text: from urllib.request import urlopen
  import glob
  import grp
  import http.client
  import os
  import os.path
  import psutil
  import pwd
  import shutil
  import signal
  import socket
  import stat
  import sys
  import tempfile
  
  from robot.api import logger
  from robot.libraries.BuiltIn import BuiltIn
  import demjson
  
  def Check_JSON(j):
      d = demjson.decode(j, strict=True)
      logger.debug('got json %s' % d)
      assert len(d) > 0
      assert 'error' not in d
      return d
  
  def cleanup_temporary_directory(directory):
      shutil.rmtree(directory)
  
  def save_run_results(directory, filenames):
      current_directory = os.getcwd()
      suite_name = BuiltIn().get_variable_value("${SUITE_NAME}")
      test_name = BuiltIn().get_variable_value("${TEST NAME}")
      onlyfiles = [f for f in os.listdir(directory) if os.path.isfile(os.path.join(directory, f))]
      logger.debug('%s content before cleanup: %s' % (directory, onlyfiles))
      if test_name is None:
          # this is suite-level tear down
          destination_directory = "%s/robot-save/%s" % (current_directory, suite_name)
      else:
          destination_directory = "%s/robot-save/%s/%s" % (current_directory, suite_name, test_name)
      if not os.path.isdir(destination_directory):
          os.makedirs(destination_directory)
      for file in filenames.split(' '):
          source_file = "%s/%s" % (directory, file)
          logger.debug('check if we can save %s' % source_file)
          if os.path.isfile(source_file):
              logger.debug('found %s, save it' % file)
              shutil.copy(source_file, "%s/%s" % (destination_directory, file))
              shutil.copy(source_file, "%s/robot-save/%s.last" % (current_directory, file))
  
  def encode_filename(filename):
      return "".join(['%%%0X' % ord(b) for b in filename])
  
  def get_test_directory():
      return os.path.abspath(os.path.dirname(os.path.realpath(__file__)) + "../../")
  
  def get_top_dir():
      if os.environ.get('RSPAMD_TOPDIR'):
          return os.environ['RSPAMD_TOPDIR']
  
      return get_test_directory() + "/../../"
  
  def get_install_root():
      if os.environ.get('RSPAMD_INSTALLROOT'):
          return os.path.abspath(os.environ['RSPAMD_INSTALLROOT'])
  
      return os.path.abspath("../install/")
  
  def get_rspamd():
      if os.environ.get('RSPAMD'):
          return os.environ['RSPAMD']
      if os.environ.get('RSPAMD_INSTALLROOT'):
          return os.environ['RSPAMD_INSTALLROOT'] + "/bin/rspamd"
      dname = get_top_dir()
      return dname + "/src/rspamd"
  
  def get_rspamc():
      if os.environ.get('RSPAMC'):
          return os.environ['RSPAMC']
      if os.environ.get('RSPAMD_INSTALLROOT'):
          return os.environ['RSPAMD_INSTALLROOT'] + "/bin/rspamc"
      dname = get_top_dir()
      return dname + "/src/client/rspamc"
  
  def get_rspamadm():
      if os.environ.get('RSPAMADM'):
          return os.environ['RSPAMADM']
      if os.environ.get('RSPAMD_INSTALLROOT'):
          return os.environ['RSPAMD_INSTALLROOT'] + "/bin/rspamadm"
      dname = get_top_dir()
      return dname + "/src/rspamadm/rspamadm"
  
  def HTTP(method, host, port, path, data=None, headers={}):
      c = http.client.HTTPConnection("%s:%s" % (host, port))
      c.request(method, path, data, headers)
      r = c.getresponse()
      t = r.read()
      s = r.status
      c.close()
      return [s, t]
  
  def hard_link(src, dst):
      os.link(src, dst)
  
  def make_temporary_directory():
      """Creates and returns a unique temporary directory
  
