CatalogAlgorithmHelper.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 "MantidICat/CatalogAlgorithmHelper.h"
 
#include <json/reader.h>
#include <json/value.h>
#include <set>
 
using Poco::Net::HTTPResponse;
 
namespace Mantid::ICat {
 
const std::string CatalogAlgorithmHelper::getIDSError(const HTTPResponse::HTTPStatus &HTTPStatus,
                                                      std::istream &responseStream) {
  std::set<HTTPResponse::HTTPStatus> successHTTPStatus = {HTTPResponse::HTTP_OK, HTTPResponse::HTTP_CREATED,
                                                          HTTPResponse::HTTP_ACCEPTED};
 
  // HTTP Status is not one of the positive statuses
  if (successHTTPStatus.find(HTTPStatus) == successHTTPStatus.end()) {
    // Attempt to parse response as json stream
    Json::Value json;
    ::Json::CharReaderBuilder readerBuilder;
    std::string errors;
 
    // Error messages from IDS are returned as json
    if (Json::parseFromStream(readerBuilder, responseStream, &json, &errors)) {
      return json.get("code", "UNKNOWN").asString() + ": " + json.get("message", "Unknown Error").asString();
    } else {
      // Sometimes the HTTP server can throw an error (which is plain HTML)
      return "HTTP Error: " + std::to_string(HTTPStatus);
    }
  }
 
  // No error occurred, so return an empty string for verification.
  return "";
}
 
} // namespace Mantid::ICat