Question

我正在尝试使用Flask来使用子进程运行命令。在高层次上，我要做的是创建一种方法，用户可以点击URL并传入＆＃39; test_name＆＃39; [对于PoC我正在使用烟雾]。然后该测试名称将传递给flask_test_runner（）。在flask_test_runner中，我试图运行以下pytest命令

pytest -m test_name -html=report.html --self-contained-html

使用子流程

command = subprocess.Popen(["pytest", "-m", test_name, "-html=report.html", "--self-contained-html"],
                                   stdout=subprocess.PIPE, stderr=subprocess.PIPE)

所有这些都在docker容器中运行。我已尽力验证docker不是根本原因。有一次，我在dockerfile的末尾包含了一个RUN pytest，它启动了测试。

我的服务器按预期启动：

 * Serving Flask app "webserver" (lazy loading)
 * Environment: development
 * Debug mode: on
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 282-250-075

当我点击网址http://localhost:5000/apitesting/smoke时，我在响应中得到以下内容：

Content-Type: text/html; charset=utf-8
Content-Length: 0
Server: Werkzeug/0.14.1 Python/3.6.4
Date: Wed, 30 May 2018 20:20:39 GMT

我的控制台出现此错误：

  File "/usr/local/lib/python3.6/site-packages/pytest_cloud/plugin.py", line 77, in pytest_addoption
    os.path.basename(os.environ['PWD'])
  File "/usr/local/lib/python3.6/os.py", line 669, in __getitem__
    raise KeyError(key) from None
KeyError: 'PWD'

我不明白为什么会这样，所以任何帮助都表示赞赏。感谢您的时间。

作为参考，我的应用程序路线如下：

@app.route('/apitesting/<test_name>', methods=['GET', 'POST'])
def runsmoketests(test_name):
    '''
    :param test_name: test type passed in by the user 
    '''
    flask_app_cmd = api_flask_test_runner.flask_test_runner(test_name)
    print(flask_app_cmd[0])
    print(flask_app_cmd[1])
    return flask_app_cmd

我打电话的flask_test_runner是：

import subprocess

def flask_test_runner(test_name):
    '''
    :param test_name: is passed along from the route /apitesting/<test_name>
    :return: 
    '''

    command = subprocess.Popen(["pytest", "-m", test_name, "-html=report.html", "--self-contained-html"],
                               stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    (out, err) = command.communicate()

    return (out, err)

Answer 1

你的建议是

由于缺少PWD密钥，您可以尝试os.environ ['PWD'] = os.getcwd（）。希望这将设置变量，您的脚本可以继续。

我将方法更新为：

def flask_test_runner(test_name):

    # force PWD
    os.environ['PWD'] = os.getcwd()

    command = subprocess.Popen(["pytest", "-m", test_name, "-html=report.html", "--self-contained-html"],
                               stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    return command.communicate()

我现在可以毫无错误地点击endpount！

$ docker run -p 5000:5000 command_test_cont-1

 * Serving Flask app "webserver" (lazy loading)
 * Environment: development
 * Debug mode: on
 * Running on http://0.0.0.0:5000/ (Press CTRL+C to quit)
 * Restarting with stat
 * Debugger is active!
 * Debugger PIN: 282-250-075
172.17.0.1 - - [31/May/2018 13:46:57] "GET /apitesting/smoke HTTP/1.1" 0 -
172.17.0.1 - - [31/May/2018 13:46:59] "GET /favicon.ico HTTP/1.1" 200 -

使用子进程通过Flask运行命令会抛出KeyError：＆＃39; PWD＆＃39;

1 个答案: