Question

我在Linux上安装了RabbitMQ，它是一个很棒的软件。

当我运行此命令时：

sudo rabbitmqctl status

我得到了一堆输出：

[{pid,18665},
 {running_applications,
     [{rabbitmq_management,"RabbitMQ Management Console","3.1.5"},
      {rabbitmq_web_dispatch,"RabbitMQ Web Dispatcher","3.1.5"},
      {webmachine,"webmachine","1.10.3-rmq3.1.5-gite9359c7"},
      {mochiweb,"MochiMedia Web Server","2.7.0-rmq3.1.5-git680dba8"},
      {rabbitmq_management_agent,"RabbitMQ Management Agent","3.1.5"},
      {rabbit,"RabbitMQ","3.1.5"},
      {os_mon,"CPO  CXC 138 46","2.2.7"},
      {inets,"INETS  CXC 138 49","5.7.1"},
      {xmerl,"XML parser","1.2.10"},
      {mnesia,"MNESIA  CXC 138 12","4.5"},
      {amqp_client,"RabbitMQ AMQP Client","3.1.5"},
      {sasl,"SASL  CXC 138 11","2.1.10"},
      {stdlib,"ERTS  CXC 138 10","1.17.5"},
      {kernel,"ERTS  CXC 138 10","2.14.5"}]},
 {os,{unix,linux}},
 {erlang_version,
     "Erlang R14B04 (erts-5.8.5) [source] [64-bit] [rq:1] [async-threads:30] [kernel-poll:true]\n"},
 {memory,
     [{total,179426464},
      {connection_procs,300224},
      {queue_procs,14434024},
      {plugins,474968},
      {other_proc,9607952},
      {mnesia,89264},
      {mgmt_db,1539936},
      {msg_index,85175152},
      {other_ets,29060560},
      {binary,18243208},
      {code,17504466},
      {atom,1602617},
      {other_system,1394093}]},
 {vm_memory_high_watermark,0.4},
 {vm_memory_limit,1522479923},
 {disk_free_limit,1000000000},
 {disk_free,58396659712},
 {file_descriptors,
     [{total_limit,924},{total_used,17},{sockets_limit,829},{sockets_used,4}]},
 {processes,[{limit,1048576},{used,233}]},
 {run_queue,0},
 {uptime,5169640}]

它看起来像JSON，但它不是。

这是什么数据格式？你是怎么发现的？

我能找到的最近的事情是：http://erlang.org/doc/man/yecc.html

Answer 1

而不是查询rabbitctrl进程，我建议查询将返回JSON的REST api。

GET: http://localhost:15672/api/overview

以下是文档：

http://hg.rabbitmq.com/rabbitmq-management/raw-file/3646dee55e02/priv/www-api/help.html

Answer 2

from tkinter import * root = Tk() root.geometry("600x600-400+50") root.title("Game") class App: def __init__(self, master): self.master = master self.rbvar = IntVar() self.stonerb = Radiobutton(self.master, text="Stone", variable=self.rbvar, value=1, command=self.figurefunc) self.stonerb.pack() self.blackrb = Radiobutton(self.master, text="Black", variable=self.rbvar, value=2, command=self.figurefunc) self.blackrb.pack() self.board = Canvas(self.master, bg='#b35900', width=500, height=500) self.board.pack() self.figure = self.board.create_polygon(0,0, 0,0, 0,0, 0,0, 0,0, 0,0) self.stoneCoords = 60,200, 100,200, 120,230, 100,260, 60,260, 40,230 self.blackCoords = 440,200, 400,200, 380,230, 400,260, 440,260, 460,230 def figurefunc(self): if self.rbvar.get() == 1: self.board.coords(self.figure, self.stoneCoords) self.board.itemconfig(self.figure, fill='#f2f2f2') else: self.board.coords(self.figure, self.blackCoords) self.board.itemconfig(self.figure, fill='black') myapp = App(root)的输出格式是Erlang术语或Erlang ETF（外部术语格式）。

您可以使用python库erl_terms将输出转换为Python可用的内容：

rabbitmqctl

Answer 3

如果有人对使用命令行util而不是UI插件感兴趣，则可以使用我编写的这个开源简单解析器： https://github.com/yuvaltir/RabbitMQNet 使用示例：

DATE(DATE)

Answer 4

rabbitmqctl具有--formatter标志，以请求可选的JSON格式的输出。例如：

sudo rabbitmqctl status --formatter json | jq .disk_free_limit
50000000

Answer 5

这是我在python中为此目的制作的方法，它只需要PyYAML（在pypi中可用）。第一次修订，可能是次优或错误，但对我有用：

import re
import subprocess
import yaml


def fix_dicts(json_str_list, pos):
    '''this recursive function puts all comma-separted values into square
    brackets to make data look like normal 'key: value' dicts'''
    quoted_string = False
    value = True
    value_pos = 0
    commas = False
    is_list = False
    in_list = 0
    while pos < len(json_str_list):
        if not quoted_string:
            if json_str_list[pos] == '{':
                json_str_list, pos = fix_dicts(json_str_list, pos+1)
            elif json_str_list[pos] == '"':
                quoted_string = True
            elif json_str_list[pos] == ':':
                value = True
                value_pos = pos + 1
            elif json_str_list[pos] == '[':
                if value and not commas:
                    is_list = True
                    in_list += 1
            elif json_str_list[pos] == ']':
                in_list -= 1
            elif json_str_list[pos] == ',':
                commas = True
                if not in_list:
                    is_list = False
            elif json_str_list[pos] == '}':
                if not is_list and commas:
                    json_str_list = (json_str_list[:value_pos] + ['[']    +
                                     json_str_list[value_pos:pos] +    [']'] +
                                     json_str_list[pos:])
                pos += 2
                return json_str_list, pos
        elif json_str_list[pos] == '"':
            quoted_string = False
        pos += 1
    return json_str_list, pos


def squash_dicts(input_data):
    # recursively converts [{a:1},{b:2},{c:3}...] into {a:1, b:2, c:3}'''
    if type(input_data) is list:
        for i in range(len(input_data)):
            input_data[i] = squash_dicts(input_data[i]) 
        if all([type(e) is dict for e in input_data]):
            input_data = dict([(k,v) for e in input_data for k,v in e.items()])
    elif type(input_data) is dict:
        for k, v in input_data.items():
            input_data[k] = squash_dicts(v)
    return input_data


text = subprocess.check_output(['rabbitmqctl','status'])
text = text.splitlines()
text = text[1:]  # skip the first line "Status of node..."
text = ''.join(text)  # back into string for regex processing
# quote strings
bad_yaml = re.sub(r'([,{])([a-z_A-Z]+)([,}])', r'\1"\2"\3', text)
# change first element into a key - replacing ',' with ':'
bad_yaml = re.sub(r'({[^,]+),',r'\1:', bad_yaml)
bad_yaml_list = list(bad_yaml)  # into a list for another fix
good_yaml, _ = fix_dicts(bad_yaml_list, 0)
status_list = yaml.load(''.join(good_yaml))
status_dict = squash_dicts(status_list)
# now we can use "status_dict" - it's an ordinary dict
print(yaml.safe_dump(status_dict, default_flow_style=False))

Answer 6

这是一个很长的单线，除了“标准内容”外没有任何依赖项。它将输出转换为json：

rabbitmqctl -q cluster_status | tr '{}()<>'\' '[][][]"' | sed -e 's|\([\[,]\)\([A-Za-z][^,\]*\)|\1"\2"|g'

如何解析rabbitmq状态输出？

6 个答案: