code: def validateStringInput(input_key,input_data, read=False):
      
      log = clog.error_log
      func = None
      if '*' in input_data or '%' in input_data:
          func = validationFunctionWildcard.get(input_key)
          if func is None:
              func = searchstr
      elif input_key == 'migration_input' :
          if input_data.find('#') != -1 : func = block
          else : func = dataset
      else:
          if not read:
              func = validationFunction.get(input_key)
              if func is None:
                  func = namestr
          else:
              if input_key == 'dataset':
                  func = reading_dataset_check
              elif input_key == 'block_name':
                  func = reading_block_check
              elif input_key == 'logical_file_name':
                  func = reading_lfn_check
              else:
                  func = namestr
      try:
          func(input_data)
      except AssertionError as ae:
          serverLog = str(ae) + " key-value pair (%s, %s) cannot pass input checking" %(input_key, input_data)
          #print serverLog
          dbsExceptionHandler("dbsException-invalid-input2", message="Invalid Input Data %s...:  Not Match Required Format" %input_data[:10], \
              logger=log.error, serverError=serverLog)
      return input_data
docs: To check if a string has the required format. This is only used for POST APIs.