def make_get_exception_details_message(self, seq, thread_id, topmost_frame):
        """Returns exception details as XML """
        try:
            # If the debugger is not suspended, just return the thread and its id.
            cmd_text = ['<xml><thread id="%s" ' % (thread_id,)]

            if topmost_frame is not None:
                try:
                    frame = topmost_frame
                    topmost_frame = None
                    while frame is not None:
                        if frame.f_code.co_name == 'do_wait_suspend' and frame.f_code.co_filename.endswith('pydevd.py'):
                            arg = frame.f_locals.get('arg', None)
                            if arg is not None:
                                exc_type, exc_desc, _thread_suspend_str, thread_stack_str = self._make_send_curr_exception_trace_str(
                                    thread_id, *arg)
                                cmd_text.append('exc_type="%s" ' % (exc_type,))
                                cmd_text.append('exc_desc="%s" ' % (exc_desc,))
                                cmd_text.append('>')
                                cmd_text.append(thread_stack_str)
                                break
                        frame = frame.f_back
                    else:
                        cmd_text.append('>')
                finally:
                    frame = None
            cmd_text.append('</thread></xml>')
            return NetCommand(CMD_GET_EXCEPTION_DETAILS, seq, ''.join(cmd_text))
        except:
            return self.make_error_message(seq, get_exception_traceback_str())

    def do_it(self, dbg):
        ''' Create an XML for console output, error and more (true/false)
        <xml>
            <output message=output_message></output>
            <error message=error_message></error>
            <more>true/false</more>
        </xml>
        '''
        try:
            frame = dbg.find_frame(self.thread_id, self.frame_id)
            if frame is not None:
                console_message = pydevd_console.execute_console_command(
                    frame, self.thread_id, self.frame_id, self.line, self.buffer_output)

                cmd = dbg.cmd_factory.make_send_console_message(self.sequence, console_message.to_xml())
            else:
                from _pydevd_bundle.pydevd_console import ConsoleMessage
                console_message = ConsoleMessage()
                console_message.add_console_message(
                    pydevd_console.CONSOLE_ERROR,
                    "Select the valid frame in the debug view (thread: %s, frame: %s invalid)" % (self.thread_id, self.frame_id),
                )
                cmd = dbg.cmd_factory.make_error_message(self.sequence, console_message.to_xml())
        except:
            exc = get_exception_traceback_str()
            cmd = dbg.cmd_factory.make_error_message(self.sequence, "Error evaluating expression " + exc)
        dbg.writer.add_command(cmd)

    def make_get_thread_stack_message(self, py_db, seq, thread_id, topmost_frame, must_be_suspended=False):
        """
        Returns thread stack as XML.

        :param be_suspended: If True and the thread is not suspended, returns None.
        """
        try:
            # If frame is None, the return is an empty frame list.
            cmd_text = ['<xml><thread id="%s">' % (thread_id,)]

            if topmost_frame is not None:
                frame_id_to_lineno = {}
                try:
                    # : :type suspended_frames_manager: SuspendedFramesManager
                    suspended_frames_manager = py_db.suspended_frames_manager
                    info = suspended_frames_manager.get_topmost_frame_and_frame_id_to_line(thread_id)
                    if info is None:
                        # Could not find stack of suspended frame...
                        if must_be_suspended:
                            return None
                    else:
                        # Note: we have to use the topmost frame where it was suspended (it may
                        # be different if it was an exception).
                        topmost_frame, frame_id_to_lineno = info

                    cmd_text.append(self.make_thread_stack_str(topmost_frame, frame_id_to_lineno))
                finally:
                    topmost_frame = None
            cmd_text.append('</thread></xml>')
            return NetCommand(CMD_GET_THREAD_STACK, seq, ''.join(cmd_text))
        except:
            return self.make_error_message(seq, get_exception_traceback_str())

