Method RunHttpRequest

libs/platform/http_client_curl.cpp:184–309

Extract HTTP headers via temporary file with -D switch. HTTP status code is extracted from curl output (-w switches). Redirects are handled recursively. TODO(AlexZ): avoid infinite redirects loop.

// HTTP status code is extracted from curl output (-w switches).
// Redirects are handled recursively. TODO(AlexZ): avoid infinite redirects loop.
bool HttpClient::RunHttpRequest()
{
  ScopedRemoveFile headers_deleter(GetTmpFileName());
  ScopedRemoveFile body_deleter;
  ScopedRemoveFile received_file_deleter;

  std::string cmd = "curl -s -w \"%{http_code}\" -D \"" + headers_deleter.m_fileName + "\" ";
  // From curl manual:
  // This  option [-X] only changes the actual word used in the HTTP request, it does not alter
  // the way curl behaves. So for example if you want to make a proper
  // HEAD request, using -X HEAD will not suffice. You need to use the -I, --head option.
  if (m_httpMethod == "HEAD")
    cmd += "-I ";
  else
    cmd += "-X " + m_httpMethod + " ";

  for (auto const & header : m_headers)
    cmd += "-H \"" + header.first + ": " + header.second + "\" ";

  if (!m_cookies.empty())
    cmd += "-b \"" + m_cookies + "\" ";

  cmd += "-m \"" + strings::to_string(m_timeoutSec) + "\" ";

  if (!m_bodyData.empty())
  {
    body_deleter.m_fileName = GetTmpFileName();
    // POST body through tmp file to avoid breaking command line.
    if (!WriteToFile(body_deleter.m_fileName, m_bodyData))
      return false;

    // TODO(AlexZ): Correctly clean up this internal var to avoid client confusion.
    m_inputFile = body_deleter.m_fileName;
  }
  // Content-Length is added automatically by curl.
  if (!m_inputFile.empty())
    cmd += "--data-binary \"@" + m_inputFile + "\" ";

  // Use temporary file to receive data from server.
  // If user has specified file name to save data, it is not temporary and is not deleted automatically.
  std::string rfile = m_outputFile;
  if (rfile.empty())
  {
    rfile = GetTmpFileName();
    received_file_deleter.m_fileName = rfile;
  }

  cmd += "-o " + rfile + strings::to_string(" ") + "\"" + m_urlRequested + "\"";

  LOG(LDEBUG, ("Executing", cmd));

  try
  {
    m_errorCode = stoi(RunCurl(cmd));
  }
  catch (RootException const & ex)
  {
    LOG(LERROR, (ex.Msg()));