contentData.node;
httpReply.content = ss.str();;
httpReply.headers["Content-Type"] = "application/xml";
} else {
httpReply.content = Data::toJSON(contentData);
httpReply.headers["Content-Type"] = "application/json";
}
} catch (Event e) {
LOG(ERROR) << "Syntax error with expr in content child of Respond element:" << std::endl << e << std::endl;
return;
}
} else {
LOG(ERROR) << "content element has expr attribute but no datamodel is specified.";
return;
}
} else if (HAS_ATTR(contents[0], "file") || HAS_ATTR(contents[0], "fileexpr")) { // -- content is from file ------
URL file;
if (HAS_ATTR(contents[0], "fileexpr")) {
if (_interpreter->getDataModel()) {
try {
file = "file://" + _interpreter->getDataModel().evalAsString(ATTR(contents[0], "fileexpr"));
} catch (Event e) {
LOG(ERROR) << "Syntax error with fileexpr in content child of Respond element:" << std::endl << e << std::endl;
return;
}
}
} else {
file = "file://" + ATTR(contents[0], "fileexpr");
}
if (file) {
httpReply.content = file.getInContent();
size_t lastDot;
if ((lastDot = file.path().find_last_of(".")) != std::string::npos) {
std::string extension = file.path().substr(lastDot + 1);
std::string mimeType = URL::getMimeType(extension);
if (mimeType.length() > 0) {
httpReply.headers["Content-Type"] = mimeType;
}
}
}
} else if (contents[0].hasChildNodes()) { // -- content embedded as child nodes ------
httpReply.content = contents[0].getFirstChild().getNodeValue();
} else {
LOG(ERROR) << "content element does not specify any content.";
return;
}
}
// process headers
Arabica::XPath::NodeSet<std::string> headers = InterpreterImpl::filterChildElements(_interpreter->getNameSpaceInfo().getXMLPrefixForNS(getNamespace()) + "header", node);
for (int i = 0; i < headers.size(); i++) {
std::string name;
if (HAS_ATTR(headers[i], "name")) {
name = ATTR(headers[i], "name");
} else if(HAS_ATTR(headers[i], "nameexpr")) {
if (_interpreter->getDataModel()) {
try {
name = _interpreter->getDataModel().evalAsString(ATTR(headers[i], "nameexpr"));
} catch (Event e) {
LOG(ERROR) << "Syntax error with nameexpr in header child of Respond element:" << std::endl << e << std::endl;
return;
}
} else {
LOG(ERROR) << "header element has nameexpr attribute but no datamodel is specified.";
return;
}
} else {
LOG(ERROR) << "header element has no name or nameexpr attribute.";
return;
}
std::string value;
if (HAS_ATTR(headers[i], "value")) {
value = ATTR(headers[i], "value");
} else if(HAS_ATTR(headers[i], "valueexpr")) {
if (_interpreter->getDataModel()) {
try {
value = _interpreter->getDataModel().evalAsString(ATTR(headers[i], "valueexpr"));
} catch (Event e) {
LOG(ERROR) << "Syntax error with valueexpr in header child of Respond element:" << std::endl << e << std::endl;
return;
}
} else {
LOG(ERROR) << "header element has valueexpr attribute but no datamodel is specified.";
return;
}
} else {
LOG(ERROR) << "header element has no value or valueexpr attribute.";
return;
}
httpReply.headers[name] = value;
}
// send the reply
HTTPServer::reply(httpReply);
servlet->getRequests().erase(requestId);
}
void RespondElement::exitElement(const Arabica::DOM::Node<std::string>& node) {
}
}
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