 def make_send_curr_exception_trace_message(self, seq, thread_id, curr_frame_id, exc_type, exc_desc, trace_obj):
     try:
         exc_type, exc_desc, thread_suspend_str, _thread_stack_str = self._make_send_curr_exception_trace_str(
             thread_id, exc_type, exc_desc, trace_obj)
         payload = str(curr_frame_id) + '\t' + exc_type + "\t" + exc_desc + "\t" + thread_suspend_str
         return NetCommand(CMD_SEND_CURR_EXCEPTION_TRACE, seq, payload)
     except Exception:
         return self.make_error_message(seq, get_exception_traceback_str())

    def make_exit_message(self):
        try:
            net = NetCommand(CMD_EXIT, 0, '')

        except:
            net = self.make_error_message(0, get_exception_traceback_str())

        return net

 def make_thread_suspend_message(self, thread_id, frame, stop_reason, message, suspend_type, frame_id_to_lineno=None):
     try:
         thread_suspend_str, thread_stack_str = self.make_thread_suspend_str(
             thread_id, frame, stop_reason, message, suspend_type, frame_id_to_lineno=frame_id_to_lineno)
         cmd = NetCommand(CMD_THREAD_SUSPEND, 0, thread_suspend_str)
         cmd.thread_stack_str = thread_stack_str
         cmd.thread_suspend_str = thread_suspend_str
         return cmd
     except:
         return self.make_error_message(0, get_exception_traceback_str())

 def make_list_threads_message(self, seq):
     """ returns thread listing as XML """
     try:
         threads = get_non_pydevd_threads()
         cmd_text = ["<xml>"]
         append = cmd_text.append
         for thread in threads:
             if is_thread_alive(thread):
                 append(self._thread_to_xml(thread))
         append("</xml>")
         return NetCommand(CMD_RETURN, seq, ''.join(cmd_text))
     except:
         return self.make_error_message(seq, get_exception_traceback_str())

def internal_get_description(dbg, seq, thread_id, frame_id, expression):
    ''' Fetch the variable description stub from the debug console
    '''
    try:
        frame = dbg.find_frame(thread_id, frame_id)
        description = pydevd_console.get_description(frame, thread_id, frame_id, expression)
        description = pydevd_xml.make_valid_xml_value(quote(description, '/>_= \t'))
        description_xml = '<xml><var name="" type="" value="%s"/></xml>' % description
        cmd = dbg.cmd_factory.make_get_description_message(seq, description_xml)
        dbg.writer.add_command(cmd)
    except:
        exc = get_exception_traceback_str()
        cmd = dbg.cmd_factory.make_error_message(seq, "Error in fetching description" + exc)
        dbg.writer.add_command(cmd)

    def make_io_message(self, v, ctx):
        '''
        @param v: the message to pass to the debug server
        @param ctx: 1 for stdio 2 for stderr
        '''

        try:
            if len(v) > MAX_IO_MSG_SIZE:
                v = v[0:MAX_IO_MSG_SIZE]
                v += '...'

            v = pydevd_xml.make_valid_xml_value(quote(v, '/>_= '))
            return NetCommand(str(CMD_WRITE_TO_CONSOLE), 0, '<xml><io s="%s" ctx="%s"/></xml>' % (v, ctx))
        except:
            return self.make_error_message(0, get_exception_traceback_str())

def internal_evaluate_expression(dbg, seq, thread_id, frame_id, expression, is_exec, trim_if_too_big, attr_to_set_result):
    ''' gets the value of a variable '''
    try:
        result = pydevd_vars.evaluate_expression(dbg, thread_id, frame_id, expression, is_exec)
        if attr_to_set_result != "":
            pydevd_vars.change_attr_expression(thread_id, frame_id, attr_to_set_result, expression, dbg, result)
        xml = "<xml>"
        xml += pydevd_xml.var_to_xml(result, expression, trim_if_too_big)
        xml += "</xml>"
        cmd = dbg.cmd_factory.make_evaluate_expression_message(seq, xml)
        dbg.writer.add_command(cmd)
    except:
        exc = get_exception_traceback_str()
        cmd = dbg.cmd_factory.make_error_message(seq, "Error evaluating expression " + exc)
        dbg.writer.add_command(cmd)

