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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 "FileElement.h"
#include <glog/logging.h>
#include <stdio.h>
#include <vector>
#include <boost/algorithm/string.hpp>
#include "uscxml/messages/Blob.h"
#include "uscxml/DOMUtils.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 FileElementProvider() );
return true;
}
#endif
boost::shared_ptr<ExecutableContentImpl> FileElement::create(InterpreterImpl* interpreter) {
boost::shared_ptr<FileElement> element = boost::shared_ptr<FileElement>(new FileElement());
return element;
}
FileElement::~FileElement() {
}
void FileElement::enterElement(const Arabica::DOM::Element<std::string>& node) {
if (!HAS_ATTR(node, "url") && !HAS_ATTR(node, "urlexpr")) {
LOG(ERROR) << "File element requires url or urlexpr";
return;
}
_givenUrl = (HAS_ATTR(node, "url") ? ATTR(node, "url") : _interpreter->getDataModel().evalAsString(ATTR(node, "urlexpr")));
std::string sandBoxStr = (HAS_ATTR(node, "sandbox") ? ATTR(node, "sandbox") : "on");
if (iequals(sandBoxStr, "off") || iequals(sandBoxStr, "false") || iequals(sandBoxStr, "no")) {
_sandBoxed = false;
}
if (HAS_ATTR(node, "operation")) {
std::string operation = ATTR(node, "operation");
if (iequals(operation, "read") || iequals(operation, "load")) {
_operation = READ;
} else if(iequals(operation, "write")) {
_operation = WRITE;
} else if(iequals(operation, "append")) {
_operation = APPEND;
} else {
LOG(ERROR) << "File element operation attribute not one of read, write or append.";
return;
}
} else {
_operation = READ;
}
// callback is only needed for reading
std::string callback;
if (_operation == READ) {
if (!HAS_ATTR(node, "callback") && !HAS_ATTR(node, "callbackexpr")) {
LOG(ERROR) << "File element requires callback or callbackexpr";
return;
}
callback = (HAS_ATTR(node, "callback") ? ATTR(node, "callback") : _interpreter->getDataModel().evalAsString(ATTR(node, "callbackexpr")));
}
std::string contentStr;
char* content = NULL;
size_t contentSize = 0;
if (_operation == WRITE || _operation == APPEND) {
if (!HAS_ATTR(node, "content") && !HAS_ATTR(node, "contentexpr")) {
LOG(ERROR) << "File element requires content or contentexpr";
return;
}
if (HAS_ATTR(node, "content")) {
contentStr = ATTR(node, "content");
} else {
Data data = _interpreter->getDataModel().getStringAsData(ATTR(node, "contentexpr"));
if (data.binary) {
content = data.binary.getData();
contentSize = data.binary.getSize();
} else if (data.atom.length() > 0) {
contentStr = data.atom;
}
}
}
std::string type = "text";
if (HAS_ATTR(node, "type")) {
type = ATTR(node, "type");
} else if(HAS_ATTR(node, "typeexpr")) {
type = _interpreter->getDataModel().evalAsString(ATTR(node, "typeexpr"));
}
if (iequals(type, "text")) {
_type = TEXT;
} else if (iequals(type, "json")) {
_type = JSON;
} else if (iequals(type, "binary")) {
_type = BINARY;
} else if(iequals(type, "xml")) {
_type = XML;
} else {
LOG(ERROR) << "File element type attribute not one of text, json, xml or binary.";
return;
}
_actualUrl = URL(_givenUrl);
if (_sandBoxed && _actualUrl.isAbsolute()) {
LOG(ERROR) << "Given URL is absolute with sandboxing enabled.";
return;
}
if (_sandBoxed)
_actualUrl.toAbsolute(URL::getResourceDir());
_filepath = _actualUrl.path();
std::string writeMode;
switch (_operation) {
case APPEND:
writeMode = "a+";
case WRITE: {
if (writeMode.length() == 0)
writeMode = "w+";
FILE *fp;
fp = fopen(_filepath.c_str(), writeMode.c_str());
if (fp == NULL) {
LOG(ERROR) << "Error opening '" << _filepath << "' for writing: " << strerror(errno);
}
if (content && contentSize > 0) {
size_t written = fwrite(content, 1, contentSize, fp);
if (written != contentSize) {
LOG(ERROR) << "Error writing to '" << _filepath << "': " << strerror(errno);
return;
}
} else if (contentStr.length() > 0) {
size_t written = fwrite(contentStr.c_str(), contentStr.length(), 1, fp);
if (written < 1) {
LOG(ERROR) << "Error writing to '" << _filepath << "': " << strerror(errno);
}
} else {
LOG(WARNING) << "Nothing to write to '" << _filepath;
}
fclose(fp);
break;
}
case READ: {
struct stat fileStat;
int err = stat(_filepath.c_str(), &fileStat);
if (err < 0) {
LOG(ERROR) << "Cannot stat file '" << _filepath << "': " << strerror(errno);
return;
}
Event event;
event.name = callback;
std::string filename = _actualUrl.pathComponents()[_actualUrl.pathComponents().size() - 1];
event.data.compound["file"].compound["name"] = Data(filename, Data::VERBATIM);
event.data.compound["file"].compound["path"] = Data(_filepath, Data::VERBATIM);
event.data.compound["file"].compound["mtime"] = Data(toStr(fileStat.st_mtime), Data::INTERPRETED);
event.data.compound["file"].compound["ctime"] = Data(toStr(fileStat.st_ctime), Data::INTERPRETED);
event.data.compound["file"].compound["atime"] = Data(toStr(fileStat.st_atime), Data::INTERPRETED);
event.data.compound["file"].compound["size"] = Data(toStr(fileStat.st_size), Data::INTERPRETED);
FILE *fp;
fp = fopen(_filepath.c_str(), "r");
fseek (fp, 0, SEEK_END);
size_t filesize = ftell(fp);
rewind (fp);
char* fileContents = (char*)malloc(filesize);
size_t read = fread(fileContents, 1, filesize, fp);
fclose(fp);
if (read != filesize) {
LOG(ERROR) << "Error reading from '" << _filepath << "': " << strerror(errno);
return;
}
switch (_type) {
case BINARY: {
std::string mimetype = "application/octet-stream";
if (HAS_ATTR(node, "mimetype")) {
mimetype = ATTR(node, "mimetype");
} else if(HAS_ATTR(node, "mimetypeexpr")) {
mimetype = _interpreter->getDataModel().evalAsString(ATTR(node, "mimetypeexpr"));
}
event.data.compound["content"] = Data(fileContents, fileStat.st_size, mimetype, true);
break;
}
case TEXT:
event.data.compound["content"] = Data(fileContents, Data::VERBATIM);
free(fileContents);
break;
case JSON: {
Data json = Data::fromJSON(fileContents);
free(fileContents);
if (json.empty()) {
LOG(ERROR) << "Cannot parse contents of " << _filepath << " as JSON";
return;
}
event.data.compound["content"] = json;
break;
}
case XML: {
NameSpacingParser parser = NameSpacingParser::fromXML(fileContents);
if (parser.errorsReported()) {
LOG(ERROR) << "Cannot parse contents of " << _filepath << " as XML";
return;
}
event.dom = parser.getDocument().getDocumentElement();
break;
}
}
_interpreter->receive(event);
break;
}
}
}
void FileElement::exitElement(const Arabica::DOM::Element<std::string>& node) {
}
}
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