python_02

Python代码运行助手

Python代码运行助手可以让你在线输入Python代码，然后 $\color{red}{通过本机运行的一个Python脚本来执行代码}$
首先運行一個 $\color{purple}{腳本}$ (保存爲.py格式)，然後打開https://127.0.0.1:39093/這個鏈接，在裏面輸入代碼，再run，就能運行。
如下：
index4.png
index5.png
$\color{purple}{腳本}$ ：

    #!/usr/bin/env python3
    # -*- coding: utf-8 -*-

    r'''
    learning.py

    A Python 3 tutorial from https://www.liaoxuefeng.com

    Usage:

    $ python3 learning.py
    '''

    # check #######################################################################

    import sys
    from datetime import datetime

    CERT_EXPIRES = '2020-08-07'

    def check_version():
        v = sys.version_info
        if v.major == 3 and v.minor >= 6:
            return
        print('Your current python is %d.%d. Please use Python 3.6.' % (v.major, v.minor))
        exit(1)

    def check_cert():
        today = datetime.now().strftime('%Y-%m-%d')
        if today >= CERT_EXPIRES:
            print('This learning.py is expired. Please download a newer version.')
            exit(1)

    check_version()
    check_cert()

    # start server ################################################################

    import os, io, json, subprocess, tempfile, ssl
    from urllib import parse
    from http.server import HTTPServer, BaseHTTPRequestHandler, SimpleHTTPRequestHandler

    EXEC = sys.executable
    PORT = 39093
    TEMP = tempfile.mkdtemp(suffix='_py', prefix='learn_python_')

    HTML_INDEX = r'''
    <html>
    <head><title>Learning Python</title></head>
    <body>
        <form method="post" action="/run">
        <textarea name="code" style="width:90%;height: 600px"></textarea>
        <p><button type="submit">Run</button></p>
        </form>
    </body>
    </html>
    '''

    class LearningHTTPRequestHandler(BaseHTTPRequestHandler):

        def do_GET(self):
            self.close_connection = True
            if self.path != '/':
                return self.send_error(404)
            self._sendHttpHeader('text/html')
            self._sendHttpBody(HTML_INDEX)

        def do_POST(self):
            self.close_connection = True
            if self.path != '/run':
                return self.send_error(400)
            print('Prepare code...')
            body = self.rfile.read(int(self.headers['Content-length']))
            qs = parse.parse_qs(body.decode('utf-8'))
            if not 'code' in qs:
                return self.send_error(400)
            code = qs['code'][0]
            r = dict()
            try:
                fpath = write_py(get_name(), code)
                print('Execute: %s %s' % (EXEC, fpath))
                r['output'] = decode(subprocess.check_output([EXEC, fpath], stderr=subprocess.STDOUT, timeout=5))
            except subprocess.CalledProcessError as e:
                r = dict(error='Exception', output=decode(e.output))
            except subprocess.TimeoutExpired as e:
                r = dict(error='Timeout', output='执行超时')
            except subprocess.CalledProcessError as e:
                r = dict(error='Error', output='执行错误')
            print('Execute done.')
            self._sendHttpHeader()
            self._sendHttpBody(r)

        def _sendHttpHeader(self, contentType='application/json'):
            origin = self.headers['Origin'] or 'https://www.liaoxuefeng.com'
            self.send_response(200)
            self.send_header('Content-Type', contentType)
            self.send_header('Access-Control-Allow-Origin', origin)
            self.send_header('Access-Control-Allow-Methods', 'GET,POST')
            self.send_header('Access-Control-Max-Age', '86400')
            self.end_headers()

        def _sendHttpBody(self, data):
            body = b''
            if isinstance(data, bytes):
                body = data
            elif isinstance(data, str):
                body = data.encode('utf-8', errors='ignore')
            else:
                body = json.dumps(data).encode('utf-8', errors='ignore')
            self.wfile.write(body)

    def main():
        certfile = write_cert()
        httpd = HTTPServer(('127.0.0.1', PORT), LearningHTTPRequestHandler)
        httpd.socket = ssl.wrap_socket(httpd.socket, certfile=certfile, server_side=True)
        print('Ready for Python code on port %d...' % PORT)
        print('Press Ctrl + C to exit...')
        httpd.serve_forever()

    # functions ###################################################################

    INDEX = 0

    def get_name():
        global INDEX
        INDEX = INDEX + 1
        return 'test_%d' % INDEX

    def write_py(name, code):
        fpath = os.path.join(TEMP, '%s.py' % name)
        with open(fpath, 'w', encoding='utf-8') as f:
            f.write(code)
        print('Code wrote to: %s' % fpath)
        return fpath

    def decode(s):
        try:
            return s.decode('utf-8')
        except UnicodeDecodeError:
            return s.decode('gbk')

    # certificate #################################################################

    def write_cert():
        fpath = os.path.join(TEMP, 'local.liaoxuefeng.com.pem')
        with open(fpath, 'w', encoding='utf-8') as f:
            f.write(CERT_DATA)
        return fpath

    CERT_DATA = r'''
    -----BEGIN RSA PRIVATE KEY-----
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    -----END RSA PRIVATE KEY-----
    -----BEGIN CERTIFICATE-----
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    -----END CERTIFICATE-----
    -----BEGIN CERTIFICATE-----
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    -----END CERTIFICATE-----
    '''

    # start main at last ##########################################################

    if __name__ == '__main__':
        main()