    def request_load_source(self, py_db, seq, filename):
        '''
        :param str filename:
            Note: must be already translated for the server.
        '''
        try:
            assert filename.__class__ == str  # i.e.: bytes on py2 and str on py3

            with open(filename, 'r') as stream:
                source = stream.read()
            cmd = py_db.cmd_factory.make_load_source_message(seq, source)
        except:
            cmd = py_db.cmd_factory.make_error_message(seq, get_exception_traceback_str())

        py_db.writer.add_command(cmd)

def internal_get_completions(dbg, seq, thread_id, frame_id, act_tok, line=-1, column=-1):
    '''
    Note that if the column is >= 0, the act_tok is considered text and the actual
    activation token/qualifier is computed in this command.
    '''
    try:
        remove_path = None
        try:
            qualifier = u''
            if column >= 0:
                token_and_qualifier = extract_token_and_qualifier(act_tok, line, column)
                act_tok = token_and_qualifier[0]
                if act_tok:
                    act_tok += u'.'
                qualifier = token_and_qualifier[1]

            frame = dbg.find_frame(thread_id, frame_id)
            if frame is not None:
                if IS_PY2:
                    if not isinstance(act_tok, bytes):
                        act_tok = act_tok.encode('utf-8')
                    if not isinstance(qualifier, bytes):
                        qualifier = qualifier.encode('utf-8')

                completions = _pydev_completer.generate_completions(frame, act_tok)

                # Note that qualifier and start are only actually valid for the
                # Debug Adapter Protocol (for the line-based protocol, the IDE
                # is required to filter the completions returned).
                cmd = dbg.cmd_factory.make_get_completions_message(
                    seq, completions, qualifier, start=column - len(qualifier))
                dbg.writer.add_command(cmd)
            else:
                cmd = dbg.cmd_factory.make_error_message(seq, "internal_get_completions: Frame not found: %s from thread: %s" % (frame_id, thread_id))
                dbg.writer.add_command(cmd)

        finally:
            if remove_path is not None:
                sys.path.remove(remove_path)

    except:
        exc = get_exception_traceback_str()
        sys.stderr.write('%s\n' % (exc,))
        cmd = dbg.cmd_factory.make_error_message(seq, "Error evaluating expression " + exc)
        dbg.writer.add_command(cmd)

    def push(self, line, frame, buffer_output=True):
        """Change built-in stdout and stderr methods by the
        new custom StdMessage.
        execute the InteractiveConsole.push.
        Change the stdout and stderr back be the original built-ins

        :param buffer_output: if False won't redirect the output.

        Return boolean (True if more input is required else False),
        output_messages and input_messages
        """
        self.__buffer_output = buffer_output
        more = False
        if buffer_output:
            original_stdout = sys.stdout
            original_stderr = sys.stderr
        try:
            try:
                self.frame = frame
                if buffer_output:
                    out = sys.stdout = IOBuf()
                    err = sys.stderr = IOBuf()
                more = self.add_exec(line)
            except Exception:
                exc = get_exception_traceback_str()
                if buffer_output:
                    err.buflist.append("Internal Error: %s" % (exc,))
                else:
                    sys.stderr.write("Internal Error: %s\n" % (exc,))
        finally:
            #Remove frame references.
            self.frame = None
            frame = None
            if buffer_output:
                sys.stdout = original_stdout
                sys.stderr = original_stderr

        if buffer_output:
            return more, out.buflist, err.buflist
        else:
            return more, [], []

#.........这里部分代码省略.........

