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DownloadRemoteFile.cpp
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DownloadRemoteFile.cpp
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// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2018 ISIS Rutherford Appleton Laboratory UKRI,
// NScD Oak Ridge National Laboratory, European Spallation Source,
// Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#include "MantidRemoteAlgorithms/DownloadRemoteFile.h"
#include "MantidKernel/ConfigService.h"
#include "MantidKernel/FacilityInfo.h"
#include "MantidKernel/ListValidator.h"
#include "MantidKernel/MandatoryValidator.h"
#include "MantidKernel/MaskedProperty.h"
#include "MantidKernel/RemoteJobManager.h"
#include "MantidKernel/SimpleJSON.h"
#include "boost/make_shared.hpp"
#include <fstream>
namespace Mantid {
namespace RemoteAlgorithms {
// Register the algorithm into the AlgorithmFactory
DECLARE_ALGORITHM(DownloadRemoteFile)
using namespace Mantid::Kernel;
using namespace Mantid::API;
// A reference to the logger is provided by the base class, it is called g_log.
DownloadRemoteFile::DownloadRemoteFile() { this->useAlgorithm("DownloadRemoteFile", 2); }
void DownloadRemoteFile::init() {
// Unlike most algorithms, this one doesn't deal with workspaces....
auto requireValue = std::make_shared<MandatoryValidator<std::string>>();
// Compute Resources
std::vector<std::string> computes = Mantid::Kernel::ConfigService::Instance().getFacility().computeResources();
declareProperty("ComputeResource", "", std::make_shared<StringListValidator>(computes),
"The name of the remote computer holding the file", Direction::Input);
// The transaction ID comes from the StartRemoteTransaction algortithm
declareProperty("TransactionID", "", requireValue, "The ID of the transaction that owns the file", Direction::Input);
declareProperty("RemoteFileName", "", requireValue,
"The name of the file on the remote machine. (Filename only; no path)", Direction::Input);
declareProperty("LocalFileName", "", requireValue,
"The full pathname on the local machine where the downloaded "
"file should be saved.",
Direction::Input);
// Note: 'RemoteFileName' is just the name. The remote server figures out the
// full path
// from the transaction ID. 'LocalFileName' *IS* the full pathname (on the
// local machine)
}
void DownloadRemoteFile::exec() {
std::shared_ptr<RemoteJobManager> jobManager =
Mantid::Kernel::ConfigService::Instance().getFacility().getRemoteJobManager(getPropertyValue("ComputeResource"));
// jobManager is a std::shared_ptr...
if (!jobManager) {
// Requested compute resource doesn't exist
// TODO: should we create our own exception class for this??
throw(std::runtime_error(
std::string("Unable to create a compute resource named " + getPropertyValue("ComputeResource"))));
}
std::istream &respStream =
jobManager->httpGet("/download", std::string("TransID=") + getPropertyValue("TransactionID") +
"&File=" + getPropertyValue("RemoteFileName"));
if (jobManager->lastStatus() == Poco::Net::HTTPResponse::HTTP_OK) {
std::string localFileName = getPropertyValue("LocalFileName");
std::ofstream outfile(localFileName.c_str());
if (outfile.good()) {
outfile << respStream.rdbuf();
outfile.close();
g_log.information() << "Downloaded '" << getPropertyValue("RemoteFileName") << "' to '"
<< getPropertyValue("LocalFileName") << "'\n";
} else {
throw(std::runtime_error(std::string("Failed to open " + getPropertyValue("LocalFileName"))));
}
} else {
JSONObject resp;
initFromStream(resp, respStream);
std::string errMsg;
resp["Err_Msg"].getValue(errMsg);
throw(std::runtime_error(errMsg));
}
}
} // end namespace RemoteAlgorithms
} // end namespace Mantid