      Example:
      | ${TMPDIR} = | Make Temporary Directory |
      """
      dirname = tempfile.mkdtemp()
      os.chmod(dirname, stat.S_IRUSR |
               stat.S_IXUSR |
               stat.S_IWUSR |
               stat.S_IRGRP |
               stat.S_IXGRP |
               stat.S_IROTH |
               stat.S_IXOTH)
      return dirname
  
  def make_temporary_file():
      return tempfile.mktemp()
  
  def path_splitter(path):
      dirname = os.path.dirname(path)
      basename = os.path.basename(path)
      return [dirname, basename]
  
  def rspamc(addr, port, filename):
      mboxgoo = b"From MAILER-DAEMON Fri May 13 19:17:40 2016\r\n"
      goo = open(filename, 'rb').read()
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      s.connect((addr, port))
      s.send(b"CHECK RSPAMC/1.0\r\nContent-length: ")
      s.send(str(len(goo+mboxgoo)).encode('utf-8'))
      s.send(b"\r\n\r\n")
      s.send(mboxgoo)
      s.send(goo)
      r = s.recv(2048)
      return r.decode('utf-8')
  
  def Scan_File(filename, **headers):
      addr = BuiltIn().get_variable_value("${LOCAL_ADDR}")
      port = BuiltIn().get_variable_value("${PORT_NORMAL}")
      headers["Queue-Id"] = BuiltIn().get_variable_value("${TEST_NAME}")
      c = http.client.HTTPConnection("%s:%s" % (addr, port))
      c.request("POST", "/checkv2", open(filename, "rb"), headers)
      r = c.getresponse()
      assert r.status == 200
      d = demjson.decode(r.read())
      c.close()
      BuiltIn().set_test_variable("${SCAN_RESULT}", d)
      return
  
  def Send_SIGUSR1(pid):
      pid = int(pid)
      os.kill(pid, signal.SIGUSR1)
  
  def set_directory_ownership(path, username, groupname):
      if os.getuid() == 0:
          uid=pwd.getpwnam(username).pw_uid
          gid=grp.getgrnam(groupname).gr_gid
          os.chown(path, uid, gid)
  
  def spamc(addr, port, filename):
      goo = open(filename, 'rb').read()
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      s.connect((addr, port))
      s.send(b"SYMBOLS SPAMC/1.0\r\nContent-length: ")
      s.send(str(len(goo)).encode('utf-8'))
      s.send(b"\r\n\r\n")
      s.send(goo)
      s.shutdown(socket.SHUT_WR)
      r = s.recv(2048)
      return r.decode('utf-8')
  
  def TCP_Connect(addr, port):
      """Attempts to open a TCP connection to specified address:port
  
      Example:
      | Wait Until Keyword Succeeds | 5s | 10ms | TCP Connect | localhost | 8080 |
      """
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      s.settimeout(5) # seconds
      s.connect((addr, port))
      s.close()
  
  def ping_rspamd(addr, port):
      return str(urlopen("http://%s:%s/ping" % (addr, port)).read())
  
  def redis_check(addr, port):
      """Attempts to open a TCP connection to specified address:port
  
      Example:
      | Wait Until Keyword Succeeds | 5s | 10ms | TCP Connect | localhost | 8080 |
      """
      s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
      s.settimeout(1.0) # seconds
      s.connect((addr, port))
      if s.sendall(b"ECHO TEST\n"):
          result = s.recv(128)
          return result == b'TEST\n'
      else:
          return False
  
  def update_dictionary(a, b):
      a.update(b)
      return a
  
  
  TERM_TIMEOUT = 10  # wait after sending a SIGTERM signal
  KILL_WAIT = 20  # additional wait after sending a SIGKILL signal
  
  def shutdown_process(process):
      # send SIGTERM
      process.terminate()
  
      try:
          process.wait(TERM_TIMEOUT)
          return
      except psutil.TimeoutExpired:
          logger.info( "PID {} is not terminated in {} seconds, sending SIGKILL...".format(process.pid, TERM_TIMEOUT))
          try:
              # send SIGKILL
              process.kill()
          except psutil.NoSuchProcess:
              # process exited just before we tried to kill
              return
  
