subprocess stdout为Ngrok的变量

时间:2017-06-27 15:00:50

标签: python-3.x subprocess stdout popen ngrok

我正在尝试创建一个python脚本,它报告我0.tcp.ngrok.io上的端口是在终端上运行代码时启动的(在将ngrok可执行文件移动到/ usr / local / bin之后)

ngrok tcp 22

我得到了那种输出

ngrok by @inconshreveable                                       (Ctrl+C to quit)

Session Status                connecting                                        
Version                       2.2.4                                             
Region                        United States (us)                                
Web Interface                 http://127.0.0.1:4041                             
Forwarding                    tcp://0.tcp.ngrok.io:13014 -> localhost:22                                                                                 
Connections                   ttl     opn     rt1     rt5     p50     p90       
                              0       0       0.00    0.00    0.00    0.00  

我的第一次尝试是将子进程stdout记录到一个变量,但由于stdout是循环的,stdout.read()永远不会结束这就是代码

import subprocess

ngrok = subprocess.Popen(['ngrok','tcp','22'],stdout = subprocess.PIPE)

output_text = ngrok.stdout.read() # script stops here forever

[**code for getting domain:port from output_text**]

如何在不停止ngrok的情况下获取stdout到变量的“快照”?

有没有其他方法可以做到这一点(下一次尝试将是localhost上的webscrapper,但是对于其他命令,例如“top”),这将是很好的。

提前致谢

3 个答案:

答案 0 :(得分:0)

当我使用ngrok http并且所有替代方法都无法正常工作时,我遇到了同样的问题,导致死锁,我甚至可以打印使用ngrok创建的子进程响应。因此,阅读ngrok docs我注意到有一种方法可以获得有关请求的ngrok公共URL。 添加以下代码:

localhost_url = "http://localhost:4041/api/tunnels" #Url with tunnel details
tunnel_url = requests.get(localhost_url).text #Get the tunnel information
j = json.loads(tunnel_url)
tunnel_url = j['Tunnels'][0]['PublicUrl'] #Do the parsing of the get

因此,tunnel_url将返回您需要的内容。添加导入完整代码将是这样的:

import subprocess
import requests
import json

ngrok = subprocess.Popen(['ngrok','tcp','22'],stdout = subprocess.PIPE)

localhost_url = "http://localhost:4041/api/tunnels" #Url with tunnel details
tunnel_url = requests.get(localhost_url).text #Get the tunnel information
j = json.loads(tunnel_url)

tunnel_url = j['Tunnels'][0]['PublicUrl'] #Do the parsing of the get

答案 1 :(得分:0)

没有足够的声誉来评论,随时更新或评论@Rodolfo很棒的答案然后删除

也许他们稍微改变了api,这对我有用: (脚本旁边的ngrok可执行文件,在端口5000上提供http并选择https隧道URL)

import subprocess
import requests
import json
import time

if __name__ == '__main__':
    ngrok = subprocess.Popen(['./ngrok','http','5000'], 
                             stdout=subprocess.PIPE)
    time.sleep(3) # to allow the ngrok to fetch the url from the server
    localhost_url = "http://localhost:4040/api/tunnels" #Url with tunnel details
    tunnel_url = requests.get(localhost_url).text #Get the tunnel information
    j = json.loads(tunnel_url)

    tunnel_url = j['tunnels'][1]['public_url'] #Do the parsing of the get
    print(tunnel_url)

答案 2 :(得分:0)

这对我有用:

def open_tunnel():
        process = subprocess.Popen(f'/snap/bin/ngrok tcp {PORT} --log "stdout"', shell=True, stdout=PIPE, stderr=PIPE)  # You can also use a list and put shell = False
        while True:
            output = process.stdout.readline()
            if not output and process.poll() is not None:
                break
            elif b'url=' in output:
                output = output.decode()
                output = output[output.index('url=tcp://') + 10 : -1]
                return output.split(':')

我使用/snap/bin/ngrok是因为我的pycharm无法识别路径,对此感到抱歉。您可以只说ngrok来代替它

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