                        cp = py_db.break_on_caught_exceptions.copy()
                        cp.pop(exception, None)
                        py_db.break_on_caught_exceptions = cp
                    except:
                        pydev_log.debug("Error while removing exception %s"%sys.exc_info()[0])
                else:
                    supported_type = False

                    # I.e.: no need to initialize lazy (if we didn't have it in the first place, we can't remove
                    # anything from it anyways).
                    plugin = py_db.plugin
                    if plugin is not None:
                        supported_type = plugin.remove_exception_breakpoint(py_db, exception_type, exception)

                    if supported_type:
                        py_db.has_plugin_exception_breaks = py_db.plugin.has_exception_breaks()
                    else:
                        raise NameError(exception_type)

                py_db.on_breakpoints_changed(remove=True)

            elif cmd_id == CMD_LOAD_SOURCE:
                path = text
                try:
                    if not IS_PY3K:  # In Python 3, the frame object will have unicode for the file, whereas on python 2 it has a byte-array encoded with the filesystem encoding.
                        path = path.encode(file_system_encoding)

                    path = pydevd_file_utils.norm_file_to_server(path)
                    f = open(path, 'r')
                    source = f.read()
                    cmd = py_db.cmd_factory.make_load_source_message(seq, source)
                except:
                    cmd = py_db.cmd_factory.make_error_message(seq, pydevd_tracing.get_exception_traceback_str())

            elif cmd_id == CMD_ADD_DJANGO_EXCEPTION_BREAK:
                exception = text
                plugin = py_db.get_plugin_lazy_init()
                if plugin is not None:
                    plugin.add_breakpoint('add_exception_breakpoint', py_db, 'django', exception)
                    py_db.has_plugin_exception_breaks = py_db.plugin.has_exception_breaks()
                    py_db.on_breakpoints_changed()

            elif cmd_id == CMD_REMOVE_DJANGO_EXCEPTION_BREAK:
                exception = text

                # I.e.: no need to initialize lazy (if we didn't have it in the first place, we can't remove
                # anything from it anyways).
                plugin = py_db.plugin
                if plugin is not None:
                    plugin.remove_exception_breakpoint(py_db, 'django', exception)
                    py_db.has_plugin_exception_breaks = py_db.plugin.has_exception_breaks()
                py_db.on_breakpoints_changed(removed=True)

            elif cmd_id == CMD_EVALUATE_CONSOLE_EXPRESSION:
                # Command which takes care for the debug console communication
                if text != "":
                    thread_id, frame_id, console_command = text.split('\t', 2)
                    console_command, line = console_command.split('\t')

                    if console_command == 'EVALUATE':
                        int_cmd = InternalEvaluateConsoleExpression(
                            seq, thread_id, frame_id, line, buffer_output=True)

                    elif console_command == 'EVALUATE_UNBUFFERED':
                        int_cmd = InternalEvaluateConsoleExpression(

 def make_show_console_message(self, thread_id, frame):
     try:
         thread_suspended_str, _thread_stack_str = self.make_thread_suspend_str(thread_id, frame, CMD_SHOW_CONSOLE, '')
         return NetCommand(CMD_SHOW_CONSOLE, 0, thread_suspended_str)
     except:
         return self.make_error_message(0, get_exception_traceback_str())

 def make_input_requested_message(self, started):
     try:
         return NetCommand(CMD_INPUT_REQUESTED, 0, str(started))
     except:
         return self.make_error_message(0, get_exception_traceback_str())

 def make_set_next_stmnt_status_message(self, seq, is_success, exception_msg):
     try:
         message = str(is_success) + '\t' + exception_msg
         return NetCommand(CMD_SET_NEXT_STATEMENT, int(seq), message)
     except:
         return self.make_error_message(0, get_exception_traceback_str())

 def make_load_full_value_message(self, seq, payload):
     try:
         return NetCommand(CMD_LOAD_FULL_VALUE, seq, payload)
     except Exception:
         return self.make_error_message(seq, get_exception_traceback_str())

 def make_get_next_statement_targets_message(self, seq, payload):
     try:
         return NetCommand(CMD_GET_NEXT_STATEMENT_TARGETS, seq, payload)
     except Exception:
         return self.make_error_message(seq, get_exception_traceback_str())

 def make_show_cython_warning_message(self):
     try:
         return NetCommand(CMD_SHOW_CYTHON_WARNING, 0, '')
     except:
         return self.make_error_message(0, get_exception_traceback_str())