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/**
* @file
* @author 2017 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/util/DOM.h"
#include "uscxml/server/HTTPServer.h"
#include "uscxml/interpreter/LoggingImpl.h"
#include "uscxml/plugins/ioprocessor/http/HTTPIOProcessor.h"
#ifdef BUILD_AS_PLUGINS
#include <Pluma/Connector.hpp>
#endif
namespace uscxml {
using namespace XERCESC_NS;
void RespondElement::enterElement(XERCESC_NS::DOMElement* node) {
// try to get the request id
if (!HAS_ATTR(node, X("to"))) {
ERROR_EXECUTION_THROW2("Respond element requires 'to' attribute", node);
}
if (HAS_ATTR(node, X("to")) && !_interpreter->getActionLanguage()->dataModel) {
ERROR_EXECUTION_THROW2("Respond element with 'to' requires datamodel", node);
}
std::string requestId = _interpreter->getActionLanguage()->dataModel.evalAsData(ATTR(node, X("to"))).atom;
auto ioProcs = _interpreter->getIOProcessors();
if (ioProcs.find("http") == ioProcs.end()) {
ERROR_EXECUTION_THROW2("No HTTP ioprocessor associated with interpreter", node);
}
// try to get the request object
IOProcessor ioProc = ioProcs["http"];
HTTPIOProcessor* http = (HTTPIOProcessor*)(ioProc.getImpl().operator->());
if (http->getUnansweredRequests().find(requestId) == http->getUnansweredRequests().end()) {
ERROR_EXECUTION_THROW2("No unanswered HTTP request with given id", node);
}
HTTPServer::Request httpReq = http->getUnansweredRequests()[requestId].second;
assert(httpReq.evhttpReq != NULL);
HTTPServer::Reply httpReply(httpReq);
// get the status or default to 200
std::string statusStr = (HAS_ATTR(node, X("status")) ? ATTR(node, X("status")) : "200");
if (!isNumeric(statusStr.c_str(), 10)) {
ERROR_EXECUTION_THROW2("Respond element with non-numeric status: " + statusStr, node);
}
httpReply.status = strTo<int>(statusStr);;
// extract the content
std::list<DOMElement*> contents = DOMUtils::filterChildElements(XML_PREFIX(node).str() + "content", node);
if (contents.size() > 0) {
DOMElement* contentElem = contents.front();
if (HAS_ATTR(contentElem, kXMLCharExpr)) {
// -- content is evaluated string from datamodel
if (_interpreter->getActionLanguage()->dataModel) {
try {
Data contentData = _interpreter->getActionLanguage()->dataModel.evalAsData(ATTR(contentElem, kXMLCharExpr));
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) {
ERROR_EXECUTION_RETHROW(e, "Syntax error with expr in content child of respond element", node);
}
} else {
ERROR_EXECUTION_THROW2("content element has expr attribute but no datamodel is specified", node);
}
} else if (HAS_ATTR(contentElem, X("file")) || HAS_ATTR(contents.front(), X("fileexpr"))) {
// -- content is from file
URL file;
if (HAS_ATTR(contentElem, X("fileexpr"))) {
if (_interpreter->getActionLanguage()->dataModel) {
try {
file = _interpreter->getActionLanguage()->dataModel.evalAsData(ATTR(contentElem, X("fileexpr"))).atom;
} catch (Event e) {
ERROR_EXECUTION_RETHROW(e, "Syntax error with fileexpr in content child of respond element", node);
}
}
} else {
file = ATTR(contentElem, X("file"));
}
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 (contentElem->hasChildNodes()) { // -- content embedded as child nodes ------
httpReply.content = X(contentElem->getFirstChild()->getNodeValue()).str();
} else {
ERROR_EXECUTION_THROW2("content element does not specify any content", node);
}
}
// process headers
std::list<DOMElement*> headers = DOMUtils::filterChildElements(XML_PREFIX(node).str() + "header", node);
for (auto headerElem : headers) {
std::string name;
if (HAS_ATTR(headerElem, kXMLCharName)) {
name = ATTR(headerElem, kXMLCharName);
} else if(HAS_ATTR(headerElem, X("nameexpr"))) {
if (_interpreter->getActionLanguage()->dataModel) {
try {
name = _interpreter->getActionLanguage()->dataModel.evalAsData(ATTR(headerElem, X("nameexpr"))).atom;
} catch (Event e) {
ERROR_EXECUTION_RETHROW(e, "Syntax error with nameexpr in header child of Respond element", headerElem);
}
} else {
ERROR_EXECUTION_THROW2("header element has nameexpr attribute but no datamodel is specified", headerElem);
}
} else {
ERROR_EXECUTION_THROW2("header element has no name or nameexpr attribute", headerElem);
}
std::string value;
if (HAS_ATTR(headerElem, X("value"))) {
value = ATTR(headerElem, X("value"));
} else if(HAS_ATTR(headerElem, X("valueexpr"))) {
if (_interpreter->getActionLanguage()->dataModel) {
try {
value = _interpreter->getActionLanguage()->dataModel.evalAsData(ATTR(headerElem, X("valueexpr"))).atom;
} catch (Event e) {
ERROR_EXECUTION_RETHROW(e, "Syntax error with valueexpr in header child of Respond element", headerElem);
}
} else {
ERROR_EXECUTION_THROW2("header element has valueexpr attribute but no datamodel is specified", headerElem);
}
} else {
ERROR_EXECUTION_THROW2("header element has no value or valueexpr attribute", headerElem);
return;
}
httpReply.headers[name] = value;
}
// send the reply
HTTPServer::reply(httpReply);
http->getUnansweredRequests().erase(requestId);
}
}
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