      try:
          process.wait(KILL_WAIT)
      except psutil.TimeoutExpired:
          raise RuntimeError("Failed to shutdown process {} ({})".format(process.pid, process.name()))
  
  
  def shutdown_process_with_children(pid):
      pid = int(pid)
      try:
          process = psutil.Process(pid=pid)
      except psutil.NoSuchProcess:
          return
      children = process.children(recursive=False)
      shutdown_process(process)
      for child in children:
          try:
              shutdown_process(child)
          except:
              pass
  
  def write_to_stdin(process_handle, text):
      if not isinstance(text, bytes):
          text = bytes(text, 'utf-8')
      lib = BuiltIn().get_library_instance('Process')
      obj = lib.get_process_object()
      obj.stdin.write(text + b"\n")
      obj.stdin.flush()
      obj.stdin.close()
      out = obj.stdout.read(4096)
      return out.decode('utf-8')
  
  def get_file_if_exists(file_path):
      if os.path.exists(file_path):
          with open(file_path, 'r') as myfile:
              return myfile.read()
      return None
  
  def _merge_luacov_stats(statsfile, coverage):
      """
      Reads a coverage stats file written by luacov and merges coverage data to
      'coverage' dict: { src_file: hits_list }
  
      Format of the file defined in:
      https://github.com/keplerproject/luacov/blob/master/src/luacov/stats.lua
      """
      with open(statsfile, 'r') as fh:
          while True:
              # max_line:filename
              line = fh.readline().rstrip()
              if not line:
                  break
  
              max_line, src_file = line.split(':')
              counts = [int(x) for x in fh.readline().split()]
              assert len(counts) == int(max_line)
  
              if src_file in coverage:
                  # enlarge list if needed: lenght of list in different luacov.stats.out files may differ
                  old_len = len(coverage[src_file])
                  new_len = len(counts)
                  if new_len > old_len:
                      coverage[src_file].extend([0] * (new_len - old_len))
                  # sum execution counts for each line
                  for l, exe_cnt in enumerate(counts):
                      coverage[src_file][l] += exe_cnt
              else:
                  coverage[src_file] = counts
  
  
  def _dump_luacov_stats(statsfile, coverage):
      """
      Saves data to the luacov stats file. Existing file is overwritted if exists.
      """
      src_files = sorted(coverage)
  
      with open(statsfile, 'w') as fh:
          for src in src_files:
              stats = " ".join(str(n) for n in coverage[src])
              fh.write("%s:%s\n%s\n" % (len(coverage[src]), src, stats))
  
  
  # File used by luacov to collect coverage stats
  LUA_STATSFILE = "luacov.stats.out"
  
  
  def collect_lua_coverage():
      """
      Merges ${TMPDIR}/*.luacov.stats.out into luacov.stats.out
  
      Example:
      | Collect Lua Coverage |
      """
      # decided not to do optional coverage so far
      #if not 'ENABLE_LUA_COVERAGE' in os.environ['HOME']:
      #    logger.info("ENABLE_LUA_COVERAGE is not present in env, will not collect Lua coverage")
      #    return
  
      tmp_dir = BuiltIn().get_variable_value("${TMPDIR}")
  
      coverage = {}
      input_files = []
  
      for f in glob.iglob("%s/*.luacov.stats.out" % tmp_dir):
          _merge_luacov_stats(f, coverage)
          input_files.append(f)
  
      if input_files:
          if os.path.isfile(LUA_STATSFILE):
              _merge_luacov_stats(LUA_STATSFILE, coverage)
          _dump_luacov_stats(LUA_STATSFILE, coverage)
          logger.info("%s merged into %s" % (", ".join(input_files), LUA_STATSFILE))
      else:
          logger.info("no *.luacov.stats.out files found in %s" % tmp_dir)
  